Remediation of organochlorine pesticides (OCPs) contaminated site by successive methyl-β-cyclodextrin (MCD) and sunflower oil enhanced soil washing–portulaca...
Publication Date
2014-06-30Author
Ye, Mao
Sun, Mingming
Hu, Feng
Kengara, Fredrick O
Jiang, Xin
Luo, Yongming
Yang, Xinlun
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Show full item recordAbstract/ Overview
An innovative ex situ soil washing technology was developed in this study to
remediate organochlorine pesticides (OCPs)-contaminated site. Elevated temperature (50
C) combined with ultrasonication (35 kHz, 30 min) at 25 g L− 1 methyl-β-cyclodextrin and
100 mL L− 1 sunflower oil were effective in extracting OCPs from the soil. After four
successive washing cycles, the removal efficiency for total OCPs, DDTs, endosulfans, 1, 2, 3,
4, 5, 6-hexachlorocyclohexanes, heptachlors, and chlordanes were all about 99%. The 4th
washed soil with 3 months cultivation of Portulaca oleracea L. and nutrient addition
significantly increase (p< 0.05) the number, biomass carbon, nitrogen, and functioning
diversity of soil microorganisms. This implied that the microbiological functioning of the soil
was at least partially restored. This combined cleanup strategy proved to be effective and …
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- Department of Chemistry [326]