Wyniki wyszukiwania - BazTech

1

Zrównoważony transport żywności elementem ograniczenia zużycia zasobów

Topczewska Jadwiga, Pięta Eryka, Bizior Aneta

Polish Journal for Sustainable Development

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2024

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T. 28, nr 1

215--222

PL

Celem pracy było oszacowanie możliwości wprowadzenia alternatywnych rodzajów napędu w samochodach ciężarowych oraz ograniczenie transportu żywności celem zmniejszenia emisji gazów cieplarnianych. Zrównoważenie transportu można osiągnąć poprzez przejście na bardziej wydajne środki transportu i/lub pojazdy o niższej emisji, zwłaszcza o napędzie elektrycznym lub wodorowym. Kluczowym w tym przypadku jest rozwój dedykowanej infrastruktury ładowania oraz uruchomienie programów wsparcia dla zakupu takiej floty. Konieczne jest również przekształcenie systemów żywnościowych w taki sposób, aby konsumenci w większym zakresie korzystali z żywności produkowanej lokalnie i sezonowo. Optymalizacja dystrybucji, w tym krótkich łańcuchów dostaw może również przyczynić się do realizacji zrównoważonego transportu. Wymienione działania sprzyjają retardacji antropopresji w środowisku przyrodniczym.

EN

The aim of this study was to assess the feasibility of introducing alternative types of propulsion into trucks and reducing food transport to reduce greenhouse gas emissions. Sustainable transport can be achieved by improving energy efficiency, switching to lower- emission vehicles, and / or more efficient modes of transport, especially by introducing electric or hydrogen-powered vehicles. Food systems also need to be transformed so that consumers make more use of locally and seasonally produced food. Optimising distribution, including short supply chains, can also contribute to the realisation of sustainable transport. These measures promote the retardation of anthropopressure in the natural environment.

2

Optymalizacja i walidacja metody oznaczania polichlorowanych bifenyli w glebie

Hućko Agnieszka, Szpyrka Ewa

Polish Journal for Sustainable Development

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2024

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T. 28, nr 1

93--98

PL

Polichlorowane bifenyle (PCB) są to syntetyczne związki aromatyczne produkowane w dużych ilościach na całym świecie od lat trzydziestych XX wieku. Ich synteza została zabroniona w latach 70 XX wieku. Związki te miały szerokie zastosowanie między innymi jako płyny dielektryczne w kondensatorach i transformatorach, smary czy plastyfikatory. Ze względu na właściwości tych związków, takie jak odporność na degradację chemiczną i długi okres półtrwania (od 3 do 40 lat), stanowią one trwałe zanieczyszczenia środowiska. Najwyższe ich ilości znajdują się w glebie, jednak można je oznaczyć również w powietrzu, osadach, wodzie, roślinach, a nawet organizmach żywych. Celem pracy była optymalizacja i walidacja metody oznaczania kongenerów PCB 10, 28, 138, 153 i 180 w glebie. W procesie optymalizacji metody, testowano trzy odczynniki do ekstrakcji oraz dwa rodzaje sorbentów do oczyszczania. Walidację przeprowadzono na dwóch poziomach wzbogacenia w celu określenia odzysku i precyzji metody. Zoptymalizowaną i zwalidowaną metodę zastosowano do analizy zawartości wybranych kongenerów PCB w próbkach rzeczywistych pobranych z terenu Podkarpacia. Na podstawie przeprowadzonych badań wykazano, że najlepszym odczynnikiem do ekstrakcji PCB z gleby jest heksan, zaś sorbentem do oczyszczania Florisil. Stężenie PCB 10, 28, 52, 138 i 153 w analizowanych próbkach rzeczywistych było poniżej granicy oznaczalności (LOQ<0,005 mg/kg). PCB 180 oznaczono na poziomie 0,007 mg/kg w glebie pobranej z terenu obok linii kolejowych w Głuchowie.

