活性艳红X-3B的厌氧生物降解与机理

Anaerobic biodegradation and mechanism of Reactive Brilliant Red X-3B

以活性艳红X-3B(RBR)为研究对象,分3个不同浓度组研究其在厌氧颗粒污泥作用下的降解性能,并采用生物降解动力学方程拟合其降解过程,同时利用GC-MS分析RBR的生物降解途径.试验结果表明,RBR在厌氧颗粒污泥中降解性能很好,去除率可达93.67%,且其降解过程符合二级反应动力学,其半衰期约为3.561 h.从GC-MS和UV-可见光谱的分析得出,RBR在厌氧颗粒污泥的作用下偶氮键断裂,且生成的芳香胺类化合物进一步降解为小分子的烃类、酚类、醇类和脂类化合物.

The degradation of Reactive Brilliant Red X-3B（RBR） in anaerobic granular sludge was studied with three different RBR concentrations.And the degradation process was fitted by biodegradation kinetics equation.GC-MS was used to monitor the degradation process of RBR.Experimental results show that RBR was easy to degrade in anaerobic granular sludge with the removal rate up to 93.67%.The biodegradation process accords with the second-order reaction kinetics,and its half-life is about 3.561 h.GC-MS and UV-visible spectrum analysis results show that azo bond of RBR was broken under the action of anaerobic granular sludge,to generate aromatic amines which were further degraded to smaller molecular compounds such as hydrocarbons,polyenols,alcohols and lipids.