| 介体厌氧催化活性艳红K-2BP脱色及构效特性研究 |
| 摘要点击 2873 全文点击 2441 投稿时间：2010-07-03 修订日期：2010-08-31 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 氧化还原介体 构效关系 活性艳红K-2BP 催化 脱色 |
| 英文关键词 redox mediator structure-activity reactive brilliant red K-2BP catalysis decolorization |
|
| 中文摘要 |
| 研究了筛选出的4种结构相似的醌类氧化还原介体对活性艳红K-2BP厌氧脱色的促进作用,并分析了介体促进效果与其化学结构活性相关性. 在35℃中温厌氧条件下,采用间歇批量实验法,测定不同体系中介体催化活性艳红K-2BP脱色效果.结果表明,①结构相似的醌类氧化还原介体蒽醌(AQ)、1,5-二氯蒽醌(1,5-AQ)、1,8-二氯蒽醌(1,8-AQ)和1,4,5,8-四氯蒽醌(1,4,5,8-AQ),均促进活性艳红K-2BP脱色,反应速率提高了1.4～3倍；②当醌类介体投加浓度为4 mmol·L-1，活性艳红K-2BP染料浓度为300 mg·L-1时,促进作用由大到小的顺序为:1,8-AQ>1,5-AQ>AQ>1,4,5,8-AQ；③ 当活性艳红K-2BP染料浓度为300 mg·L-1时,1,8-AQ促进效果最佳且脱色速率常数随1,8-AQ浓度的增加而增加呈线性关系；④介体促进效果与介体取代基团数量、位置和电子共轭效应相关.本研究初步建立了氧化还原介体定性/定量构-效关系数学模型,探究和完善非水溶性氧化还原介体催化强化理论体系. |
| 英文摘要 |
| Four selected quinone redox mediators with similar structure were conducted to accelerate reactive brilliant red K-2BP decolorization, and the accelerating structure-activity of redox mediators on the decolorization was also studied. Batch experiments were carried out to determine the catalyst effect on the decolorization of reactive brilliant red K-2BP with temperature of 35℃ and under anaerobic conditions.The experiment results suggested that ① four similar chemical structure redox mediators ［1,4,5,8-Tetrachloroanthraquinone(1,4,5,8-AQ), Anthraquinone(AQ), 1,8-Dichloroanthraquinone(1,8-AQ), 1,5-Dichloroanthraquinone(1,5-AQ)］, all accelerated the decolorization rate of reactive brilliant red K-2BP and the reaction rate was enhanced 1.4-3 times; ② the accelerating order was 1,8-AQ>1,5-AQ>AQ>1,4,5,8-AQ at the quinone mediator concentration of 4 mmol·L-1 and reactive brilliant red K-2BP concentration of 300 mg·L-1; ③ under the reactive brilliant red K-2BP concentration of 300 mg·L-1, 1,8-AQ had best accelerating effect,and the relationship between decoloring rate constants and 1,8-AQ concentration; ④ and the mediator acclerating effects also related to substituent positioning effects and conjugated effects. The structure-activity mathematical model of redox mediators was put forward, which could improve water-insoluble redox mediators catalytic strengthening theory system. |
|
|
|
