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1

Impact of Extensive Sheep Grazing on the Biochemical Status of Soils of the Grassland Habitat of Natura 2000

Futa Barbara, Trzcińska Joanna, Patkowski Krzysztof

Journal of Ecological Engineering

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2024

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Vol. 25, nr 1

256--268

EN

Abandonment of the use of agricultural areas, especially low-production grass communities, and the related secondary succession of trees and shrubs, affects the transformation of the soil environment. The work focused on the impact of extensive sheep grazing on activity of dehydrogenases (DhA) and neutral phosphatase (PhA) and the resources of total organic carbon (TOC) and available phosphorus (Pav) in the soils of meadow habitats in eastern Poland. These habitats are located within the ecological network Natura 2000: PLH060018 Stawska Góra, PLH060035 Zachodniowołyńska Dolina Bugu, PLH060010 Kąty and the Nature Reserve "Kózki" (PLB140001 Dolina Dolnego Bugu and PLH140011 Ostoja Nadbużańska). Soil material was collected for three years, twice each year: before and after the grazing. In the soils of all the studied habitats, a beneficial effect of extensive sheep grazing on soil enzymatic activity and TOC and Pav content was noticed. A particular marked improvement was observed in the biochemical status of the soil in the study area where sheep grazing was continued since 2008. This confirms the hypothesis that free grazing of livestock has a positive impact on biodiversity and the condition of the soil environment of Natura 2000 habitats.

2

Organosolv lignin particles as an ecological reagent in the Kupfershiefer copper ore flotation

Witecki Kajetan, Szkurat Monika, Hruzova Katerina

Physicochemical Problems of Mineral Processing

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2023

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Vol. 59, iss. 6

art. no. 174363

EN

Mineral separation relies heavily on the process of flotation. This study explored the feasibility of using organosolv lignin nanoparticles and microparticles (OLP) as a greener alternative to xanthates in the flotation process for mineral separation. Xanthates are widely used but pose environmental and health risks. The efficiency of OLP as collectors was compared to collectorless flotation, resulting in approximately 50% copper recovery, indicating that OLP may not be a suitable replacement for xanthates. Further tests were conducted using a mixture of xanthates and OLP (birch nano and spruce micro) with varying substitution levels (20%, 30%, and 40%). The results demonstrated that increasing the dosage of OLP led to a decrease in flotation efficiency for copper. TOC analysis of the products revealed that high dosages (160 g/t) of birch nano and spruce micro as sole collectors showed beneficiation and selective recovery against copper. While OLPs did not prove effective as collectors, the study highlights their potential as substitutes for maltodextrin in selective flotation of the final concentrate. Two out of four tested OLPs were recommended for pilot scale testing.

3

Systemowe podejście do bezpieczeństwa wody w MPECWiK w Środzie Wielkopolskiej z uwzględnieniem generowania ubocznych produktów dezynfekcji wody

