负载过渡金属颗粒电极催化降解焦化废水尾水
China Environmental Science（2022）
Abstract
制备以活性炭为载体,负载Ni、Fe、Co单元素和Ni-Fe、Co-Fe双元素的5种颗粒电极,用以降解模拟焦化废水尾水.结果显示,负载双元素的颗粒电极对模拟废水的处理效果要好于单元素,其中Ni-Fe/PAC降解性能最好,COD与TOC降解率可达70.1％和40.1％.Ni-Fe/PAC也具有最高的析氧电位和最低的Tafel斜率,分别为2.25V和86mV/dec;所负载的晶体结构为单质Ni和Fe,含有少量的铁氧化物.颗粒电极的添加,会导致出水呈碱性,Co的掺入导致碱性增大,而Fe的掺入有利于降低出水pH值.模拟废水中3类有机物在Ni-Fe/PAC上降解效果呈现为多环芳烃
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