Method for detecting selenium speciation in groundwater

Article Abstract:

The use of SeO3(super 2-) and SeO4(super 2-) ionic species, total dissolved chemical Se and Organic Se measurements for calculating the speciation of dissolved Se in groundwater supplies was investigated. At pH 5.5, both ionic species were adsorbed onto the surface of CuO particles, after which they were desorbed when the pH was increased to 12.5. The concentrations of both ionic species were determined using hydride generation atomic adsorption spectrophotometry and ion chromatography.

Water, Underground, Groundwater, Contamination

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Selenium biotransformations by a euryhaline microalga isolated from a saline evaporation pond

Article Abstract:

A study aimed at examining the biotransformation activity of cocoid green alga from selenium-contaminated pond is presented. The experiment used GC-MS and multi-nuclear NMR to observe the aerobic biotransformation activity of eurylhaline alga (Chlorella species) for selenium (Se) oxyanions. The results of the experiment suggest the significance of eurylhaline microalgae in Se bioremediation efforts and biogeochemical cycling in contaminated aquatic habitats.

Other Marine Fishing, Miscellaneous marine products, Seaweed & Algae, Chlorella, Marine algae

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Selenium speciation of soil/sediment determined with sequential extractions and hydride generation atomic absorption spectrophotometry

Article Abstract:

Selenium is a major pollutant of irrigation drainage water in some western portions of the country. In order to predict the mineralization, mobilization, and toxicity of selenium in these systems, researchers used a sequential extraction scheme to examine the speciation of the multioxidation states of the trace element in seleniferous plant, soil, and sediment samples.

Research and Development in the Physical, Engineering, and Life Sciences, Water Pollution Control R&D, Pollution, Water pollution research

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