Hong, Hye-Jin Ban, Garram Kim, Hee Seo Jeong, Hyeon Su Park, Min Sang 2024-01-19T14:01:45Z 2024-01-19T14:01:45Z 2021-10-21 2021-09 0045-6535 https://pubs.kist.re.kr/handle/201004/116552 Heavy metal contamination in wastewater is a serious problem due to its high toxicity. In this study, three-dimensional porous and flexible polyethylene imine grafted cellulose nanofibril aerogel (PEI@CNF aerogel) is synthesized as a highly efficient biosorbent for continuous treatment of wastewater containing copper (Cu2+). The synthesized PEI@CNF aerogel efficiently separates Cu2+ from wastewater and exhibits outstanding selectivity for Cu2+ in the presence of other metal ions. The amine groups in polyethylene imine (PEI) grafted onto the porous cellulose nanofibrils (CNFs) scaffold form chelates with Cu2+ thereby effectively adsorbing Cu2+. The combination of a flexible CNF scaffold and rigid PEI results in a durable elastic matrix of the aerogel providing excellent wet stability, shape recovery property and recycle ability of PEI@CNF aerogel. Finally, in the column test, the PEI@CNF aerogel treats 88 bed volumes of wastewater containing Cu2+(similar to 20 mg/L). This result demonstrates that PEI@CNF aerogels are practically viable and highly efficient bio-sorbents for the treatment of wastewater containing Cu2+. (C) 2021 Published by Elsevier Ltd. English Pergamon Press Ltd. Fabrication of cylindrical 3D cellulose nanofibril(CNF) aerogel for continuous removal of copper(Cu2+) from wastewater Article 10.1016/j.chemosphere.2021.130288 1 Chemosphere, v.278 Chemosphere 278 N scie scopus 000659471700063 2-s2.0-85103563918 Environmental Sciences Environmental Sciences & Ecology Article RECOVERY ELECTROCOAGULATION POLYETHYLENEIMINE ADSORBENT TOXICITY CU(II) Chemical mechanical polishing wastewater (CMP) Nanocellulose aerogel Copper Removal