EN

Polychlorinated biphenyls (PCBs) are synthetic aromatic compounds produced in large quantities around the world since the 1930s, the synthesis of which was banned in the 1970s. These compounds were widely used, among others, as dielectric fluids in capacitors and transformers, grease and plasticizers. Due to the properties of these compounds, such as resistance to chemical degradation and long half-life (from 3 to 40 years), they constitute persistent environmental pollutants. The highest amounts are found in the soil, but they can also be determined in the air, sediments, water, plants and even living organisms. The aim of the work was to optimize and validate the method for determining PCB congeners 10, 28, 138, 153 and 180 in soil. As part of the method optimization, three extraction reagents and two types of purification sorbents were tested. Validation was performed at two fortification levels to determine the recovery and precision of the method. The optimized and validated method was used to analyze the content of selected PCB congeners in real samples collected from the Podkarpacie region. Based on the conducted research, it was shown that the best reagent for the extraction of PCBs from soil is hexane, and the best sorbent for purification is Florisil. The concentration of PCB 10, 28, 52, 138 and 153 in the analyzed real samples was below the limit of quantification (LOQ<0.005 mg/kg). PCB 180 was determined at a level of 0.007 mg/kg in soil taken from the area next to the railway lines in Głuchów.

3

Wstępna analiza wymywalności związków organicznych do wód powierzchniowych z odpadowego destruktu asfaltowego

Gasik-Kowalska Natalia, Grabowski Paweł, Gryszpanowicz Piotr

Materiały Budowlane

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2024

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nr 6

36--41

PL

Rozporządzenie Ministra Środowiska z 2021 r. pozwala na zdjęcie statusu odpadu z destruktu asfaltowego. Materiał taki musi jednak spełniać wytyczne dotyczące m.in. zawartości zanieczyszczeń organicznych, w szczególności wielkocząsteczkowych węglowodorów aromatycznych (WWA). Zastosowanie materiału bez odpowiedniej analizy może wiązać się z wieloma zagrożeniami w stosunku do istniejących ekosystemów, w tym wodnych. W artykule zaprezentowano wyniki analizy wymywalności związków organicznych do ekosystemu wodnego. Przedstawiono wyniki badań próbek destruktów asfaltowych pobranych z 10 ulic w obrębie miasta Płocka. Badania realizowano pod kątem analizy właściwości chemicznych mogących stanowić potencjalne zagrożenie dla środowiska.

EN

The Regulation of the Minister of the Environment of 2021 allows for the removal of the waste status from reclaimed asphalt. However, such a material must meet guidelines regarding, among others, the content of organic pollutants, in particular polycyclic aromatic hydrocarbons (PAHs). Unfortunately, the use of material without analysis may involve a number of threats to existing ecosystems, including aquatic ecosystems. In the arcticle the authors present the results of the analysis of the leachability of organic compounds into the aquatic ecosystem. The results of testing samples of reclaimed asphalt for 10 streets in the city of Płock are presented. The research were carried out to analyze chemical properties that could pose a potential threat to the environment.

4

Water resources and physicochemical properties of the Mio-Pliocene aquifer complex in the M’leta Plain, Western Algeria

Khelifa Mohammed, Khedidja Abdelhamid, Mansour Hamidi, Azzeddine Reghais

Journal of Water and Land Development

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2024

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no. 61

11--20

EN

The aquifers in the M’léta Plain are crucial for supplying drinking water and supporting industrial and agricultural water needs. However, they are facing a pollution risk and environmental degradation. The present study aims to assess the groundwater quality in the M’léta Plain, focusing on its physicochemical properties, statistics of the aquifer, pollution risks, and factors influencing the water mineralisation process. The analysis of 16 samples reveals that the water contains high levels of sulphates and chlorides, often accompanied by sodium, calcium, or magnesium. This suggests two distinct water types or facies: one characterised by sodium chloride or calcium chloride, and the other with calcic or sodic sulphate waters, sometimes including magnesium sulphate. These facies may be attributed to the influence of different formations at the outcrop. Statistical analyses reveal a strong correlation between electrical conductivity and the majority of chemical elements, indicating the impact of freshwater interacting with the underlying rock formations on mineralisation. Some results also show undersaturation of certain minerals. Furthermore, the study evaluates the water's suitability for irrigation in the M’léta Plain in accordance with Richards’ classification.

