School of Chemical Engineering, China University of Petroleum, Changping District, Beijing, China.
J Hazard Mater. 2010 Sep 15;181(1-3):602-8. doi: 10.1016/j.jhazmat.2010.05.055. Epub 2010 May 21.
Decolorization of Acid Red GR by a newly isolated biphenyl-degrading bacterium, Dyella ginsengisoli LA-4 was presented in this paper. The optimal decolorization conditions were determined by response surface methodology (RSM) based on the rotatable central composite design. The results indicated that strain LA-4 possessed the highest decolorizing activity under anaerobic conditions with inoculation amount 6.49%, pH 7.06 and temperature 29 degrees C. Some ions such as Cu(2+), Zn(2+) could inhibit the decolorization, whereas 1 mmol/L of Mg(2+), Ca(2+), Co(2+), Fe(3+), Ni(2+) and Mn(2+) had no effects on the process. It was demonstrated that anthraquinone as a redox mediator could significantly accelerate the reduction process of azo dyes.
本文报道了一株新分离的联苯降解菌——人参丹氏杆菌 LA-4 对偶氮染料酸性红 GR 的脱色作用。利用基于旋转中心组合设计的响应面法确定了最佳脱色条件。结果表明，在厌氧条件下，LA-4 菌株的接种量为 6.49%、pH 值为 7.06、温度为 29°C 时具有最高的脱色活性。一些离子如 Cu(2+)、Zn(2+)对脱色有抑制作用，而 1mmol/L 的 Mg(2+)、Ca(2+)、Co(2+)、Fe(3+)、Ni(2+)和 Mn(2+)对该过程没有影响。证明蒽醌作为一种氧化还原介体可以显著加速偶氮染料的还原过程。
