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Evaluation of Biosurfactant Production Capabilities in Bacterial Strains Isolated from Oil-Contaminated Soil

Mahdi Abdulwahhab Jasim, Al-Kalidy Saad Kadhim Ala Allah, Al Shubaily Iman Ismaeel Jaseem

Ecological Engineering & Environmental Technology

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2024

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Vol. 25, iss. 3

9--20

EN

This study aims to investigate the biosurfactant production capabilities of bacterial strains isolated from oil-contaminated soil samples. Employing a comprehensive methodological approach, we collected soil samples from thirty different fuel pumps and conducted an extensive screening of bacterial isolates using various tests such as hemolytic activity, emulsification index, blue agar plate method, and drop collapsing test. The results revealed significant biosurfactant production among certain isolates, specifically highlighting the effectiveness of two particular strains. This paper presents a detailed analysis of these strains, including their optimal growth conditions in terms of pH, temperature, carbon, and nitrogen sources. Our findings indicate a notable potential of these bacterial strains in biosurfactant production, with implications for environmental bioremediation, particularly in oil pollution contexts. The study also sheds light on the limitations encountered and underscores the originality of the research in exploring biosurfactant production in a novel context. This study contributes to the field by offering insights into the effective utilization of microbial strains for biosurfactant synthesis, which is crucial for sustainable and eco-friendly bioremediation practices.

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Modelling Regional Sustainable Development in Ukrainian Crisis and War

Shevchuk Olena, Ilyash Olha, Mazhara Glib, Roshchyna Nadiia, Hrynkevych Svitlana, Lavrov Ruslan, Kozlovskyi Serhii

Problemy Ekorozwoju

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2023

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Vol. 18, nr 1

37--50

EN

The article investigates the impact of force majeure crisis factors that appeared in the Ukrainian economy as a result of the global recession, the events of 2014-2021: annexation of Crimea, temporary occupation of part of the industrial territories of Donetsk and Luhansk regions, military operations in Donbas, during the fight against pandemic (COVID-19) and war in 2022 on the stable development of regions. Based on the analysis of official indicators of the State Statistics Service of Ukraine, it was proved that the said factors create additional multiplier and acceleration effects that adversely affect the dynamics of the gross regional product in the crisis conditions. It has been determined that the result of these effects is the transformation of crisis signals from a proactive to an active phase. The construction of a heat map of GRP correlation indicators made it possible to determine the existence of a disbalance between the economic and social development of the regions. Building a model of linear regression, allowed us to draw conclusions about the existing disbalance of GRP regions during the crisis and war.

PL

Artykuł bada wpływ czynników kryzysowych o charakterze siły wyższej, które pojawiły się w ukraińskiej gospodarce w wyniku globalnej recesji, wydarzeń z lat 2014-2021: aneksja Krymu, tymczasowa okupacja części terenów przemysłowych obwodów donieckiego i ługańskiego, wojskowe operacje w Donbasie, walka z pandemią (COVID-19) i wojny w 2022 r. Na podstawie analizy oficjalnych wskaźników Państwowej Służby Statystyki Ukrainy wykazano, że czynniki te tworzą dodatkowy mnożnik efektów akceleracyjnych, które niekorzystnie wpływają na dynamikę produktu regionalnego brutto w warunkach kryzysowych. Stwierdzono, że skutkiem tych efektów jest przekształcenie sygnałów kryzysowych z fazy proaktywnej w aktywną. Konstrukcja wskaźników korelacji mapy cieplnej GRP pozwoliła na stwierdzenie istnienia dysproporcji między rozwojem gospodarczym i społecznym regionów. Zbudowanie modelu regresji liniowej pozwoliło na wyciągnięcie wniosków na temat istniejącej dysproporcji regionów GRP w okresie kryzysu i wojny.

3

Ograniczenie wybranych środków produkcji w uprawie rzepaku ozimego: wyzwania i możliwości maksymalizacji plonu z zachowaniem aspektów ekologicznych

Fiedur Marcin, Królikowski Kamil, Jarecki Wacław

Polish Journal for Sustainable Development

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2023

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T. 27, cz. 2

15--22

PL

Badania przeprowadzone w sezonie 2021-2022 mają charakter wstępny, a ich celem było zwrócenie uwagi na korzyści wynikające z zachowywania aspektów ekologicznych w produkcji rolnej. W doświadczeniu porównano reakcję dwóch odmian rzepaku ozimego (Tigris, Riccardo KWS) na dwa poziomy intensywności uprawy oraz opłacalność zastosowanych zabiegów agrotechnicznych. Z przeprowadzonych badań wynika, że plon i skład chemiczny nasion był uzależniony od zastosowanej technologii uprawy. Korzystniejsze efekty ekonomiczne uzyskano z uprawy rzepaku ozimego na poziomie średnio intensywnym (A2), pomimo niższego plonu. Odmiana Tigris przewyższała badanymi parametrami odmianę Riccardo KWS F1. Wykazano, że w systemach uprawy mniej intensywnej zwiększa się efektywność wykorzystania użytych środków do produkcji co może przyczynić się do zmniejszenia negatywnego wpływu na środowisko naturalne.

