钴铜铁三元类水滑石材料催化过硫酸氢钾复合盐降解苯酚  

Degradation of phenol by peroxymonosulfate activated with cobalt-copper-iron ternary hydrotalcite-like compounds

作　　者：杜仙格 杜娜娜 曹昉[1] 李晋[1] 张建栋 高丽丽[1] DU Xiange;DU Nana;CAO Fang;LI Jin;ZHANG Jiandong;GAO Lili(College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024;College of Biomedical Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024)

机构地区：[1]太原理工大学环境科学与工程学院,山西太原030024 [2]太原理工大学生物医学工程学院,山西太原030024

出　　处：《环境污染与防治》2020年第7期843-848,共6页Environmental Pollution & Control

基　　金：山西省重点研发计划(社会发展领域)项目(No.201703D321009-4、No.201803D31050);山西省研究生联合培养基地人才培养项目(No.2018JD17)。

摘　　要：采用共沉淀法制备过渡金属钴、铜、铁组成的钴铜铁三元类水滑石材料(CoCuFe-LDH),用于催化过硫酸氢钾复合盐(PMS)降解水中苯酚,并考察了初始pH、CoCuFe-LDH催化剂投加量、PMS用量对苯酚降解效率的影响。实验结果表明:CoCuFeLDH对PMS的催化活性较高;在pH为中性,催化剂为0.20g/L,PMS为2.5mmol/L,苯酚为50mg/L的条件下处理60min,苯酚的去除率可达96%;当催化剂投加量分别为0.05、0.10、0.15g/L,反应40min时,苯酚的去除率分别为76%、82%和91%。自由基猝灭实验表明,CoCuFe-LDH/PMS催化体系中存在硫酸根自由基和羟基自由基,但硫酸根自由基为主要活性自由基。Cobalt-copper-iron ternary hydrotalcite-like compounds(CoCuFe-LDH)composed of transition metal cobalt,copper and iron were prepared by co-precipitation methodology to catalyze the degradation process of phenol in water with peroxymonosulfate(PMS).The effects of initial pH,catalyst dosage and PMS dosage on phenol degradation efficiency were investigated.The results showed that the catalytic activity of CoCuFe-LDH on PMS was good.When 50 mg/L of phenol solution was treated under the following conditions:neutral pH,catalyst dosage 0.20 g/L and PMS dosage 2.5 mmol/L for 60 min,the degradation rate of phenol could reach 96%.When the CoCuFeLDH dosage was 0.05,0.10,0.15 g/L,the degradation rate of phenol at 40 min was found to be 76%,82%and 91%,respectively.Free radical quenching experiments showed that sulfate radicals and hydroxyl radicals existed in the CoCuFe-LDH/PMS catalytic system,but sulfate radicals were the main active radicals.

关 键 词：钴铜铁三元类水滑石 过硫酸氢钾复合盐 苯酚 

分 类 号：X703[环境科学与工程—环境工程]