摘要
以煤矸石为原料,制备出磁性煤矸石地质聚合物(Fe_(3)O_(4)-CGGP),研究了其类芬顿氧化降解苯酚的性能和机制。表征显示,粒径为10~20 nm的Fe_(3)O_(4)均匀分散在煤矸石地质聚合物(CGGP)表面形成Fe_(3)O_(4)-CGGP,Fe_(3)O_(4)-CGGP的饱和磁化强度达到35.68 emu/g,这表明Fe_(3)O_(4)-CGGP具有良好的催化活性和磁响应性能。将其应用于降解苯酚废水,实验探讨了pH值、催化剂投加量、H_(2)O_(2)投加量以及苯酚初始浓度等条件对苯酚降解过程的影响。实验表明:反应最适宜pH值为3.5,催化剂最佳投加量为0.5 g/L,H_(2)O_(2)最佳投加量为10 mmol/L,在最优条件下60 min对苯酚去除率可达到100%.自由基淬灭实验认为在Fe_(3)O_(4)-CGGP/H_(2)O_(2)类芬顿降解苯酚体系中·OH是主要的活性物质。
Magnetic geopolymer(Fe_(3)O_(4)-CGGP) was prepared from coal gangue, and evaluated by Fenton-like degradation of phenol. It was found that Fe_(3)O_(4)with a particle size of 10-20 nm was uniformly dispersed on the surface of coal gangue geopolymer(CGGP). The saturation magnetization of Fe_(3)O_(4)-CGGP reached 35.68 emu/g. These indicated that Fe_(3)O_(4)-CGGP had a good catalytic activity and magnetic responsiveness. The effects of pH value, catalyst dosage, H_(2)O_(2)dosage, and initial phenol concentration were investigated on Fenton-like degradation of phenol. The optimum conditions were as follows: pH is 3.5, catalyst dosage 0.5 g/L, and H_(2)O_(2)10 mmol/L. Under the parameters, phenol can be completely degraded in 60 min. The free radical quenching experiment revealed that ·OH dominates the catalytic process in the Fe_(3)O_(4)-CGGP/H_(2)O_(2)system.
作者
吴丹蕾
吉登高
郭精茂
曹守发
王欣
马建超
WU Danlei;JI Denggao;GUO Jingmao;CAO Shoufa;WANG Xin;MA Jianchao(Colloge of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《太原理工大学学报》
CAS
北大核心
2023年第1期81-90,共10页
Journal of Taiyuan University of Technology
基金
山西省重点研发计划(社会发展领域)资助项目(201903D321053)
山西省留学回国人员科研资助项目(HGKY2019017)
国家重点研发计划资助项目(2019YFC0408604-4)。
