| Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups | |
| Department | 环境材料与生态化学研究发展中心 |
Zhu YF(朱永峰)1,2 ; Zheng YA(郑易安)1,3; Wang WB(王文波)1; Wang AQ(王爱勤)1; Wang AQ(王爱勤)
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| 2015 | |
| Source Publication | Journal of Water Process Engineering
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| ISSN | 2214-7144 |
| Volume | 7Pages:218-226 |
| Abstract | A series of granular hydrogels containing carboxy group and thiourea group were prepared by a facile redox-initiated polymerization in air atmosphere at room temperature, and then were used as the adsorbents for efficient adsorption of Pb(II) and Hg(II). The variables affecting the adsorption capacity were systematically investigated, including pH, initial concentration, contact time, and desorption and reusability. The results indicate that the as-prepared adsorbent has fast adsorption kinetics and high adsorption capacity, in particular for Hg(II), with the equilibrium time of about 40 min and the maximum adsorption capacity of 1106.72 mg/g for Hg(II). Over the pH range studied, this granular hydrogel shows insignificant changes in the adsorption capacity for Hg(II), while some noticeable differences are visible for Pb(II). The adsorption process for Pb(II) and Hg(II) can be described using the pseudo-second-order kinetic model and the equilibrium isotherm matches well with the Langmuir model. The reusability demonstrates that after five adsorption–desorption cycle, a high adsorption capacity is still observed for Pb(II) and Hg(II), though a decreasing tendency is inevitable. Consequently, the as-prepared granular hydrogel can be recognized as an effective adsorbent for the removal and recovery of heavy metal ions, especially for Hg(II) from aqueous solution. |
| Keyword | Granular Hydrogel Redox Polymerization Adsorption |
| Subject Area | 环境材料与生态化学 |
| DOI | 10.1016/j.jwpe.2015.06.010 |
| Funding Organization | the National Natural Science Foundation of China (21377135;21477135;51403221);“863” Project of the Ministry of Science and Technology, China (2013AA032003);the Fundamental Research Funds for the Central Universities (lzujbky-2015-127) |
| Language | 英语 |
| Funding Project | 功能复合材料组 |
| compositor | 第一作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/18854 |
| Collection | 环境材料与生态化学研究发展中心 |
| Corresponding Author | Wang AQ(王爱勤) |
| Affiliation | 1.Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China 2.University of the Chinese Academy of Sciences, Beijing 100049, PR China 3.Key Laboratory for Environment Pollution Prediction and Control, Gansu Province, College of Earth and Environment Sciences, Lanzhou University, Lanzhou 730000, PR China |
| Recommended Citation GB/T 7714 | Zhu YF,Zheng YA,Wang WB,et al. Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups[J]. Journal of Water Process Engineering,2015,7:218-226. |
| APA | Zhu YF,Zheng YA,Wang WB,Wang AQ,&王爱勤.(2015).Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups.Journal of Water Process Engineering,7,218-226. |
| MLA | Zhu YF,et al."Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups".Journal of Water Process Engineering 7(2015):218-226. |
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| Highly efficient ads（2893KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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