电解液对直流电场处理石油污染土壤的影响

直流电场处理石油污染土壤技术是一种发展中的土壤修复技术,有诸多优点。在该修复过程中,电解液的成分、电解液pH值控制对通过土壤的电流、土壤含水率、土壤含油率产生了影响。直流电场处理中通过土壤的电流与电解液成分、电解液pH值、土壤电导率和土壤湿度等因素密切相关。采用直流电场处理石油污染土壤效果明显,最低石油去除率达到73.6%。当电解液为0.1 mol/L 的Na2CO3时,通过调节pH值,可使通过土壤的电流达到1.6 A、土壤电导率达到0.9 S/m。处理后阴极、阳极和中间3个位置的土壤含油率分别从0.4672%降到0.0696%、0.0684%、0.0625%,石油去除率达到了85.1%。

Effect of electrolyte liquid on remediation of oil-contaminated soils in direct-current field

Using direct-current electric field to deal with the petroleum-contaminated soil is a developing soil remediation technology, which has many advantages. In this soil remediation process,the composition and the pH of the electrolyte have an impact on the current ,the moisture content and the oil content of the soil. The current of the soil is closely related to the composition, pH of the electrolyte and the conductivity , humidity of the soil. Using direct-current electric field to deal with the petroleum-contaminated soil has an obvious effect, and the oil removal rate is over 73.6%. When the electrolyte is 0.1 mol/L Na2CO3, the conductivity of the soil can achieve 1.6 A and 0.9 S/m, respectively by adjusting the pH. After the treatment, the oil content of the cathode,anode and the middle position of the soil are respectively reduced to 0.0696%,0.0684%,0.0625% from 0.4672%, and the oil removal rate is 85.1%.