施氏矿物催化降解4-氯苯酚性能研究

Research on the Schwertmannite catalyzed degradation of 4-chlorophenol

本文选取人工合成施氏矿物作为类芬顿催化剂在过氧化氢的作用下催化降解4-氯苯酚,通过考察pH值,过氧化氢,催化剂施氏矿物用量因素的影响.研究结果表明,当反应溶液pH为3,过氧化氢的浓度为500mg/L,施氏矿物用量1g/L,30min中可以完全降解100mg/L的4-氯苯酚,证明施氏矿物是高效的非均相催化剂.研究发现反应遵循自由基反应机理,施氏矿物催化分解过氧化氢产生羟基自由基进而实现催化降解4-氯苯酚.

In this study, Schwertmannite（sch.）was artificially synthesized and tested in heterogeneous activation of H_2O_2 for4-chlorophenol（4-CP）degradation in aqueous solutions. The effect of different operational parameters such as suspension p H,initial concentrations of H_2O_2, and Schwertmannite dosage were evaluated. Degradation efficiency of 100% was reached at the initial 4-CP concentration of 100 mg/L, H_2O_2 concentration of 500 mg/L, pH of 3, catalyst dosage of 1 g/L and reaction time of30 min, which demonstrated that the catalyst was an excellent efficient heterogeneous Fenton-like catalyst. The degradation of4-CP was predominated by the hydroxyl radical which was formed from the H_2O_2 decomposition.