An innovative ex situ soil washing technology was developed in this study to remediate organochlorine pesticides(OCPs)and heavy metals in a mixed contaminated *** temperature(60 ℃)combined with ultrasonication(40 kHz...
An innovative ex situ soil washing technology was developed in this study to remediate organochlorine pesticides(OCPs)and heavy metals in a mixed contaminated *** temperature(60 ℃)combined with ultrasonication(40 kHz,20 min)at 50 mL L-1 maize oil and 45 g L-1carboxylmethyl-β-cyclodextrin were effective in extracting pollutants from the *** two successive washing cycles,the removal efficiency rates for total OCPs,mirex,endosulfans,chlordanes,Cd,and Pb were approximately 94.7%,87.2%,98.5%,92.3%,91.6%,and 87.3%,*** of vetiver grass and addition of nutrients for 3 months further degraded 34.7%of the residual total OCPs and partially restored the microbiological functions of the *** result was indicated by the significant increase in the number,biomass C,N,and functioning diversity of soil microorganisms(p < 0.05).After the treatment,the residual OCPs and heavy metals existed as very slowly desorbing fraction and residual fraction,as evaluated by Tenax extraction combined with a fast-three-compartment model and sequential ***,the secondary environmental risk of residual pollutants in the remediated soil was at an accept able *** proposed combined cleanup strategy proved to be effective and environmentally friendly.
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