期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 422, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126829
关键词
Hydrogen-bonded polymers; Covalent organic polymers; Response surface methodology; Levofloxacin adsorption; Orthogonal reaction; Permeable reactive barrier
资金
- National Natural Science Foundation of China [21601177]
- Major Science and Technology Project of Water Body Pollution Control and Treatment [2018ZX07111001]
- Scientific Research Planning Project of Jilin Prov-ince Department of Education [JJKH20200942KJ]
- Tech-nology Plan Project of Jilin Province Department [20200403007SF]
- 111 Project [B16020]
The study demonstrates that the use of HCOAs for adsorptive removal of LEV can achieve efficient and sustainable groundwater remediation, with broad potential applications.
Levofloxacin (LEV) infiltrated in groundwater has threatened the safety of drinking water. For in-situ remediation of LEV-contaminated groundwater, there exists a main challenge of exploiting proper high efficient backfill medium in utilizing charming permeable reactive barriers (PRBs). Herein, three porous shapeable threecomponent hydrogen-bonded covalent organic aerogels (HCOA-1, HCOA-2 and HCOA-3) were fabricated based on a multiple-linking-site strategy to evaluate for adsorptive removal of LEV. The three HCOAs exhibited satisfactory performance in LEV adsorption that could integrate high adsorption capacity, good antiion interference, excellent recyclability and wide pH tolerance. The different regularity of kinetics and isotherms of three HCOAs signified that electrostatic effect, pore preservation, hydrogen bonding probably govern the adsorption process in combination, coupling with 7C-7C electron-donor-acceptor (EDA), dipole-dipole and hydrophobic-hydrophobic interaction besides. In addition, the response surface methodology (RSM) was employed for studying the single and synergetic effects of selected variables and optimizing operation conditions. Furthermore, a laboratory PRB column packed with processable HCOA-2 was set up to investigate the LEV removal, and the breakthrough data was explained by Adams-Bohart, Thomas, BDST and Yoon-Nelson models. We believe could hopefully bring HCOAs into the real in-situ remediation of such challenging and persistent LEV-polluted groundwater with further massive-scale efficiently.
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