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Remediation of Industrial Wastewater Sludge by Electrokinetic Geobox

机译:电动Geobox修复工业废水污泥。

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摘要

A pilot-scale study was conducted on in situ decontamination of industrial wastewater sludge containing relatively highrnconcentrations of target metal contaminants such as cadmium (6.85 mg/kg), chromium (117.5 mg/kg), copper (335.7rnmg/kg) and lead (64.1 mg/kg). A new type of geosystem (a cellular geobox) composed of geocomposites (electrokineticrngeosynthetic, GEK) was developed for waste remediation. A low-level direct current results in physicochemical changesrnin the applied media, leading to species transport by coupled mechanisms, such as electromigration, electro-osmosis,rnelectrophoresis and electrolysis of water. The modified geotextile and geocomposite with functions of filtration, drainage,rnconduction, and ion exchange capacity accelerated the contaminant removal rate. The electrokinetic removal efficienciesrnof abiotic heavy metals exceeded 85% for the mobile and weakly bound fractions, such as the exchangeable andrncarbonate fractions, and were higher than 69% for the strongly bound fractions, such as the organic/sulphide andrnresidual fractions. The final product can be used as landfill material.
机译:对工业废水污泥进行原位净化处理,该工业污泥含有较高浓度的目标金属污染物,例如镉(6.85 mg / kg),铬(117.5 mg / kg),铜(335.7rnmg / kg)和铅( 64.1 mg / kg)。开发了一种新型的地质系统(蜂窝地理箱),该系统由土工复合材料(电动地动合成,GEK)组成,用于废物处理。低水平的直流电会导致所用介质中的物理化学变化,从而通过电迁移,电渗,电泳和水电解等耦合机制导致物种迁移。改性的土工布和土工复合材料具有过滤,排水,导热和离子交换功能,可加快污染物的去除速度。对于可移动和弱结合的部分(例如可交换的碳酸氢盐部分),非生物重金属的电动去除效率超过85%,而对于强结合的部分(例如有机/硫化物和残留部分)的电动去除效率超过69%。最终产品可用作垃圾掩埋材料。

著录项

  • 来源
    《Geosynthetics 2013》|2013年|283-293|共11页
  • 会议地点 Long Beach CA(US)
  • 作者

    V. K. Tyagi;

  • 作者单位

    Managing Director, Hi-Tech Geosynthetics Pvt. Ltd., New Delhi, India, vipkolon@yahoo.com;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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