Preparation of Thiourea Functionalized Polyvinyl Alcohol-Coated Magnetic Nanoparticles and Their Application in Pb2+ Ions Adsorption
Preparation of Thiourea Functionalized Polyvinyl Alcohol-Coated Magnetic Nanoparticles and Their Application in Pb2+ Ions Adsorption
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硫脲功能化聚乙烯醇包覆磁性纳米粒子的制备及其在Pb离子吸附中的应用
DOI：
10.1002/app.40777
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发表时间：
2014-09
影响因子：
3
通讯作者：
Zhao, Shen
中科院分区：
文献类型：
--
作者：
Guo, Chen;Yang, Mingzhu;Xia, Tingting;Zhao, Shen
用聚乙烯醇(PVA)和硫脲对磁性纳米粒子进行修饰，制备了一种新型的磁性纳米粒子，该磁性纳米粒子对Pb2+离子具有较高的吸附容量和良好的选择性。将得到的磁性纳米颗粒用于吸附水溶液中的Pb2+离子。考察了溶液pH值、吸附时间、吸附温度、共存离子和Pb2+的初始浓度对Pb2+吸附的影响。结果表明，Pb2+离子的吸附为吸热反应，30min内达到吸附平衡。吸附Pb2+的最适pH为5.5，最大吸附容量为2 2 0 mg/g，同时存在的阳离子如Ca~(2+)、Co~(2+)、Ni~(2+)对Pb2+吸附影响不大。再生研究表明，硫脲功能化的PVA包覆磁性纳米粒子可重复使用5次循环吸附水溶液中的Pb2 1离子，吸附容量没有明显变化。(C)2014年威利期刊公司。
We have prepared a novel kind of magnetic nanoparticle with high adsorption capacity and good selectivity for Pb2+ ions by modifying the magnetic nanoparticles with polyvinyl alcohol (PVA) and thiourea. The resultant magnetic nanoparticles were used to adsorb Pb2+ ions from aqueous solution. The influence of the solution pH, the adsorption time, the adsorption temperature, coexisting ions, and the initial concentration of Pb2+ ions on the adsorption of Pb2+ ions were investigated. The results indicated that Pb2+ ions adsorption was an endothermic reaction, and adsorption equilibrium was achieved within 30 min. The optimal pH for the adsorption of Pb 21 ions was pH 5.5, and the maximum adsorption capacity of Pb2+ ions was found to be 220 mg/g. Moreover, the coexisting cations such as Ca2+, Co2+, and Ni2+ had little effect on adsorption of Pb2+ ions. The regeneration studies showed that thiourea functionalized PVA-coated magnetic nanoparticles could be reused for the adsorption of Pb 21 ions from aqueous solutions over five cycles without remarkable change in the adsorption capacity. (C) 2014 Wiley Periodicals, Inc.
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影响因子：
9.9
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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通讯作者：
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影响因子：
15.1
作者：
Chen, Anwei;Zeng, Guangming;Xie, Gengxin
通讯作者：
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