title: An integrated (nano-bio) technique for degradation of γ-HCH contaminated soil.
abstract: We have evaluated the effect of an integrated (nano-bio) technique involving the use of stabilized Pd/Fe(0) bimetallic nanoparticles (CMC-Pd/nFe(0)) and a Sphingomonas sp. strain NM05, on the degradation of γ-HCH in soil. Factors affecting degradation such as pH, incubation temperature and γ-HCH initial concentration were also studied. The results revealed that γ-HCH degradation efficiency is ~ 1.7-2.1 times greater in integrated system as compared to system containing either NM05 or CMC-Pd/nFe(0) alone. The integration showed synergistic effect on γ-HCH degradation. Further, cell growth studies indicated that NM05 gets well acclimatized to nanoparticles, showing potential growth in the presence of CMC-Pd/nFe(0) with respect to control system. This study signifies the potential efficacy of integrated technique to become an effective alternative remedial tool for γ-HCH contaminated soil. Further research in this direction could lead to the development of effective remediation strategies for other isomers of HCH and other chlorinated pesticides as well.
authors.affiliation: Ecotoxicology Division, CSIR-Indian Institute of Toxicology Research, Mahatma Gandhi Marg, Lucknow, UP, India.
authors.forename: Ritu
authors.initials: R
authors.lastname: Singh
authors.forename: Natesan
authors.initials: N
authors.lastname: Manickam
authors.forename: Mohana Krishna Reddy
authors.initials: MK
authors.lastname: Mudiam
authors.forename: Ramesh Chandra
authors.initials: RC
authors.lastname: Murthy
authors.forename: Virendra
authors.initials: V
authors.lastname: Misra
mesh_terms: D001673:Biodegradation, Environmental; D001556:Hexachlorocyclohexane / Q000737:chemistry / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry; D007854:Lead / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry; D010575:Pesticides / Q000737:chemistry / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry* / Q000378:metabolism*; D020578:Sphingomonas / Q000378:metabolism; D013696:Temperature
chemical_list: D010575:Pesticides; D012987:Soil; D012989:Soil Pollutants; D007854:Lead; D001556:Hexachlorocyclohexane; D007501:Iron