Zimoch Izabela, Górska Aleksandra

Instal

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2023

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nr 10

27--32

PL

Dezynfekcja jest jednym z głównych etapów uzdatniania wody, pozwalającym zachować bezpieczeństwo mikrobiologiczne. Niesie ona jednak za sobą ryzyko powstawania ubocznych produktów w wodzie, które w dłuższym okresie spożywania może stanowić zagrożenie dla zdrowia ludzi. Istnieje wiele metod umożliwiających zmniejszenie poziomu powstawania ubocznych produktów dezynfekcji (UPD) w zależności od rodzaju i jakości ujmowanej wody, niemniej jednak procesu tego nie da się w pełni wyeliminować w systemach o dużym potencjale ich generowania. Zarówno konieczność zapewnienia bezpieczeństwa mikrobiologicznego wody jak i konieczność ograniczania powstawania ubocznych produktów stawia dezynfekcję jako proces technologiczny o szczególnym znaczeniu w procedurach zarządzania bezpieczeństwem dostaw wody do konsumenta. Na przykładzie Miejskiego Przedsiębiorstwa Energetyki Cieplnej, Wodociągów i Kanalizacji Spółka z o.o. w Środzie Wielkopolskiej w artykule przedstawiono proces identyfikacji zagrożeń wynikających z powstawania UPD oraz działania zmierzające do zminimalizowania lub wyeliminowania tego zagrożenia. W związku z powyższym w Spółce przeprowadzono wstępne badania, które wykazały skuteczność zastosowania koagulacji celem ograniczenia potencjału tworzenia UPD w uzdatnianej wodzie. W działaniach tych wykorzystano systemowe podejście do bezpieczeństwa wody oparte na ocenie i zarządzaniu ryzykiem. Celem przeprowadzonych badań była analiza potencjalnego zagrożenia występowania UPD w wodzie przeznaczonej do spożycia przez ludzi oraz ocena efektywności technologicznej koagulacji jako skutecznej bariery ochronnej w zarządzaniu ryzykiem.

EN

Disinfection is one of the main parts of water treatment processes, allowing to maintain microbiological safety. However, it carries the risk of the formation of by-products in the drinking water, which in the long term, may pose a threat to consumer health. There are many methods to reduce the level of disinfection by-products (DBP) formation, depending on the type and quality of water abstraction. However, this process cannot be fully eliminated in water supply systems with a high potential for their generation. Both the need to ensure the microbiological safety of tap water and the need to reduce the formation of DBP make disinfection a technological process of particular importance in the procedures of managing the safety of water delivered to consumers. On the example of Municipal Heat Energy, Water Supply and Sewage Company Ltd in Środa Wielkopolska city, the article presents the process of identifying threats resulting from the creation of UPD and actions aimed at minimizing or eliminating this threat. In connection with the above, preliminary studies were carried out at the Company, which showed the effectiveness of using coagulation to reduce the potential of UPD formation in the treated water. These activities used a systemic approach to water safety based on risk analysis and management. The aim of the study was to analyze the potential risk of UPD formation in water intended for human consumption and to assess the technological effectiveness of coagulation as an effective protective barrier in risk management.

4

Tillage, Residues Management, and Nitrogen Fertilization Effects on Soil Organic Status, Soil Quality, and Soft Wheat in the Moroccan Semi-Arid

Et-Tayeb Hiba, Ibno Namr Khalid, El Mzouri El Houssine, El Bourhrami Bouchra, Moussadek Rachid

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 2

173--184

EN

Sustainable management of agricultural practices can improve soil organic status, soil quality (SQ), and yields. The study was conducted to test the impact of tillage (conventional (CT) and no-till (NT)), residues (vetch (C1) and uncover soil (C0)), and three nitrogen (N) fertilization rates (30, 60, and 90 N kg ha-1) on soil organic carbon (SOC), total nitrogen (N), C/N ratio, soft wheat yields and SQ. The experiment was established in 2010 in the Moroccan semi-arid. After ten years, the SOC concentration was greater under NT (9.4 g/kg) compared to CT (8.4 g/kg). Crop residues also enhanced SOC (10 g/kg) contrary to C0 (8.1 g/kg). Application of N fertilization showed profound effects on total N, increasing levels of N fertilization led to higher total N irrespective of tillage. Crop residues increased total N (0.6 g/kg) better than C0 plots at the horizon 20–40 cm. Soft wheat revealed an improvement under NT (4213.8 kg ha-1) versus CT (3785.6 kg ha-1) and it responded positively to the N application. For SQ evaluation through the indexing methods (SQI), principal component analysis was done for eight soil indicators to select the minimum data set (MDS), which were subsequently normalized and integrated into the SQI, additive (SQIANL), and weighted (SQIWNLM). NT revealed higher scores (0.52; 0.6) than the CT (0.46; 0.53) for SQIANL and SQIWNL, respectively, at the horizon 0–20 cm. the residues layer on the soil surface improved SQIWNL score (0.59) compared to C0 (0.55). Moreover, the correlation (r) with yield and the sensitivity (S), allowed us to choose SQIWNL, as the best index (highest r and S) to evaluate SQ under different practices studied. Indeed, SQIWNL revealed an intermediate SQ under NT and at C1 treatments, compared to CT and C0 (low SQ).

