γ-MnO2的制备及其吸附除铬的性能
Preparation of γ-MnO2 and Its Properties of Adsorption and Removement of Chromium
摘 要
采用共沉淀法制备了γ-MnO2,通过扫描电子显微镜、X射线衍射和Fourier变换红外光谱对γ-MnO2进行了表征,探讨了投加量、酸度、温度和震荡时间等因素对γ-MnO2吸附去除废水中铬的性能的影响。所合成的γ-MnO2,表面富含羟基,对铬有很强的吸附能力,在90 min内即可达到吸附平衡。吸附动力学数据符合准二级速率方程,吸附模型符合Freundlich吸附等温线。
铬
吸附
动力学
γ-MnO2
Chromium
Adsorption
Kinetics
Abstract
γ-MnO2 was prepared by co-precipitation and characterized by SEM, XRD and FTIR. The effects of MnO2 dosage, pH, temperature and shock time on the adsorption capacity of chromium in waste water were investigated. The prepared γ-MnO2 was rich in hydroxyl groups, which was proved to be effective in removing chromium from water. The adsorption could reach equilibrium within 90 minutes. The adsorption kinetics followed the pseudo-secondorder rate equation, and the adsorption equilibrium followed the Freundlich model.
中图分类号 O657.3
所属栏目 工作简报
基金项目
收稿日期 2014/5/9
修改稿日期
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联系人作者孙玉凤(syfbr@163.com)
备注孙玉凤(1966-),女,辽宁葫芦岛人,高级实验师,主要从事环境中重金属污染的研究。
引用该论文: SUN Yu-feng,ZHANG Jing-yao. Preparation of γ-MnO2 and Its Properties of Adsorption and Removement of Chromium[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2015, 51(4): 496～501
孙玉凤,张敬瑶. γ-MnO2的制备及其吸附除铬的性能[J]. 理化检验－化学分册, 2015, 51(4): 496～501
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参考文献
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【3】李峰,吴欲,胡如南.我国电镀废水处理回用的现状及探讨［J］.电镀与精饰, 2011,33(10):17-21.
【4】陈英旭,朱祖祥,何增耀.环境中氧化锰对As(Ⅲ)氧化机理的研究［J］.环境科学学报, 1993,13(1):45-50.
【5】许丽娜,欧阳瑞镯,缪煜清.电化学法测定痕量镍的研究进展［J］.理化检验-化学分册, 2014,50(5):649-653.
【6】袁霞,韩悦,刘艳秋,等.活性炭制备及其在镀铬废液处理中的应用［J］.电镀与精饰, 2009,31(5):40-43.
【7】王丽敏,李英华.铅离子双印迹吸附剂的制备及其在原子吸收光谱法测定水中痕量铅中的应用［J］.理化检验-化学分册, 2014,50(5):589-593.
【8】MURRAY J W. The interfaction of metal ions at the mantanese deoxide-solution interface［J］. Geochim Cosmochim Acta, 1975,39:505-519.
【9】FREDERICK P, DAVID N, SAMUEL N, et al. Arsenic sorption onto laterite iron concretions: temperature effect［J］. Journal of Colloid and Interface Science, 2008,321(2):493-500.
【10】FU G, ALLEN H E, COWAN C E. Adsorption of cadmium and copper by manganese dioxide［J］. Soil Sei, 1991,152:72-81.
【11】GADDE R R, LAITINEN H A. Studies of heavy metal adsorption by hydrous iron and manganese oxides［J］. Anal Chem, 1974,46:2022-2026.
【12】GHOSH D, BHATTACHARYYA K G. Adsorption of methylene blur on kaolinite［J］. Appl Clay Sci, 2002,25(6):295-300.
【13】SUZUKI Y, YODA T, RUHUL A, et al. Molecular cloning and characterization of the gene coding for azoreductase from Bacillus sp.OY1-2 isolated from soil［J］. J Biol Chem, 2001,276(12):9059-9065.
【14】常方方,曲久辉,刘锐平,等.铁锰复合氧化物的制备及其吸附除砷性能［J］.环境科学学报, 2006,26(11):1769-1774.
【15】陆朝阳,沈莉莉,张全兴,等.吸附法处理染料废水的工艺及其机理研究进展［J］.工业水处理, 2004,24(3):12-16.
【16】GAO Y, MUCCI A. Acid base reactions, phosphate and arsenate complexation, and their competitive adsorption at the surface of goethite in 0.7M NaCl solution［J］. Geochimica et Cosmochimica Acta, 2001,65(14):2361-2378.
【17】GOLDBERY S. Competitive adsorption of arsenate and arsenite on oxides and clay minerals［J］. Soil Sci Sic Am J, 2002,66:413-421.
【18】李洁,姚超,张珊,等.δ型二氧化锰/埃洛石的制备及其对亚甲基蓝的吸附性能［J］.硅酸盐学报, 2014,42(2):241-247.
【19】蔡冬鸣,任南琪.不同晶型锰氧化物去除水中亚甲基蓝染料的研究［J］.环境科学学报, 2006,26(12):1971-1976.
【20】彭书传,王诗生,陈天亮,等.凹凸棒石吸附水溶性染料的热力学研究［J］.硅酸盐学报, 2005,33(8):1013-1017.
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