摘要
采用零价铁(Fe0)-厌氧微生物处理体系,以蒽醌染料活性艳蓝X-BR为处理对象,通过摇床试验研究了Fe0投加量、pH值等因素对染料脱色的影响,并对比了该染料在3种不同处理体系中的脱色效果.结果表明,在Fe0-厌氧微生物体系中,Fe0投加量和pH值均存在最适宜值,当两者分别控制在400mg/L和7,染料初始浓度和反应时间分别为100mg/L和68h时,该体系脱色率可达到90%以上;与相同反应条件下的纯Fe0、纯厌氧微生物体系相比,该体系的脱色率提高近40%.根据紫外-可见光谱分析,Fe0可有效促进厌氧微生物对X-BR及其中间产物的降解,实现完全脱色.其脱色符合准一级动力学,当染料初始浓度由50mg/L增至800mg/L时,反应速率常数k值由0.0470h-1降至0.0102h-1.
An anthraquinone dye,reactive brilliant blue X-BR,was treated by an integrated Fe0-anaerobic biological system. Through shake flasks tests,the effects of some factors,such as Fe0 dose,pH,etc.,on the decolorization of X-BR were studied. The decolorization effects of the dye in three different treatment systems were compared as well. The Fe0 concentration and pH had optimal values during the decolorization of X-BR in Fe0-anaerobic biological system. When Fe0 dose,initial pH value and X-BR concentration were 400mg/L,7 and 100 mg/L respectively,the decolorization rate of X-BR in the integrated system could reach up to 90% after 68 h reaction. Compared with pure Fe0 and pure microorganism treatment systems,it could be improved about 40% under the same experimental conditions. In addition,the analysis result of UV-vis spectrogram indicated that Fe0 could promote effectively biodegrading of anthraquinone dye X-BR and its intermediate products. The decolorization kinetics of X-BR was in accordance with pseudo first-order reaction dynamics and the reaction rate constant reduced from 0.0470h-1 to 0.0102h-1 with the dye concentration increased from 50mg/L to 800mg/L.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2010年第4期510-515,共6页
China Environmental Science
基金
湖南省科技厅资助项目(06SK4036)
湘潭大学博士启动基金(08QDZ31)
关键词
厌氧微生物
零价铁
活性艳蓝X-BR
染料
anaerobic microorganism
zero-valent iron
reactive brilliant blue X-BR
dye
