Global ETD Search
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 10 of 10 for “"Freshwater samples"”.
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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
… removal experiment, and to filter natural water samples with no substantial metal ion losses due to wall effects or contaminations, a microfilter apparatus was assembled and evaluated. The apparatus has all plastic surfaces for solution contact and allows vacuum filtration directly into a …
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Investigations of and performance improvements in the mercury thiourea complex ion chromatography method for mercury speciation analysis
… and unexpectedly demonstrates the presence in freshwater samples of previously unknown Hg species with low net charge that are chemically different from both MeHg and HgII. In addition, it is shown that the system’s preconcentrator effectively traps both MeHg and HgII in samples containing …
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Dissolved organic nitrogen in the river test and estuary
… up to 152 µM were measured in saline samples and concentrations of up to 100 µM were recorded in freshwater samples from the River Test. DON was the second largest TN component, contributing up to 7 % of TN in the river and 13 % of TN in the upper Test estuarine waters.<br/><br/>DON …
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Evaluating the emerging environmental risks of mycotoxins in freshwater ecosystems.
… interest into the potential transference into freshwaters. Multiple reports of mycotoxin occurrence in freshwater samples have led to their consideration as natural chemicals of emerging concern, particularly with ZON seen to act in an oestrogenic nature, yet the ecotoxicological data to …
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Anti-aging potential of some freshwater microalgae extracts
… aimed to assess the anti- aging potential of freshwater microalgal extracts. Freshwater samples collected from the University of Zululand environment were enriched with BG-11 and cultured under UV illumination. Out of the ten (10) pure colonies isolated from the culture and characterised …
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THE DETERMINATION OF STABILITY CONSTANTS AND COMPLEXING CAPACITIES OF NATURAL ORGANIC MATTER FOR COPPER (2+), COBALT (2+) AND MANGANESE (2+) BY FLUORESCENCE QUENCHING TITRATION
… humic-chelated trace metal ions from water samples. Amine, dithiocarbamate and 8-hydroxyquinoline chelating agents immobilized on porous glass beads are compared to Chelex 100. In the presence of humic materials, modeled with isolated soil-derived fulvic acid (SFA), the removal of metal ions …
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The marine geochemistry of trace metals
… (±0.1). The technique may be applied to freshwater samples with slight modification. A survey of several east coast U. S. estuaries established that an iron removal process occurs commonly when rivers mix with seawater. Laboratory mixing experiments using water from the Merrimack River …
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Evidence for functional drift of bacterial isolates in response to cyanobacterial microcystin-lr and multiple peptide degradation in paucibacter toxinivorans.
… several bacteria were isolated from Scottish freshwaters that effectively degraded MCs. Rhodococcus sp. C1, among the biocatalytic isolates, exhibited particular catabolic capacities as it degraded a range of chemically and structurally diverse prokaryotic and eukaryotic peptides. The work …
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Electroanalytical chemistry for biological and environmental applications
… remediation studies to be undertaken, with river freshwater samples from North Yorkshire (54deg 15' 19.19" N, 1deg 46' 13.49" W) and the Rodalquilar mine, Spain, (36deg 50' 52.9" N, 2deg 02' 36.87" W) demonstrating the removal of cyanide by an impressive three orders of magnitude.
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BACTERIAL PLAYERS IN CROP SYSTEMS: BENEFITS AND RISKS IN THE " ONE HEALTH" PERSPECTIVES.
… lettuce phylloplane. On one hand, we collected freshwater samples along a gradient of increasing distance from the effluent releasing point of a WWTP located in the Cremona municipality to the Po River. From these samples, bacterial collection was established on selective media for …