电化学在线制备高铁氧化脱色偶氮染料酸性红B的研究

模拟染料废水自身的碱度为电化学在线制备高铁提供了碱性环境，研究高铁氧化酸性红B．结果表明，在氢氧化钠投加量为10g，电流强度为1A，连续搅拌的条件下，酸性红B在3h后的脱色率可达到90％以上，增大酸性红B的初始浓度，脱色去除率可达到同样的效果，但高铁在单位时间内处理的量相对增大，高铁在线脱色酸性红B的化学氧化反应符合一级反应动力学，同时，根据UV—Vis谱图和模拟电极反应进程对电化学生成高铁氧化酸性红B的降解机理作了初步的探讨．

ON-LINE OXIDATIVE DECOLORATION ACID RED B BY ON-LINE ELECTRO-SYNTHESIZED FERRATE

Ferrate as a strong oxidant can be synthesized by electrochemistry method in high pH solution which can be provided by the alkalinity of dye wastewater. So the technique of on-line synthesized ferrate and on-line oxidation of ferrate for decolorizing acid red B were studied. The optimum of ferrate electrolysis for decolorizing acid red B was studied and the results show that the efficiency of decoloration can be achieved above 90% when the NaOH dose is 10g, current i=1A under constant stirring. The reaction of decoloration by electrosythesis ferrate follows a first-order dynamics. The mechanism of decolorization was studied by scanning the (absorbance) decreasing of acid red B in the UV-Vis spectrum and stimulating the electrolysis process for acid red B decoloration.