| 新生态二氧化锰悬浊液的制备及对三价砷氧化吸附机理的探讨 |
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| 引用本文： | 梁慧锋,刘占牛,马子川.新生态二氧化锰悬浊液的制备及对三价砷氧化吸附机理的探讨[J].河北大学学报(自然科学版),2005,25(5):515-519. |
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| 作者姓名： | 梁慧锋 刘占牛 马子川 |
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| 作者单位： | 1.邢台学院,生化系,河北,邢台,054001； 2.河北师范大学,化学学院,河北,石家庄,050016 |
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| 基金项目： | 河北省教育厅科学基金资助项目(04106) |
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| 摘 要： | 实验制备了新生态MnO2悬浊液并测定了其性质;从吸附动力学、等温吸附、pH值和离子强度等几个方面,探讨了新生态MnO2悬浊液对水中As(Ⅲ)去除作用的机理.结果表明:新生态MnO2对As(Ⅲ)去除过程符合二级动力学方程;pH=6.5时等温线符合Langmuir和Frundlich方程.pH值影响因素的研究表明,新生态MnO2对As(Ⅲ)吸附只是和体系的pH值有关,而与H3AsO3的pKa无关的非特性吸附.
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| 关 键 词： | 新生态MnO2 悬浊液 As(Ⅲ) 动力学方程 等温吸附 特性吸附 |
| 文章编号： | 1000-1565(2005)05-0515-05 |
| 修稿时间： | 2005年3月10日 |
Preparation of Nascent Manganese Dioxide and Discussion on the Mechanism of Oxidative Adsorption to Arsenic |
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| LIANG Hui-feng,LIU Zhan-niu,MA Zi-chuan.Preparation of Nascent Manganese Dioxide and Discussion on the Mechanism of Oxidative Adsorption to Arsenic[J].Journal of Hebei University (Natural Science Edition),2005,25(5):515-519. |
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| Authors: | LIANG Hui-feng LIU Zhan-niu MA Zi-chuan |
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| Institution: | LIANG Hui-feng~1,LIU Zhan-niu~1,MA Zi-chuan~2 |
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| Abstract: | The nascent manganese dioxide suspension was prepared.The mechanism of the removal of(As(Ⅲ)) from water by nascent MnO-2 suspension was studied by kinetics,adsorption isotherm,and pH.The results revealed that the date of adsorption of As(Ⅲ) on the nascent MnO-2 at room-temperature was fit two-order rate equation.In a solution of pH=6.5 Langumiur and Fundlich model can simulate to the adsorption equilibruim.The results of pH value effects showed that it was not characteristic adsorption relation to pKa of H-3AsO-3. |
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| Keywords: | nascent manganese dioxide suspension As(Ⅲ) kinetics equation adsorption isotherm characteristic adsorption |
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