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| 紫根水葫芦基活性炭吸附氧氟沙星-铜特性及机理研究 |
| Adsorption characteristics and mechanisms of ofloxacin-Cu by activated carbon based on long-root Eichhornia crassipes |
| 投稿时间：2019-04-08 |
| DOI：10.13254/j.jare.2019.0175 |
| 中文关键词: 紫根水葫芦，活性炭，氧氟沙星，铜，复合污染，吸附 |
| 英文关键词: long-root Eichhornia crassipes, activated carbon, ofloxacin, Cu, combined pollution, adsorption |
| 基金项目:国家重点研发计划项目（2018YFC1901000）；国家自然科学基金项目（41771513，41001316） |
| 作者 | 单位 | E-mail | | 陈鑫 | 华东理工大学资源与环境工程学院, 上海 200237
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 | | | 魏志远 | 华东理工大学资源与环境工程学院, 上海 200237
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 | | | 赵翰斌 | 华东理工大学资源与环境工程学院, 上海 200237
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 | | | 武广哲 | 华东理工大学资源与环境工程学院, 上海 200237
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 | | | 刘莉莉 | 华东理工大学资源与环境工程学院, 上海 200237
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 | lilyliu@ecust.edu.cn |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 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. |
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