Hong, Hye-Jin Yu, Hayoung Park, Minsang Jeong, Hyeon Su 2024-01-19T20:04:43Z 2024-01-19T20:04:43Z 2021-09-02 2019-04 0144-8617 https://pubs.kist.re.kr/handle/201004/120102 Nanocellulose is a promising biosorbent for the recovery of precious metals from waste streams. A variety of nanocelluloses exhibit significant different properties that depend on the natural source and type. In this study, cellulose nanofibrils(P-CNF) and cellulose nanocrystals(P-CNC) obtained from hard wood pulp and CNF from tunicates(T-CNF) were evaluated for their ability to recover platinum(Pt) after modification with polyethyleneimine(PEI). The PEI grafting density on each nanocellulose was distinct, resulting in significant variations in the Pt adsorption performance. The Pt adsorption capacity of the PEI-modified nanocelluloses followed the order T-CNF > > P-CNC > P-CNF. The inherent characteristics of T-CNF, that is, the negative charge and high surface area caused by open porous structure, were found attributed to the grafting of approximate to 40% PEI and the excellent Pt adsorption capacity(approximate to 600 mg/g). Also PEI-modified T-CNF exhibited high selectivity towards Pt in the presence of other metals. Finally, PEI modified T-CNF was applied for Pt recovery from simulated spent automobile catalyst leachate to prove feasibility in a real application. English Pergamon Press Ltd. Recovery of platinum from waste effluent using polyethyleneimine-modified nanocelluloses: Effects of the cellulose source and type Article 10.1016/j.carbpol.2019.01.079 1 Carbohydrate Polymers, v.210, pp.167 - 174 Carbohydrate Polymers 210 167 174 N scie scopus 000457707300019 2-s2.0-85060440218 Chemistry, Applied Chemistry, Organic Polymer Science Chemistry Polymer Science Article NANOCRYSTALS ADSORBENT DEGRADATION BIOSORPTION NANOFIBERS PALLADIUM ALGINATE METALS Platinum group metal Recovery Nanocelluloses Selective adsorption Leachate