| 锰矿尾渣改性壳聚糖对Pb^2＋的吸附 |
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| 引用本文： | 李爱阳,;宋楚华,;蔡玲,;唐有根.锰矿尾渣改性壳聚糖对Pb^2＋的吸附[J].环境污染治理技术与设备,2009(4):630-634. |
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| 作者姓名： | 李爱阳 ;宋楚华 ;蔡玲 ;唐有根 |
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| 作者单位： | [1]湖南工学院化学化工系,衡阳421002; [2]中南大学化学化工学院,长沙410083 |
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| 基金项目： | 湖南省自然科学基金项目（08JJ3015）;湖南省教育厅科研计划项目（07C030）;衡阳市工业科研开发计划项目（06KG59） |
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| 摘 要： | 将工业废弃物锰矿尾渣与壳聚糖混合制得一种高效吸附斛，并应用扫描电镜、X射线衍射对其结构进行了表征。采用正交表设计试验，分别考察了pH值、吸附时间、温度、复合吸附剂的投加量等4个影响因素对Pb^2＋吸附的影响，最佳吸附条件为：pH值为7，吸附时问为40mjn，温度为20℃，复合吸附剂的投加量为0．10g。处理后的水符合国家污水综合排放标准（GB8978．1996）中的一级标准。复合吸附剂对Pb^2＋的吸附符合Langmuir和Freundlich吸附等温方程。
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| 关 键 词： | 锰矿尾渣 壳聚糖 改性 吸附 Pb2+ |
Adsorption of Pb^2＋ on chitosan modified by manganese mine tailings |
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| Institution: | Li Aiyang Song Chuhua Cai Ling Tang Yougen (1. Department of Chemistry And Chemical Engineering, Hunan Institute of Technology, Hengyang 421002; 2. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083) |
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| Abstract: | A kind of high adsorbent was made from the combination of manganese mine tailings of industry flesh-discard and chitosan. The adsorbent samples were characterized by scanning electron microscrope （SEM） and X-ray diffraction（XRD）. By using the orthogonal design experiment, four factors such as pH, adsorption time, temperature and dosage of composite adsorption on the absorption of Pb^2＋ were investigated. The best adsorption conditions were the pH value 7, the adsorption time 40 min, the temperature 20℃ and the dosage of adsorption 0. 10 g. The quality indexes of the wastewater after treatment conform with the first-class standard of National Discharge Standards（GB8978-1996）. The adsorption behaviors of modified adsorbent accord with Langmuir and Freundlich isothermal adsorption equations. |
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| Keywords: | manganese mine tailings chitosan modification adsorption Pb^2＋ |
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