5

Strategic sustainability : Unveiling the crucial role of solid waste management in environmental balance

Aldouri Seror N.M.

Journal of Water and Land Development

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2024

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no. 61

143--150

EN

This research investigates sustainable solid waste management practices at the State Company for the Manufacture of Medicines and Medical Supplies in Samarra. Using Statistical Package for the Social Sciences (SPSS) ver. 23, key variables such as education, participation, implementation, and policy were analysed to assess their impact on environmental balance. A sample of 62 staff members was surveyed from a population of 785, ensuring reliability and representative insights. The study revealed high internal consistency and validity for the analysed variables. Sustainable management dimensions were thoroughly explored, and the average score for sustainable management was found to be 3.102, indicating a strong level of agreement among participants regarding these dimensions. Specific hypotheses related to education, participation, implementation, and policy were confirmed through robust statistical analyses. Variation analysis revealed statistically significant differences in sustainable management dimensions and their impact on environmental balance. Regression analysis demonstrated relationships between participation, implementation, policy, and environmental balance, with R2 (coefficient of determination) values indicating the explanatory power of these relationships. The results underscore the critical role of education, participation, implementation, and policy in achieving environmental balance within the context of sustainable waste management practices. This study contributes valuable insights into effective strategies for promoting environmental sustainability in waste management initiatives, emphasising the importance of targeted interventions in education, participatory engagement, implementation strategies, and policy frameworks.

6

Assessment of heavy metal pollution in groundwater using a multivariate analysis approach

Sbai Khalid, Tahri Latifa, Hafiane Fatima Zahra, Halima Oumaima Iben, Fekhaoui Mohammed

Journal of Water and Land Development

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2024

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no. 61

175--182

EN

The current study aims to assess underground water pollution using an integrated approach that combines statistical methods such as principal component analysis (PCA) and water quality diagrams (Piper diagram, Schoeller-Berkalov diagram). A total of twenty water samples were collected from the Tiflet region in the Sebou basin and analysed for various physicochemical parameters, including temperature, pH, and heavy metal concentrations (Cu2+, Zn2+, Fe2+ and Pb2+). The average concentrations of Pb2+, Zn2+, Cu2+, and Fe2+ in the water samples were found to be 41.9, 14.8, 20.1, and 8.1 mg∙dm-3, respectively. These concentrations indicate a significant presence of heavy metals in the groundwater samples. Therefore, it can be concluded that the groundwater in this area is heavily polluted with heavy metals and other pollutants. This finding raises concerns regarding the use of this water for irrigation and agricultural activities in the region. This suggests that these four components play a crucial role in determining the overall water quality. The distribution patterns of the metals Pb2+, Zn2+, Cu2+, and Fe2+ in the well water within the study area are of particular environmental concern. It is recommended to establish a monitoring network to ensure the sustainable management of water resources in order to address this issue effectively.

7

Removal of Divalent Copper Ions from Aqueous Solution using Sorghum bicolor L. Stem Waste as an Effective Adsorbent

