Effective and selective separation of perrhenate from acidic wastewater by super-stable, superhydrophobic, and recyclable biosorbent.

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Date: Feb. 2022
Publisher: Springer
Document Type: Report; Brief article
Length: 240 words

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Abstract :

Keywords: Selectivity; Adsorption; Re(VII); ZnO; Biochar Abstract The recovery of scattered metal ions such as perrhenate (Re(VII)) from industrial effluents has enormous economic benefits and promotes resource reuse. Nanoscale-metal/biochar hybrid biosorbents are attractive for recovery but are limited by their insufficient stability and low selectivity in harsh environments. Herein, a superstable biochar-based biosorbent composed of ZnO nanoparticles with remarkable superhydrophobic features is fabricated, and its adsorption/desorption capabilities toward Re(VII) in strongly acidic aqueous solutions are investigated. The ZnO nanoparticle/biochar hybrid composite (ZBC) exhibits strong acid resistance and high chemical stability, which are attributable to strong C-O-Zn interactions between the biochar and ZnO nanoparticles. Due to the advantages of its hydrolytic stability, superhydrophobicity, and abundance of Zn-O sites, the ZBC proves suitable for the effective and selective separation of Re(VII) from single, binary and multiple ion systems (pH = 1), with a maximum sorption capacity of 29.41 mg/g. More importantly, this material also shows good recyclability and reusability, with high adsorption efficiency after six adsorption-desorption cycles. The findings in this work demonstrate that a metal/biochar hybrid composite is a promising sorbent for Re(VII) separation. Author Affiliation: (1) School of Chemical Engineering, Fuzhou University, 350116, Fuzhou, China (2) Army Infantry College, 330103, Nanchang, China (a) huhui@fzu.edu.cn Article History: Registration Date: 06/02/2021 Received Date: 01/11/2021 Accepted Date: 04/26/2021 Online Date: 06/05/2021 Byline: Hui Hu (corresponding author) (1, a), Lei Jiang (1), Longli Sun (1), Yanling Gao (1), Tian Wang (2), Chenguang Lv (1)

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Gale Document Number: GALE|A667559957