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首页> 外文期刊>Journal of Environmental Engineering >WASHING OF ZINC(II) FROM CONTAMINATED SOIL COLUMN
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WASHING OF ZINC(II) FROM CONTAMINATED SOIL COLUMN

机译:从受污染的土柱洗涤锌(II)

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Several chemical washing procedures were applied to a zinc(II) contaminated (artificially) soil column to determine metal-extraction efficiency. Specific extractants examined include acid solution, ethylenediaminetetraacetic acid (EDTA) and diethylenetriamine pentaacetic acid (DTPA) organic complexing agents, and chlorine, all at various concentrations. Effects of ionic strength, flow rate, and type of zinc contamination were also determined. These parameters affect metal removal via various physicochemical mechanisms. The most efficient washing occurred using the organic chelating agents at the lowest flow rate (essentially complete zinc removal), although nearly as much zinc could be removed at higher flow rates, requiring less washing time. The washing efficiency is strongly dependent on the form of the zinc contamination in the soil. [References: 21]
机译:将几种化学洗涤程序应用于锌(II)污染(人工)的土柱以确定金属提取效率。 所检查的特异性萃取剂包括酸溶液,乙二胺四乙酸(EDTA)和二亚乙基三胺戊酸(DTPA)有机络合剂和氯,全部浓度。 还测定了离子强度,流速和锌污染类型的影响。 这些参数通过各种物理化学机制影响金属去除。 最有效的洗涤发生,使用有机螯合剂以最低流速(基本上完全完全锌),尽管在较高的流速下可以除去几乎与锌一样多,但需要较少的洗涤时间。 洗涤效率强烈依赖于土壤中锌污染的形式。 [参考:21]

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