Coagulation removal of phosphorus from a southern China reservoir in different stages of algal blooms: Performance evaluation and Al-P matching principle analysis
文献类型：期刊论文
| 作者 | Wang, Xi; Xu, Hui ; Jiao, Ruyuan; Ma, Gefei; Wang, Dongsheng
|
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021-08-15 |
| 卷号 | 782页码:- |
| 关键词 | Coagulation Al-13 Algal blooms Particulate phosphorus Dissolved phosphorus |
| ISSN号 | 0048-9697 |
| 英文摘要 | Due to excessive nutrient discharge, many reservoirs in southern China suffer from eutrophication and harmful algal blooms. Several methods for phosphorus (P) removal have been proposed, including coagulation, adsorption, and biological methods. Among these methods, coagulation is preferable because of its quick effect, simple operation, and low cost. To investigate the effect and mechanism of coagulation on dephosphorization in reservoir water, the performances of Al-based (AlCl3 and polyaluminum chloride (PACl)) and Fe-based coagulants (FeCl3 and FeSO4) were evaluated in this work. For reservoir water with a total phosphorus (TP) concentration of approximately 0.080 mg/L, aluminum salts showed stable advantages in dephosphorization. AlCl3 reduced the TP level by over 90% when treating the water sample collected at the initial stage of algal blooms, and PACl reduced by over 80% during the blooming stage. To reveal the dephosphorization mechanism and Alsingle bondP matching principle, synthesized water samples were prepared and treated with AlCl3 and [AlO4Al12(OH)(24)(H2O)(12)](7+) (Al-13). While simulating the water quality characteristics of reservoir water, important influencing factors were considered. The factors include P content (dissolved phosphorus (DP) and particulate phosphorus (PP)), pH, and extracellular organic matter (EOM). The pH was set to 7.66 and 8.29, with PP proportion set to 20%, 50%, and 80%. Simulated water treatment results indicated that, except for the coagulants species, pH significantly affected the dephosphorization efficiency. Moreover, the effects of P speciation and EOM were confirmed. Based on the coagulation performance and coagulation product characterization, chemical precipitation and inner-sphere complexation were estimated to be the most predominant way that DP and PP match with Al and were efficiently removed by Al-based coagulants. (C) 2021 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45918]  |
| 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 | Wang, Xi,Xu, Hui,Jiao, Ruyuan,et al. Coagulation removal of phosphorus from a southern China reservoir in different stages of algal blooms: Performance evaluation and Al-P matching principle analysis[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,782:-. |
| APA | Wang, Xi,Xu, Hui,Jiao, Ruyuan,Ma, Gefei,&Wang, Dongsheng.(2021).Coagulation removal of phosphorus from a southern China reservoir in different stages of algal blooms: Performance evaluation and Al-P matching principle analysis.SCIENCE OF THE TOTAL ENVIRONMENT,782,-. |
| MLA | Wang, Xi,et al."Coagulation removal of phosphorus from a southern China reservoir in different stages of algal blooms: Performance evaluation and Al-P matching principle analysis".SCIENCE OF THE TOTAL ENVIRONMENT 782(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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