5

Petrographic characteristics of the Ordovician and Silurian deposits in the Baltic Basin (N Poland) and their relevance for unconventional hydrocarbon accumulations

Kuberska Marta, Sikorska-Jaworowska Magdalena, Kozłowska Aleksandra, Podhalańska Teresa

Geological Quarterly

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2021

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Vol. 65, No. 3

art. no. 44

EN

The Ordovician and Silurian deposits in the Baltic Basin are represented by siltstones, mudstones, limestones, marls, sandstones and, most commonly, claystones with a markedly shaley structure. Claystones that are particularly rich in organic matter are considered as potential reservoirs for shale gas accumulations. Samples from 11 boreholes, including core samples of the Piaśnica, Słuchowo, Kopalino, Sasino, Prabuty, Jantar, Pelplin and locally Pasłęk, Kociewie and Puck formations, were analysed by optical microscopy, cathodoluminescence (CL), scanning electron microscopy (SEM) and energy-dispersive spectrometry and X-ray diffraction analyses (XRD). The Piaśnica, Sasino, Jantar, Pasłęk and Pelplin formations are characterized locally by a dominance of black bituminous claystones with a high content of organic matter, and a generally consistent clay mineral composition. Individual samples only show variations in silt fraction and carbonate content. Very important is the negligible proportion of swelling minerals in the clay fraction; the percentage of smectite in the mixed-layered illite/smectite minerals does not exceed 15%. It is important for the rocks to have adequate [SiO2 >10%; Quartz (Q) + Feldspars (Fs) + Carbonates >40%] brittleness. The content of quartz, feldspars and carbonates (here >40%) suggests that the claystones are susceptible to hydraulic fracturing. The claystones show micropores between detrital grains, between the flakes of clay minerals, within pyrite framboids, and organic matter and secondary micropores within grains.

6

Valorisation of sewage sludge humic compounds in the aspect of its application in natural environment

Jakubus Monika, Bakinowska Ewa, Tobiašová Erika

Environment Protection Engineering

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2021

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Vol. 47, nr 1

67--83

EN

The valorization of sewage sludge (SS) has been presented originating from four wastewaters treated in wastewater treatment plants (WWTPs) located in the Wielkopolska province. In the SS samples collected in two successive years, the quantity and quality of humic substances (HSs), fulvic and humic acids (FAs, HAs), amounts of organic carbon (TOC), organic matter (OM), labile carbon (CL), and water extracted organic carbon (WEOC) were determined. It was investigated how the defined parameters depend on the size of the installation and select those which in a routine SS analysis facilitate rapid assessment of their quality and suitability for application in the natural environment. Regardless of WWTP size and the year of analysis, SS was characterized by a significant share of easily decomposable compounds such as FAs and WEOC. The statistical analysis showed significant usefulness of CL, FAs, and HAs in the evaluation of SS quality and usability.

7

Evaluation of total organic carbon quantity and emissions of CO2 from soil into the atmosphere near street

Pranskevicius Mantas, Paliulis Dainius

Ecological Chemistry and Engineering. S

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2021

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Vol. 28, nr 3

399--410

EN

Soil as an ecosystem is actively involved into climate formation process. Therefore, it is important to assess such soil quality indicators as total organic carbon (TOC) and CO2 emissions. Soil organic matter is considered to be its indicator of quality, which is one of the most important components of biosphere consistency and stability. Soil respiration shows carbon emission from soil into the atmosphere. This is a great indicator, illustrating soil biological activity. Impact of soil temperature, air humidity, time of day was evaluated on CO2 emission from the soil. The highest CO2 emission is observed in afternoon hours, up to 0.201 g CO2·m–2·h–1.

