期刊論文
| 學年 | 114 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2026-06-11 |
| 作品名稱 | An integrated iron electrolysis-electrooxidation for phosphorus recovery as ferric phosphate |
| 作品名稱（其他語言） | |
| 著者 | Vinh Ya; Naresh Mameda |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Journal of Water Process Engineering 90, p. 110383 |
| 摘要 | This study develops an integrated electrodissolution-electrooxidation (ED-EO) process for recovering phosphorus (P) as high-purity ferric phosphate (FePO4) from synthetic acidic phosphate-containing wastewater representative of industrial effluents from semiconductor manufacturing, fertilizer production, and lithium-ion battery-related industries. A sacrificial iron anode releases ferrous (Fe2+) via electro-dissolution (ED), while a Ti/RuO2-IrO2 anode generates in-situ reactive chlorine species (RCS) in the sodium chloride electrolyte to oxidize Fe2+ to ferric (Fe3+), enabling stoichiometric FePO4 precipitation without external oxidants. Process optimization demonstrated that controlled acidic conditions (pH 1.6–2.0), ED current densities of 2.55–7.60 mA/cm2, and Cl−:P molar ratio ≥ 1:1 achieved >99% phosphorus removal at Fe:P ≈ 1:1, with superior settleability (sludge volume index of 111 mL/g P). Iron generation aligned with Faraday's law initially, while prolonged operation at elevated current densities resulted in experimental Fe concentrations slightly exceeding theoretical predictions, suggesting the presence of parallel non-faradaic chemical dissolution pathways under acidic chloride conditions. Multi-technique characterization (XRD, SEM-EDS, and XPS) confirmed the formation of amorphous hydrated FePO4 that transformed into a crystalline, a high-purity FePO4 precursor material for potential lithium-ion battery applications upon calcination at 600 °C. Operational costs were primarily energy-driven and comparable to those of electrochemical vivianite production, while the higher-value FePO4 product (∼3.8 USD/kg) was produced. The reagent-free, single-compartment configuration enhances process controllability and scalability, offering a viable strategy for sustainable phosphorus recovery. |
| 關鍵字 | Electro-dissolution; Electro-oxidation; Ferric Phosphate; Phosphorus recovery; Semiconductor |
| 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/987654321/129336 ) |