摘要
为解决活化过硫酸盐催化剂回收困难和自由基氧化导致重金属大量溶出等问题,文章设计并制备了固定化Cu_(2)O过渡金属材料,通过活化过硫酸盐(PMS)的非自由基路径,降解水中的4-氯酚(4-CP)。在120 min反应时间里,PMS投加量为2.0 mmol/L时,Cu_(2)O/PMS体系对10 mg/L 4-CP的降解效率为95.0%,矿化效率为53.1%。PMS投加量影响有机污染物降解速率,PMS在2.0~6.0 mmol/L时,增加PMS可以提高反应速率。机制研究表明,非自由基反应路径主要通过Cu_(2)O表面的Cu(I)与PMS形成表面复合物降解有机污染物,实现对水中4-CP的有效去除,并且有效抑制了铜离子的大量溶出,为过硫酸盐活化降解水中污染物提供了新思路。
To solve the problem that the power catalyst is difficulty to recover and heavy metal ions dissolution caused by radical oxidation during the water treatment,this study reports the immobilized Cu_(2)O activated persulfate to degrade 4-chlorophenol(4-CP)by non-radical pathway.The Cu_(2)O/PMS system achieved the degradation rate and TOC removal of 4-CP(10 mg/L)as high as 95.0%and 53.1%in the presence of 2.0 mmol/L PMS within 120 min.The dosage of PMS was a parameter affecting the reaction rate.Correspondingly,increasing PMS in the range of 2.0—6.0 mmol/L could improve overall rate of pollutant degradation reaction.The mechanism experiments indicated that the non-radical pathway was the main reaction mechanism associated with direct activation of PMS by Cu_(2)O,resulting in 4-CP removal via activation of PMS by surface complex on Cu_(2)O.The above reaction process not only realized the effective removal of 4-CP in water,but also inhibited the copper ions dissolution.This study provides a new idea for activated persulfate degradation of pollutants in water.
作者
刘雪峰
郑春禹
滕洁
许霞
LIU Xuefeng;ZHENG Chunyu;TENG Jie;XU Xia(School of Urban Construction,Changzhou University,Changzhou 213164,China;Heilongjiang Quanjie Environmental Protection Technology Co.,Ltd.,Harbin 150080,China)
出处
《常州大学学报（自然科学版）》
CAS
2023年第4期52-60,共9页
Journal of Changzhou University：Natural Science Edition
基金
江苏省教育厅高校自然科学基金资助项目(22KJB610007)
常州大学自然科学基金资助项目(ZMF22020037)。
关键词
固定化
铜基材料
过硫酸盐活化
4-氯酚
非自由基路径
immobiliztion
copper-based material
persulfate activation
4-chlorophenol
non-radical reaction pathway