Annisa Rika Wahyuni Rusti, Fahruddin Fahruddin, Taba Paulina

Journal of Ecological Engineering

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2024

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Vol. 25, nr 5

165--174

EN

Sorghum stem (Sorghum bicolor L.) is a plant that has not been maximally utilized. But sorghum stems contain high cellulose. The hydroxyl (OH-) and carboxyl (-COOH) groups on cellulose can bind heavy metals; therefore, sorghum stems have the opportunity to be used as an adsorbent to absorb heavy metals, especially Cu(II) metal, which can pollute the environment. Therefore, this research was conducted to determine the optimum pH, contact time, and the adsorption capacity of Cu(II) using HNO3 modified sorghum stem adsorbent. The stages of the research included the preparation of sorghum stem adsorbent, modification of adsorbent with HNO3 , determination of optimum pH, optimum contact time and adsorption capacity of Cu(II) metal. Furthermore, the functional groups of the adsorbent before and after modification were determined by FTIR. SEM-EDS to assess the morphological structure and chemical components contained in the adsorbent. After the research, the optimum pH of Cu(II) metal adsorption was pH 6, and the adsorption power was 99.88%. The optimum contact time is 10 minutes. The percent removal of Cu(II) metal with concentrations of 10, 30, 50, and 100 ppm were 79.96; 79.90; 56.40 and 54.04%, respectively. Adsorption of Cu(II) metal using HNO3 modified sorghum stem adsorbent followed the Freundlich isotherm pattern compared to Langmuir with R2=0.9039. It is concluded that activated sorghum stem can be used as Cu(II) metal adsorbent.

8

Physico-Chemical and Microbiological Pollution of Industrial Wastewater from Levrier Bay in Mauritania

Maleck Moulaye M’Hamed Abdel, Zamel Mohamed Lemine Cheikh, Elmamy Cherif Ahmed Ahmed, Driss Belghyti, Abdellahi Mohamed Vall Mohamed

Journal of Ecological Engineering

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2024

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Vol. 25, nr 4

370--379

EN

The objective of this study was to conduct a preliminary assessment of the potential impacts of effluents from freezing plants and fishmeal and oil factories in the Levrier Bay on the aquatic environment through physicochemical and microbiological characterization. Effluent samples from various factories were collected and characterized by pH, dissolved oxygen (DO), electrical conductivity (EC), total dissolved solids (TDS), salinity, temperature (T), phosphate (PO4), nitrate (NO3), nitrite (NO2), biochemical oxygen demand (BOD5), total coliforms (TC), Escherichia coli (EC), and fecal streptococci (FS). The concentration ranges of the effluents were as follows: pH (6.75 to 8.57), DO (1.56 to 4.66 mg/l), EC (26620 to 78520 µS/cm), TDS (13.15 to 38.70 g/l), salinity (16.26 to 49.68 PSU), T (7.67 to 32.7 °C), PO4 (0.25 to 80.6 mg/l), NO3 (1.77 to 74.03 mg/l), NO2 (0.02 to 1.84 mg/l), and BOD5(0.5 to 7150 mg/l). TC (2.3×103 to 4.6×106CFU/100 ml), EC (50 to 2×106CFU/100 ml), and FS (3.4×103to 2.3×107CFU/100 ml). The evaluated characteristics of these effluents are likely to contaminate and degrade the receiving water bodies (exceeding international standards). Hence, pretreatment of the effluent discharge is indispensable

9

Monitoring and Evaluation of Pharmaceutical Eco-Pollutants in Wastewater in Kazakhstan Cities

Tulegenova Symbat, Zhantokov Bolatbek, Beisenova Raikhan, Shyngysbayeva Zhadyra, Dukenbayeva Asiya, Rakhymzhan Zhanar

