CAS OpenIR
Phosphate recovery from aqueous solution via struvite crystallization based on electrochemical-decomposition of nature magnesite
Li, Xuewei1,2; Zhao, Xu2; Zhou, Xiaowen3; Yang, Bo1
2021-04-10
Source PublicationJOURNAL OF CLEANER PRODUCTION
ISSN0959-6526
Volume292Pages:10
AbstractStruvite crystallization was considered to be one of the most promising ways for phosphate recovery. However, the cost of struvite recovery process was too high to be economically attractive. In this work, electrochemical-decomposition of nature magnesite was designed to economically supply magnesium and base for synthesizing struvite, and recover phosphate from aqueous solution. The continuous release of magnesium ions from solid magnesite was achieved by electrochemical action, accompanying by the generation of alkaline solution (pH: 9.0-10.8). The results showed that the electrochemical-decomposition strategy was effective to recover phosphate from aqueous solution as struvite. The key factors of phosphate recovery including current, feed rate, the molar ratio of NIP, initial concentration of phosphate and ammonium, influent pH and plate distance. For a 21-day continuous operation, the recovery rate of phosphate was between 86.6% and 93.3%, confirming the stability of the process. The economic evaluation showed that the proposed electrochemical-decomposition process can reduce the cost of phosphate recovery by up to 60% compare with the traditional chemical process, which using MgSO4 center dot 7H(2)O and NaOH. The struvite with typical orthorhombic crystals was obtained from the bottom of the glass container where the effluent was collected, indicating that part of the ammonium in the solution was also recovered. It was considered that the proposed process may be beneficial to increase the profitability of magnesite mining companies and wastewater treatment plants through sellingbuying magnesite material, and subsequent use as a cheaper magnesium source for struvite precipitation. (C) 2021 Elsevier Ltd. All rights reserved.
KeywordPhosphate recovery Magnesite Electrochemistry Struvite Cost-effective
DOI10.1016/j.jclepro.2021.126039
Language英语
WOS Research AreaScience & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
WOS SubjectGreen & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
WOS IDWOS:000635409000010
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48232
Collection中国科学院过程工程研究所
Corresponding AuthorYang, Bo
Affiliation1.Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518061, Guangdong, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Xuewei,Zhao, Xu,Zhou, Xiaowen,et al. Phosphate recovery from aqueous solution via struvite crystallization based on electrochemical-decomposition of nature magnesite[J]. JOURNAL OF CLEANER PRODUCTION,2021,292:10.
APA Li, Xuewei,Zhao, Xu,Zhou, Xiaowen,&Yang, Bo.(2021).Phosphate recovery from aqueous solution via struvite crystallization based on electrochemical-decomposition of nature magnesite.JOURNAL OF CLEANER PRODUCTION,292,10.
MLA Li, Xuewei,et al."Phosphate recovery from aqueous solution via struvite crystallization based on electrochemical-decomposition of nature magnesite".JOURNAL OF CLEANER PRODUCTION 292(2021):10.
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