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。
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.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第4期95-100,共6页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金(40901149/81072989)