Journal of Ecological Engineering

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2024

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Vol. 25, nr 7

359--370

EN

Currently, the pharmaceutical industry is one of the most developing and dynamic sectors of the global economy. Existing methods of wastewater treatment do not always allow the complete removal of pharmacological preparations, which leads to the fact that these substances enter water resources and can have a negative impact on ecosystems and human health. Due to the increase in water pollution with pharmacological preparations, there is a need for more in-depth research in this area. Assessment of the level of contamination with pharmacological substances in the wastewater of megacities is an important aspect of environmental protection and public health. The purpose of this research work is to evaluate pharmacological pollutants in the wastewater of megacities. This study is aimed at identifying APIs (active pharmaceutical ingredients) that are most likely to have a negative impact on the environment in Kazakhstan. To analyze the content of Amoxicillin, Clarithromycin, Ofloxacin, Ciprofloxacin, Atenolol, Metoprolol, Propranolol, Paracetamol, Ibuprofen, Diclofenac, Cabramazepine and other medicinal substances, standards of these substances were added to the wastewater sample and analyzed by the HPLC-MS method. As a result of this research work, information was obtained on the current level of contamination with pharmacological substances in the wastewater of megacities and their impact on ecosystems and human health. The results of the study can be used to develop measures to reduce pollution and conserve water resources for future generations.

10

Incidence of the Leachates from the Quevedo Emerging Cell on the Water Quality of the Limón Stream, San Cristóbal Parish, Quevedo Canton

Guime Baldión Karla Yanick, Mendoza Cedeño Laura Gema

Journal of Ecological Engineering

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2024

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Vol. 25, nr 1

65--73

EN

The present study aimed to assess the impact of leachates from the emerging cell on the water quality of the Limón stream in Ecuador. Five sampling points were selected as references using the NTE INEN 2176:2013 standard. Subsequently, these samples were analyzed in a laboratory using the standard methods for the examination of water and wastewater for the respective physicochemical analysis. The analysis results were compared with the Unified Text of Secondary Legislation of the Ministry of the Environment, and the water quality index (WQI) was determined according to the National Sanitary Foundation (NSF). Additionally, an environmental diagnosis was conducted based on the cause-effect matrix by Leopold to propose a strategy for the restoration and ecological recovery of the affected components. According to the obtained results, the sampling points closer to the leachate discharge showed high concentrations of dissolved oxygen, iron, fecal coliforms, biochemical oxygen demand (BOD), chemical oxygen demand (COD), and total suspended solids (TSS), which exceeded the maximum permissible limits according to legislation. This resulted in a “fair” water quality index classification according to the WQI classification. These findings highlight the importance of considering and assessing the environmental impacts. A total of 24 impacts were identified on physical, biotic, and anthropic components, with 4.76% being highly significant, 42.86% significant, and 52.38% negligible. In conclusion, the results indicate a scenario of environmental deterioration at the leachate discharge stations, urging the urgent implementation of corrective measures to address the detected high contamination.

11

Environmental Impact Analysis of Waste Lithium-Ion Battery Cathode Recycling

Xiaodong Sun, Ishchenko Vitalii

Journal of Ecological Engineering

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2024

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Vol. 25, nr 7

352--358

EN

This study introduces the current status of recycling technology for waste lithium-ion batteries, with a focus on the environmental impact during the recycling process of waste lithium-ion battery cathode materials. Composition of lithium-ion battery was analyzed in order to estimate which components are potentially dangerous to the environment. Heavy metals are main pollutants and change the pH of the environment; also, organic solvent actively reacts with oxidants and reducing agents in the environment. Other parts of waste battery mainly impact an air during the combustion or thermal decomposition generating toxic lithium, cobalt oxides, other gases. Sources of air, water, noise pollution, solid waste, and toxic chemicals generated in the recycling process were identified. Air pollutants generated at every stage of the process of positive electrode materials recycling include dust, acidic gases, and organic gases. The wastewater is generated mainly from the discharge pretreatment and cathode recovery processes (leaching and extraction). Although the wastewater volume is relatively small, its composition is complex, poorly biochemical and toxic (lithium compounds, organic solvents, etc.). In the dismantling process, plastic connectors, circuit boards, high-voltage wiring, powders, collectors and pool electrode material casings are generated as solid waste. Corresponding pollution prevention and control measures are suggested to prevent environmental pollution during the recycling process of waste lithium-ion battery cathode materials.

