期刊論文
| 學年 | 114 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2026-04-07 |
| 作品名稱 | Chloride-assisted electro-oxidation for phosphorus recovery from acidic wastewater via ferric phosphate precipitation |
| 作品名稱（其他語言） | |
| 著者 | Titima Wongphoom; Quyen Le Thuy; Naresh Mameda; Yu-Han Lin; Vinh Ya; Chi-Wang Li; Tran Quang Tuan; Khac-Uan Do; Nhu Nguyet Phan; Chu Xuan Quang |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Separation and Purification Technology p.137897 |
| 摘要 | Recovering phosphorus from acidic wastewater remains challenging because the highly soluble phosphate is complex to precipitate. This study presents an electro-oxidation precipitation route that converts ferrous (Fe(II)) to ferric (Fe(III)) using in-situ generated reactive chlorine species (RCS), enabling efficient ferric phosphate formation at low pH. The roles of Fe(II) sources, pH, current density, and Fe(II):P ratios were systematically evaluated to clarify the governing mechanism and optimize process performance. In chloride-containing systems, RCS accelerated Fe(II) conversion and enhanced phosphorus removal, achieving up to 98% recovery with a clear correlation between oxidation-reduction potential (ORP) and Fe(II) conversion. pH control (1.7–1.9) improved process stability, minimized competing reactions, and significantly enhanced sludge settleability. Higher current densities shortened the reaction time for complete Fe(II) oxidation, while increased Fe(II):P ratios compensated for Fe loss at the cathode, maintaining the stoichiometric 1:1 Fe:P precipitation behavior. The process costs more than electrochemical crystallization process that produces vivianite (E-Vivianite) due to high energy and iron expenses, but optimization and ferric phosphate's higher value yield economic benefits for acidic wastewater and batteries. Characterization of the recovered solids confirmed the transformation of amorphous FePO4 into a highly crystalline, thermally stable form of FePO4 after calcination, making it suitable for energy-storing applications. Overall, this work demonstrates a robust strategy for phosphorus removal from highly acidic wastewater while producing value-added ferric phosphate materials. |
| 關鍵字 | Electro-oxidation;Ferric phosphate;Lithium ferric phosphate;Reactive chlorine species;Phosphorus recovery |
| 語言 | en |
| ISSN | |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | VINH YA |
| 審稿制度 | 否 |
| 國別 | NLD |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/129223 ) |