8

Effect of Thermal and Alkaline Disintegration of Excess Sludge on Biodegradation

Zawieja Iwona

Journal of Ecological Engineering

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2019

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Vol. 20, nr 10

172--182

EN

Thermal methods of sludge disintegration can be divided into high temperature (over 100°C) and low temperature (below this temperature). They consist in the supply or removal of thermal energy, contributing to the changes in sludge structure and physicochemical properties. During the chemical disintegration of excess sludge with sodium hydroxide, there is an increase in the pH value, as well as changes in their structure. The OH- ions are highly toxic to the microorganisms living in the excess sludge and affect the decline of biological activity of most microorganisms. The aim of the conducted research was to prove the impact of the thermal and alkaline disintegration of excess sludge on the susceptibility of organic substances to biodegradation. The thermal disintegration of excess sludge was carried out in a shaking water bath, in which the sludge placed in laboratory flasks with an active volume of 0.5 L were heated for a specified period within the scope of the so-called low temperatures, i.e. 65–95 °C. The sludge was heated for a period of 0.5–12 h. The alkaline disintegration of the sludge was carried out with sodium hydroxide in the form of dust at ambient temperature, in sealed plastic bottles with an active volume of 5L, the contents of which were mixed manually every few hours. The regent doses in the range of 0.05–1.3 g NaOH/g VSS and disintegration time 12h were used. As a result of subjecting the excess sludge to disintegration by means of the selected methods, an increase in the concentration of organic substances in the dissolved form in the supernatant liquid was noted. On the basis of the increase in SCOD, TOC value and VFAs concentration, the most favorable modification conditions were determined. As a result of disintegration of the sludge and subsequent methane fermentation, the supporting effects of the applied modification methods were observed, in relation to the conventional methane fermentation of excess sludge.

9

Unconventional hydrocarbon prospects in Ordovician and Silurian mudrocks of the East European Craton (Poland) : Insight from three-dimensional modelling of total organic carbon and thermal maturity

Papiernik Bartosz, Botor Dariusz, Golonka Jan, Porębski Szczepan J.

Annales Societatis Geologorum Poloniae

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2019

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Vol. 89, No. 4

511-- 533

EN

Three-dimensional, structural and parametric numerical modelling was applied to unravel the unconventional hydrocarbon potential of a W-dipping, Lower Palaeozoic mudrock succession, which subcrops for some 700 km in the Baltic, Podlasie and Lublin basins across the SW margin of East European Craton in Poland. Input data comprised structural and thickness maps of Ordovician and Silurian strata and the results of thermal maturity (mean vitrinite-equivalent reflectance, % Ro) and total organic carbon (TOC, % wt.) modelling. A new, spatial interpretation of vitrinite-reflectance variability indicates that the regional, W-increasing thermal maturity pattern breaks into a series of domains, bounded by abrupt maturity variations. In total, 14 tectono-thermal domains were recognised and their boundaries traced to known and inferred faults, mostly of NW‒SE and NE‒SW orientations. On the basis of a combination of thermal maturity and total organic carbon levels (0.6% > Ro<2.4%, and TOC >1.5% wt.), good-quality, unconventional reservoirs can be expected in the Sasino Formation (Caradoc) and Jantar Formation (early Llandovery) in the central and western Baltic Basin. The Jantar Formation also is likely to be prospective in the western Podlasie Basin. Marginal-quality reservoirs may occur in the Sasino and Jantar formations within the Podlasie and Lublin basins and in the Pasłęk Formation (late Llandovery) across all basins. Poor- to moderate-quality, unconventional reservoirs could be present in the Pelplin Formation (Wenlock) in the Lublin and southern Podlasie basins. In spite of a considerable hydrocarbon loss during multiphase basin inversion, the Ordovician and Silurian mudrocks still contain huge quantities of dispersed gas. Successful exploitation of it would require the adoption of advanced fracking methods.Lower Palaeozoic, shale gas, shale oil, Baltic Basin, Lublin-Podlasie Basin, total organic carbon, thermal maturity, structural-parametric model.

