The influence mechanism of HCO3- on fluoride removal by different types of aluminum salts
文献类型：期刊论文
| 作者 | Wang, Bin; Xu, Hui ; Wang, Dongsheng; He, Shouyang
|
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2021-04-20 |
| 卷号 | 615页码:- |
| ISSN号 | 0927-7757 |
| 关键词 | HCO3- Al-13 Coagulation Defluorination ESI-TOF-MS |
| 英文摘要 | In order to study the influence mechanism of HCO3- on the fluoride removal by AlCl3 and Al-13, the residual fluoride concentration, residual aluminum concentration and pH value in coagulation effluent were measured at different HCO3- concentrations. Electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) was used to analyze the aluminum species in the supernatant after coagulation, and the flocs collected were analyzed by nuclear magnetic resonance (NMR) and X-ray photoelectron spectra (XPS). The results show that AlCl3 is used as a coagulant, when the concentration of HCO3- increases from 100 mg/L to 300 mg/L, Al3+ and HCO3- are double hydrolyzed to form Al(OH)(3) alum flower after adding AlCl3, and the removal rate of fluoride rapidly increases from 9.55 % to 78.0 %. When the concentration of HCO3- increases from 300 mg/L to 1000 mg/L, the precipitation of Al(OH)(3) will gradually dissolve to form Al(OH)(4) and the removal rate of fluoride drops from 78.0 % to 56.2 %. When Al-13 is used as a coagulant, with the increase of HCO3- from 100 mg/L to 1000 mg/L, its double hydrolysis with Al-F complexes is enhanced, resulting in the formed Al6F2, Al7F2 and Al9F3 gradually dissociate, and the removal rate of fluorine decreases from 78.8 % to 59.4 %. |
| WOS研究方向 | Chemistry, Physical |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46006]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Guizhou Univ, Minist Educ, Key Lab Karst Georesources & Environm, Guiyang 550025, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, 18 Shuangqing Rd, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Bin,Xu, Hui,Wang, Dongsheng,et al. The influence mechanism of HCO3- on fluoride removal by different types of aluminum salts[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2021,615:-. |
| APA | Wang, Bin,Xu, Hui,Wang, Dongsheng,&He, Shouyang.(2021).The influence mechanism of HCO3- on fluoride removal by different types of aluminum salts.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,615,-. |
| MLA | Wang, Bin,et al."The influence mechanism of HCO3- on fluoride removal by different types of aluminum salts".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 615(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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