Cu(II)/H_(2)O_(2)/HA体系降解染料AO7的效能及机理研究  

Efficiency and Mechanism of the Cu(II)/H_(2)O_(2)/HA System for Degradation of Acid Orange7

作　　者：王白梅 曹建来 Wang Baimei;Cao Jianlai(College of Environmental Science and Engineering,Zhejiang Gongshang University,Hangzhou,China;Hangzhou Water Group Co.,Ltd.,Hangzhou,China)

机构地区：[1]浙江工商大学环境科学与工程学院,浙江杭州 [2]杭州市水务集团有限公司,浙江杭州

出　　处：《科学技术创新》2025年第2期9-14,共6页Scientific and Technological Innovation

摘　　要：针对芬顿体系处理废水pH工作范围窄的问题,提出了一种接近中性的类芬顿体系(Cu(II)/H_(2)O_(2)/HA),以AO7为目标降解污染物,研究了Cu(II)投加量、H_(2)O_(2)投加量、HA投加量、pH值等反应条件对Cu(II)/H_(2)O_(2)/HA降解AO7的影响。结果表明,在近中性条件下(pH=6),Cu(II)/H_(2)O_(2)/HA体系对AO7的降解效果显著,AO7的去除率高达81%,并且,该体系中AO7的分解动力学遵循拟一级反应动力学,反应速率常数为0.128 min-1。pH的增加对AO7的降解起促进作用。通过添加不同的自由基淬灭剂,探究了Cu(II)/H_(2)O_(2)/HA体系对AO7的去除机理和途径。其中,·OH是AO7降解过程中的主要活性物种,HA的作用是将Cu(II)还原为Cu(I),从而促进H_(2)O_(2)分解产生·OH,提高体系的氧化降解效率。A nearly neutral Fenton like system(Cu(II)/H_(2)O_(2)/HA)was proposed to address the issue of narrow pH range in the Fenton system for wastewater treatment.AO7 was targeted for pollutant degradation,and the effects of reaction conditions such as Cu(II)dosage,H_(2)O_(2)dosage,HA dosage,and pH value on the degradation of AO7 by Cu(II)/H_(2)O_(2)/HA were studied.The results showed that under near neutral conditions(pH=6),the Cu(II)/H_(2)O_(2)/HA system had a significant degradation effect on AO7,with a removal rate of up to 81%.Moreover,the decomposition kinetics of AO7 in this system followed a pseudo first order reaction kinetics,with a reaction rate constant of 0.128 min-1.The increase in pH promotes the degradation of AO7.The removal mechanism and pathway of AO7 by Cu(II)/H_(2)O_(2)/HA system were investigated by adding different free radical quenchers.Among them,·OH is the main active species in the degradation process of AO7.The action of HA reduces Cu(II)to Cu(I),thereby promoting the decomposition of H_(2)O_(2)to produce·OH and improving the oxidative degradation efficiency of the system.

关 键 词：铜类芬顿 羟胺 AO7 近中性 印染废水 

分 类 号：X788[环境科学与工程—环境工程]