10

Effect of Dry Ice Modification of Excess Sludge on the Methane Fermentation Process

Zawieja I.

Rocznik Ochrona Środowiska

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2018

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Tom 20, cz. 1

558--573

EN

The specific susceptibility of excess sludge to the methane fermentation process is a limiting factor for the rate of reaction occurring in the subsequent stages of the process. The kinetics of biochemical changes during spontaneous methane fermentation phases is directly influenced by the increase in the concentration of dissolved organic substances available to microorganisms in the process. Excess sludge deposition by different disintegration methods, ie: chemical, physical, combined increases the efficiency of the methane fermentation process. Among the modifications mentioned above, the advantages of physical methods, especially of thermal nature, should be emphasized. In addition to the significant modification of the excess sludge structure, it does not cause secondary contamination of the prepared sludge and therefore is a promising technological solution. The aim of the study was to determine the effect of dry ice disintegration on the susceptibility of excess sludge to biodegradation. Volatile fatty acids are an important intermediate product in methane fermentation and increased effects of the stabilization process is conditioned by their concentration. Since the phase limiting process is the hydrolysis phase, the first stage of the fermentation, the detailed analysis was carried out in the first eight days of the process by performing physicochemical determinations of the modified sludge. Periodic fermentation was carried out under mesophilic conditions. Excess sludge was prepared with dry ice in a volume ratio of dry ice to excess sludge in range from 0.05L-1 to 0.75L-1. Confirmation of the increased susceptibility of the prepared excess sludge to the methane fermentation process was a modification of the sludge structure expressed by the increase of the disintegration degree. For sludge subjected to disintegration with dry ice, using the most preferred reagent dose, in the following days of the methane fermentation process, in relation to methane fermentation of non-prepared excess sludge, increase of SCOD and TOC values as well as VFAs concentration was noted.

PL

Specyficzna podatność osadów nadmiernych na proces fermentacji metanowej jest czynnikiem ograniczającym szybkość reakcji zachodzących w kolejnych etapach procesu. Na kinetykę przemian biochemicznych podczas zachodzących samorzutnie faz fermentacji metanowej wpływa bezpośrednio wzrost stężenia rozpuszczonych substancji organicznych dostępnych dla mikroorganizmów procesu. Modyfikacja osadów nadmiernych odmiennymi metodami dezintegracji, tj. chemicznymi, fizycznymi, hybrydowymi zwiększa efektywność procesu fermentacji metanowej. Spośród wymienionych powyżej metod modyfikacji należy podkreślić zalety metod fizycznych, zwłaszcza termicznych. Oprócz istotnej modyfikacji struktury osadów nadmiernych, nie powodują one wtórnego zanieczyszczenia preparowanych osadów i stanowią obiecujące rozwiązanie technologiczne. Celem przeprowadzonych badań było określenie wpływu dezintegracji osadów nadmiernych suchym lodem na wzrost podatność na biodegradację. Lotne kwasy tłuszczowe są ważnym produktem pośrednim fermentacji metanu, a zwiększona wydajność procesu stabilizacji zależy od ich stężenia. Ponieważ procesem limitującym fermentacje metanową jest faza hydrolizy, pierwszy etap stabilizacji, dokonano analizy wybranych oznaczeń fizyczno-chemicznych w ciągu pierwszych ośmiu dób procesu fermentacji modyfikowanych osadów Okresową fermentację metanową prowadzono w warunkach mezofilowych. Stworzono mieszaniny suchego lodu i osadów nadmiernych w stosunku objętościowym reagenta do osadów w zakresie od 0,05/1 do 0,75/1. Potwierdzeniem zwiększonej podatności dezintegrowanych osadów nadmiernych na proces fermentacji metanowej był zachodzący proces lizy osadów nadmiernych wyrażony wzrostem stopnia dezintegracji. W przypadku osadów nadmiernych poddanych dezintegracji suchym lodem, przy użyciu najkorzystniejszej dawki reagenta, w kolejnych dobach procesu fermentacji metanowej, w odniesieniu do fermentacji metanowej niepreparowanych osadów nadmiernych, odnotowano wzrost wartości rozpuszczonego chemicznego zapotrzebowania na tlen (ChZT), ogólnego węgla organicznego (OWO) oraz stężenia lotnych kwasów tłuszczowych (LKT).

