| Removal of Cr(VI) from water using polypyrrole/attapulgite core-shell nanocomposites: equilibrium, thermodynamics and kinetics |
| Chen, Yong ; Xu, Hui; Wang, Shiyu; Kang, Long
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| 2014
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| 发表期刊 | RSC ADVANCES
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| ISSN | 2046-2069
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| 卷号 | 4期号:34页码:17805-17811 |
| 摘要 | In this study polypyrrole (PPy) was synthesised chemically on the surface of attapulgite (ATP) to form nanocomposites using ATP as nucleus and PPy as shell. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) showed that ATP was coated with a PPy layer. PPy/ATP nanocomposites as adsorbents were used to remove Cr(VI) from aqueous solutions. External factors were investigated, including contact time, adsorbent dose, initial concentration of adsorbate and pH. The experimental data are well fitted with the Langmuir isotherm model. The thermodynamic parameters were evaluated and the results revealed that the adsorption process was exothermic and spontaneous. The kinetic data indicated that the adsorption process followed a pseudo-second-order equation, implying that the adsorption process was predominantly controlled by chemical processes. The associated adsorption mechanism for Cr(VI) removal by the PPy/ATP nanocomposites was investigated using X-ray photoelectron spectroscopy (XPS), which suggests that ion change and reduction processes on the surface of the nanocomposites may be the possible mechanism. |
| DOI | 10.1039/c3ra47351a
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| 收录类别 | SCI
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| 语种 | 英语
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| 资助项目 | National Natural Science Foundation[51062011]
; Gansu Natural Science Youth Foundation[1208RJYA086]
; Hong Liu Youth Train Plan of Lanzhou University of Technology[Q201013]
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| WOS研究方向 | Chemistry
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| WOS类目 | Chemistry, Multidisciplinary
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| WOS记录号 | WOS:000335227700049
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| 出版者 | ROYAL SOC CHEMISTRY
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/34490
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| 专题 | 石油化工学院
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| 通讯作者 | Chen, Yong |
| 作者单位 | Lanzhou Univ Technol, Coll Perochem Engn, Lanzhou 730050, Peoples R China
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| 第一作者单位 | 兰州理工大学
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| 通讯作者单位 | 兰州理工大学
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| 第一作者的第一单位 | 兰州理工大学
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推荐引用方式
GB/T 7714 |
Chen, Yong,Xu, Hui,Wang, Shiyu,et al. Removal of Cr(VI) from water using polypyrrole/attapulgite core-shell nanocomposites: equilibrium, thermodynamics and kinetics[J]. RSC ADVANCES,2014,4(34):17805-17811.
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| APA |
Chen, Yong,Xu, Hui,Wang, Shiyu,&Kang, Long.(2014).Removal of Cr(VI) from water using polypyrrole/attapulgite core-shell nanocomposites: equilibrium, thermodynamics and kinetics.RSC ADVANCES,4(34),17805-17811.
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| MLA |
Chen, Yong,et al."Removal of Cr(VI) from water using polypyrrole/attapulgite core-shell nanocomposites: equilibrium, thermodynamics and kinetics".RSC ADVANCES 4.34(2014):17805-17811.
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