氧化还原介体对偶氮染料厌氧脱色的影响  

Effects of Different Redox Mediators on the Anaerobic Reduction of Azo Dyes

作　　者：崔姗姗[1] 徐宏勇[1] 周思辰[1] 钟珍芳[1] 刘勇弟[1] 

机构地区：[1]华东理工大学资源与环境工程学院,上海200237

出　　处：《哈尔滨理工大学学报》2008年第2期103-106,共4页Journal of Harbin University of Science and Technology

摘　　要：在35℃温厌氧条件下,采用间歇批量实验法,通过测定不同体系中酸性橙Ⅱ(AO7)脱色情况,研究了氧化还原介体2-磺酸钠蒽醌(AQS)、2,6-二磺酸钠蒽醌(AQDS)、对苯醌(BQ)、核黄素(VB2)和硫堇(Thio)对厌氧脱色体系的影响.结果表明,QDS与AQS对染料降解的促进效果最佳,反应速率常数分别提高了199%和760%,BQ的反应速率常数仅提高了14.1%;当氧化还原介体投加浓度为0.1 m mol.L-1时,促进作用由大到小的排列顺序为:AQDS>AQS>VB2>Thio>BQ.促进效果因介体氧化还原电位、浓度、微生物种群结构的不同而有所差异.The impact of different redox mediators on anaerobic decolourisation of azo dye was investigated in batch assays. The results indicated that the quinoid redox mediators anthraquinone - 2,6 - disulfonate （AQDS） and anthraquinone- 2 -sulfonate （AQS） could accelerate decolourisation, increasing decolourisation rates up to 199 percent and 760 percent compared with the mediator- free incubations respectively, 1, 4 -benzoquinone （ BQ）, only 14. 1 percent. Riboflavin and thionine were also tested. It indicated that 0. 1 m mol · L^- 1 redox medi- ators had different effects on the decolourisation, while AQDS 〉 AQS 〉 riboflavin （ VB2 ） 〉 thionine 〉 BQ. The effects of redox mediators were affected by the redox potential, concentration and microbial population.

关 键 词：氧化还原介体 偶氮染料 脱色 厌氧 

分 类 号：X505[环境科学与工程—环境工程]