11

Using Sawdust to Treat Synthetic Municipal Wastewater and Its Consequent Transformation Into Biogas

Abudi Z. N.

Journal of Ecological Engineering

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2018

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Vol. 19, nr 5

10--18

EN

Sawdust, as an agricultural waste which is highly efficient, readily available, and relatively inexpensive, has the potential to be an applicable alternative adsorbent for the total organic carbon (TOC) removal from synthetic domestic wastewater. This study aims firstly to investigate the feasibility of sawdust as a new adsorbent and understand its adsorption mechanism for TOC. The impact of particle size, pH, contact time, and temperature has been evaluated as the controlling factors on the adsorption process. The results presented that the removal efficiency rose with the decrease of particle size, pH, and temperature, as well as the increase of the contact time. The maximum adsorption was obtained at particle size of 0.05 mm, pH of 1, contact time of 1.5 h, and temperature of 15°C, respectively. The second aim of this study is to utilize the sawdust that is used in the adsorption process as biomass in batch anaerobic digestion (AD) to produce methane. Spent sawdust was characterized by the methane production which was 5.9 times greater than in the case of raw sawdust. Four operating parameters were checked, Carbon/Nitrogen ratio (C/N), inoculation, particle size, and total solid (TS) content. The batch results indicated that the optimum parameters were: 20%, 30%, 2 mm, and 15%, respectively.

12

Kondycjonowania falami ultradźwiękowymi, a stężenie wybranych wskaźników w odcieku z odwadniania osadów ściekowych

Skarżyński S., Bartkowska I.

Gaz, Woda i Technika Sanitarna

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2018

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Nr 6

219--222

PL

W niniejszym artykule przedstawiono wyniki badań wybranych wskaźników zanieczyszczeń odcieku z odwadniania osadów ściekowych poddanych procesowi kondycjonowania falami ultradźwiękowymi. Wskaźnikami, na które zwrócono szczególną uwagę są związki biogenne (azot Kjeldahla i fosfor ogólny) oraz ogólny węgiel organiczny i zawiesina ogólna.

EN

This article presents the results of research on selected indicators of effluent from sewage sludge dewatering after applying on them the conditioning process using ultrasonic waves. The discussed indicators are biogenic compounds (Kjeldahl nitrogen and total phosphorus) and total organic carbon and total suspended solids.

13

Validation of method for determination total carbon, inorganic carbon and total organic carbon in marine waters

Nowogrodzka K., Dembska G., Galer-Tatarowicz K.

Biuletyn Instytutu Morskiego w Gdańsku

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2018

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Vol. 33, No. 1

212--217

EN

Validation is a process of setting parameters characterizing the proficiency of actions and limitations of a method and an assessment of its usefulness for particular purposes. As a result, it ensures that the analysis process is carried out in a reliable and precise way and gives reliable results. For the validation process marine water was used, as well as the addition of standard solutions. Uncertainty in the results, limit of quantification, precision, repeatability and reproducibility, recovery and accuracy of the method were obtained. The results of the validation of the method for determination of total inorganic and organic carbon in marine waters are discussed in this paper. For this purpose, a Shimadzu analyser TOC-L was used. The discussed method is based on infrared detection NDIR. A halogen scrubber type B was used for determined the compounds. This allowed the analysis time at the stage of the sample preparation to be shortened. It increased the absorption of salt contained in a sample, as a result of which, the dilution stage could be omitted, and the final result is affected by a smaller error. The method of the validation for determination of total inorganic and organic carbon received accreditation of the Polish Centre for Accreditation and joined a wide range of the analyses carried out in the Laboratory of the Department of Environment Protection of the Marine Institute in Gdańsk.

