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首页> 美国卫生研究院文献>The Scientific World Journal >Integrated Electrokinetics-Adsorption Remediation of Saline-Sodic Soils: Effects of Voltage Gradient and Contaminant Concentration on Soil Electrical Conductivity
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Integrated Electrokinetics-Adsorption Remediation of Saline-Sodic Soils: Effects of Voltage Gradient and Contaminant Concentration on Soil Electrical Conductivity

机译：盐碱土的综合动电-吸附修复：电压梯度和污染物浓度对土壤电导率的影响

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In this study, an integrated in situ remediation technique which couples electrokinetics with adsorption, using locally produced granular activated carbon from date palm pits in the treatment zones that are installed directly to bracket the contaminated soils at bench-scale, is investigated. Natural saline-sodic clay soil, spiked with contaminant mixture (kerosene, phenol, Cr, Cd, Cu, Zn, Pb, and Hg), was used in this study to investigate the effects of voltage gradient, initial contaminant concentration, and polarity reversal rate on the soil electrical conductivity. Box-Behnken Design (BBD) was used for the experimental design and response surface methodology (RSM) was employed to model, optimize, and interpret the results obtained using Design-Expert version 8 platform. The total number of experiments conducted was 15 with voltage gradient, polarity reversal rate, and initial contaminant concentration as variables. The main target response discussed in this paper is the soil electrical conductivity due to its importance in electrokinetic remediation process. Responses obtained were fitted to quadratic models whose R 2 ranges from 84.66% to 99.19% with insignificant lack of fit in each case. Among the investigated factors, voltage gradient and initial contaminant concentration were found to be the most significant influential factors.
机译：在这项研究中，研究了一种集成的原位修复技术，该技术将电动学与吸附耦合在一起，使用了处理区内的枣棕坑中产生的局部生产的颗粒状活性炭，这些活性炭直接安装在工作台上，以将污染的土壤固定。在本研究中，使用掺有污染物混合物（煤油，苯酚，Cr，Cd，Cu，Zn，Pb和Hg）的天然盐碱粘土土壤来研究电压梯度，初始污染物浓度和极性反转的影响速率对土壤的电导率。 Box-Behnken设计（BBD）用于实验设计，响应面方法（RSM）用于建模，优化和解释使用Design-Expert版本8平台获得的结果。进行的实验总数为15，其中电压梯度，极性反转率和初始污染物浓度为变量。本文讨论的主要目标响应是土壤电导率，因为它在电动修复过程中很重要。所获得的响应适用于R 2 范围从84.66％到99.19％的二次模型，每种情况下都没有明显的拟合。在调查的因素中，电压梯度和初始污染物浓度是最重要的影响因素。

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