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化工学报  2015 

Si-FeOOH/H2O2类芬顿降解盐酸四环素废水的效能及其机理

DOI: 10.11949/j.issn.0438-1157.20150047, PP. 4244-4251

Keywords: 类芬顿,Si-FeOOH,盐酸四环素废水,过氧化氢

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Abstract:

采用碱沉法制备的Si-FeOOH作为非均相类芬顿催化剂,研究其催化降解盐酸四环素废水的效能,考察了催化剂投量、pH、过氧化氢加入量对盐酸四环素降解效能和反应速率的影响。实验结果表明:在催化剂投加量3.0g·L-1、H2O2投加量9.9mmol·L-1、pH为3、室温[(25±1)℃]的条件下,盐酸四环素降解率为90%,一级反应速率常数为0.0504min-1。与催化剂FeOOH相比,类芬顿催化剂Si-FeOOH性能更卓越。同时采用探针化合物正丁醇、苯醌,证明了Si-FeOOH/H2O2催化体系中的氧化活性种主要为羟基自由基(·OH)和超氧自由基(HO2·),并推测了其催化反应机理。

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