Carbonized ZIF-8/chitosan biomass imprinted hybrid carbon aerogel for phenol selective removal from wastewater

Yun Qu; Lei Qin; Xuguang Liu

doi:10.1016/j.carbpol.2022.120268

Carbonized ZIF-8/chitosan biomass imprinted hybrid carbon aerogel for phenol selective removal from wastewater

Carbohydr Polym. 2023 Jan 15:300:120268. doi: 10.1016/j.carbpol.2022.120268. Epub 2022 Oct 26.

Authors

Yun Qu¹, Lei Qin², Xuguang Liu³

Affiliations

¹ College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030000, China.
² Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030000, China.
³ College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, China. Electronic address: liuxuguang@tyut.edu.cn.

PMID: 36372491
DOI: 10.1016/j.carbpol.2022.120268

Abstract

In this work, carbonized ZIF-8/chitosan imprinted hybrid carbon aerogel (MIP@CZIF-8/CS) is constructed. The introduction of CZIF-8 effectively optimizes the specific surface area (664 m² g^-1) of imprinted matrix and further enhances the nitrogen atom doping, leading the increased adsorption sites and the formation of superhydrophilic surface. MIP@CZIF-8/CS exhibits a remarkable phenol adsorption capacity (246.6 mg g^-1) at pH of 7 and shows excellent selective adsorption towards phenol against its structural analogues. The adsorption kinetics and isotherms of MIP@CZIF-8/CS follow pseudo-second-order and Langmuir-Freundlich models, respectively. Besides, MIP@CZIF-8/CS with monolithic structure can support about 4167 times its own weight. Thanks to its monolithic structure and excellent mechanical stability, MIP@CZIF-8/CS maintains 94 % adsorption capacity after 10 cycle tests and does not contaminate application system. In addition, MIP@CZIF-8/CS can realize the dynamic filtration of phenol in fixed bed column system. The effluent phenol concentration conforms to GB8978-1996, proving its practical application potential.

Keywords: Carbonized ZIF-8; Chitosan; Imprinted carbon aerogel; Monolithic adsorbent; Phenol selective adsorption.

MeSH terms

Adsorption
Biomass
Carbon
Chitosan* / chemistry
Hydrogen-Ion Concentration
Kinetics
Phenol
Phenols
Wastewater
Water Pollutants, Chemical* / chemistry

Substances

Waste Water
Phenol
Chitosan
Carbon
Phenols
Water Pollutants, Chemical