生态与农村环境学报 ›› 2013, Vol. 29 ›› Issue (4): 524-528.doi:

• 污染控制与修复 • 上一篇    下一篇

微波法不同影响因素对土壤中氯丹降解的影响

王世强,赵浩,朱骏,赵贤广,刘爱宝,徐炎华   

  1. 南京工业大学环境学院
  • 收稿日期:2013-03-03 修回日期:2013-04-23 出版日期:2013-07-25 发布日期:2013-08-01
  • 通讯作者: 徐炎华 南京工业大学环境学院 E-mail:yanhuaxu18@yahoo.cn
  • 作者简介:王世强(1987-),男,湖北崇阳人,硕士生,主要从事有机污染土壤修复方面的研究。E-mail:115242197@qq.com
  • 基金资助:

    国家高技术研究发展计划(2009AA063103);基础研究计划(自然科学基金)重点项目(BK2010084);南京市农业化工重有机污染土壤工程中心资助项目;江苏省工业节水减排重点实验室新课题资助项目;江苏省博士后基金(1102008C)

Effects of Factors on Degradation of Chlordane Contaminated Soil by Microwave

WANG  Shi-Qiang, ZHAO  Hao, ZHU  Jun, ZHAO  Xian-Guang, LIU  Ai-Bao, XU  Yan-Hua   

  1. College of Environment, Nanjing University of Technology
  • Received:2013-03-03 Revised:2013-04-23 Online:2013-07-25 Published:2013-08-01
  • Contact: XU Yan-Hua College of Environment, Nanjing University of Technology E-mail:yanhuaxu18@yahoo.cn

摘要: 以农药生产企业搬迁遗留场地土壤为研究对象,研究了微波修复土壤技术的各影响因素对氯丹降解的影响。结果表明:在土壤含水率20%、pH值8.5、活性炭投加量50 g•kg-1、微波功率600 W和辐照时间20 min条件下,微波法对氯丹去除率达到89%;若土壤中氯丹去除温度保持在300 ℃以上,可使氯丹大幅度去除。各因素对微波法去除氯丹的影响由大到小依次为微波功率、辐照时间、活性炭投加量和含水率;修复过程中氯丹降解的中间产物有六氯、七氯和九氯等,推测其降解过程存在加氯和脱氯反应。

关键词: 氯丹, 微波, 修复, 土壤

Abstract: A batch experiment was carried out on remediation of chlordane contaminated soil by microwave, and factors affecting the remediation were studied. It was found that when the soil was 20% in moisture content, 8.5 in pH, and 50 g•kg-1 in activated carbon amended, and 20 minutes of irradiation with 600 W microwave, the removal rate of the chlordane in the soil reached to 89%,and the effect could be significantly increased if the soil temperature was be maintained above 300 ℃ during the process. The experiment proved that the factors affecting chlordane removal rate followed the order of microwave power > irradiation time > activated carbon amendment rate > moisture content. Analysis of the soil solution shows that the degradation had some intermediates, such as chlordene, heptachlor and nonachlor, which suggests that there existed chlorination and dechlorination reactions in the process.

Key words: chlordane, microwave, remediation, soil

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