硅钙源固废负载钴基催化剂活化过一硫酸盐降解双酚A的性能及机理  

Performance and mechanism of degradation of bisphenol A by cobalt-based catalysts loaded on silicate-calcium solid waste activating peroxymonosulfate

作　　者：白文胜 王迎庆 苏义平 沈雪华 张作泰 颜枫 BAI Wensheng;WANG Yingqing;SU Yiping;SHEN Xuehua;ZHANG Zuotai;YAN Feng(Guizhou Provincial Archtectural Design and Research Institute Co.Ltd.,Guiyang 550081,China;School of Environmental Science and Engineering,Southern University of Science and Technology,ShenZhen 518055,China)

机构地区：[1]贵州省建筑设计研究院有限责任公司,贵阳550081 [2]南方科技大学环境科学与工程学院,深圳518055

出　　处：《环境工程学报》2024年第10期2918-2929,共12页Chinese Journal of Environmental Engineering

基　　金：国家杰出青年科学基金资助项目(52225407);广东省基础与应用基础研究重大项目(2023B0303000024);深圳市技术攻关重点资助项目(KCXFZ20211020174805008,KCXFZ20230731093902006,KCXFZ20211020165004006)。

摘　　要：大宗硅钙基固废的高效清洁利用一直是研究的热点,由于其共存物相种类杂、微观结构差异大等复杂难题,导致目前主要以建材化和筑基修路等低值资源化利用为主,缺乏市场竞争力而消纳有限,实现硅钙基固废的绿色高值化利用至关重要。本研究以钢渣和粉煤灰等典型硅钙基固废为原料制备了钢渣源Co@SS-CSH-700和粉煤灰源Co@FACSH-7002种催化剂,用于降解污水中的双酚A。结果表明,Co@FA-CSH-700的结构更蓬松,可为过一硫酸盐(peroxymonosulfate,PMS)提供更多活性位点,促进了双酚A(bisphenol A,BPA)降解。在PMS/Co@SS-CSH-700体系下,30 min内BPA的降解率均超过99.9%,而在PMS/Co@FA-CSH-700体系中,BPA在5 min内即可完全降解,展现出极高的催化效率。此外,SO_(4)·^(-)自由基是BPA降解的关键活性物种,而·OH和^(1)O_(2)的作用较小。基于上述研究,提出了固废源负载型钴基催化剂活化PMS降解BPA的机理,以上研究结果可为工业固废资源化制备高效催化剂并处理有机污染物废水提供新的技术路径。The efficient and clean utilization of bulk silicate-calcium solid wastes is always a hot topic.Due to the complex problems such as their diverse phase types and large microstructure differences,silicate-calcium solid wastes are mainly taken for the low-value resource utilization such as building materials and road construction materials,which lacks market competitiveness and handling capacity,so it is very important to realize green high-value utilization of silicate-calcium solid wastes.In this study,two catalysts,such as Co@SSCSH-700 derived from steel slag and Co@FA-CSH-700 derived from fly ash,were prepared to degrade bisphenol A(BPA)in wastewater.The results showed that Co@FA-CSH-700 exhibited a fluffier structure than Co@SS-CSH-700,and provided more active sites for peroxymonosulfate(PMS),which promoted the degradation of BPA.The study demonstrated that the degradation efficiency of BPA in PMS/Co@SS-CSH-700 system exceeded 99.9%within 30 minutes,while in PMS/Co@FA-CSH-700 system,BPA could be completely degraded within 5 minutes,showing a very high catalytic efficiency.Furthermore,the study also found that SO_(4)·^(-)free radicals were key active species for BPA degradation,whereas·OH and^(1)O_(2)had slight effects.Based on the above studies,the mechanism of BPA degradation by cobalt-based catalysts loaded on silicate-calcium solid waste activating PMS was proposed.This study provides a new technical path for the preparation of high efficient catalysts from industrial solid wastes to treat organic pollutant wastewater.

关 键 词：钢渣 粉煤灰 水合硅酸钙 含钴废水 过一硫酸盐 双酚A 

分 类 号：X703[环境科学与工程—环境工程]