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零价铁修复1,3-二氯苯污染底泥

王新新 张 颖 王元芬

王新新, 张 颖, 王元芬. 零价铁修复1,3-二氯苯污染底泥[J]. 环境科学研究, 2009, 22(3): 289-293.
引用本文: 王新新, 张 颖, 王元芬. 零价铁修复1,3-二氯苯污染底泥[J]. 环境科学研究, 2009, 22(3): 289-293.
WANG Xin-xin, ZHANG Ying, WANG Yuan-fen. Remediation of Sediments Contaminated with 1, 3-Dichlorobenzene Using Zero-Valent Iron[J]. Research of Environmental Sciences, 2009, 22(3): 289-293.
Citation: WANG Xin-xin, ZHANG Ying, WANG Yuan-fen. Remediation of Sediments Contaminated with 1, 3-Dichlorobenzene Using Zero-Valent Iron[J]. Research of Environmental Sciences, 2009, 22(3): 289-293.

零价铁修复1,3-二氯苯污染底泥

基金项目: 国家重点基础研究发展计划(973)项目(2004CB418505);国家自然科学基金项目(30670391)

Remediation of Sediments Contaminated with 1, 3-Dichlorobenzene Using Zero-Valent Iron

  • 摘要: 通过序批试验研究了零价铁修复对底泥中1,3-二氯苯的去除效果,分析了零价铁修复过程中pH和铁离子质量浓度以及修复后底泥土壤酶的恢复情况. 结果表明:添加占底泥干质量2%的还原铁粉,1,3-二氯苯的去除率可达72.3%〔初始w(1,3-二氯苯)为500  mg/kg,培养时间为20 d〕,较未添加零价铁修复处理高52.0%. 零价铁有效地促进了底泥中1,3-二氯苯的去除,土著微生物在自然恢复中起一定的作用. 在修复过程中零价铁并未使底泥pH发生明显变化,底泥水体中的总铁质量浓度(低于0.3 mg/L)始终符合地表水环境质量标准(GB3838—2002). 1,3-二氯苯污染使底泥过氧化氢酶、转化酶和蛋白酶的酶活性显著降低,使脲酶的酶活性显著升高. 零价铁修复使1,3-二氯苯抑制的底泥过氧化氢酶的酶活性恢复到未污染对照水平.

     

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出版历程
  • 收稿日期:  2008-07-04
  • 修回日期:  2008-10-06
  • 刊出日期:  2009-03-25

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