Kinetics, isotherms and multiple mechanisms of the removal for phosphate by cl-hydrocalumite
文献类型：期刊论文
| 作者 | Jia, Yunsheng1,2; Wang, Huoyan1; Zhao, Xuesong3; Liu, Xiaowei1,2; Wang, Yiliu1; Fan, Qunlong3; Zhou, Jianmin1 |
| 刊名 | Applied clay science
 |
| 出版日期 | 2016-08-01 |
| 卷号 | 129页码:116-121 |
| 关键词 | Hydrocalumite Phosphate adsorption Topotactic anion exchange Dissolution reprecipitation Brushite |
| ISSN号 | 0169-1317 |
| DOI | 10.1016/j.clay.2016.05.018 |
| 通讯作者 | Wang, huoyan(hywang@issas.ac.cn) |
| 英文摘要 | A laboratory study was conducted to evaluate phosphate removal from aqueous solutions by a caal-cl layered double hydroxide (cl-hydrocalumite). cl-hydrocalumite was prepared by co-precipitation and was characterized by scanning electron microscopy equipped with energy-dispersive spectrometer (sem-eds), powder x-ray diffraction (pxrd), and fourier transform infrared (ftir). sem demonstrated that a crystalline structure was synthesized and pxrd or ftir spectra revealed that the structure was cl-hydrocalumite. adsorption experiments were performed as a function of contact time and initial phosphate concentration. phosphate adsorption reached equilibrium within 10 h, followed by a pseudo-second-order kinetic model with r-2 = 0.999. the experimental data followed the langmuir and fedlich-peterson isotherm models, and showed a maximum adsorption capacity of similar to 182.5 mg g(-1). the freundlich constant n = 3.18 > 1, represented a favorable phosphate adsorption process. sem-eds, pxrd, and ftir analyses of p-hydrocalumite (after adsorption) were used to elucidate adsorption mechanisms. eds results indicated that chloride was topotactic, exchanged by phosphate to generate p-hydrocalumite, and partial cl-hydrocalumite was dissolved. the pxrd and ftir spectra indicate that p-hydrocalumite was a mixture with a new precipitate, brushite. phosphate adsorption by cl-hydrocalumite was topotactic anion exchange combined with dissolution-precipitation. cl-hydrocalumite was a cost-effective and excellent phosphate adsorbent. (c) 2016 elsevier b.v. all rights reserved. |
| WOS关键词 | LAYERED DOUBLE HYDROXIDES ; AQUEOUS-SOLUTION ; OXO-ANIONS ; ADSORPTION ; WATER ; FLUORIDE ; ADSORBENTS ; MODELS ; OXIDE ; MG |
| WOS研究方向 | Chemistry ; Materials Science ; Mineralogy |
| WOS类目 | Chemistry, Physical ; Materials Science, Multidisciplinary ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000379372600017 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374671 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, Huoyan |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Jiangsu Longchang Chem Co Ltd, Nantong 226500, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Yunsheng,Wang, Huoyan,Zhao, Xuesong,et al. Kinetics, isotherms and multiple mechanisms of the removal for phosphate by cl-hydrocalumite[J]. Applied clay science,2016,129:116-121. |
| APA | Jia, Yunsheng.,Wang, Huoyan.,Zhao, Xuesong.,Liu, Xiaowei.,Wang, Yiliu.,...&Zhou, Jianmin.(2016).Kinetics, isotherms and multiple mechanisms of the removal for phosphate by cl-hydrocalumite.Applied clay science,129,116-121. |
| MLA | Jia, Yunsheng,et al."Kinetics, isotherms and multiple mechanisms of the removal for phosphate by cl-hydrocalumite".Applied clay science 129(2016):116-121. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。