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can be used as fuels whereas the solid fraction has been tested as cost-competitive carbon-based adsorbents [ 1 – 3 ]. Other uses of solid fraction could be their direct addition to soils as biochar [ 4 – 6 ]. Obtention of biochar has two main

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Introduction Microbial biomass carbon is an important indicator of soil fertility and its determination is essential in ecological research and agriculture. The first method to be developed to determine soil microbial biomass

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Introduction Organic matter content is a critical factor of soil quality and an important regulator of CO 2 in the atmosphere. The dry combustion method of measuring soil organic carbon (SOC) concentration dates back to 1900

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water is frozen in the polar icecaps. The remaining water is mainly present as soil moisture or in subterranean aquifers. Less than 1% of the fresh water resources of the world are readily available for human use [ 1 ]. In the “blue planet”, 1000

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applied to examination of solid waste and sludge and their influence on the soil. When compared to the situation 20 years ago [ 3 ], an enormous methodological progress and a significant extension of the research scope may be noticed. The discussed methods

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α-Cypermethrin is a synthetic pyrethroid insecticide used to control insects. In soil, α-cypermethrin biodegrades relatively slowly under both aerobic and anaerobic conditions. A high-performance thinlayer chromatography (HPTLC) method was developed for the determination of α-cypermethrin from soil by microwave-assisted extraction (MAE). The linearity range was between 12.5 and 1000 ng/spot, the limit of detection was 2.1 ng/spot, the limit of quantification was 6.4 ng/spot, and the recovery was 91%. The reported method was found to be sensitive, rapid, and suitable for the analysis of α-cypermethrin in soil and it was successfully applied to the soil samples collected from a treated agricultural field. α-Cypermethrin was detected in all soil samples at concentrations ranging from 78.9 to 708.7 ng g−1.

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The paper presents the results of studies of phosphate anion sorption on various types of soil taken up from the Lublin Province (Poland). Anions belong to the group of ions witch undergo insignificant sorption according to the soil science. As follows from the studies anion sorption depends insignificantly on pH. Sorption isotherms can be described using the Freundlich equation. Sorption extent depends on concentration of iron ions and organic substances in the sample. Specific sorption (chemisorptions) plays the greatest role in the process under investigation.

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Soil samples were collected from two small agricultural fields located in Médanos and Hilario Ascasubi, Bahía Blanca, Argentina and analyzed for Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Na, Rb, Sc, Th, U, Yb, and Zn by instrumental neutron activation analysis (INAA). In order to evaluate the contribution of anthropogenic sources and the similarity/dissimilarity between the samples, the database was studied by means of enrichment factors (EF) and discriminant analysis (DA), respectively. In addition to identifying redundant variables without losing essential information, the data set was studied using forward stepwise discriminant analysis.

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The purpose of this study was to test a method for 99Tc determination in soil samples from locality Bratislava Podunajske Biskupice by using solid phase extraction technique with a new sorbent AnaLig® Tc-02—molecular recognition technology product. The method is suitable for analyzing soil samples in a relatively short time and high recoveries. The use and effectiveness of AnaLig® Tc-02 were successfully tested by analysis of soil and spiked soil samples.

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Abstract  

This study was conducted to investigate the effect of time on cadmium (109Cd) availability in four typical soils of the Danubian Lowland through the modified Tessier’s sequential extraction procedure as well as its short-term sorption in the bulk soils and their two grain-size fractions. Results of the fractionation study showed that there were significant changes in the proportional distribution of cadmium in all studied soils during 180 days of incubation with spiked cadmium. Generally, the proportions of cadmium associated with the most weakly bound fractions (water soluble and exchangeable) tended to decrease with corresponding increases in the residual fraction during the incubation. The extent of cadmium sorption in all studied soils was high, exceeding 95% of the spiked amount after 60 min of incubation, likely due to slightly alkaline character of the soils. The finding that soil particles less than 10 μm sorbed up to 51% of the spiked cadmium in soils is of great importance since they could play a role in colloid-facilitated transport of cadmium through preferential pathways, as previously observed in the region. Addition of 1 M ammonium nitrate into the soil solution generally decreased cadmium sorption in all four soils. The lowest extractabilities of Cd were obtained using 1 M ammonium nitrate as a single extractant, whereas 0.025 M ammonium ethylenediaminetetraacetate solution extracted the highest proportions of cadmium from the studied soils.

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