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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"humics"”.
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THE INFLUENCE OF FULVIC ACID ON COPPER(II), CADMIUM(II) AND ZINC(II) REMOVAL FROM DRINKING WATER BY ALUM COAGULATION AND COPPER(II) AND CADMIUM(II) COMPLEXING CAPACITY MEASUREMENTS OF FULVIC ACID AND NATURAL FRESHWATER SAMPLES BY DIALYSIS TITRATION
… in this dissertation. These ligands, called humics as a class, were modelled in some cases by a soil-derived humic material called fulvic acid. The role of natural humics in the transport and speciation of dissolved metal ions in drinking water sources, particularly health hazards like …
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Investigating nitrate-dependent humic substance oxidation and in-service K-12 teachers' understanding of microbiology
… and studied in recent years, the mechanism of humics metabolism and its interaction in the natural environment are not well understood. However, it is known that the continuous change in the redox state of HS is important to the cycling of iron, stability of nitrogen and carbon, and the …
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Analysis of water quality problems in the VPI & SU Duck Ponds and suggested management alternatives
… properties of the water, such as alkalinity and humics, a copper sulfate dose of 13.6 kg was determined to be a safe and effective dose that reduced algal densities but did not result in any visible adverse effects upon other aquatic life. Both of the pond management schemes were designed to aid …
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Extracellular Electron Shuttle Mediated Biodegradation of Hexahydro-1,3,5-trinitro-1,3,5-triazine
… stimulated RDX reduction with raw humics extract from commercial mulch and military smoke dye, suggesting that these quinone-containing compounds could be an alternative source of electron shuttling compounds for in situ application.
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Role of extracellular polymeric substances and metals in fouling of membranes in the wastewater treatment
… samples) although the molecular weight of the humics fraction was demonstrated to be below the molecular weight cut-off of the membrane. Fatty acids (FA) of microbial origin (C16:0, C18:0) were the dominating FA in EPS of activated sludge flocs, sludge supernatant, permeate and membrane fouling …
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A study on the water chemistry and plankton in blackwater lakelets of the south-western Cape
… sediments, primary production and the levels of humics. Chlorophyll a levels indicated low phytoplankton biomass in Suurdam, Gillidam and Grootrondevlei (Suurdam, mean chlorophyll a = 0.9ug1-¹ ) and no distinct seasonality; intermediate levels in Sirkelsvlei (mean chlorophyll a = 11.6ug1-¹ ) and …