Journal
CHEMOSPHERE
Volume 232, Issue -, Pages 281-286Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.05.187
Keywords
Organochlorine pesticide; Polyphenols; Green tea; In situ chemical reduction (ISCR); Soil and groundwater remediation; Reaction kinetics
Categories
Funding
- Ministry of Science and Technology of Taiwan [103-2221-E-005 -010 -MY3]
Ask authors/readers for more resources
The environmental persistence of hazardous organochlorine pesticides (OCPs) such as lindane has resulted in a need for the development of reliable remediation technology for the removal of OCPs. Green tea extract/Fe2+ under alkaline conditions is a potential green chemistry technology proven to be effective in reducing lindane. This study investigated the feasibility of directly using green tea leaves (GT-leaf) or cold-brew tea solution (GT-sol) with Fe2+ additives at (bi)carbonate buffered pH 10 to treat lindane in the aqueous phase. The polyphenol was gradually released in the GT-leaf system and reached a similar concentration as that in the GT-sol system (similar to 800 mg L-1 at pH 6.5). Based on the analytical results of lindane degradation byproducts, it was recognized that the reductive mechanism acts as a major pathway and alkaline hydrolysis is a minor pathway. However, physical adsorption rapidly removes lindane from the GT-leaf system. A comprehensive evaluation of lindane degradation, chlorobenzene formation, degradation kinetics, and chloride liberation were conducted for the alkaline GT-sol/Fe2+ system. The nonlinear simulations of the models developed showed good fits, with R-2 > 0.96. This study highlights the potential for GT-sol/Fe2+ systems to remediate OCPs contamination. (C) 2019 Published by Elsevier Ltd.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available