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Fate of the persistent organic pollutant (POP)Hexachlorocyclohexane (HCH) and remediation challenges

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Title Fate of the persistent organic pollutant (POP)Hexachlorocyclohexane (HCH)
and remediation challenges
 
Creator Srivastava, Vartika
Srivastava, Tanmay
Kumar, M. S.
 
Subject Microbiology
 
Description Persistent Organic Pollutants (POPs) are hazards to human health and exhibit harmful effects to the environment,
owing to their typically lipophilic and bio-accumulative nature. Chlorinated compounds are most relevant
within the classical POPs, which are both toxic and hazardous. Lindane, ‘γ’ isomer of hexachlorocyclohexane (γ-
HCH), is one such organochlorine compound primarily used as a fumigant and an insecticide in agriculture. Due
to its continuous use in the past decade throughout the world and severe environmental impacts in terms of
toxicity and threats, there is an urgent need to develop cleaning up and remediation strategies for the lindanecontaminated
sites. Being electron deficient due to its highly chlorinated nature, the degradation pathway of γ-
HCH is previously thought to be generally under anaerobic condition via reductive dechlorination. But both
aerobic and anaerobic degradation pathways are suggested for HCH isomers and biodegradation pathway of
lindane has been completely elucidated in Sphingomonas paucimobilis UT26. Many bioremediation technologies
viz. biostimulation, bioaugmentation, bioreactor systems have been employed so far for the treatment of HCH
contaminated soil. However, the potential of these strategies has been tested at the laboratory scale and should
be implemented for field-scale treatment of soil and aquatic systems contaminated with lindane and other HCH
isomers. This review focuses on the fundamentals about the biodegradation and also various technologies utilized
for full-scale remediation of HCH contamination in sediment and soils.
 
Publisher Elsevier
 
Date 2019
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1225/1/1-s2.0-S0964830518312447-main.pdf
Srivastava, Vartika and Srivastava, Tanmay and Kumar, M. S. (2019) Fate of the persistent organic pollutant (POP)Hexachlorocyclohexane (HCH) and remediation challenges. International Biodeterioration & Biodegradation, 140. pp. 43-56. ISSN 0964-8305
 
Relation https://www.journals.elsevier.com/international-biodeterioration-and-biodegradation/
http://neeri.csircentral.net/1225/