| 天然锰砂去除水中的砷 |
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| 引用本文： | 代天娇,彭彤,陶晨,吴俊延,郭华明,赵凯.天然锰砂去除水中的砷[J].环境工程学报,2013,7(1):58-64. |
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| 作者姓名： | 代天娇 彭彤 陶晨 吴俊延 郭华明 赵凯 |
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| 作者单位： | 1. 中国地质大学(北京)水资源与环境学院,北京,100083
2. 中国地质大学(北京)地下水循环与环境演化教育部重点实验室,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(41172224, 40872160);教育部新世纪优秀人才支持计划项目(NCET-07-0770) |
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| 摘 要： | 天然锰砂是一种廉价、高效的水处理用材料,但尚未用于水中砷的去除。实验研究了反应时间、砷形态、初始砷浓度、温度、溶液初始pH对吸附过程的影响。结果表明,天然锰砂对As(Ⅲ)的吸附能力大于As(Ⅴ)。25℃时,固液比为10 g/L的条件下,天然锰砂对初始浓度为5.0 mg/L的砷溶液吸附过程经72 h基本达到平衡,平衡时对As(Ⅲ)和As(Ⅴ)的去除率分别达到94.5%和85.9%。吸附过程符合Lagergren准一级反应动力学模型和假二级反应动力学模型。相比之下,假二级动力学模型拟合程度更高。对As(Ⅲ)和As(Ⅴ),45℃时的吸附量均大于25℃时。不同温度下,天然锰砂对As(Ⅲ)和As(Ⅴ)的吸附过程更符合Freundlich等温吸附模型。在溶液初始pH为3～10范围内,锰砂对砷的吸附能力受pH的影响较小。实验结果表明,天然锰砂是一种具有实际应用潜力的除砷材料。
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| 关 键 词： | 天然锰砂 除砷 吸附 砷形态 |
Removal of arsenic from water by natural manganese sand |
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| Dai Tianjiao,Peng Tong,Tao Chen,Wu Junyan,Guo Huaming and Zhao Kai.Removal of arsenic from water by natural manganese sand[J].Techniques and Equipment for Environmental Pollution Control,2013,7(1):58-64. |
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| Authors: | Dai Tianjiao Peng Tong Tao Chen Wu Junyan Guo Huaming and Zhao Kai |
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| Affiliation: | 1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;2. MOE Key Laboratory of Groundwater Circulation and Evolution, China University of Geosciences, Beijing 100083, China;1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;2. MOE Key Laboratory of Groundwater Circulation and Evolution, China University of Geosciences, Beijing 100083, China;1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;2. MOE Key Laboratory of Groundwater Circulation and Evolution, China University of Geosciences, Beijing 100083, China;1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;2. MOE Key Laboratory of Groundwater Circulation and Evolution, China University of Geosciences, Beijing 100083, China;1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;2. MOE Key Laboratory of Groundwater Circulation and Evolution, China University of Geosciences, Beijing 100083, China;1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;2. MOE Key Laboratory of Groundwater Circulation and Evolution, China University of Geosciences, Beijing 100083, China |
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| Abstract: | |
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| Keywords: | natural manganese sand arsenic removal adsorption arsenic species |
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