酸性水钠锰矿降解甲基橙废水的研究

摘要

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 .%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。