| 高效磷吸附剂Mg/Al-LDO的制备及除磷机制 |
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| 引用本文： | 王卫东,郝瑞霞,张晓娴,万京京,钟丽燕.高效磷吸附剂Mg/Al-LDO的制备及除磷机制[J].环境科学,2017,38(2):572-579. |
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| 作者姓名： | 王卫东 郝瑞霞 张晓娴 万京京 钟丽燕 |
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| 作者单位： | 北京工业大学建筑工程学院, 北京市水质科学与水环境恢复工程重点实验室, 北京 100124,北京工业大学建筑工程学院, 北京市水质科学与水环境恢复工程重点实验室, 北京 100124,北京工业大学建筑工程学院, 北京市水质科学与水环境恢复工程重点实验室, 北京 100124,北京工业大学建筑工程学院, 北京市水质科学与水环境恢复工程重点实验室, 北京 100124,北京工业大学建筑工程学院, 北京市水质科学与水环境恢复工程重点实验室, 北京 100124 |
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| 摘 要： | 针对污水中磷的去除问题,采用优化后的恒定pH值共沉淀法制备了Mg/Al-layered double hydroxides(Mg/Al-LDHs),经高温焙烧得到高效磷吸附剂Mg/Al-layered double oxide(Mg/Al-LDO);在对其吸附特性研究的基础上,并结合Zeta电位、XRD、FTIR分析吸附前后材料等电点、晶体结构及层间阴离子的变化,探讨Mg/Al-LDO吸附除磷机制.结果表明,采用优化后的共沉淀法,在Mg/Al比为2∶1,焙烧温度450℃,焙烧时间2 h条件下制备出的Mg/Al-LDO对磷酸根吸附性最好,最大吸附容量可达到176.94 mg·g-1,与理论吸附容量191.57 mg·g-1基本一致,远高出Mg/Al-LDHs及其它磷吸附剂.实验数据对准二级反应动力学模型的拟合结果较好,吸附过程符合Langmuir吸附等温模型.结合Zeta电位、XRD、FTIR的结果推测,Mg/AlLDO吸附除磷主要是通过静电引力、阴离子插层、离子交换、表面配位这4种作用协同完成.
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| 关 键 词： | 磷吸附剂 Mg/Al-LDO 制备条件 吸附特性 吸附机制 |
| 收稿时间： | 2016/6/27 0:00:00 |
| 修稿时间： | 2016/9/4 0:00:00 |
Preparation and Phosphorus Removal Mechanism of Highly Efficient Phosphorus Adsorbent Mg/Al-LDO |
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| WANG Wei-dong,HAO Rui-xi,ZHANG Xiao-xian,WAN Jing-jing and ZHONG Li-yan.Preparation and Phosphorus Removal Mechanism of Highly Efficient Phosphorus Adsorbent Mg/Al-LDO[J].Chinese Journal of Environmental Science,2017,38(2):572-579. |
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| Authors: | WANG Wei-dong HAO Rui-xi ZHANG Xiao-xian WAN Jing-jing and ZHONG Li-yan |
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| Institution: | Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing 100124, China,Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing 100124, China,Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing 100124, China,Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing 100124, China and Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing 100124, China |
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| Abstract: | |
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| Keywords: | phosphorous adsorbent Mg/Al-LDO synthesis conditions adsorption characteristics adsorption mechanism |
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