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高浓度DDTs污染土壤机械化学球磨试剂筛选

隋 红 李海波 宋 静 吴 鹏 张冬格 黄玉娟 余海波

隋 红, 李海波, 宋 静, 吴 鹏, 张冬格, 黄玉娟, 余海波. 高浓度DDTs污染土壤机械化学球磨试剂筛选[J]. 环境科学研究, 2015, 28(8): 1227-1233.
引用本文: 隋 红, 李海波, 宋 静, 吴 鹏, 张冬格, 黄玉娟, 余海波. 高浓度DDTs污染土壤机械化学球磨试剂筛选[J]. 环境科学研究, 2015, 28(8): 1227-1233.
SUI Hong, LI Haibo, SONG Jing, WU Peng, ZHANG Dongge, HUANG Yujuan, YU Haibo. Selection of Milling Reagents for Mechanochemical Degradation of High Concentrations of DDTs in Contaminated Soil[J]. Research of Environmental Sciences, 2015, 28(8): 1227-1233.
Citation: SUI Hong, LI Haibo, SONG Jing, WU Peng, ZHANG Dongge, HUANG Yujuan, YU Haibo. Selection of Milling Reagents for Mechanochemical Degradation of High Concentrations of DDTs in Contaminated Soil[J]. Research of Environmental Sciences, 2015, 28(8): 1227-1233.

高浓度DDTs污染土壤机械化学球磨试剂筛选

基金项目: 国家自然科学基金面上项目(41471262)

Selection of Milling Reagents for Mechanochemical Degradation of High Concentrations of DDTs in Contaminated Soil

  • 摘要: 为了筛选DDTs(包括DDT及其衍生物——DDE、DDD)高污染土壤无害化处理的机械化学球磨试剂,以某退役DDT生产场地高污染土壤为研究对象,将不添加任何球磨试剂处理作为对照,分析添加不同球磨主剂(CaO、CaO2和Fe粉)、球磨助剂(SiO2、Al2O3)组合以及双金属(Fe-Ni、Fe-Zn)试剂对土壤中DDTs的去除效果. 结果表明:①对照处理下土壤w(DDTs)随球磨时间的延长而不断降低,8 h后降至404.0 mg/kg,仍远超过GB 5085.6—2007《危险废物鉴别标准 毒性物质含量鉴别》标准限值〔w(DDTs)为50 mg/kg〕;单一添加CaO2处理球磨8 h后,土壤及球磨剂混合物中w(DDTs)仍为118.0 mg/kg;而单一添加CaO和Fe粉处理分别于球磨4和6 h后,土壤及球磨剂混合物中w(DDTs)低于GB 5085.6—2007标准,因此,CaO和Fe粉是较好的DDTs机械化学球磨主剂. ②与单一添加CaO处理相比,在CaO中加入球磨助剂SiO2或Al2O3球磨4 h后,土壤及球磨剂混合物中 w(DDTs)由28.55 mg/kg分别显著降至18.70或17.57 mg/kg,DDTs去除率由99.16%升至99.45%或99.48%. 与单一添加Fe粉处理相比,在Fe粉中加入SiO2或Al2O3球磨4 h后,土壤及球磨剂混合物中w(DDTs)由193.0 mg/kg分别显著降至54.25或69.98 mg/kg,虽然仍略超过GB 5085.6—2007标准限值,但却显示出SiO2或Al2O3对机械化学去除土壤DDTs具有显著的促进作用. ③Fe-Ni和Fe-Zn双金属球磨处理4 h后,土壤及球磨剂混合物中w(DDTs)分别为27.00和4.00 mg/kg,DDTs去除率分别达到99.21%和99.88%. 因此,Fe-Zn双金属作为去除土壤DDTs的机械化学球磨试剂,具有潜在的应用前景.

     

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  • 刊出日期:  2015-08-25

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