酸性水钠锰矿降解甲基橙废水的研究

A Study on Degradation of Methyl Orange by Acid Birnessite

本文采用回流法制备酸性水钠锰矿,利用该材料对甲基橙(MO)染料模拟废水进行降解处理。分别采用X射线衍射(XRD)、电感耦合等离子体光谱仪(ICP-AES)和BET氮气吸附法对合成酸性水钠锰矿的晶体结构、化学组成以及比表面积进行了表征。分别考察了pH值、锰氧化物质量浓度、染料质量浓度及温度对MO去除的影响规律。研究结果表明,低pH时酸性水钠锰矿对甲基橙的去除效果显著;矿物浓度升高及染料浓度降低都可以促进甲基橙的降解,但反应温度升高不利于甲基橙的降解。

Acidic birnessite was prpared , and applied in degradation of methyl orange （ MO ） .The struc-ture,composition and surface area were studied in detail by using XRD （ X-ray diffraction） ,ICP-AES （ in-ductively coupled plasma-atomic emission spectroscopy ） , and N2 physisorption at 77 K.The effects of pH , concentration of Bir-H, concentration of MO and reaction temperature on degradation rate of MO were ex-plored.The results revealed that low pH ,high concentration of Bir-H and low concentration of MO increased the degradation rate of MO ,but the higher reaction temperature decreased the degradation rate of MO .