纳米铁/铝/碳微电解联合过硫酸盐处理金属加工清洗废水的研究  

Nano-iron/aluminum/carbon micro-electrolysis combining with persulfate to treat wastewater from metal processing and cleaning

作　　者：刘欢欢[1] 李春虎[1] 王亮[1] 王文泰[1] LIU Huan-huan;LI Chun-hu;WANG Liang;WANG Wen-tai(Key Laboratory of Marine Chemistry Theory and Technology of the Ministry of Education of PRC,College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学化学化工学院,教育部海洋化学理论与工程技术重点实验室,山东青岛266100

出　　处：《现代化工》2022年第5期144-149,156,共7页Modern Chemical Industry

基　　金：青岛市民生科技计划项目(17-3-3-71-nsh)。

摘　　要：为扩大微电解技术处理实际废水时pH使用范围,根据金属零部件加工清洗废水的水质特点,将纳米铁/铝/碳微电解(nFe/nAl/AC)和过硫酸盐(PS)联用构成nFe/nAl/AC-PS体系处理废水。通过液相共还原法制备了nFe/nAl/AC,并对样品进行XRD、SEM与XPS表征。考察过硫酸钠浓度、nFe/nAl/AC质量浓度、反应初始pH对COD去除率的影响;当采用nFe/nAl/AC-PS体系降解清洗废水时,原水pH为6.8时,COD去除率可达75.7%;捕获剂实验表明降解污染物起主要作用的是·OH。通过磁回收实现再利用,3次循环使用后仍有较高COD去除率。In order to expand the applicable range of pH in the treatment of actual wastewater by micro-electrolysis technology,nano-iron/aluminum/carbon micro-electrolysis(nFe/nAl/AC)and persulfate(PS)technology are combined to form a nFe/nAl/AC-PS system for the treatment of wastewater from metal parts processing and cleaning.The nFe/nAl/AC is prepared via liquid phase co-reduction method,and the samples are characterized by means of XRD,SEM and XPS.The effects of sodium persulfate dosage,nFe/nAl/AC dosage and initial pH on the removal rate of COD are investigated.It is shown that the removal rate of COD can reach 75.7%when nFe/nAl/AC-PS system is utilized to decompose the wastewater that has an initial pH value of 6.8.The capture agent experiment indicates that·OH plays a major role in the degradation of pollutants.The nFe/nAl/AC-PS system can be reused after magnetic recovery,and can contribute to a high COD removal rate after three cycles of reuse.

关 键 词：金属加工清洗废水 微电解 过硫酸盐活化 硫酸根自由基 

分 类 号：X52[环境科学与工程—环境工程]