Microbial reduction of arsenate in the presence of ferrihydrite

Article Abstract:

A report researching a method of reducing the presence of arsenate in contaminated soil.

Illustration, Soil pollution

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Rapid oxidation of arsenite in a hot spring ecosystem, Yellowstone National Park

Article Abstract:

Water samples from the Norris Geyser Basin in Yellowstone National Park are taken at regular intervals from the spring's mouth, and measured for levels of arsenic, arsenite, and arsenate. The role of three microbial communities are studied in relation to arsenic oxidation, and graphed.

Science & research, Waste Management and Remediation Services, Water Pollution, Montana, Environmental aspects, Pollution control industry, Bioremediation, Yellowstone National Park

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Pore water velocity and residence time effects on the degradation of 2,4-D during transport

Article Abstract:

A series of unsaturated soil column experiments with different column lengths and velocity (v) were used to study the independent effects of residence time (RT) and pore water v on the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D). Study results stress the difficulty in securing accurate model prediction with a single set of degradation rate parameter for all transport conditions. The results also show the need to create a better understanding of coupled processes involving contaminant degradation and transport. The experiments made use of Flathead fine sandy loam soil gathered at the Northwest Agricultural research Center, which was then air-dried, sieved and stored at room temperature.

Pesticide and Other Agricultural Chemical Manufacturing, Agricultural chemicals, not elsewhere classified, Herbicides 2,4-D, Analysis, Biodegradation, Dichlorophenoxyacetic acid, 2,4-D (Herbicide)

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