中文摘要：

采用室内模拟实验研究了过氧化氢、类Fenton试剂、活化过硫酸钠对人工模拟菲、芘污染土壤的去除效果,以及处理后土壤中有机质（SOM）含量、过氧化氢酶（CAT）活性及土壤的植物毒性变化。结果表明化学氧化修复能降低多环芳烃（PAHs）污染土壤的植物毒性,减低土壤中的污染物浓度。经活化过硫酸钠处理,黑麦草种子的发芽率由41%提高到93%以上,对菲和芘的降解率均可达97%以上;经类Fenton试剂处理,黑麦草种子的发芽率由41%提高到88%以上,对菲和芘的降解率均可达87%以上;经过氧化氢处理,黑麦草种子的发芽率由41%提高到80%以上,对菲和芘的降解率均可达72%以上。分析原因可能是3种氧化剂处理后土壤中PAHs的浓度显著下降,降低了其毒性。

英文摘要：

Different oxidants have been evaluated for the removal of polycyclic aromatic hydrocarbons （PAHs） from contaminated soils using a simulation device. The soil organic matter （SOM） , catalase activity （CAT） , and seed germination ratio （GI）were investigated under different treatments. When activated persulfate was added, the re- moval ratios of phenanthrene and pyrene were more than 97% and the GI was raised from 41% to 93%. Under modified Fenton reagent treatment, the GI was raised from 41% to 88% , and the removal of phenanthrene and py- rene reached 87%. Under hydrogen peroxide treatment, the GI was raised from 41% to 80% , and the removal of phenanthrene and pyrene reached 72%. The results indicated that chemical remediation can reduce the phytotoxicity of contaminated soil and this maybe because most of the PAHs were oxidized during such treatment.