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铬污染建筑废物清洗剂的筛选

张艳霞 王兴润 孟昭福 舒俭民 刘锋 何洁

张艳霞, 王兴润, 孟昭福, 舒俭民, 刘锋, 何洁. 铬污染建筑废物清洗剂的筛选[J]. 环境科学研究, 2012, 25(6): 706-711.
引用本文: 张艳霞, 王兴润, 孟昭福, 舒俭民, 刘锋, 何洁. 铬污染建筑废物清洗剂的筛选[J]. 环境科学研究, 2012, 25(6): 706-711.
ZHANG Yan xia, WANG Xing run, MENG Zhao fu, SHU Jian min, LIU Feng, HE Jie. Screening of Washing Agents for the Removal of Chromium from Contaminated Construction Waste[J]. Research of Environmental Sciences, 2012, 25(6): 706-711.
Citation: ZHANG Yan xia, WANG Xing run, MENG Zhao fu, SHU Jian min, LIU Feng, HE Jie. Screening of Washing Agents for the Removal of Chromium from Contaminated Construction Waste[J]. Research of Environmental Sciences, 2012, 25(6): 706-711.

铬污染建筑废物清洗剂的筛选

基金项目: 国家高技术研究发展计划(863)项目(2009AA063101-2)

Screening of Washing Agents for the Removal of Chromium from Contaminated Construction Waste

  • 摘要: 以原海北化工厂的铬污染建筑废物为研究对象,用微波消解、碱消解-共沉淀和改良BCR顺序提取法,研究了不同粒径样品总Cr和Cr(Ⅵ)以及各形态Cr的含量,探讨了6种清洗剂对样品总Cr和Cr(Ⅵ)的清洗效果,最终筛选出合适的清洗剂. 结果表明:粒径对样品总Cr和Cr(Ⅵ)以及各形态Cr含量的影响不显著,对样品总Cr和Cr(Ⅵ)的解吸无影响. 水洗1次后,总Cr和Cr(Ⅵ)的去除率分别为75.24%和77.59%;用6种清洗剂第2次清洗后,柠檬酸、高浓度盐酸和高浓度醋酸对总Cr和Cr(Ⅵ)的去除率最高,均达到94%以上,说明这3种酸可将Cr(Ⅵ)还原为Cr(Ⅲ),从而去除Cr(Ⅵ). 从经济环保角度考虑,宜选择柠檬酸作为二次清洗剂.

     

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  • 刊出日期:  2012-06-25

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