铁基材料活化过硫酸盐修复石油烃污染土壤的效果研究

Study on the effect of activated persulfate by iron-based materials on soil contaminated by petroleum hydrocarbons

针对石油烃污染土壤问题,利用铁基材料活化过硫酸盐修复石油烃(TPH)污染土壤,研究不同参数条件下对石油烃的去除效果。试验结果表明:铁基材料催化剂选取纳米零价铁(nZVI),过硫酸钠(PS)投加量为1.5 mmol/g,纳米ZVI投加量按照PS与纳米ZVI摩尔比2∶1进行投加,水土比控制为1∶1,pH值控制在5~6之间,修复石油烃污染土壤最大去除率可达到66.7%。研究结果表明对实际工程中石油烃污染土壤修复具有一定的参考价值。

In order to solve the problem of soil pollution by petroleum hydrocarbon,the removal effect of petroleum hydrocarbon(TPH)contaminated soil was studied by activating persulfate with iron based materials.The test results show that:The catalyst based on iron material was selected as nano-zero-valent iron(n ZVI),the dosage of sodium persulfate(PS)was 1.5 mmol/g,the dosage of nano-ZVI was added according to the molar ratio of PS and nano-ZVI 2∶1,the soil water ratio was controlled to 1∶1,and the pH value was controlled between 5-6.The maximum removal rate of repairing petroleum hydrocarbon polluted soil could reach 66.7%.The research results have a certain reference value for the remediation of petroleum hydrocarbon polluted soil in practical engineering.