|
KMID : 0613820190290111294
|
|
Journal of Life Science
2019 Volume.29 No. 11 p.1294 ~ p.1303
|
|
|
Removal of Perchlorate from Salt Water Using Microorganisms
|
|
Ahn Yeong-Hee
|
|
|
Abstract
|
|
|
|
Perchlorate is an anionic pollutant that is very soluble and stable in water. It has been detected not only in soil/ground water but also in surface water, drinking water, food, fish, and crops. Perchlorate inhibits iodine uptake by the thyroid gland and reduces production of thyroid hormones that are primarily responsible for regulation of metabolism. Although various technologies have been developed to remove perchlorate from the environment, biodegradation is the method of choice since it is economical and environmentally friendly. However there is limited information on perchlorate biodegradation in salt environment such as salt water. Therefore this paper reviews biodegradation of perchlorate in salt water and related microorganisms. Most biodegradation research has employed heterotrophic perchlorate removal using organic compounds such as acetate as electron donors. Biodegradation research has focused on perchlorate removal from spent brine generated by ion exchange technology that is primarily employed to clean up perchlorate-contaminated ground water. Continuous removal of perchlorate at up to 10% NaCl was shown when bioreactors were inoculated with enriched salt-tolerant perchlorate-reducing bacteria. However the reactors did not show long-term stable removal of perchlorate. Microorganisms belonging to β- and γ-Proteobacteria were dominant in bioreactors used to remove perchlorate from salt water. This review will help our understanding of perchlorate removal from salt water to develop a decent biotechnology for the process.
|
|
|
KEYWORD
|
|
|
Biodegradation, perchlorate, perchlorate-reducing bacteria (PRB), salt-tolerant, salt water
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|