文献类型：期刊文献

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

作者：Liu, Shangpeng[1];Wang, Wenji[2,3];Wang, Dadong[4];Lu, Jian[2,4];Li, Yibo[2];Lv, Mingchen[1];Sun, Min[1,5];Fan, Zhen[1]

机构：[1]Tongji Univ, Sch Mat Sci & Engn, Dept Polymer Mat, Shanghai 201804, Peoples R China;[2]Shanghai Landscape Architecture Design & Res Inst, 45 Xin Rd, Shanghai 200031, Peoples R China;[3]Columbia Univ City New York, Grad Sch Architecture Planning & Preservat, 116th St & Broadway, New York, NY 10027 USA;[4]Shanghai Engn Technol Res Ctr Ecol Landscape Water, 202 Wukang Rd, Shanghai 200031, Peoples R China;[5]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：19

期号：5

外文期刊名：MATERIALS

收录：;EI(收录号：20261120268779);WOS:【SCI-EXPANDED(收录号:WOS:001713758600001)】；

语种：英文

外文关键词：polydopamine; coir fiber; heavy metal ion adsorption; biosafety

摘要：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.