| 改性钙铝LDH对水中硝基苯和萘的吸附 |
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| 引用本文： | 章萍,钱光人,王天琪,孙凯旋,周文斌. 改性钙铝LDH对水中硝基苯和萘的吸附[J]. 环境污染治理技术与设备, 2013, 0(10): 3708-3712 |
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| 作者姓名： | 章萍 钱光人 王天琪 孙凯旋 周文斌 |
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| 作者单位： | [1]南昌大学环境与化学工程学院教育部鄱阳湖生态与生物资源利用实验室,南昌330047 [2]上海大学环境与化学工程学院,上海200072 |
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| 基金项目： | 国家自然科学基金资助项目（20907029）;中国博士后基金第五十一批面上资助项目（2012M511456）;南昌大学鄱阳湖环境与资源利用教育部重点实验室开放基金（13005869） |
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| 摘 要： | 为了解经十二烷基硫酸钠（SDS）改性的钙铝LDH作为吸附剂吸附水体中硝基苯和萘的吸附性能，结合有机钙铝LDH的结构特征和有机质含量，对有机改性前后钙铝LDH分别对硝基苯、萘的动力学和等温吸附线进行了研究。探讨了其吸附机理。结果表明，有机钙铝LDH层间距为3．25nm，有机质含量约为45％。提出了有机改性后的钙铝LDH对硝基苯和萘的吸附率增强，且萘的吸附效率高于硝基苯；有机钙铝LDH对非离子型有机污染物的吸附作用机理主要为分配作用。
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| 关 键 词： | 钙铝LDH 有机改性 硝基苯 萘 吸附 |
Adsorption properties and mechanisms of nitrobenzene and naphthalene to CaAI-LDH modified by SDS from water |
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| Zhang Ping,Qian Guangren,Wang Tianqi,Sun Kaixuan,Zhou Wenbin. Adsorption properties and mechanisms of nitrobenzene and naphthalene to CaAI-LDH modified by SDS from water[J]. Techniques and Equipment for Environmental Pollution Control, 2013, 0(10): 3708-3712 |
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| Authors: | Zhang Ping Qian Guangren Wang Tianqi Sun Kaixuan Zhou Wenbin |
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| Affiliation: | 1. Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Environment ＆ Chemical Engineering, Nanchang University, Nanchang 330047, China; 2. College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200072, China) |
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| Abstract: | In order to understand the adsorption mechanism of SDS modified CaAl-LDH to nitrobenzene and naphthalene from water,the absorption behavior of organo-LDH from water was discussed by investigating the ad- sorption kinetics and adsorption isotherms. The as-prepared SDS modified LDHs displayed an interlayer distance of 3.25 nm and a 45% organic carbon content. Both the experimental and modeled data indicated that the re- moval efficiency of organic pollutions from water were improved with the use of SDS modified CaAl-LDH. Moreo- ver, the removal efficiency of naphthalene was higher than that of nitrobenzene due to its hydrophobicity. The mechanisms of organo-LDH adsorption of organic oollutions were revealed to he Partition contributions. |
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| Keywords: | CaAl-LDH organic modification nitrobenzene naphthalene adsorption |
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