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論文
【年度】103
年研發成果
【項目】
論文
【領域】
關鍵技術科專
【類別】
生醫材化
| 計畫名稱 | 奈米材料及製程技術發展第二期計畫 | | 論文名稱 | A potential chemical oxo-precipitation (COP) technology for the remediation of high boron concentration wastewater using H2O2/Ba(OH)2 at room temperature | | 論文類型 | 研討會 | | 發表處 | International Conference on Applied Energy (2014) | | 發表人 | Jui-Yen Lin, Yu-Jen Shih, Yao-Hui Huang and Po-Yen Chen | | 發表日期 | 2014/05/30 | | 國家 | 國內 | | 內容摘要 | Among current technologies for boron removal, the chemical precipitation is extensively used for treating wastewater containing high boron concentration. The requirement of heating and huge amounts of coagulant limits the efficiency of the chemical precipitation. Thus, this work developed a chemical oxo-preceipitation (COP), which used hydrogen peroxide (H2O2) as the oxidant and barium hydroxide (Ba(OH)2) as the precipitant to substantially improve the chemical precipitation of wastewater with high boron concentration at room temperature. Under the appropriate conditions (pHi 9, mole ratio of H2O2/B = 2, and mole ratio of Ba/B = 0.8), boron can be efficiently removed from solution by forming the amorphous precipitates of barium perborate. After 4 hours, the transformation of amorphous barium perborate to a specifc species with crystalline phase occurred. Consequently, the boron concentration was reduced from 1000 ppm-B to 2 ppm-B after 6 hours. The characterization results of XRD, Raman spectrum, and ICP show that the precipitate was constituted by a dinuclear perborate with double peroxo bridges of which the chemical formula was supposed to be BaB2(O2)2(OH)4-n(OOH)n. |
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