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污染物浓度与土壤粒径对热脱附修复DDTs污染土壤的影响

王 瑛 李 扬 黄启飞 张增强

王 瑛, 李 扬, 黄启飞, 张增强. 污染物浓度与土壤粒径对热脱附修复DDTs污染土壤的影响[J]. 环境科学研究, 2011, 24(9): 1016-1022.
引用本文: 王 瑛, 李 扬, 黄启飞, 张增强. 污染物浓度与土壤粒径对热脱附修复DDTs污染土壤的影响[J]. 环境科学研究, 2011, 24(9): 1016-1022.
WANG Ying, LI Yang, HUANG Qi-fei, ZHANG Zeng-qiang. Effects of Different Pollutant Concentrations and Soil Particle Size on Thermal Desorption Efficiency of DDT-Contaminated Soil[J]. Research of Environmental Sciences, 2011, 24(9): 1016-1022.
Citation: WANG Ying, LI Yang, HUANG Qi-fei, ZHANG Zeng-qiang. Effects of Different Pollutant Concentrations and Soil Particle Size on Thermal Desorption Efficiency of DDT-Contaminated Soil[J]. Research of Environmental Sciences, 2011, 24(9): 1016-1022.

污染物浓度与土壤粒径对热脱附修复DDTs污染土壤的影响

基金项目: 国家“十一五”科技支撑计划项目(2007BAC16B03,2006BAC02A19)

Effects of Different Pollutant Concentrations and Soil Particle Size on Thermal Desorption Efficiency of DDT-Contaminated Soil

  • 摘要: 采集2种不同性质的土壤(黑土和棕壤)作为供试土壤,自配不同污染浓度(棕壤)和不同粒径(黑土)的DDT及其同系物(即DDTs,包括p,p′-DDT,o,p′-DDT,p,p′-DDD和p,p′-DDE)污染土壤,采用热脱附方法,分别对300 ℃,5个停留时间(10,20,30,40和50 min)下的DDTs总去除率及热处理前后各组分的脱附情况进行研究.结果表明,不同污染水平〔w(DDTs)分别为290.17,498.69和718.69 mg/kg〕的污染土壤中,DDTs的总去除率差异不显著.此外,在整个热处理过程中,污染水平对4种DDT及其同系物在土壤中的去除率也没有显著影响.而土壤粒径(0.25~0.85 mm,0.15~<0.25 mm,<0.15 mm)对DDTs的去除率影响显著,粒径越大的土壤越有利于DDTs脱附.单因素方差结果显示,粒径对土壤中p,p′-DDT和p,p′-DDE的脱附和转化有显著影响.

     

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出版历程
  • 收稿日期:  2010-12-20
  • 修回日期:  2011-03-08
  • 刊出日期:  2011-09-25

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