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

作　　者：Hui Hu Lei Jiang Longli Sun Yanling Gao Tian Wang Chenguang Lv 

机构地区：[1]School of Chemical Engineering,Fuzhou University,Fuzhou 350116,China [2]Army Infantry College,Nanchang 330103,China

出　　处：《Frontiers of Environmental Science & Engineering》2022年第2期75-86,共12页环境科学与工程前沿（英文）

摘　　要：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.

关 键 词：Selectivity Adsorption Re(VII) ZnO BIOCHAR 

分 类 号：X703[环境科学与工程—环境工程]