12

Detection of Some Heavy Metals Used in the Surface Soil (Sediments) from Khirbet Al-Samra in Jordan

Alkhawaldeh Ahmad Khalf, Natsheh Iyad Y., Alsaleh Majd M, Shatnawi Mohamad, Shahrour Wesam, Majdalawi Majdi M., Alsarhan Ali Ata

Journal of Ecological Engineering

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2024

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Vol. 25, nr 8

160--167

EN

Spatial analysis was used to analyze the environmental quality of soil in the Al-Zarqa region in order to identify sources and estimate heavy metal concentrations, which aided in the assessment of soil quality and heavy metal pollution. The primary goal of this study was to assess the environmental impact of heavy metal pollutants in the Al-Zarqa region. To assess pollution levels, the concentrations of Cu, Mn, Cd, and Pb were measured in surface soil (sediment) samples collected from Khirbet al-Samra. A total of sixteen samples were analyzed. The elevated levels of Cu and Cd are primarily attributed to various sources such as the weathering of nearby rock formations and the release of agricultural waste materials. An evaluation of sediment contamination was conducted using pollution indicators including Geo-accumulation index (Igeo), enrichment factor (EF), and pollution load index (PLI). Spatial distribution analysis was used to determine the distribution pattern of each metal. The results revealed that metal concentrations (Cu, Pb, and Mn) are higher, while Cd concentrations are lower than the maximum allowed limits. The results from the EF analysis indicated elevated concentrations of Cu and Cd in the sampled area. In terms of the Igeo analysis of Khirbet al-Samra sediments, it was found that the concentrations of Pb, Cu, and Mn are within safe levels and relatively unaffected by human activities, whereas the concentrations of Cd exceed the mean values, suggesting a higher level of contamination specifically for cadmium. The potential sources of heavy metals in the investigated area were identified using factor analysis, and the geographical distribution of heavy metals was shown using spatial distribution. The examination of correlation coefficients revealed diverse relationships between the different parameters, depending on the source of input for each metal.

13

Use Fry of Cyprinus Carpio as Biomarker for Lead and Cadmium

Aljaryan Sara Khalid, Al-Amari Moayed J. Y., Al-Rezzaq Adi Jassim Abd

Ecological Engineering & Environmental Technology

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2024

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Vol. 25, iss. 3

64--69

EN

Fishes are considered a good biomarker, and bioindicator of pollution, Our current research aims to investigate the magnification of (Pb and Cd) and how both affect antioxidants and use fry carp Cyprinus carpio as a bioindicator. The samples were analyzed to find the possible biomagnification of metals in fish. The highest concentration in fry fish fed with Artemia used Dunaliella salina as food treated with Pb in Food type 1 for 28 days, with a significant difference. The highest concentration of Cd in fry fish fed with Artemia used D. salina as food treated with Cd in food type 1 for 28 days, with a significant difference. The activity of the enzyme (SOD - GSH - CAT– GST) U/gm is affected by toxicity in fry fish mussels. The investigation has proved that exposure of fish to (lead and cadmium) induced a significant increase in content and increased activity of GST U/gm. For this purpose, an aquarium-based trial was conducted with two different types of food treated with Cd and Pb. The highest concentration of SOD U/gm enzyme of fry fish fed with Artemia used D.salina treated with Pb in food type 1 for 28 days when fry fish fed on Artemia used food treated with Pb the results show a strong positive significant correlation between (GPX, with SOD and CAT) U/gm and (SOD, with CAT) U/gm. While the concentration has a positive significant correlation with all enzymes, With Cd the highest concentration was in the SOD U/gm enzyme in fry fish fed with Artemia that used D. salina as food treated with Cd in food type 2 for 28 days.

