[1]宋双,闫博引,王松雪,等.GAC负载钴氧化物活化过一硫酸盐高效降解甲基橙[J].中国给水排水,2022,38(8):73-81.
　SONGShuang,YANBo-yin,WANGSong-xue,et al.Efficient Degradation of Methyl Orange via Peroxymonosulfate Activated by Cobalt Oxide Loaded on GAC[J].China Water & Wastewater,2022,38(8):73-81.
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GAC负载钴氧化物活化过一硫酸盐高效降解甲基橙

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期数: 2022年第8期 页码: 73-81 栏目: 出版日期: 2022-04-17
Title:
Efficient Degradation of Methyl Orange via Peroxymonosulfate Activated by Cobalt Oxide Loaded on GAC
作者:
宋双1， 闫博引1， 王松雪1， 李金成1， 崔福义2
（1.青岛理工大学 环境与市政工程学院，山东 青岛 266520；2.重庆大学 环境与生态学院，重庆 400045）
Author(s):
SONG　Shuang1， YAN　Bo-yin1， WANG　Song-xue1， LI　Jin-cheng1， CUI　Fu-yi2
（1. School of Environmental and Municipal Engineering， Qingdao University of Technology， Qingdao 266520， China； 2. College of Environment and Ecology， Chongqing University， Chongqing 400045， China）
关键词:
颗粒活性炭;  钴氧化物;  过一硫酸盐;  甲基橙
Keywords:
granular activated carbon;  cobalt oxide;  peroxymonosulfate;  methyl orange
摘要:
针对废水处理中金属氧化物粉末催化剂难以有效分离回收及稳定性较差的问题，采用颗粒活性炭（GAC）为载体，通过浸渍-煅烧的方法将钴氧化物负载到颗粒活性炭（Co@GAC），实现过一硫酸盐（PMS）的高效活化。通过扫描电镜（SEM）等手段表征了不同煅烧温度下制备的Co@GAC的形貌和结构，并以甲基橙为目标污染物，考察了不同煅烧温度对Co@GAC催化性能的影响。还考察了初始pH、甲基橙浓度、PMS含量、Co@GAC投加量等因素对甲基橙降解效果的影响。结果表明，在煅烧温度为500 ℃条件下得到的Co@GAC，在初始pH为7.0、甲基橙浓度为20 mg/L、PMS浓度为0.1 mmol/L、Co@GAC投加量为1 g/L时，反应25 min后对甲基橙的降解率达到97.1%。自由基淬灭实验结果表明，Co@GAC/PMS体系中产生的硫酸根自由基（SO·-）在降解甲基橙的过程中起主要作用，而羟基自由基（·OH）的贡献相对较小。另外，重复实验结果表明，Co@GAC的催化性能稳定性较好，能够实现多次重复使用，在水处理领域具有较大的应用潜力。
Abstract:
In order to solve the separation and recovery difficulty of metal oxide powder catalyst and its poor stability in wastewater treatment, cobalt oxide was loaded onto granular activated carbon (GAC) as Co@GAC by impregnation?calcining method to activate peroxymonosulfate (PMS) efficiently. The morphology and structure of Co@GAC prepared at different calcination temperatures were characterized by scanning electron microscopy (SEM) and etc., and the effect of different calcination temperatures on the catalytic performance of Co@GAC was investigated with methyl orange as the target pollutant. The effects of initial pH, methyl orange concentration, PMS and Co@GAC dosage on the degradation of methyl orange were also investigated. The results show that when the initial pH, the concentrations of methyl orange and PMS, dosage of Co@GAC calcined at 500 ℃ were 7.0, 20 mg/L, 0.1 mmol/L, and 1 g/L, respectively, the degradation rate of methyl orange reached 97.1% after 25 minutes. The results of free radical quenching experiments showed that sulfate radicals (SO4·-) produced in the Co@GAC/PMS system played a major role in the degradation of methyl orange, while the contribution of hydroxyl radicals (·OH) was relatively small. In addition, the results of repeated experiments showed that Co@GAC has favorable catalytic stability and could be applied repeatedly, which has great application potential in the field of water treatment.

相似文献/References:

[1]张净钰,杨媛,胡以松,等.GAC/DMBR复合工艺的优化及污水处理效能[J].中国给水排水,2020,36(11):9.
　ZHANG Jing-yu,YANG Yuan,HU Yi-song,et al.Optimization of Granular Activated Carbon and Dynamic Membrane Bioreactor Hybrid Process and Its Wastewater Treatment Efficiency[J].China Water & Wastewater,2020,36(8):9.

更新日期/Last Update: 2022-04-17