化学学报 ›› 2019, Vol. 77 ›› Issue (5): 434-441.DOI: 10.6023/A18120511 上一篇    下一篇

研究论文

UiO-66/CoSO4复合材料对环境中盐酸左氧氟沙星的高效去除

朱桂芬, 陈乐田, 程国浩, 赵娟, 杨灿, 张耀宗, 王醒, 樊静   

  1. 河南师范大学环境学院 黄淮水环境与污染防治教育部重点实验室 河南省环境污染控制重点实验室 新乡 453007
  • 收稿日期:2018-12-25 出版日期:2019-05-15 发布日期:2019-03-20
  • 通讯作者: 朱桂芬, 樊静 E-mail:gfzhu617@163.com;fanjing@htu.cn
  • 基金资助:

    国家自然科学基金(Nos.21507023,21876045,21777038),河南省高等学校青年骨干教师培养计划(No.2016GGJS-047)和河南省科技攻关(No.182102310656)资助项目.

Efficient Removal of Levofloxacin Hydrochloride from Environment by UiO-66/CoSO4 Composites

Zhu Guifen, Chen Letian, Cheng Guohao, Zhao Juan, Yang Can, Zhang Yaozong, Wang Xing, Fan Jing   

  1. School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007
  • Received:2018-12-25 Online:2019-05-15 Published:2019-03-20
  • Contact: 10.6023/A18120511 E-mail:gfzhu617@163.com;fanjing@htu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 21507023, 21876045 and 21777038), Key Scientific Research Foundation of the Higher Education Institutions of Henan Province (No. 2016GGJS-047) and Scientific and Technological Department of Henan Province (No. 182102310656).

以UiO-66为前驱体制得UiO-66/CoSO4复合材料,借助扫描电子显微镜、透射电子显微镜、元素分析和比表面积分析等手段对复合材料的微观形貌和结构进行表征,采用吸附平衡实验,系统考察该复合材料的吸附性能.结果表明,在相同条件下UiO-66/CoSO4复合材料比UiO-66对盐酸左氧氟沙星的去除率提高26.5%,且复合材料在30 min对盐酸左氧氟沙星的吸附达到平衡,最大吸附容量为108.4 mg·g-1,其吸附特性符合假二级动力学模型.该UiO-66/CoSO4复合材料制备过程简单,对实际环境水样和土样中盐酸左氧氟沙星的去除率在94.7%以上,且经过5次再生循环使用后,吸附效率无明显下降.

关键词: UiO-66/CoSO4, 盐酸左氧氟沙星, 环境样品, 去除

In this work, a newly UiO-66/CoSO4 composite was prepared by introducing UiO-66 as precursor carrier. The morphology and structure of the presented UiO-66/CoSO4 composite were characterized by scanning electron microscopy, elemental analysis, specific surface area analysis and X-ray diffraction. The adsorption performance of UiO-66/CoSO4 towards levofloxacin hydrochloride (LV) in aqueous solution was investigated, and some parameters, such as pH value, temperature, contact time and initial concentration have been optimized. The results showed that the UiO-66/CoSO4 composite has significant adsorption performance for levofloxacin hydrochloride. Compared with the control material UiO-66, the removal efficiency of the composite towards levofloxacin hydrochloride increased by 20% under the same conditions, which indicated that the properties of the composites have been greatly improved. Within 5 min, 95.3% of levofloxacin hydrochloride can be removed, and the equilibrium adsorption (99.8%) was achieved within 30 min and the adsorption process could be described by pseudo-second-order kinetic model. The adsorption isotherm verified that the maximum adsorption capacity was up to 108.42 mg·g-1 and fitted well with the Langmuir isotherm model, which indicated that monolayer coverage of levofloxacin hydrochloride was formed on the surface of UiO-66/CoSO4 composite. Data obtained from thermodynamic study showed that the adsorption process is spontaneous endothermic reaction and the chemical adsorption might play major role to control step. The UiO-66/CoSO4 composite was easy to prepare with good reusability, and the adsorption efficiency is still higher than 92.2% after five cycles. Additionally, under the optimized condition, the UiO-66/CoSO4 composite was successfully applied for the removal of levofloxacin hydrochloride from environmental water and soil samples. It was found that above 94.7% of target can be removed by the as-prepared UiO-66/CoSO4 composite. This result proved that the composite with excellent recognition has been synthesized. The new UiO-66/CoSO4 composite prepared in this work provided a way to treatment levofloxacin hydrochloride in environment with broad application prospect.

Key words: UiO-66/CoSO4, levofloxacin hydrochloride, environmental samples, removal