| 镉污染源水的应急处理技术研究 |
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| 引用本文： | 高中方,周克梅,陈志平,陈卫,林涛,王旭.镉污染源水的应急处理技术研究[J].中国给水排水,2009,25(11). |
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| 作者姓名： | 高中方 周克梅 陈志平 陈卫 林涛 王旭 |
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| 作者单位： | 1. 河海大学,环境科学与工程学院,江苏,南京,210098
2. 南京市自来水总公司,江苏,南京,210002 |
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| 基金项目： | 江苏省社会发展基金，江苏省建设科技计划项目 |
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| 摘 要： | 分析了发生突发性镉污染时镉在水体中的存在形式,考察了常规混凝、化学沉淀以及两者联用对镉污染源水的处理效果.结果表明:发生突发性镉污染时,镉在水体中主要以溶解态形式存在,所占比例＞60%;常规混凝沉淀可有效去除吸附态镉,但对溶解态镉的去除效果有限;化学沉淀法对镉有良好的去除效果,但会增加滤后水的浊度;化学沉淀与混凝联用技术可大大提高对镉的去除效果,在预调pH值至10、PAC的投加量为20 mg/L时,对镉的去除率＞97.7%,最大可处理浓度提高至0.220～0.264 mg/L.
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| 关 键 词： | 突发性镉污染 应急处理 混凝沉淀 化学沉淀 联用 |
Study on Emergency Treatment Technology of Source Water Polluted by Cadmium |
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| GAO Zhong-fang,ZHOU Ke-mei,CHEN Zhi-ping,CHEN Wei,LIN Tao,WANG Xu.Study on Emergency Treatment Technology of Source Water Polluted by Cadmium[J].China Water & Wastewater,2009,25(11). |
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| Authors: | GAO Zhong-fang ZHOU Ke-mei CHEN Zhi-ping CHEN Wei LIN Tao WANG Xu |
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| Affiliation: | GAO Zhong-fang1,ZHOU Ke-mei2,CHEN Zhi-ping2,CHEN Wei1,LIN Tao1,WANG Xu1(1.College of Environmental Science and Engineering,Hohai University,Nanjing 210098,China,2 Nanjing Tap Water General Company,Nanjing 210002,China) |
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| Abstract: | The existing forms of cadmium(Cd) in water polluted accidentally by Cd were analyzed,and the removal effects of Cd by conventional coagulation-sedimentation,chemical precipitation and the combined process were investigated.The results show that the dissolved Cd accounts for above 60% of the total Cd under accidental Cd pollution.The adsorbed Cd can be removed efficiently by the conventional coagulation-sedimentation,while the removal efficiency of the dissolved Cd is poor.The chemical precipitation process ... |
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| Keywords: | accidental cadmium pollution emergency treatment coagulation-sedimentation chemical precipitation combined process |
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