Electrochemical dechlorination of chloroacetic acids (CAAs) using hemoglobin-loaded carbon nanotube electrode
文献类型：期刊论文
| 作者 | Li, YP; Cao, HB; Zhang, Y |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2006-04-01 |
| 卷号 | 63期号:2页码:359-364 |
| 关键词 | chloroacetic acids reductive dechlorination hemoglobin carbon nanotube |
| ISSN号 | 0045-6535 |
| 其他题名 | Chemosphere |
| 中文摘要 | Hemoglobin (Hb) was immobilized on carbon nanotube (CNT) electrode to catalyze the dechlorination of chloroacetic acids (CAAs), and the electrocatalytic behaviors of the Hb-loaded electrode for the dechlorination of trichloroacetic acid (TCAA) were studied by cyclic voltammetry and constant-potential electrolysis technique. An Hb-loaded packed-bed flow reactor was also constructed for bioelectrocatalytic dechloriantion of CAAs from drinking water. The results showed that the reduced heme of Hb immobilized on CNT electrode was easily regenerated, and Hb exhibited a stable and high activity for reductive dechlorination of CAAs with significant lowering of overpotential. TCAA could be reduced at -0.450 V (vs. saturated calomel electrode (SCE)) with catalysis of Hb-loaded electrode and its dechlorination was stepwise, following the pathway of TCAA -> dichloroacetic acid (DCAA) -> monochloroacetic acid (MCAA) -> acetic acid. It was also found that all CAAs, e.g., TCAA, DCAA and MCAA, could be dechlorinated completely at -0.450 V. The removal of 30.0 mM TCAA and DCAA is ca. 40% and 31 % respectively, with electrolysis for 100 min at -0.600 V (vs. SCE) using the Hb-loaded packed-bed flow reactor. The dechlorination activities of CAAs follow the decreasing order: TCAA > DCAA > MCAA, and the average current effiency is over 90%. (c) 2005 Elsevier Ltd. All rights reserved. |
| 英文摘要 | Hemoglobin (Hb) was immobilized on carbon nanotube (CNT) electrode to catalyze the dechlorination of chloroacetic acids (CAAs), and the electrocatalytic behaviors of the Hb-loaded electrode for the dechlorination of trichloroacetic acid (TCAA) were studied by cyclic voltammetry and constant-potential electrolysis technique. An Hb-loaded packed-bed flow reactor was also constructed for bioelectrocatalytic dechloriantion of CAAs from drinking water. The results showed that the reduced heme of Hb immobilized on CNT electrode was easily regenerated, and Hb exhibited a stable and high activity for reductive dechlorination of CAAs with significant lowering of overpotential. TCAA could be reduced at -0.450 V (vs. saturated calomel electrode (SCE)) with catalysis of Hb-loaded electrode and its dechlorination was stepwise, following the pathway of TCAA -> dichloroacetic acid (DCAA) -> monochloroacetic acid (MCAA) -> acetic acid. It was also found that all CAAs, e.g., TCAA, DCAA and MCAA, could be dechlorinated completely at -0.450 V. The removal of 30.0 mM TCAA and DCAA is ca. 40% and 31 % respectively, with electrolysis for 100 min at -0.600 V (vs. SCE) using the Hb-loaded packed-bed flow reactor. The dechlorination activities of CAAs follow the decreasing order: TCAA > DCAA > MCAA, and the average current effiency is over 90%. (c) 2005 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Environmental Sciences |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | HALOACETIC ACIDS ; REDUCTION ; WATER |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000236989600022 |
| 公开日期 | 2013-10-24 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3965]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Lab Green Proc & Engn, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 10039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, YP,Cao, HB,Zhang, Y. Electrochemical dechlorination of chloroacetic acids (CAAs) using hemoglobin-loaded carbon nanotube electrode[J]. CHEMOSPHERE,2006,63(2):359-364. |
| APA | Li, YP,Cao, HB,&Zhang, Y.(2006).Electrochemical dechlorination of chloroacetic acids (CAAs) using hemoglobin-loaded carbon nanotube electrode.CHEMOSPHERE,63(2),359-364. |
| MLA | Li, YP,et al."Electrochemical dechlorination of chloroacetic acids (CAAs) using hemoglobin-loaded carbon nanotube electrode".CHEMOSPHERE 63.2(2006):359-364. |
入库方式： OAI收割
来源：过程工程研究所
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