作　　者： ; ; ; ;

机构地区： 广东工业大学轻工化工学院

出　　处： 《精细化工》 2011年第3期275-279,共5页

摘　　要： 采用溶胶凝胶法制得Birnessite(Bir)型氧化锰,并对阳离子黄X-5GL的模拟染料废水进行脱色研究。在考察废水处理体系初始pH、Bir型氧化锰用量等影响因素的基础上,进一步考察了Mg2+、Ca2+及重金属离子(Pb2+、Cd2+、Hg2+)对脱色效果的影响。结果表明,Bir型氧化锰对阳离子黄X-5GL具有很好的脱色效果。当pH=2.5、Bir型氧化锰为5 mg时,反应5 min脱色率即达到98%;Mg2+、Ca2+及重金属离子(Pb2+、Cd2+、Hg2+)对脱色效果均无明显影响。pH=2.5时的降解反应近似为一级反应,反应速率常数为0.206 9 min-1。 A study on the decolorization of a cationic dye,Cationic Yellow X-5GL,was carried out using birnessite-type manganese oxides prepared by method of sol-gel.On the basis of investigating the influences of factors such as initial pH,the dose of birnessite-type manganese oxides,a further study was carried out in relation to the influence of Mg2＋,Ca2＋,and heavy metal ions（Pb2＋,Cd2＋,Hg2＋） on the effect of decolorization.The results show that birnessite-type manganese oxides have significant decolorization effect on Cationic Yellow X-5GL.The decolorization ratio can reach 98% within five minutes when pH is 2.5 and the dose of manganese oxides is 5 mg.The above mentioned metal ions have no obvious effect on the decolorization of the dye.The decomposition rate at pH 2.5 nearly follows first-order kinetics and the reaction rate constant is 0.206 9 min-1.

关 键 词： 型氧化锰 阳离子染料 脱色 金属离子 水处理技术

领　　域： [环境科学与工程] [理学] [理学]