PL

Walidacja jest procesem ustalania parametrów charakteryzujących sprawność działania i ograniczeń metody oraz sprawdzeniem jej przydatności do określonych celów. W efekcie można uzyskać pewność, że proces analizy przebiega w sposób rzetelny i precyzyjny oraz daje wiarygodne wyniki. Do procesu walidacji wykorzystano wodę morską, a także tą samą wodę z dodatkami wzorców. Walidacja metody pozwoliła na określenie takich parametrów, jak: niepewność wyników, granica oznaczalności, precyzja, powtarzalność i odtwarzalność, a także odzysk i dokładność metody. W niniejszej pracy omówione zostały wyniki walidacji metod oznaczania węgla całkowitego, nieorganicznego i organicznego w próbkach wody morskiej. W tym celu wykorzystano analizator TOC-L firmy Shimadzu. Omawiana metoda polega na detekcji w podczerwieni NDIR. Do przeprowadzenia badań zastosowano skruber halogenów typu B. Pozwolił on na skrócenie czasu analizy na etapie przygotowania próbki. Zwiększył on pochłanianie soli zawartej w próbce, w wyniku czego można było pominąć etap rozcieńczania, a wynik końcowy obarczony jest mniejszym błędem. Metoda oznaczania węgla całkowitego, nieorganicznego i organicznego uzyskała akredytację Polskiego Centrum Akredytacji i dołączyła do szerokiego grona analiz wykonywanych w Laboratorium Zakładu Ochrony Środowiska Instytutu Morskiego w Gdańsku.

14

Application of Multiboost-KELM algorithm to alleviate the collinearity of log curves for evaluating the abundance of organic matter in marine mud shale reservoirs: a case study in Sichuan Basin, China

Zhu L., Zhang C., Zhang C., Zhou X., Wang J., Wang X.

Acta Geophysica

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2018

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Vol. 66, no. 5

983--1000

EN

The total organic carbon (TOC) content reflects the abundance of organic matter in marine mud shale reservoirs and reveals the hydrocarbon potential of the reservoir. Traditional TOC calculation methods based on statistical and machine learning have limited effect in improving the computational accuracy of marine mud shale reservoirs. In this study, the collinearity between log curves of marine mud shale reservoirs was revealed for the first time, which was found to be adverse to the improvement of TOC calculation accuracy. To this end, a new TOC prediction method was proposed based on Multiboost-Kernel extreme learning machine (Multiboost-KELM) bridging geostatistics and machine learning technique. The proposed method not only has good data mining ability, generalization ability and sound adaptivity to small samples, but also has the ability to improve the computational accuracy by reducing the effect of collinearity between logging curves. In prediction of two mud shale reservoirs of Sichuan basin with proposed model, the results showed that the predicted value of TOC was in good consistence with the measured value. The root-mean-square error of TOC predicting results was reduced from 0.415 (back-propagation neural networks) to 0.203 and 1.117 (back-propagation neural networks) to 0.357, respectively; the relative error value decreased by up to 8.9%. The Multiboost-KELM algorithm proposed in this paper can effectively improve the prediction accuracy of TOC in marine mud shale reservoir.

