Upcycling Coir Fiber into Polydopamine-Enabled Adsorbents for Efficient Cu(II)/Cd(II) Removal and Effluent Safety.

Shangpeng Liu, Wenji Wang, Dadong Wang, Jian Lu, Yibo Li, Mingchen Lv, Min Sun, Zhen Fan

Abstract read

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Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Shangpeng LiuDepartment of Polymeric Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.

Wenji WangShanghai Landscape Architecture Design and Research Institute, 45 Xin Le Road, Shanghai 200031, China.

Dadong WangShanghai Engineering Technology Research Center for Ecological Landscape Water Environment, 202 Wukang Road, Shanghai 200031, China.

Jian LuShanghai Landscape Architecture Design and Research Institute, 45 Xin Le Road, Shanghai 200031, China.

Yibo LiShanghai Landscape Architecture Design and Research Institute, 45 Xin Le Road, Shanghai 200031, China.

Mingchen LvDepartment of Polymeric Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.

Min SunDepartment of Polymeric Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.ORCID 0000-0002-3025-8331

Zhen FanDepartment of Polymeric Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.ORCID 0000-0003-4199-0082

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Heavy metal pollution remains a global environmental challenge, calling for sustainable and low-cost sorbents. Here, we upcycle coir fiber into a bioinspired adsorbent by depositing a polydopamine (PDA) coating (PDA/Coir fiber) for efficient Cu(II) and Cd(II) removal from water while improving effluent safety. Scanning electron microscopy (SEM), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and thermal gravimetric analysis (TGA) confirm successful PDA functionalization and associated structural changes. Compared with pristine coir fiber, PDA/Coir fiber shows 6.84-fold and 12.86-fold higher adsorption capacities for Cu(II) and Cd(II), respectively. Adsorption is well described by the Langmuir isotherm, indicating monolayer-dominated binding. Kinetic analysis shows that the adsorption of both ions follows the pseudo-second-order model. The fiber also exhibits good reusability over four adsorption-desorption cycles. Importantly, cytotoxicity assays of the treated solutions show substantially reduced biotoxicity after metal removal. Overall, PDA/Coir fiber offers a sustainable and low-cost platform for heavy metal removal by integrating efficient adsorption capabilities and safety implications.

Indexed as

biosafetycoir fiberheavy metal ion adsorptionpolydopamine

Identifiers

PMID41828202

DOI10.3390/ma19050935

PMCPMC12986166

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.