| 零价铁修复1,3-二氯苯污染底泥 |
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| 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 |
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| 作者姓名： | 王新新 张 颖 王元芬 |
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| 作者单位： | 中国科学院沈阳应用生态研究所,陆地生态过程重点实验室,辽宁,沈阳,110016;中国科学院研究生院,北京,100049;中国科学院沈阳应用生态研究所,陆地生态过程重点实验室,辽宁,沈阳,110016 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金 |
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| 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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| 关 键 词： | 零价铁 修复 底泥 1 3-二氯苯 土壤酶 |
| 收稿时间： | 2008-07-04 |
| 修稿时间： | 2008-10-06 |
Remediation of Sediments Contaminated with 1, 3-Dichlorobenzene Using Zero-Valent Iron |
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| WANG Xin-xin,ZHANG Ying and 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 |
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| Authors: | WANG Xin-xin ZHANG Ying WANG Yuan-fen |
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| Affiliation: | 1.Key Laboratory of Terrestrial Ecological Processes, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China2.Key Laboratory of Terrestrial Ecological Processes, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | The removal of 1,3-dichlorobenzene in sediments using zero-valent iron(ZVI) was studied by batch experimentation.The changes of pH,Fe~(2+) and Fe~(3+) mass concentrations were detected in the process of remediation.At the end of the remediation,the soil enzyme activities were also detected.The results showed that the removal rate of 1,3-dichlorobenzene(initial concentration 500 (mg/kg),20 days) was 72.3% with ZVI addition equal to 2% sediment dry mass.This was 52.0% higher than that of the treatment without... |
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| Keywords: | zero-valent iron (ZVI) remediation sediments 1,3-dichlorobenzene soil enzyme |
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