载铜地质聚合物微球的制备及其催化降解双酚S的性能
Preparation of copper-loaded geopolymer microspheres and their catalytic degradation of bisphenol S
张政 1刘琳 1李子晨 1王梦琦 1黄春燕 1葛圆圆1
作者信息
- 1. 广西大学化学化工学院,广西石化资源加工及过程强化技术重点实验室,广西 南宁 530004
- 折叠
摘要
传统的芬顿反应因在废水处理过程中会产生大量富含金属污泥而应用受限.本研究采用悬浮固化法得到了一种低成本、易回收、绿色的多孔地质聚合物微球(GM),将其作为载体通过浸渍法制备了载铜地质聚合物微球(Cu-GM),作为类芬顿反应催化剂,催化H2O2降解水中的双酚S(BPS).SEM、XRD、BET和XPS等一系列表征结果表明,Cu+/2+被稳定固定在GM表面.进一步探究了Cu-GM用量、H2O2用量、BPS浓度和溶液初始pH对催化降解的影响.结果表明,在优化条件下,Cu-GM在480min内对BPS的去除率可达99.3%,催化降解过程符合一级反应动力学.通过自由基淬灭实验发现,在催化降解过程中·OH和1O2是主要活性物质.循环实验表明Cu-GM具有良好的重复利用性,在去除水中有机污染物方面有着极大的应用潜力.
Abstract
The traditional Fenton reaction has limited its application due to the generation of large amounts of metal-rich sludge during wastewater treatment.In this study,a low-cost,easy-to-recycle and green porous geopolymer microsphere(GM)was obtained by suspension curing method,and the copper-loaded geopolymer microsphere(Cu-GM)was prepared as a carrier by impregnation method as a catalyst for Fenton-like reaction,which catalyzed the degradation of bisphenol S(BPS)in water with H2O2.A series of characterization results,such as SEM,XRD,BET and XPS,showed that that Cu+/2+was stably immobilized on the GM surface.The effects of Cu-GM dosage,H2O2 dosage,BPS concentration and initial pH of the solution on the catalytic degradation were further investigated.The results indicated that under the optimized conditions,the removal of BPS by Cu-GM could reach 99.3%within 480min,and the catalytic degradation process conformed to the first-order reaction kinetics.The free radical burst experiment revealed that·OH and 1O2 were the main active substances in the catalytic degradation process.The bad-cycle experiments showed that Cu-GM had good reusability and great potential for application in removing organic pollutants in water.
关键词
地质聚合物微球/铜基类芬顿/双酚S/催化降解/降解机理Key words
geopolymer microspheres/copper-based Fenton-like/bisphenol S/catalytic degradation/degradation mechanism引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据