TiO_2光催化氧化降解溴氨酸废水研究

Study on degradation of bromamine acid wastewater by titania photocatalytic oxidation

采用TiO2光催化氧化降解蒽醌染料中间体——溴氨酸废水,对催化剂TiO2的浓度、溶液pH值、电子捕获剂过硫酸铵浓度、光照强度和光照时间等影响因素进行了研究,并探讨了其降解的动力学过程.试验表明:TiO2光催化氧化法能有效地降解该废水,使其CODCr和色度均可显著降低;在选定条件下降解过程遵循准一级动力学规律,表观反应速率常数为0.

The bromamine acid wastewater was degradated by titania photocatalytic oxidation. The concentration of titania, pH of solution, concentration of （ NH4 ）2S2O8, intensity and time of ultraviolet light were investigated. The dynamical process of the degradation was discussed. The experiment results show that the method of titania photocatalytic oxidation could effectively degrade the wastewater, also the CODer and the chroma can be obviously reduced. Under the selected condition, the degradation process follows the rule of quasi-first-grade dynamics, and the rate constant of reaction is 0. 010 8 min^- 1.