Hong, Hye-Jin Yu, Hayoung Hong, Seung ki Hwang, Jun Yeon Kim, Seung Min Park, Min Sang Jeong, Hyeon Su 2024-01-19T18:31:43Z 2024-01-19T18:31:43Z 2021-09-05 2020-01 0144-8617 https://pubs.kist.re.kr/handle/201004/119149 Rising demand and elemental rarity requires the recycling of precious metals such as platinum group elements (PGMs). Recently, biosorption has been focused on the capability of recovering precious metals, but in practice, recycling is inefficient or far away from a closed-loop material system. Here we use a polyethylenimine (PEI)-grafted spun-fiber made of cellulose nanofibril (CNF) extracted from a tunicate as a biosorbent for PGMs. Liquid crystallinity (LC) of TCNF suspension appears to contribute the generation of well-developed open porous structure in the fiber. We show the fiber has the selectivity and high capacity of Pt (120.2 mg/g, 86%) and Pd (26.5 mg/g, 74.2%) adsorption under the presence of other metals in simulated automobile waste. The adsorbed Pt and Pd with nano-scale clusters were uniformly distributed on the porous surface, which were directly applied as a catalyst. These results propose an easy approach to recover precious metals and reuse them directly, thereby closing loops of metal recycling. English Pergamon Press Ltd. Modified tunicate nanocellulose liquid crystalline fiber as closed loop for recycling platinum-group metals Article 10.1016/j.carbpol.2019.115424 1 Carbohydrate Polymers, v.228 Carbohydrate Polymers 228 N scie scopus 000490980600020 2-s2.0-85073026696 Chemistry, Applied Chemistry, Organic Polymer Science Chemistry Polymer Science Article WATER CELLULOSE RECOVERY POLYETHYLENEIMINE NANOFIBERS CHALLENGES ADSORBENT AEROGELS REMOVAL CU(II) Platinum group metal (PGM) Recycle Nanocellulose Liquid crystal Catalyst Closed loop