15

Assessment of soil phosphatase activity, phosphorus and heavy metals content depending on the mineral fertilization

Lemanowicz J., Bartkowiak A.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2016

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Vol. 25, No. 2

116--129

EN

The paper presents the results of research into the activity of alkaline and acid phosphatase, the content of available phosphorus, heavy metals and total organic carbon, against in soil with mineral fertilization only. The first experimental factor was phosphorus, potassium, magnesium, calcium and sulphur fertilization in six fertilizer combinations: 1: (PKMgCaS), 2: (KMgCaS), 3: (PMgCaS), 4: (PKCaS), 5: (PKMgS), 6: (PKMgCa). The second factor was made up of nitrogen fertilization at the rates of: 0, 50, 100, 150, 200, 250 kg·ha-1 of N. Increasing nitrogen rates and a lack of liming increased the soil acidity inhibiting alkaline phosphatase, decreasing the content of available phosphorus in soil. A lack of phosphorus fertilization resulted in an intensive increase in the activity of both alkaline and acid phosphatase in soil. Due to the experimental factors applied, the content of the heavy metals assayed was as follows: zinc> copper> lead> cadmium.

PL

W pracy przedstawiono wyniki badań nad aktywnością fosfatazy zasadowej i kwasowej, zawartość przyswajalnego fosforu, metali ciężkich i węgla organicznego w glebie nawożonej wyłącznie mineralnie. Pierwszym czynnikiem doświadczenia było nawożenie fosforem, magnezem, wapniem i siarką w sześciu kombinacjach nawozowych: 1 (PKMgCa S), 2: (KMgCaS), 3: (PMgCaS), 4: (PKCaS), 5: (PKMgS), 6: (PKMgCa). Czynnikiem drugim - nawożenie azotem w dawkach: 0, 50, 100, 150, 200, 250 kg N·ha-1. Wzrastające dawki azotu i brak wapnowania spowodowały wzrost kwasowości gleby powodując inhibicje fosfatazy alkalicznej, zmniejszenie zawartości fosforu przyswajalnego w glebie. Brak nawożenia fosforem spowodował intensywny wzrost aktywności zarówno fosfatazy alkalicznej jaki i kwaśnej w glebie. Pod wpływem zastosowanych czynników doświadczalnych, zawartość metali ciężkich, kształtowała sie w sposób następujący: cynk> miedź> ołów> kadm.

16

Oznaczanie ogólnego węgla organicznego w wodach powierzchniowych

Nocoń W.

Laboratorium - Przegląd Ogólnopolski

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2007

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nr 4

24--27

PL

Oznaczanie ogólnego węgla organicznego w wodzie jest często wykonywane jako alternatywa w stosunku BZT i ChZT. Parametr ten jest określony w klasyfikacji czystości wód w Rozporządzeniu Ministra Środowiska z dnia 11 lutego 2004 r. Niniejszy artykuł omawia zagadnienia związane z oznaczeniem węgla całkowitego, nieorganicznego i organicznego w wodach powierzchniowych. Omówiono pobór i przygotowanie prób, kalibrację analizatora i oznaczenie trzech form węgla.

EN

The total organic carbon determination in water often is the alternative for BOD and COD. Total organic carbon concentration is valued in water purity classification in Disposition of Environmental Minister od 11th February, 2004. That article discusses question about total carbon and total organic carbon indication In surface water. Samples collection and preparation calibration of total organic carbon analyzer and three forms of carbon determination have been discussed.

17

Wpływ sposobów użytkowania łąk pobagiennych na jakość wód gruntowych na obiekcie Supraśl Górna

Kiryluk A.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2006

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Vol. 15, No. 2

181--188

EN

The researches executed on low peat land in valley Supraśl. It defi nited concentration of ammonium ions NH4 and nitrate ions NO3-. Ground waters contained higher concentration of ammonium ions to 1,75 mg NH4ּdm-3 and lower concentration nitrate ions 5,04 mg NO3ּdm-3. The concentration of total organic carbon TOC was enough high and amounts to 60,27 mg Cּdm-3. On the concentrations of these components in ground water have infl uenced mineralization of peat mainly and used methods of meadow in smaller degree.