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首页> 外文期刊>Journal of Environmental Science and Health >Effect of H_2SO_4 and HC1 in the anode purging solution for the electrokinetic-Fenton remediation of soil contaminated with phenanthrene
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Effect of H_2SO_4 and HC1 in the anode purging solution for the electrokinetic-Fenton remediation of soil contaminated with phenanthrene

机译：阳极净化溶液中H_2SO_4和HC1对电动菲顿修复菲污染土壤的影响

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摘要

The Electrokinetic-Fenton (EK-Fenton) process is a powerful technology to remediate organic-contaminated soil. The behavior of salts and acids introduced for the pH control has significant influence on the H_2O_2 stabilization and destruction of organic contaminants. In this study, the effects of the type and concentration of acids, which were introduced at the anode, were investigated for the treatment of clayey soil contaminated with phenanthrene. In experiments with H_2SO_4 as the anode solution, H_2O_2 concentration in the anode reservoir decreased due to reaction between reduced species of sulfate and H_2O_2, as time elapsed. By contrast, HC1 as an electrolyte in the anode reservoir did not decrease the H_2O_2 concentration in the anode reservoir. The reaction between the reduced species of sulfate and H_2O_2 hindered the stabilization of H_2O_2 in the soil and anode reservoir. In experiments with HC1 for pH control, Cl, and Cl_2~-, which could be generated with mineral catalyzed Fenton-like reaction, did not significantly hinder H_2O_2 stabilization. H_2O_2 transportation with electro-osmotic flow and mineral catalyzed Fenton-like reaction on the soil surface resulted in the simultaneous transport and degradation of phenanthrene, which are dependent of the advancement rate of the acid front and electro-osmotic flow toward the cathode according to HO and H_2SO_4 concentrations in the anode purging solution.
机译：电动芬顿（EK-Fenton）工艺是一种强大的技术，可以修复受有机污染的土壤。为控制pH引入的盐和酸的行为对H_2O_2的稳定和有机污染物的破坏具有重大影响。在这项研究中，研究了在阳极处引入的酸类型和浓度的影响，以处理被菲污染的粘性土壤。在以H_2SO_4为阳极溶液的实验中，随着时间的流逝，由于硫酸盐还原物种与H_2O_2之间的反应，阳极储层中的H_2O_2浓度降低。相比之下，作为阳极池中电解质的HCl不会降低阳极池中H_2O_2的浓度。还原态硫酸盐和H_2O_2之间的反应阻碍了土壤和阳极储层中H_2O_2的稳定。在用HCl进行pH控制的实验中，矿物催化的Fenton样反应可能生成的Cl和Cl_2〜-并未显着阻碍H_2O_2的稳定。 H_2O_2在土壤表面的电渗流和矿物催化的Fenton样反应导致了菲的同时迁移和降解，这取决于HO的酸锋和电渗流向阴极的推进速率。阳极吹扫溶液中的H_2SO_4浓度。

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