摘要
通过模拟修复实验,采用Fenton试剂、活化过硫酸钠和过硫酸氢钾对焦化厂污染场地中多环芳烃的去除效果进行了研究。结果表明,双氧水(体积)和硫酸亚铁(质量)比例为5∶1,双氧水投加量为10%的Fenton试剂氧化去除PAHs的效果最好,去除率为55.11%;双氧水活化过硫酸钠比碱活化过硫酸钠对PAHs的去除效果好,但随着活化过硫酸钠投加量的增加,PAHs的去除率降低,活化过硫酸钠投加量在3%时,PAHs的去除率最高为77.7%;PAHs的去除率随过硫酸氢钾投加量的增加而上升,过硫酸氢钾投加量为5%时,PAHs的去除率达到72.76%。不同氧化剂对PAHs的去除存在各自的最佳剂量。对土壤中PAHs去除效果最好的是双氧水活化过硫酸钠,其次为过硫酸氢钾,Fenton试剂效果最差;且双氧水活化过硫酸钠去除PAHs污染物的修复率最高为66.67%。
We investigated the remediation effects of Fenton reagent, activated sodium persulfate and peroxy- monosuffate on soil contaminated by polycyclic aromatic hydrocarbons （PAHs） in coking plant contaminated site with a simulation test. The results show that the best removal rate of PAHs by Fenton reagent is 55.11% when H2O2-FeSO4 ratio is set at 5：1 and the dosage of H2O2 is 10% ;the removal effect of PAHs by sodium persulfate activated by H2O2 is better than sodium persulfate activated by sodium hydroxide. However, the PAHs removal rate reduces with the increase of the dosing of activated sodium persulfate and the best removal rate of PAHs is 77.7% when the dosing of activated sodium persulfate is 3%; the removal rate increases with the increase of peroxymonosulfate and the removal rate reaches 72.76% when the dosing of peroxymonosulfate is 5%. The best dosing for PAHs removal is different for different oxidants. Sodium persulfate activated by H2O2 exhibits the best of PAHs removal, peroxymonosulfate the second, and Fenton reagent the worst. The remediation rate of the removal of PAHs contaminant by sodium persulfate activated by H2O2 is the best and comes to 66.67%.
出处
《苏州科技大学学报（自然科学版）》
CAS
2017年第1期61-66,共6页
Journal of Suzhou University of Science and Technology（Natural Science Edition）
基金
国家自然科学基金资助项目(31570515)
苏州市科技计划项目(SS201523)
关键词
污染场地
化学氧化剂
多环芳烃
修复
contaminated sites
chemical oxidant
PAHs
remediation
