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Perchlorate Removal by River Microorganisms in Industrial Complexes
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 Title & Authors
Perchlorate Removal by River Microorganisms in Industrial Complexes
Jo, Kang-Ick; Ahn, Yeonghee;
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Perchlorate () is an emerging contaminant of soil/groundwater and surface water. has been shown to inhibit iodide uptake into the thyroid gland and cause a reduction in thyroid hormone production. is highly soluble and very stable in water. Biodegradation by -reducing bacteria (PRB) is considered the most important factor in natural attenuation of . Rivers in an industrial complex have potential to be contaminated with discharged from point or non-point sources. In this study, water samples were taken from the rivers running through the Gumi industrial complexes and used for batch test to analyze -degradation potential of river microorganisms. The results of 83-h batch culture showed that -removal efficiency of all samples was 0.77% or less without addition of an external electron () donor. However -removal efficiency was higher when an donor (acetate, thiosulfate, , or ) was added into the batch culture, showing up to 100% removal efficiency. The removal efficiency was various depending on type of donor and site of sampling. When acetate was used as an donor, the highest -removal efficiency was observed among the donors used in this study, suggesting that activity of heterotrophic PRB was dominant. The results of this study provide basic information on natural attenuation of by river microorganisms. The information can be useful to prepare a strategy to enhance efficiency of biodegradation for in situ bioremediation.
Biodegradation;Electron Donor;Indigenous Microorganisms;Perchlorate;Reduction;
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