Soil remediation using in situ immobilisation techniques
Soil remediation using in situ immobilisation techniques
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DOI：
10.1080/02757540801920154
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发表时间：
2008-04
影响因子：
2.5
通讯作者：
E. Fawzy
中科院分区：
文献类型：
--
作者：
E. Fawzy
本研究的主要目的是探讨不同基质的效率，以减少提取的重金属污染土壤中的浓度。以2种Cu、Zn污染土壤为研究对象，采用分步提取法，研究了碳酸钙、膨润土、高岭土、木炭、氧化锰、氧化铁、沸石、磷酸盐8种基质对Cu、Zn有效态的去除效果及不同形态金属的形态变化。连续提取技术（一步，0.11 M乙酸，HONH 3Cl，H2O2+ NH 4OAc，王水）应用于污染土壤处理后和处理前，以评估金属形态。结果表明，碳酸钙、沸石和锰或铁氧化物处理对降低土壤有效金属含量效果最好。重金属连续分级表明，污染土壤中Cu和Zn的可交换态经化学修复后可转化为不可利用态。
The main objective of this study was to investigate the efficiency of different substrates to reduce the extraction of heavy metals concentration in a heavily contaminated soil. Two contaminated soils by Cu and Zn were used to evaluate the effectiveness of eight substrates (calcium carbonate, bentonite, kaolinite, charcoal, manganese oxide, iron oxide, zeolite, phosphate) to reduce metal availability and to study the change of metals speciation in different forms using sequential extraction technique (single step). Sequential extraction technique (single step, 0.11 M acetic acid, HONH3Cl, H2O2+NH4OAc, Aqua regia) was applied on contaminated soils after and before treatment to evaluate metals speciation. Results indicate that the most effective treatments in decreasing available metal concentrations were calcium carbonate, zeolite and manganese or iron oxide. Metal sequential fractionations indicate that the exchangeable fraction of Cu and Zn in contaminated soils can be transformed into unavailable forms after chemical remediation.