化工环保2024，Vol.44Issue(6)：835-843,9.DOI:10.3969/j.issn.1006-1878.2024.06.011
纳米塑料对依诺沙星的吸附及密度泛函理论计算
Adsorption of nanoplastics on ENO and density functional theory calculations
摘要
Abstract
The adsorption behavior of polystyrene microspheres(PSNPs)and carboxyl-modified PSNPs(PSNPs-COOH)on antibiotic enoxacin(ENO)in aqueous solution was studied from the perspectives of adsorption kinetics and thermodynamics.The effects of pH,temperature,macromolecular organic matter,and metal ions on the adsorption capacity of ENO were analyzed,and the adsorption mechanism of PSNPs and PSNPs-COOH on ENO was discussed.The experimental results show that the adsorption characteristics of PSNPs and PSNPs-COOH on ENO are consistent with the quasi-second-order kinetics model and Langmuir isothermal adsorption model,which is a spontaneous exothermic process.Under the conditions of temperature of 298 K,pH of 6.0,mass concentration of PSNPs or PSNPs-COOH of 2.5 mg/L,and mass concentration of ENO of 10 mg/L,the adsorption capacities of PSNPs and PSNPs-COOH for ENO were 231 mg/g and 257 mg/g,respectively.The adsorption of ENO by PSNPs and PSNPs-COOH was significantly inhibited by Na+,Cu2+,and Zn2+.Electrostatic interaction is the main mechanism of ENO adsorption by PSNPs.Hydrogen bonding and electrostatic interaction are the main mechanisms of ENO adsorption by PSNPs-COOH.关键词
纳米聚苯乙烯/羧基化/依诺沙星/吸附作用/密度泛函理论Key words
nano polystyrene/carboxylation/enoxacin/adsorption/density functional theory分类
资源环境引用本文复制引用
吴伟琴,吴渊,陈中锴,刘禄政,甘霖,李亚男..纳米塑料对依诺沙星的吸附及密度泛函理论计算[J].化工环保,2024,44(6):835-843,9.基金项目
山西省应用基础研究计划项目(20210302123121) （20210302123121）
山西省省筹资金资助回国留学人员科研资助项目(2023-054) （2023-054）
2024年太原理工大学大学生创新训练计划项目(124). （124）
