| 不同化学氧化剂对焦化污染场地多环芳烃的修复效果 |
| 摘要点击 1816 全文点击 1987 投稿时间：2010-06-05 修订日期：2010-09-01 |
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| 中文关键词 多环芳烃 工业污染场地 氧化剂 修复 |
| 英文关键词 PAHs industrial contaminated sites oxidant remediation |
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| 中文摘要 |
| 采用模拟装置研究了不同化学氧化制剂对于焦化工业污染场地中多环芳烃（PAHs）的去除效果以及处理过程中污染物的去向.应用高锰酸钾处理土壤，总PAHs的去除效率最高，达96%，且大部分PAHs都被氧化，以气体形式挥发或转移到溶液中的比例很小，低于总PAHs的1%；其次是活化过硫酸钠，对总PAHs的去除率可达92%，类Fenton试剂对PAHs的去除效率为80%，活化过硫酸钠和类Fenton试剂处理过程中挥发和转移到溶液中的PAHs的量均低于总量的2%；过氧化氢和Fenton试剂对于PAHs的去除效率最低，均小于60%，且挥发或进入到溶液中而没有被氧化的PAHs最高达6%.因此，对于PAHs污染土壤的修复，高锰酸钾和过硫酸钠是较为有效、安全的化学氧化制剂.化学氧化修复对于苊烯、蒽、苯并芘以及二苯并(a,h)蒽、苯并(g,h,i)苝和茚并(1,2,3-cd)芘等PAHs的效果较好，芴、和荧蒽等PAHs的氧化去除率相对较低. |
| 英文摘要 |
| Different oxidants were evaluated for removal of polycyclic aromatic hydrocarbons (PAHs) from contaminated soils at industrial coking sites with the use of simulating device,and the fate of pollutants during the treatment was investigated.Permanganate showed the highest PAHs removal rate (96.2%) of the oxidants studied.Most of the PAHs were oxidized and only<1% of PAHs volatilized and transferred to the solvent.The removal of PAHs by activated persulfate reached 92%.Modified Fenton reagent could remove 80% of PAHs,and<2% of PAHs volatilized and transferred to the solvent after treatment with activated persulfate and modified Fenton reagent.The efficiencies of hydrogen dioxide and Fenton reagent for removal of PAHs were both<60%,and up to 6% of PAHs volatilized and transferred to the solvent.In summary,permanganate and activated persulfate are the most effective and environment-friendly oxidants for removing PAHs from contaminated soils.The chemical oxidants could easily remove ANY,ANT,BaP,DahA,BghiP and IcdP,but FLE,CHR and Fla were relatively resistant to chemical oxidation. |
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