EN

The research conducted in 2021-2022 is preliminary and its aim was to draw attention to the benefits of maintaining ecological aspects in agricultural production. The experiment compared the response of two varieties of winter rapeseed (Tigris, Riccardo KWS) to two levels of cultivation intensity and the profitability of the applied agrotechnical treatments. The research shows that the yield and chemical composition of seeds depended on the cultivation technology used. More favorable economic effects were obtained from growing winter rapeseed at a medium-intensity level (A2), despite the lower yield. The Tigris variety exceeded the Riccardo KWS F1 variety in the tested parameters. It has been shown that in less intensive cultivation systems, the efficiency of the use of production inputs increases, which may contribute to reducing the negative impact on the natural environment.

4

Global trends of the research on COVID-19 risks effect in sustainable facility management fields: a bibliometric analysis

Aladayleh Khaled Jameel, Al Qudah Shatha Mustafa Abdallah, Bargues José Luis Fuentes, Gisbert Pablo Ferrer

Engineering Management in Production and Services

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2023

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Vol. 15, no. 1

12--28

EN

This study used bibliometric analysis to investigate global research trends regarding the effect of COVID-19 risks in sustainable facility management fields. Between 2019 and 2021, the Scopus database published 208 studies regarding the effect of COVID-19 risks on sustainable facility control fields. VOSviewer software was used to analyse the co-occurrence of all keywords, and Biblioshiny software allowed getting the most relevant affiliation using the three-field plot. The results show the contribution by authors from 51 countries, and 73 keywords were identified and organised into six clusters, such as the effect of COVID-19 risks on human health, supply chain in construction projects and industry, disaster risk management in a changing climate, sustainable supply chain benchmarking, facility management and quality control, and, finally, sensitivity analysis & decision-making.

5

Sustainable and adaptable measures to address climate change in China: a strategic analysis in urban planning

Yang Xiaozhou

Acta Geophysica

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2023

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Vol. 71, no. 3

1449--1460

EN

Climate change is a global phenomenon impacting all countries. In order to mitigate against the impacts of climate change, it is necessary to take measures to minimise the impacts that will affect the human habitat especially the built environment in the future. In the light of the inequality of development over the world, including varying rates of economic growth, it will be difficult for developing countries to combat the effects of climate change due to the limited capital investment, varying levels of leadership and political commitment and technology levels. All the countries have to share responsibility for the historical and current global emissions of greenhouse gases originating from both developed and undeveloped countries. This studies the built environment and adapts the impacts to be increased in the climate change and this analysis the constraints the opportunities for managing impacts for human sustainability.

6

Biopolymer based stabilization of Indian desert soil against wind induced erosion

Dagliya Monika, Satyam Neelima, Garg Ankit

Acta Geophysica

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2023

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Vol. 71, no. 1

503--516

EN

Wind-induced soil erosion is a major global misfortune, which obliterates nearly one-third of worldwide soil. The windswept sand particles cover large areas including highways, and make the visibility vague. This results in accidents, damaged infrastructure, delayed fights, and various health issues. The erosive impact of the wind can be minimized by enhancing the intactness of the soil surface. There is a prerequisite to adopt viable measures to strengthen soil against wind erosion. There are certain nature-based solutions that can fortify soil against wind erosion and the application of biopolymers is one of them. The objective of this study is to examine the viability of non-toxic biopolymers for stabilizing desert sand by improving its erosion resistance property and strength. In the present experiment, three biopolymers, sodium alginate (SA), pectin (P), and acacia gum (AG), were used with 1, 2, and 3% concentrations for 1 and 0.75 PV as stabilizing agents. The treatment with biopolymers was performed either by surficial treatment (spraying or pouring of solution) or by mixing and compact method based on the viscosity of prepared biopolymer solutions. The biotreated sand samples were tested in a wind tunnel at varying wind speeds of 10, 20, and 30 m/s to assess sand erosion. Surface strengths were assessed by measuring compressive strength using a pocket penetrometer. Crust thickness measurement was performed to check the penetration depth of biopolymer solution and binding of sand particles. All three biopolymers with 1% concentration gave a feasible solution for erosion against wind and binding of particles through SEM analysis. SA and P could not be sprayed for 2 and 3% concentrations due to high viscosity. This solution is also not feasible for the field application. Simultaneously, AG with 2 and 3% concentration was highly soluble, less viscous, and gave more surface strength due to higher percentage of biopolymer concentration.

7

Evaluation the Effect of Adding Oil Shale Ash on the Compressive Strength of Concrete

Gougazeh Mousa

Advances in Science and Technology. Research Journal

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2022

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Vol. 16, no 4

130--137

EN

In the present study, the effect of cementing properties of oil shale ash on the compressive strength of the concrete mixtures produced from oil shale ash, cement, sand, and water was investigated. The used shale ash was produced by direct combustion at 830oC in a laboratory muffle furnace of the El-Lajjun oil shale. Based on the chemical composition of shale ash (OSA), it was concluded that this material consists of a high percentage of CaO which forms the properties of cement materials as well as the contents of SiO2, Al2O3, and Fe2O3 form the properties of pozzolanic materials. Oil shale ash (OSA) materials have diverse applications as alternative materials for the construction industry and construction technology to reduce environmental risks and achieve sustainability. The results showed that the pressed specimen with 40 wt. % OSA content, 50 wt. % sand content and 30% MW obtained the highest compressive strength of about 9.1 MPa after 28 days of hardening. The highest value of 28 days compressive strength for a compacted specimen containing 35 wt. % OSA and 35% MW were achieved with 12 MPa at a compaction pressure of between 25 and 30 MPa. High compressive strength values were found to be achieved in the compressed specimens by controlling mixing water. It is also indicated that the compressive strength increases as OSA content in the compressed specimen increases and increases as compaction pressure increases.