生态环境学报2026，Vol.35Issue(2)：267-277,11.DOI:10.16258/j.cnki.1674-5906.2026.02.010
改性煤气化渣对水中磺胺嘧啶吸附性能及机理研究
Study on the Adsorption Performance and Mechanism of Modified Coal Gasification Slag for Sulfadiazine in Aquatic Environment
摘要
Abstract
This study aimed to prepare a high-performance adsorbent(highly active coal gasification slag,HCGS)to adsorb sulfadiazine(SDZ)from industrial wastewater.HCGS was synthesized through the hydrothermal modification of solid waste coal gasification slag(CGS).This study analyzed and explored the physicochemical properties,adsorption performance and mechanisms.The modification of CGS under different acid concentrations and temperature conditions was conducted,with Pearson correlation analysis performed on the leaching of oxides,Si-OH content,and adsorption performance under various modification conditions.The adsorption conditions were explored,and the materials were characterized using XRD,FT-IR,SEM,BET,and XPS.The results demonstrated that the optimal modification temperature was 80℃and the mass fraction of hydrochloric acid was 16%.The specific surface area of HCGS reached 326 m2·g-1,and its adsorption capacity for SDZ reached 24.8 mg·g-1.The modification mechanism was primarily attributed to the formation of silanol groups and the protonation of hydroxyl groups.The optimal adsorption conditions included 180 min contact time,initial SDZ concentration of 20 mg·L⁻1,pH of 8,and adsorbent dosage of 30 mg.The adsorption kinetics followed a quasi-second-order kinetic model,indicating a heterogeneous diffusion process dominated by chemical adsorption.The intra-particle diffusion model suggested that the adsorption process was influenced by additional factors beyond intra-particle diffusion.The adsorption mechanism was related to hydrogen bonding and electrostatic interactions.This study converted CGS into high-performance and low-cost adsorbent materials,achieving the dual goals of solid waste resource utilization and antibiotic pollution control,and providing a theoretical basis and technical support for the treatment of antibiotic industrial wastewater.关键词
磺胺嘧啶/煤气化渣/改性/吸附/水环境Key words
sulfadazine/coal gasification slag/modification/adsorption/aquatic environment分类
资源环境引用本文复制引用
范铭洋,郭春彬,邹晶晶,罗根华,刘越雌,徐颖..改性煤气化渣对水中磺胺嘧啶吸附性能及机理研究[J].生态环境学报,2026,35(2):267-277,11.基金项目
鄂尔多斯科技突围"揭榜挂帅"重大项目(JBGS2024010) （JBGS2024010）
辽宁工程技术大学鄂尔多斯研究院校地科技合作培育项目(YJY-XD-2024-B-001 （）
YJY-XD-2024-A-021 （）
YJY-XD-2024-A-022) （）
辽宁省教育厅项目(LJ212410147075) （LJ212410147075）
辽宁省自然科学基金联合基金项目(20240305 （）
20240306) （）
