单 位：
华东理工大学资源与环境工程学院;国家环境保护化工过程环境风险评价与控制重点实验室
关键词：
紫根水葫芦;活性炭;氧氟沙星;铜;复合污染;吸附
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Cu~(2+),并对其吸附特性和机理等进行研究。结果表明,LREC-AC对OFL和Cu~(2+)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Cu~(2+)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-Cu~(2+)复合体系中LREC-AC对OFL和Cu~(2+)吸附特性和机理。在复合体系中,LREC-AC对OFL和Cu~(2+)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)、Cu~(2+)浓度<2 mg·L~(-1)时,Cu~(2+)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Cu~(2+),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。
译 名：
Adsorption characteristics and mechanisms of ofloxacin-Cu by activated carbon based on long-root Eichhornia crassipes
作 者：
CHEN Xin;WEI Zhi-yuan;ZHAO Han-bin;WU Guang-zhe;LIU Li-li;School of Resource and Environmental Engineering, East China University of Science and Technology;State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process;
关键词：
long-root Eichhornia crassipes;;activated carbon;;ofloxacin;;Cu;;combined pollution;;adsorption
摘 要：
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 Cu~(2+) in aqueous system.Multiple experiments were conducted to investigate the adsorption characteristics and mechanisms of LREC-AC for OFL and Cu~(2+).Both the adsorption of OFL and Cu~(2+) by LREC-AC conformed to the Langmuir and pseudo-second-order model.Multiple mechanisms co-existed in the absorption of OFL and Cu~(2+) 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 Cu~(2+) included electrostatic attraction and electronic exchange or covalent bonds.On this basis,the adsorption characteristics and mechanisms of OFL and Cu~(2+) 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 Cu~(2+),respectively.In addition,OFL concentration of 10 mg·L~(-1),Cu~(2+)(<2 mg·L~(-1)) promoted the adsorption of OFL by LREC-AC because of the complexation of Cu~(2+) and OFL.LRECAC can effectively remove OFL and Cu~(2+) 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.
