Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment
文献类型：期刊论文
| 作者 | Zhao, Changwei; Yu, Ling; Xu, Lili; Yu, Yang |
| 刊名 | DESALINATION AND WATER TREATMENT
 |
| 出版日期 | 2020-03 |
| 卷号 | 181页码:369-375 |
| 关键词 | Arsenate Arsenite Coagulation Nanofiltration Enhanced removal efficiency Fouling mitigation |
| ISSN号 | 1944-3994 |
| 英文摘要 | Arsenic contamination has been considered as one of the serious environmental issues around the world. In this study, the conventional chemical coagulation was applied as pretreatment of the nanofiltration process to enhance the removal efficiency of arsenite (As(III)) and arsenate (As(V)) and mitigate the membrane fouling. Three types of coagulants including aluminum chloride (AlCl3), polyaluminium chloride and ferric chloride (FeCl3) were compared. More than 80% of As(V) could be removed by coagulation, nanofiltration, and their combined process, whereas nanofiltration or coagulation using aluminium-based coagulants only achieved approximately 10% of removal efficiency of As(III). FeCl3 was proven to be the most effective coagulant to remove both As(V) and As(III) with the removal efficiency of 99% and 95%, respectively. The coagulation pretreatment was able to significantly reduce the declining trend of water flux. The formed fouling layer on the membrane surface after the treatment was investigated by a field-emission scanning electron microscopy. Compared to the case of direct filtration of humic acid solution, a more loose and permeable fouling layer could be formed when coagulation was used as a pretreatment process. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44936]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhao, Changwei,Yu, Ling,Xu, Lili,et al. Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment[J]. DESALINATION AND WATER TREATMENT,2020,181:369-375. |
| APA | Zhao, Changwei,Yu, Ling,Xu, Lili,&Yu, Yang.(2020).Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment.DESALINATION AND WATER TREATMENT,181,369-375. |
| MLA | Zhao, Changwei,et al."Enhanced removal of arsenic and fouling mitigation of nanofiltration process via coagulation pretreatment".DESALINATION AND WATER TREATMENT 181(2020):369-375. |
入库方式： OAI收割
来源：生态环境研究中心
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