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.
出处
《哈尔滨理工大学学报》
CAS
2008年第2期103-106,共4页
Journal of Harbin University of Science and Technology
关键词
氧化还原介体
偶氮染料
脱色
厌氧
redox mediator
azo dye
decolourisation
anaerobic
