| 咖啡渣对铅锌矿山酸性废水中Pb2+和Zn2+的吸附 |
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| 引用本文： | 林海,张小佩,董颖博,郑倩倩. 咖啡渣对铅锌矿山酸性废水中Pb2+和Zn2+的吸附[J]. 同济大学学报(自然科学版), 2014, 42(9): 1365-1371 |
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| 作者姓名： | 林海 张小佩 董颖博 郑倩倩 |
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| 作者单位： | 北京科技大学土木与环境工程学院,北京科技大学 土木与环境工程学院,北京科技大学土木与环境工程学院,北京科技大学土木与环境工程学院,北京科技大学土木与环境工程学院,北京科技大学土木与环境工程学院 |
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| 基金项目： | 国家自然科学基金项目（填写项目编号）51174017 |
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| 摘 要： | 以咖啡渣为原料,结合电子扫描显微镜、红外光谱分析仪和Zeta电位仪等研究吸附条件对吸附效果影响及吸附机理.结果表明:pH值为4、咖啡渣投加量为20g·L-1时,咖啡渣对Pb2+和Zn2+的吸附量最大,分别为5.49,12.38mg·g-1;吸附反应在4h后达到平衡,用拟二级动力学模型和Freundlich方程拟合效果较好;咖啡渣的电负性随pH值增加而增大,吸附Pb2+和Zn2+后表面变平整且出现白色颗粒;红外光谱图结果发现咖啡渣中参与吸附反应的基团主要有酰胺基、酯基、酮基.
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| 关 键 词： | 矿山酸性废水 咖啡渣 吸附 Pb2+ Zn2+ |
| 收稿时间： | 2013-11-13 |
| 修稿时间： | 2014-05-14 |
Adsorpting Pb2+ and Zn2+ from Acid Mine Drainage by Coffee Grounds |
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| LIN Hai,ZHANG Xiaopei,DONG Yingbo and ZHENG Qianqian. Adsorpting Pb2+ and Zn2+ from Acid Mine Drainage by Coffee Grounds[J]. Journal of Tongji University(Natural Science), 2014, 42(9): 1365-1371 |
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| Authors: | LIN Hai ZHANG Xiaopei DONG Yingbo ZHENG Qianqian |
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| Affiliation: | School of Civil and Environment Engineering, University of Science and Technology Beijing,School of Civil and Environment Engineering, University of Science and Technology Beijing,School of Civil and Environment Engineering, University of Science and Technology Beijing,chool of Civil and Environment Engineering, University of Science and Technology Beijing,School of Civil and Environment Engineering, University of Science and Technology Beijing,School of Civil and Environment Engineering, University of Science and Technology Beijing |
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| Abstract: | The research is mainly about the parameters effect the adsorption rate of Pb2 and Zn2 by coffee grouds. Scanning electron microscope, infrared spectrum analyzer and Zeta potentiometer are used to explore the mechanism. Test results show that the maximum adsorption quantity appears when pH value is 4 and also 2g adsorbent is added into the aqueous solution. The maximum adsorption quantity of Pb2 and Zn2 by coffee grouds is 5.49mg/g and 12.38mg/g. The adsorption process reaches equilibrium after 4 hours. And the adsorption process accords with the second order kinetics model and Freundlich equation. The electronegativity of coffee grouds increase while pH value raises and it reduces after adsorpting Pb2 and Zn2 . White particles appear on the surface of coffee grouds after the adsorption process. FT-IR spectrum indicates that the main functional groups includes amide, ester and keto in the adsorption process. |
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| Keywords: | acid mine drainage coffee grouds adsorption lead ions zinc ions |
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