14

The Effect of Fertilizers on the Extraction of Heavy Metals and Arsenic in Soil by Plant Biomass

Kholikulov Shodi, Bobobekov Isomiddin, Abdurakhimov Mingjigit, Abdumalikov Jasurbek, Yakubov Tursunboy

Ecological Engineering & Environmental Technology

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2024

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Vol. 25, iss. 1

227--237

EN

According to the data given in the article, the soil around the Samarkand chemical plant is strongly contaminated with heavy metals. The greatest pollution is noted within a radius of 1500–2000 meters from a chemical plant in the western and northern directions. In areas subject to the influence of heavy metals and arsenic, the use of mineral and organic fertilizers reduced the content of mobile forms of these elements in the soil and improved the growth and development of plants. As a result, crop yields increase, and the transfer of heavy metals into plants is reduced. The use of mineral and organic fertilizers in soils contaminated with these elements, along with increasing the yield of cotton, reduced the amount of element removed by the crop by 25–80% compared to the control variant. That is, in the variant where mineral and organic fertilizers were applied together (N250P175K125 + cattle manure, 30 t/ha), the largest reduction in the removal of these elements by the cotton crop was found in the cobalt (80%) and the lowest in the copper (25%).

15

Study of The Physico-Chemical and Microbiological Quality of Water from River Innaouene, Taza Province, Morocco

Fiouz Abderrahim, Chakiri Said, Najem Ayoub, El Hezzat Mounir, Ben Abbou Mohamed, Lamnii Abderrahim, Chibani Abdelkader, Aouji Marouane, Warad Ismail, Zarrouk Abdelkader

Ecological Engineering & Environmental Technology

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2024

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Vol. 25, iss. 2

254--271

EN

In recent decades, the province of Taza has undergone extensive agricultural modernization, marked by an increase in industrial units such as modern oil mills and olive canneries. At the same time, rapid population growth has exacerbated an important problem, the deterioration of the quality of water resources in limited quantities. This study explored the heart of matter by meticulously sampling physico-chemical and bacteriological parameters at eight strategically chosen sites. Conducted in late July 2021, the survey focused on the surface waters of the Innaouene River, providing a timely and insightful examination of the complex dynamics of water quality in the context of modernization and demographic change. This work focused on the determination of physicochemical and microbiological parameters of water. The results of the analyses show that this river is subject to multiple constraints and reaches its tolerance level on most of its sections. A multivariate statistical approach: principal component analysis (PCA) has shown that water pollution in the Innaouene River is mainly related to untreated wastewater discharges into streams. Water quality is considered bad to very bad. Therefore, ecological and health impacts can occur.

16

Synergistic governance of digital economy development and carbon reduction: evidence from Chinese cities

Ma Nian, Deng Ying

Ecological Chemistry and Engineering. S

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2024

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Vol. 31, nr 2

203--213

EN

As a fundamental driving factor for high-quality advancement, elucidation remains requisite regarding the potential of the digital economy (DE) in achieving conjoined governance aimed at pollution reduction and carbon reduction (PCR). This study conducts a comprehensive analysis of the nexus between digital economic development (DED) and carbon mitigation. Empirical analyses are conducted utilising panel data encompassing Chinese municipalities from 2011 to 2020, enabling a quantitative evaluation of the influence exerted by DED on the concerted governance of carbon reduction and haze mitigation. The results emphasise that: DED cultivates conducive circumstances for curtailing carbon emissions and addressing haze pollution, with subsequent robust testing reinforcing the enduring significance of DED’s impact on PCR. Heterogeneity analysis reveals the pronounced effect of DED on PCR, particularly discernible in provincial capitals, eastern municipalities, as well as first and second-tier urban centers, alongside metropolises of significant magnitude. The reciprocal impact of DED on PCR predominantly stems from industrialisation synergies, primarily attributed to the optimisation and advancement of industrial structure, concomitant with enhancements in production efficiency.

17

Does the chief executive officer green experience contribute to the low-carbon transition of the organisation?

