Efficient removal of antibiotics from wastewater by chitosan/ polyethyleneimine/Ti3C2 3 C 2 MXene composite hydrogels: Synthesis, adsorption, kinetics and mechanismse

被引:7
|
作者
Li, Yan [1 ]
Zhang, Han [1 ]
Qu, Guo [1 ]
Xie, Lingying [1 ]
Tang, Sisi [1 ]
Lei, Hang [1 ]
Zhong, Yuxia [1 ]
Zhang, Yue-Fei [1 ]
机构
[1] Changsha Univ Sci & Technol, Sch Chem & Chem Engn, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Changsha 410114, Hunan, Peoples R China
关键词
Chitosan; Ti; 3; C; 2; Hydrogel; Adsorption; CONGO RED; PERFORMANCE; OZONATION; CELLULOSE; ISOTHERM;
D O I
10.1016/j.colsurfa.2024.135111
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A novel chitosan-based composite hydrogel (CS/PEI-MXene) made of polyethyleneimine and Ti3C2 3 C 2 MXene as modifiers and acrolein as crosslinker has been synthesized simply and conveniently, which could be applied in the removal of residual antibiotic pharmaceuticals (chlortetracycline (CTC), ibuprofen (IBU), etc.) from aqueous environments. The CS/PEI-MXene was used as an adsorbent for chlortetracycline and ibuprofen. The removal rates of CTC and IBU could be achieved to 91.1 % and 99.25 %, respectively. In addition, the reusability of CS/ PEI-MXene for CTC and IBU appeared good capacity, and the removal rate was maintained at approximately 70 % after five cycles. FT-IR, XPS, and zeta potential were used to show that the hydrogel was successfully synthesized, and its physicochemical characteristics were studied. Systematically examined were conducted on the effects of pH (3-10), contact time (0-120 min), and temperature (30-40 degrees C) on the adsorption efficiency of CS/PEI-MXene. The adsorption mechanism of CS/PEI-MXene on CTC and IBU mainly included electrostatic interactions and hydrogen bonding. Overall, the development of MXene based hydrogel adsorbent will provide a practical approach to the treatment of wastewater containing antibiotic pharmaceuticals and have great potential for practical applications.
引用
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页数:11
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