Volume 139, Issue 18 52050
ARTICLE

Copolymerization of catechol and polyethyleneimine onto activated carbon for efficient removal of Congo red dye

Dexiang Yan

Dexiang Yan

Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China

Search for more papers by this author
Fenghua Li

Fenghua Li

Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China

Search for more papers by this author
Bin Sun

Bin Sun

Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China

Search for more papers by this author
Yuanbo Wang

Yuanbo Wang

Shandong Land and Space Ecological Restoration Center, Jinan, China

Search for more papers by this author
Qinze Liu

Qinze Liu

Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China

State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China

Search for more papers by this author
Tingting Gao

Corresponding Author

Tingting Gao

Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China

State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China

Correspondence

Tingting Gao, Daxue Road, Western University Science Park, Jinan 250353, Shandong, China.

Email: [email protected]

Search for more papers by this author
Guowei Zhou

Guowei Zhou

Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China

Search for more papers by this author
First published: 21 December 2021
Citations: 6

Funding information: Opening program of State Key Laboratory of Solid Lubrication, Grant/Award Number: LSL-1904; Program for Scientific Research Innovation Team in Colleges and Universities of Jinan, Grant/Award Number: 2018GXRC006; Key Technology Research and Development Program of Shandong, Grant/Award Numbers: 2019GGX102027, 2019GGX102070; National Natural Science Foundation of China, Grant/Award Numbers: 51572134, 51972180; Natural Science Foundation of Shandong Province, Grant/Award Numbers: ZR2019BB030, ZR2020ME082

Abstract

In this work, a new AC@Catechol/PEI adsorbent was prepared via the copolymerization of catechol and polyethyleneimine (PEI) onto pretreated commercial activated carbon (AC). It achieved a high adsorption capacity of 411.52 mg/g for the anionic dye Congo red (CR), which was approximately 7 times that of pretreated AC without modification. In bath adsorption experiment, 1 g of adsorbent was used to treat 4 L of 100 mg/L CR solution, resulting in 98.5% CR removal. In addition, the prepared AC@Catechol/PEI adsorbent exhibited highly efficient CR competitive adsorption against SO42− ions and cationic malachite green dye. The adsorption mechanism was mainly attributed to electrostatic interactions, hydrogen bonding, and ππ stacking. Catecholamine modification greatly improved the adsorption capacity and adsorption selectivity of commercial AC for CR dyes. This low-cost adsorbent may have broad prospects for the removal of anionic dyes in wastewater.

DATA AVAILABILITY STATEMENT

No. Research data are not shared.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.