壳聚糖铜(Ⅱ)配合物催化氧化水中的罗丹明B

Catalytic oxidation of Rhodamine B in water with chitosan-Cu(Ⅱ) complexes

以壳聚糖(CTS)和铜离子通过配位反应制备壳聚糖铜(Cu-CTS),通过傅里叶变换红外光谱(FTIR)对产物进行结构表征。考察了体系pH、反应温度、反应时间、催化剂用量和过氧化氢质量浓度等因素对罗丹明B(RhB)降解的影响。进行了RhB降解动力学研究,监测了反应过程中UV谱的变化,对反应中间体进行结构分析。试验表明,在弱酸性条件下,Cu-CTS催化氧化RhB效果良好,降解遵循一级反应动力学,适合处理RhB染料废水。

Chitosan-Cu （II） （Cu-CTS） complexes was successfully prepared by coordination reaction be- tween chitosan （CTS） and cupric ion. The product was characterized by Fourier transform infrared spectrosco- py （FTIR）. The influences of initial pH, the reaction temperature and time, the catalyst dosage and the concen- tration of hydrogen peroxide on degradation of Rhodamine B were investigated, and the degradation kinetics was also studied. The change of ＇reaction process of UV spectrum was monitored, and the intermediate struc- ture was analyzed. The experimental results showed that at weakly acidic condition the effect of Cu-CTS cata- lytic oxidation of Rhodamine B （RhB） was very good. Its degradation followed the first order reaction kinetics. Cu-CTS was suitable for treatment of RhB dye wastewater.