| Rapid and wide pH-independent ammonium-nitrogen removal using a composite hydrogel with three-dimensional networks | |
| Department | 环境材料与生态化学研究发展中心 |
Zheng YA(郑易安)1,2 ; Xie YT(谢云涛)1,2; Wang AQ(王爱勤)1; Wang AQ(王爱勤)
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| 2012 | |
| Source Publication | Chemical Engineering Journal
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| ISSN | 1385-8947 |
| Volume | 179Pages:90-98 |
| Abstract | Chitosan grafted poly(acrylic acid)/unexpanded vermiculite (CTS-g-PAA/UVMT), a granular composite hydrogel with three-dimensional networks, was prepared via in situ graft polymerization and evaluated as the adsorbent to remove ammonium-nitrogen (NH4-N) from aqueous solution using batch adsorption experiments. The effects of various experimental parameters on NH4-N removal, such as vermiculite content, pH, contact time, NH4-N concentration and co-existing PO4-P ion were investigated. The adsorption capacities in different water bodies including distilled water, tap water, well water and lake water were compared to study further the influence of ion strength on NH4-N removal. The results indicate that the adsorption equilibrium can be achieved within a few minutes and the maximum, constant adsorption capacity can be observed in a wide pH range of 4.0–8.0. The adsorbent can exclusively adsorb NH4-N in the mixing solution containing NH4-N and PO4-P, suggesting that the electrostatic attraction dominates the whole adsorption process. Five consecutive adsorption–desorption studies show that the composite hydrogel has higher adsorption and desorption efficiencies, suggesting the potential of the as-prepared adsorbent for NH4-N removal. |
| Keyword | Ammonium Composite Hydrogel Fast-responsive Removal Three-dimensional Networks |
| Subject Area | 环境材料与生态化学 |
| DOI | 10.1016/j.cej.2011.10.064 |
| Funding Organization | the National Natural Science Foundation of China (No. 21107116) |
| Indexed By | SCI |
| If | 3.473 |
| 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/362003/2527 |
| 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.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Zheng YA,Xie YT,Wang AQ,et al. Rapid and wide pH-independent ammonium-nitrogen removal using a composite hydrogel with three-dimensional networks[J]. Chemical Engineering Journal,2012,179:90-98. |
| APA | Zheng YA,Xie YT,Wang AQ,&王爱勤.(2012).Rapid and wide pH-independent ammonium-nitrogen removal using a composite hydrogel with three-dimensional networks.Chemical Engineering Journal,179,90-98. |
| MLA | Zheng YA,et al."Rapid and wide pH-independent ammonium-nitrogen removal using a composite hydrogel with three-dimensional networks".Chemical Engineering Journal 179(2012):90-98. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 20121799098.pdf（1163KB） | 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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