{"title":"Efficient phosphorus recovery from simulated phosphoric acid wastewater using a tailored dual-module flow electrode capacitive deionization (FCDI) strategy","authors":"","doi":"10.1016/j.resconrec.2024.107867","DOIUrl":null,"url":null,"abstract":"<div><p>The complex and unstable thermodynamic equilibrium of phosphoric acid wastewater (PAWW) has posed big challenges to conventional phosphorus (P) recovery methods via chemical precipitation process. This study proposes a tailored P recovery strategy from PAWW based on a dual-module flow electrode capacitive deionization (FCDI) system, which includes a P recovery module and a desalination module. The dual-module FCDI system efficiently separates P from impurities in simulated PAWW, through unique flow electrode circulations. And it demonstrates reasonable electrical energy consumption for P recovery of 2.45 kWh/kg P (constant voltage of 1.2 V). Over a continuous operation of the dual-module FCDI system for approximately 26.5 h, a P-enriched solution (8298 mg P/L) is successfully recovered from simulated PAWW, and then high-purity vivianite (Fe<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>‧8H<sub>2</sub>O) product is synthesized. The P recovery efficiency of the whole process reaches 78.66 %. This study provides an environmentally friendly strategy to recover P from PAWW based on FCDI technology.</p></div>","PeriodicalId":21153,"journal":{"name":"Resources Conservation and Recycling","volume":null,"pages":null},"PeriodicalIF":11.2000,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Resources Conservation and Recycling","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921344924004609","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
The complex and unstable thermodynamic equilibrium of phosphoric acid wastewater (PAWW) has posed big challenges to conventional phosphorus (P) recovery methods via chemical precipitation process. This study proposes a tailored P recovery strategy from PAWW based on a dual-module flow electrode capacitive deionization (FCDI) system, which includes a P recovery module and a desalination module. The dual-module FCDI system efficiently separates P from impurities in simulated PAWW, through unique flow electrode circulations. And it demonstrates reasonable electrical energy consumption for P recovery of 2.45 kWh/kg P (constant voltage of 1.2 V). Over a continuous operation of the dual-module FCDI system for approximately 26.5 h, a P-enriched solution (8298 mg P/L) is successfully recovered from simulated PAWW, and then high-purity vivianite (Fe3(PO4)2‧8H2O) product is synthesized. The P recovery efficiency of the whole process reaches 78.66 %. This study provides an environmentally friendly strategy to recover P from PAWW based on FCDI technology.
期刊介绍:
The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns.
Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.