文献类型：期刊文献

中文题名：紫根水葫芦基活性炭吸附氧氟沙星-铜特性及机理研究

英文题名：Adsorption characteristics and mechanisms of ofloxacin-Cu by activated carbon based on long-root Eichhornia crassipes

作者：陈鑫[1,2];魏志远[1,2];赵翰斌[1,2];武广哲[1,2];刘莉莉[1,2]

机构：[1]华东理工大学资源与环境工程学院,上海200237;[2]国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

年份：2020

卷号：37

期号：1

起止页码：59

中文期刊名：农业资源与环境学报

外文期刊名：Journal of Agricultural Resources and Environment

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：国家重点研发计划项目(2018YFC1901000);国家自然科学基金项目(41771513,41001316)~~

语种：中文

中文关键词：紫根水葫芦;活性炭;氧氟沙星;铜;复合污染;吸附

外文关键词：long-root Eichhornia crassipes;activated carbon;ofloxacin;Cu;combined pollution;adsorption

摘要：为解决目前抗生素与重金属复合污染问题,采用紫根水葫芦基活性炭(Long-root Eichhornia crassipes-activated carbon,LREC-AC)吸附水溶液中的氧氟沙星(Ofloxacin,OFL)和Cu2+,并对其吸附特性和机理等进行研究。结果表明,LREC-AC对OFL和Cu2+的吸附均符合Langmuir模型及拟二级动力学方程。LREC-AC对OFL的吸附机理包括电子供体-受体相互作用、氢键作用和静电引力作用,而对Cu2+的吸附机理则包括静电引力作用,以及电子交换或共价键等作用。在此基础上,考察OFL-Cu2+复合体系中LREC-AC对OFL和Cu2+吸附特性和机理。在复合体系中,LREC-AC对OFL和Cu2+的饱和吸附量分别为59.34 mg·g-1和37.46 mg·g-1。在OFL浓度为10 mg·L-1、Cu2+浓度<2 mg·L-1时,Cu2+可与OFL络合,从而促进LREC-AC对OFL的吸附。研究表明,LREC-AC可通过多种吸附机理共同作用有效去除水体中OFL和Cu2+,同时其对重金属和抗生素复合污染也具有良好的吸附性能。
In order to solve the problem of combined antibiotics and heavy metal pollution,long-root Eichhornia crassipes-activated carbon(LREC-AC) was used to adsorb ofloxacin(OFL) and Cu2+ in aqueous system.Multiple experiments were conducted to investigate the adsorption characteristics and mechanisms of LREC-AC for OFL and Cu2+.Both the adsorption of OFL and Cu2+ by LREC-AC conformed to the Langmuir and pseudo-second-order model.Multiple mechanisms co-existed in the absorption of OFL and Cu2+ by LREC-AC.The adsorption mechanism of OFL by LREC-AC included electron-donor-acceptor interaction,hydrogen bonds,and electrostatic attraction,while the adsorption mechanism of Cu2+ included electrostatic attraction and electronic exchange or covalent bonds.On this basis,the adsorption characteristics and mechanisms of OFL and Cu2+ by LREC-AC in a compound system were further investigated.The saturated adsorption capacities in the compound system were 59.34 mg·g-1 and 37.46 mg·g-1 for OFL and Cu2+,respectively.In addition,OFL concentration of 10 mg·L-1,Cu2+(<2 mg·L-1) promoted the adsorption of OFL by LREC-AC because of the complexation of Cu2+ and OFL.LRECAC can effectively remove OFL and Cu2+ from aqueous system through a variety of adsorption mechanisms.At the same time,LREC-AC has good adsorption performance for combined heavy metal and antibiotics pollution.