| 新型纳米结构铈锰复合氧化物的磷吸附行为与机制研究 |
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| 引用本文： | 吴秋月,陈静,张伟,王东田,张高生. 新型纳米结构铈锰复合氧化物的磷吸附行为与机制研究[J]. 环境科学学报, 2015, 35(6): 1824-1832 |
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| 作者姓名： | 吴秋月 陈静 张伟 王东田 张高生 |
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| 作者单位： | 1. 苏州科技学院环境科学与工程学院,江苏省环境功能材料重点实验室,苏州215009
2. 中国科学院烟台海岸带研究所,中国科学院海岸带环境过程与生态修复重点实验室,山东省海岸带环境工程技术研究中心,烟台264003 |
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| 基金项目： | 国家自然科学基金(No.51178453);江苏省环境功能材料重点实验室开放基金项目(No.SJHG1312) |
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| 摘 要： | 采用共沉淀法制备了一种新型铈锰复合氧化物吸附剂,对其进行了表征,并对磷吸附行为与机制进行了研究.表征结果分析表明,此氧化物由纳米级颗粒组成;铈锰复合氧化物中的铈氧化物有类似水合氧化铈的无定形结构;BET比表面积为157 m2·g-1,等电点为6.5.吸附实验结果表明,Langmuir吸附等温线模型可以更好地拟合铈锰复合氧化物对磷的吸附,最大吸附量为28.6 mg·g-1(p H=7.0);铈锰复合氧化物对磷具有较高的吸附速率,更符合准二级动力学模型;溶液p H对铈锰复合氧化物吸附磷的影响较为明显,随p H升高,吸附量降低;离子强度则影响不大;共存阴离子对吸附影响的大小顺序为Si O2-3CO2-3Cl-≥SO2-4.通过对铈锰复合氧化物吸附磷前后Zeta电位和红外谱图(FTIR)分析,可以推断磷在铈锰复合氧化物表面发生了特性吸附,磷酸根主要通过取代复合氧化物表面的金属羟基而被吸附去除.
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| 关 键 词： | 铈锰复合氧化物 纳米结构 磷 吸附 机制 |
| 收稿时间： | 2014-07-23 |
| 修稿时间： | 2014-09-30 |
Adsorption of phosphate on a novel nanostructured Ce-Mn binary oxide: Behavior and mechanism |
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| WU Qiuyue,CHEN Jing,ZHANG Wei,WANG Dongtian and ZHANG Gaosheng. Adsorption of phosphate on a novel nanostructured Ce-Mn binary oxide: Behavior and mechanism[J]. Acta Scientiae Circumstantiae, 2015, 35(6): 1824-1832 |
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| Authors: | WU Qiuyue CHEN Jing ZHANG Wei WANG Dongtian ZHANG Gaosheng |
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| Affiliation: | Jiangsu Key Laboratory for Environment Functional Materials, Environment Science and Engineering College, Suzhou University of Science and Technology, Suzhou 215009,Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environment Engineering and Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003,Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environment Engineering and Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003,Jiangsu Key Laboratory for Environment Functional Materials, Environment Science and Engineering College, Suzhou University of Science and Technology, Suzhou 215009 and Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environment Engineering and Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003 |
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| Abstract: | |
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| Keywords: | Ce-Mn binary oxide nano-structure phosphate adsorption mechanism |
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