Volume 142, Issue 13 e56652
RESEARCH ARTICLE

Dopamine-Assisted Polyethyleneimine Deposition Modification of Hypercrosslinked Polystyrene for Enhanced Adsorption of the Dye Congo Red

Suning Huang

Suning Huang

Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China

University of the Chinese Academy of Sciences, Beijing, People's Republic of China

CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, People's Republic of China

Contribution: Data curation (lead), Formal analysis (lead), Methodology (lead), Validation (lead), Writing - original draft (lead), Writing - review & editing (lead)

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Zicheng Xie

Zicheng Xie

Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China

University of the Chinese Academy of Sciences, Beijing, People's Republic of China

CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, People's Republic of China

Contribution: Conceptualization (supporting), Methodology (supporting)

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Haixin Zhu

Haixin Zhu

Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China

University of the Chinese Academy of Sciences, Beijing, People's Republic of China

CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, People's Republic of China

Contribution: Methodology (supporting)

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Shanshan Jiang

Shanshan Jiang

Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China

University of the Chinese Academy of Sciences, Beijing, People's Republic of China

CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, People's Republic of China

Contribution: Methodology (supporting)

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Sheng Lu

Sheng Lu

Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China

University of the Chinese Academy of Sciences, Beijing, People's Republic of China

CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, People's Republic of China

Contribution: Methodology (supporting)

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Yuewen Huang

Yuewen Huang

Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China

University of the Chinese Academy of Sciences, Beijing, People's Republic of China

CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, People's Republic of China

CASH GCC Shaoguan Research Institute of Advanced Materials, Nanxiong, People's Republic of China

CASH GCC (Nanxiong) Research Institute of Advanced Materials co. Ltd., Nanxiong, People's Republic of China

Contribution: Methodology (supporting)

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Bin Wang

Corresponding Author

Bin Wang

Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, People's Republic of China

University of the Chinese Academy of Sciences, Beijing, People's Republic of China

CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, People's Republic of China

CASH GCC Shaoguan Research Institute of Advanced Materials, Nanxiong, People's Republic of China

CASH GCC (Nanxiong) Research Institute of Advanced Materials co. Ltd., Nanxiong, People's Republic of China

Correspondence:

Bin Wang ([email protected])

Contribution: Conceptualization (supporting), Funding acquisition (lead), Methodology (supporting), Supervision (equal), Writing - review & editing (equal)

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First published: 28 December 2024

Funding: The authors received no specific funding for this work.

ABSTRACT

Congo red dye wastewater is highly toxic and nondegradable, posing a significant threat to the environment. Hypercrosslinked porous materials (HCP) are effective candidates for the removal of dyes from wastewater. In this study, hypercrosslinked polystyrene (HCPS) with high specific area (1073.08 m2/g) was synthesized by using waste expanded polystyrene (EPS) as starting material. HCPS was then modified through a simple dopamine-assisted deposition of polyethyleneimine, resulting in the modified material HCPS@PDA/PEI, which retained a significant specific surface area of 738.36 m2/g and a porous structure with abundant functional groups. HCPS@PDA/PEI exhibits remarkable efficacy as a high-performance adsorbent for the removal of Congo red (CR) from aqueous solutions. The adsorption process of CR conforms to the pseudo-second-order kinetic model. Further fitting with the Langmuir isotherm model elucidates that the adsorption of CR occurs as a monolayer chemical adsorption, with a maximum adsorption capacity of 1030.31 mg/g, which is triple that of the unmodified HCPS (291.54 mg/g). The adsorption activation energy and thermodynamic parameters substantiate that the adsorption process is chemical in nature, spontaneous, and endothermic. Consequently, HCPS@PDA/PEI holds considerable promise for applications in the treatment of dye-contaminated wastewater.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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