农业环境科学学报2024，Vol.43Issue(6)：1389-1399,11.DOI:10.11654/jaes.2023-1106
牡丹果荚基多孔碳材料对水中四环素的吸附
Adsorption of tetracycline in water by peony pod-based porous carbon material
摘要
Abstract
To solve the problem of environmental pollution and resource waste caused by the incineration of peony pod waste,the possible transformation of this biomass to usable porous carbon was assessed.In this study,waste peony pods were the carbon source and KHCO3 the activator in a one-step activation process at 800℃,with an initial pod-to-activator mass ratio of 1∶3.The resulting pore-based carbon material had a well-developed pore structure,suitable for absorbing tetracycline in water.By adjusting the activation temperature and the mass ratio of peony pod to KHCO3,the optimal product PC-800-3 had a specific surface area 60 times higher than that of peony pod porous(PC)obtained by direct pyrolysis,and the maximum adsorption capacity for 100 mg·L-1 TC solution at 298 K was 394.3 mg∙g-1.The PC and PC-800-3 were characterized by specific surface area and pore size analysis,scanning electron microscopy,Fourier transform infrared spectroscopy,and X-ray diffraction.The results showed that the addition of activator promoted the formation of micropores and mesopores in the carbon material.PC-800-3 was selected for subsequent adsorption experiments.The fitting results of adsorption isotherm and adsorption kinetics showed that the adsorption process conformed to the Langmuir isotherm model and pseudo-second-order kinetics model.Thermodynamic experiments confirmed that the adsorption was a spontaneous endothermic process,mainly involving physical adsorption in the monolayer,with electrostatic interaction.The prepared PC-800-3 material exhibited good adsorption performance over a wide pH range and under ion interference.Regeneration experiments showed that PC-800-3 had good reusability.Therefore,converting peony pods into porous carbon to prepare high-performance adsorbents appears to not only solve the problem of antibiotic pollution in water,but also broaden the possible applications of this waste biomass.关键词
牡丹果荚/多孔碳/四环素/吸附Key words
peony pod/porous carbon/tetracycline/adsorption分类
资源环境引用本文复制引用
何红珠,王欣怡,卫潇,王凤杰,刘欣妮,杨钰钰,罗莎,Ilhem Kerboua..牡丹果荚基多孔碳材料对水中四环素的吸附[J].农业环境科学学报,2024,43(6):1389-1399,11.基金项目
国家自然科学基金青年科学基金项目(42207101) （42207101）
国家自然科学基金国际(地区)合作与交流项目(42220104005) （地区）
长安大学中央高校基本科研业务费专项资金项目(300102293208) （300102293208）
陕西省教育厅服务地方专项(22JE08) The Young Scientists Fund of the National Natural Science Foundation of China(42207101) （22JE08）
The Funds for International Cooperation and Exchange of the National Natural Science Foundation of China(42220104005) （42220104005）
The Fundamental Research Funds for the Central Universities(300102293208) （300102293208）
Shaanxi Provincial Education Department Service Local Special Project(22JE08) （22JE08）
