The Fundamental Study on th e Soil Remediation for Copper Contaminated Soil using Nanobubble Water

IF 0.4 Q4 ENGINEERING, GEOLOGICAL Journal of the Korean Geosynthetic Society Pub Date : 2017-03-30 DOI:10.12814/JKGSS.2017.16.1.031
Jeon Sohee, Dongchan Kim, Junggeun Han
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引用次数: 6

Abstract

The fundamental study for an application of nanobubble as a soil remediation enhancer on heavy metal contaminated soil was carried out. The existence and long-term stability of hydrogen nanobubbles were investigated by particle analysis and zeta-potential analysis. And the removal efficiency of copper using nanobubble water(NBW) and distilled water(DW) were compared and analyzed through a batch desorption test. As a result, it is confirmed that nanobubble which was fabricated by compression-dissolution type generator can exist for more than 14 days. The results of batch test show that copper removal of NBW was higher than that of DW irrespectively to soil type and increased as solid-liquid ratio and contact time increased, respectively. According to the pH change, the removal of copper on sand was higher on the acid side but the removal difference was slightly lower on the clay. It is considered that a high efficiency of NBW in copper removal is due to the large surface area and high zeta-potential of nanobubbles. Therefore, the nanobubble can be applied to soil remediation for heavy-metal contaminated soil as an eco-friendly enhancer.
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纳米泡水修复铜污染土壤的基础研究
对纳米气泡作为土壤修复增强剂在重金属污染土壤中的应用进行了基础研究。通过粒子分析和ζ电位分析研究了氢纳米泡的存在性和长期稳定性。通过间歇解吸试验,对比分析了纳米泡水(NBW)和蒸馏水(DW)对铜的去除效果。实验结果表明,用压缩-溶解型发生器制备的纳米气泡可存在14天以上。批量试验结果表明,不同土壤类型,NBW对铜的去除率均高于DW,且随固液比和接触时间的增加而增加。根据pH的变化,砂对铜的去除率在酸侧较高,而粘土对铜的去除率差异略低。认为NBW除铜效率高的原因在于纳米气泡的表面积大、ζ电位高。因此,纳米气泡作为生态友好型增强剂可用于重金属污染土壤的土壤修复。
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