Xiong Xiaoliang

Ecological Chemistry and Engineering. S

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2024

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Vol. 31, nr 2

215--224

EN

From the perspective of chief executive officer (CEO) green experience, this paper delves into the catalysts propelling corporate transitions toward lower carbon footprints, empirically evaluating these factors using listed company data from 2011 to 2020. The study reveals that CEO green experience contributes to diminishing corporate carbon intensity, thereby fostering the shift towards lower carbon operations. Notably, this finding persists even after subjecting the analysis to robustness tests. However, the impact of CEO green experience, while promoting corporate low-carbon transitions, is comparatively lesser than other influential factors. This discrepancy exhibits distinct variations within the ownership structure and pollution attributes of companies. Specifically, the significance of CEO green experience is more pronounced in non-state-owned enterprises and heavily polluting firms.

18

Magnetic pollution produced by underground XLPE 220 kV power cable in power plant

Rezzag Bara Ilies, Ayad Ahmed Nour El Islam, Krika Wafa, Fezazi Omar, Larouci Benyekhlef

Diagnostyka

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2024

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Vol. 25, No. 1

art. no. 2024104

EN

The expansion of the electrical network necessitates the construction of new power plants and the extension of overhead and underground power transmission and distribution systems. However, underground power cables, such as XPLE 220 kV, can cause significant electromagnetic pollution, particularly in urban areas. This paper focuses on the evaluation and prediction of such magnetic emissions using analytical, numerical simulation (the finite element analysis), and experimental measurement. The paper aim is to minimize the magnetic emissions through the adjustment of the horizontal and vertical distances (x, y) of cables, serving as a technical solution. Additionally, the study investigated the impact of faults with varying magnitude and frequency, considering different loads and conditions. The simulation results indicate that several factors contribute to the escalation of magnetic pollution. These factors include a close proximity between cables, faults, and high current intensities.... However, as the distance between cables increases both horizontally and vertically, the strength of the magnetic field decreases, leading to a reduction in magnetic pollution. A comparison was carried out to assess the magnetic emissions of the underground cable, revealing a notable resemblance between the measured and calculated values. Ultimately, the validated simulation model serves as a valuable tool for evaluating, predicting, and mitigating electromagnetic pollution under different fault conditions and positions.

19

Experimental investigation on dielectric properties of 1512L insulator using finite element analysis (FEM)

Belhouchet Khaled, Zemmit Abderrahim, Ouchen Lyamine, Alti Nadjim, Zorrig Assam

Diagnostyka

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2024

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Vol. 25, No. 2

art. no. 2024209

EN

In this work, a study on a cap and pin insulator (1512L) is proposed to evaluate the distribution of the electric field and the potential along the insulator under different conditions. A computational and experimental study for the examination of a real insulators model is assessed. Tests on contaminated insulators in the laboratory under the suggested conditions have been carried out. Finite element methods (FEM) have been employed in the numerical analysis to assess the electrical properties of the insulator under the suggested contamination profiles, including potential and electric field. The study proposed in this paper provides an effective and practical tool for analysis and enhance the dielectric properties of the studied insulator.

20

Introduction to the Special Issue: Geophysics and remote sensing for resources and ecosystem sustainability in an environmentally constrained world

Jrad Abir, Dhaoui Mohamed, Sarris Apostolos, Gabtni Hakim, Papadopoulos Nikos

Acta Geophysica

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2024

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Vol. 72, no. 2

1251--1256

EN

The 4th Atlas Georesources International Congress (AGIC), convened in Hammamet, Tunisia in March 2023, provided a significant forum for scholars, scientists, and practitioners to converge and deliberate on the intricate challenges surrounding resource management. Themed “Geoscience Innovations For Resource Management: Socio-Economic Challenges In An Environmentally Constrained World,” the congress spotlighted five pivotal domains: hydrology and water resource management, applied geophysics in geological exploration and structural analysis, environmental pollution, climate and atmospheric studies, and renewable energy and climate modeling. These thematic areas serve as focal points for grappling with the multifaceted challenges posed by contemporary resource management paradigms.