會議論文
| 學年 | 108 |
|---|---|
| 學期 | 1 |
| 發表日期 | 2019-12-11 |
| 作品名稱 | Cryolite (Na3AlF6) crystallization for fluoride recovery using an electrolytic process equipped with a sacrificail aluminum anode |
| 作品名稱（其他語言） | |
| 著者 | Vinh Ya; Chi-Wang Li |
| 作品所屬單位 | |
| 出版者 | |
| 會議名稱 | Deammonification and Environmental Technology and Management |
| 會議地點 | Bangkok, Thailand |
| 摘要 | An electro-crystallization process equipped with a sacrificial aluminum anode was operated under an optimum condition to promote the formation of crystalline cryolite for the recovery of fluoride from synthetic F-containing wastewater. The effects of pH, Al/F molar ratio, initial F concentration, and electrolytes were investigated experimentally, and the results were compared with data obtained from chemical equilibrium modeling. Cryolite was successfully produced under optimum pH values of 5 to 6 and Al/F molar ratios of less than 1/6. The F removal increased with increasing Al/F molar ratio until reaching the molar ratio of 1/6 and decreased thereafter due to the formation of AlFn3−n species. The adsorption of AlFn3−n by Al(OH)3 precipitates contributed part of F removal. The removal efficiency reached 100% when the initial fluoride concentration was high while it was around 90% with the low initial fluoride concentration. XRD and SEM/EDX analysis showed that the obtained solids matched well to the commercial cryolite. Finally, the operating costs of chemical-crystallization (the process with Al ions added chemically) and electro-crystallization were compared, and the cost of the former was less than the latter. Energy consumption was the main contributor to the operating cost of the electro-crystallization process. |
| 關鍵字 | Electro-crystallization;Cryolite;Fluoride;Recovery;Chemical equilibrium modeling |
| 語言 | en |
| 收錄於 | |
| 會議性質 | 國際 |
| 校內研討會地點 | 無 |
| 研討會時間 | 20191211~20191213 |
| 通訊作者 | |
| 國別 | THA |
| 公開徵稿 | |
| 出版型式 | |
| 出處 | |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118749 ) |