摘要
通过高温热解的方法制备了由Ce-金属有机骨架衍生的CeO_(2)(CeO_(2)-M)催化剂。对CeO_(2)-M的结构、形貌进行表征,并以双酚A(BPA)为模拟污染物,研究了CeO_(2)-M活化过一硫酸盐(PMS)降解BPA的性能,考察了催化剂用量、PMS用量、初始溶液pH、共存阴离子及腐殖酸(HA)等因素对BPA降解性能的影响。结果表明:CeO_(2)-M具有更为均一和充分暴露的活性位点,表现出优异的催化性能;CeO_(2)-M能在较宽的pH范围(3.0~9.0)内高效活化PMS降解BPA;在PMS加入量为1.5 mmol/L、CeO_(2)-M加入量为0.25 g/L的条件下,BPA去除率可达98.1%;NO_(3)^(‒)、CO_(3)^(2‒)、SO_(4)^(2‒)、HCO_(3)^(‒)和HA对BPA的降解有抑制作用,而Cl‒的存在却能起到一定的促进作用;CeO_(2)-M具有优异的重复使用性能,经6次循环使用后,BPA去除率仅下降14.2个百分点;CeO_(2)-M活化PMS降解BPA的过程中产生了SO_(4)·^(‒)、·OH、O_(2)·^(‒)和^(1)O_(2),其中·OH和SO_(4)·^(‒)为主要活性物种。
In this study,CeO_(2)-M derived from Ce-metal-organic frameworks was prepared by high-temperature pyrolysis.Its structure and morphology were characterized,and its performance of activating peroxymonosulfate(PMS)for degrading bisphenol A(BPA)was investigated.The effects of factors including the amount of the catalyst and PMS,the initial solution pH,co-existing anions,and humic acid(HA)on BPA degradation were studied.The results show that benefiting from its uniform and fully exposed active sites,CeO_(2)-M exhibits excellent catalytic activity.CeO_(2)-M can effectively activate PMS to degrade BPA in a wide pH range(3.0-9.0).Under the PMS addition of 1.5 mmol/L and the CeO_(2)-M addition of 0.25 g/L,the degradation rate of BPA can reach 98.1%.NO_(3)^(‒),CO_(3)^(2‒),SO_(4)^(2‒),HCO_(3)^(‒)and HA can inhibit the degradation of BPA,while Cl‒can promote it to a certain extent.In addition,CeO_(2)-M also exhibits excellent reusability,and the degradation rate of BPA only decreases by 14.2 percentage points after 6 cycles of use.SO_(4)·^(‒),·OH,O_(2)·^(‒)and ^(1)O_(2) are involved in the degradation process,with·OH and SO_(4)·^(‒)as the main active species.
作者
谭微
陈燕霞
胡桂娟
仝海娟
左卫元
TAN Wei;CHEN Yanxia;HU Guijuan;TONG Haijuan;ZUO Weiyuan(Department of Food and Chemical Engineering,Liuzhou Institute of Technology,Liuzhou 545616,China;Guangxi Key Laboratory of Urban Water Environment,College of Chemistry&Environment Engineering,Baise University,Baise 533000,China)
出处
《化工环保》
CAS
CSCD
北大核心
2024年第5期660-666,共7页
Environmental Protection of Chemical Industry
基金
广西自然科学基金项目(2022GXNSFBA035468)
国家级大学生创新创业训练计划项目(202313639011)
百色市科学研究与技术开发计划课题项目(20232048)
柳州工学院科学基金项目(2021KYJJ14)
柳州工学院高层次人才科研启动项目(LGGKYF202201)。
