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
TL;DR
This paper presents a sustainable method to remove copper and cadmium from water using upcycled coir fiber coated with polydopamine, improving both efficiency and safety.
Contribution
The novel contribution is the development of a polydopamine-coated coir fiber adsorbent with significantly enhanced heavy metal removal and reduced biotoxicity.
Findings
PDA/Coir fiber shows 6.84-fold and 12.86-fold higher adsorption capacities for Cu(II) and Cd(II) compared to pristine coir fiber.
Adsorption follows the Langmuir isotherm and pseudo-second-order kinetic model, indicating monolayer binding and efficient uptake.
The treated solutions show reduced biotoxicity, demonstrating improved effluent safety after metal removal.
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…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAdsorption and biosorption for pollutant removal · Polymer Surface Interaction Studies · Nanomaterials for catalytic reactions