Remediation of organochlorine pesticides (OCPs) contaminated site by successive methyl-β-cyclodextrin (MCD) and sunflower oil enhanced soil washing - Portulaca oleracea L. cultivation.

Abstract:

: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 environmental friendly.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Ye M,Sun M,Hu F,Kengara FO,Jiang X,Luo Y,Yang X

doi

10.1016/j.chemosphere.2013.12.058

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

119-25

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(13)01723-2

journal_volume

105

pub_type

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