Enhanced washing of HCB and Zn from aged sediments by TX-100 and EDTA mixed solutions

Simultaneous removal of multiple heavy metals from soil by washing with citric acid and ferric chloride

“…In the lab, most of the experiments were small-scale washing tests in centrifuge tubes. 3,59,60 Subsequently, large-scale stirring and washing equipment were used. 61,62 Here, the removal of heavy metals in a slurry reactor was investigated to explore the application of washing with CA and FeCl 3 .…”

Research on Progress in Combined Remediation Technologies of Heavy Metal Polluted Sediment

“…In practice, researchers try remove heavy metals from sediment by a combined remediation using multiple eluents, which can not only reduce the application quantity of eluents and reduce the risk of secondary pollution, but also effectively improve the efficiency of heavy metal removal. Yuan et al [28] used the mixture of surfactant Triton X-100 and chelating agent ethylenediaminetetraacetic acid (EDTA) to remove heavy metals from sediment. The results showed that the removal rate of Zn reached 30.0% by utilizing the mixed solution, which increased 2%-5% compared with cases only using EDTA.…”

Physiochemical technologies for HCB remediation and disposal: A review

“…Comparison of HCB desorption from contaminated kaolin by anionic, nonionic and cationic surfactants showed the sequence of Tween 80 > sodium dodecyl benzene sulfonic (SDBS) > myristyl pyridinium bromide (MPB), accompanied with the sequence of surfactant adsorption on kaolin as MPB > Tween 80 > SDBS [47]. For the simultaneous washing of HCB and heavy metal from aged contaminated sediments, it was noted that the complexant of ethylenediaminetetraacetic acid (EDTA) posed minimal influence on the surfactant-enhanced HCB desorption [48]. However, the interaction of surfactant and humic acid (HA) had appreciable influence on their adsorption to soil particles [49].…”