Adsorptive removal of phosphate from secondary effluents in WWTPs by ZnAl layered double hydroxides granules
文献类型：期刊论文
| 作者 | Chen, Xuelin1; Cheng, Xiang1; Sun, Dezhi1; Ma, Weifang1; Wang, Xingzu2
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| 刊名 | DESALINATION AND WATER TREATMENT
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| 出版日期 | 2015-05-01 |
| 卷号 | 54期号:4-5页码:1216-1225 |
| 关键词 | Secondary effluent Phosphate Granule Layered double hydroxides Adsorption |
| ISSN号 | 1944-3994 |
| DOI | 10.1080/19443994.2014.950338 |
| 通讯作者 | Cheng, X (reprint author), Beijing Forestry Univ, Coll Environm Sci & Engn, 35 Tsinghua East Rd, Beijing 100083, Peoples R China. |
| 英文摘要 | Granular ZnAl layered double hydroxides (LDHs) were prepared to study the possible application of the material in phosphate removal from secondary effluents in wastewater treatment plants. The structural and phosphate adsorption properties of LDHs granules were compared with those of powder LDHs. The results of powder X-ray diffraction and Fourier transform infrared spectra show that polyvinyl alcohol as a binding agent did not change the interlayer distance of ZnAl LDHs or interact with the hydroxyl layers or interlayer anions. Although the distribution of pore size in granular ZnAl LDHs was similar to that in powder samples, the total pore volume and Brunauer-Emmett-Teller specific surface area decreased by 68.2% and 63.1%, respectively, after granulation. The phosphate adsorption capacity of granular ZnAl LDHs was to some extent lowered compared with that of LDHs powder; nevertheless, the decrease was not proportional to the reduction in the specific surface area, suggesting that physical surface adsorption was not a major pathway of phosphate uptake by ZnAl LDHs. Phosphate adsorption onto ZnAl LDHs powder was basically a two-step process: a fast uptake in 1 h and a slower uptake afterward, which fit well to pseudo-first-order models and pseudo-second-order models, respectively. Phosphate uptake by granular LDHs, however, had better agreements with intra-particle diffusion models during the entire contact time, indicating that mass transfer became the rate-limiting step in phosphate adsorption after LDHs granulation. |
| 资助项目 | Fundamental Research Funds for the Central Universities[TD-JC-2013-3] ; National Natural Science Foundation of China[51008023] ; National Natural Science Foundation of China[51008025] |
| WOS研究方向 | Engineering ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000352305200044 |
| 出版者 | TAYLOR & FRANCIS INC |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/1561]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Cheng, Xiang |
| 作者单位 | 1.Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 401122, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Xuelin,Cheng, Xiang,Sun, Dezhi,et al. Adsorptive removal of phosphate from secondary effluents in WWTPs by ZnAl layered double hydroxides granules[J]. DESALINATION AND WATER TREATMENT,2015,54(4-5):1216-1225. |
| APA | Chen, Xuelin,Cheng, Xiang,Sun, Dezhi,Ma, Weifang,&Wang, Xingzu.(2015).Adsorptive removal of phosphate from secondary effluents in WWTPs by ZnAl layered double hydroxides granules.DESALINATION AND WATER TREATMENT,54(4-5),1216-1225. |
| MLA | Chen, Xuelin,et al."Adsorptive removal of phosphate from secondary effluents in WWTPs by ZnAl layered double hydroxides granules".DESALINATION AND WATER TREATMENT 54.4-5(2015):1216-1225. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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