Title: Study on the extractive effect of soil heavy metals with organic acids and surfactants
Abstract: It is necessary for removal of the heavy metals by leaching in-situ to both high efficiency and less destruction of soil properties,which is particularly important to remediation of contaminated agricultural soil.In case of the contaminated soil samples from Zhangshi sewage irrigation region,this paper screened the combination of the organic acids and surfactants by oscillating extraction and identified the best ratio of them.The results showed that the tartaric acid and saponin were of the best effect for extraction the Cd,Pb,and Zn.The best concentration were 0.5 mol·L-1 for tartaric acid,0.7% for saponin respectively,the best volume proportion was 1∶1,and the extraction rate were 87.62%,36.30%,20.67% respectively;whether of the single organic acid,surfactant or the mixture of organic acid and surfactant,the extraction ratio of the heavy metals were all CdPbZn.The effect of organic acid and surfactant joint leaching slightly below the tartaric acid leaching,but the weak acid was little affected the soil properties,and would have better prospects for the in-situ remediation of HMs contaminated soils by leaching.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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