Wang Yao, Zhang Xinyue, Ju Na, Jia Hongna, Sun Zejun, Liang Jiaxing, Guo Rongxiu, Niu Dun, Sun Hong-Bin
Department of Chemistry, Northeastern University, Shenyang 110819, China.
Department of Chemistry, Northeastern University, Shenyang 110819, China; School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
J Environ Sci (China). 2023 Apr;126:211-221. doi: 10.1016/j.jes.2022.05.050. Epub 2022 Jun 6.
Antimony is more than an emerging pollutant in water but a scare resource. In this study, we report an adsorbent with the record capacity so far from the balanced view of Sb(III) and Sb(V). The composite adsorbent was fabricated by encapsulating hollow FeO nanosphere with the EDTA grafted chitosan, and it has superhigh adsorption capacity of for 657.1 mg/g for Sb(III) and 467.3 mg/g for Sb(V), respectively. The mechanism study reveals that the adsorption of Sb initializes from the FeO, propagates along the chitosan with hydrogen bond, and terminates at the inner sphere complex with the EDTA moiety in the adsorbent. In view of the ultra-high adsorption capacity of the adsorbent, the recovered adsorbent that contains abundant (>36.4%) highly dispersed antimony nanoparticles (600-FCSE-Sb) is applied to Li-ion battery anode after reduction. This article provides a new idea for connecting water treatment and electric energy storage.
锑不仅是一种新兴的水中污染物，更是一种稀缺资源。在本研究中，我们从三价锑（Sb(III)）和五价锑（Sb(V)）的平衡角度报道了一种迄今为止具有创纪录吸附容量的吸附剂。该复合吸附剂是通过用乙二胺四乙酸（EDTA）接枝的壳聚糖包裹空心FeO纳米球制备而成，其对Sb(III)的吸附容量高达657.1 mg/g，对Sb(V)的吸附容量为467.3 mg/g。机理研究表明，锑的吸附始于FeO，通过氢键沿着壳聚糖传播，并在内球与吸附剂中的EDTA部分形成络合物而终止。鉴于该吸附剂的超高吸附容量，还原后含有大量（>36.4%）高度分散锑纳米颗粒（600-FCSE-Sb）的回收吸附剂被应用于锂离子电池负极。本文为连接水处理和电能存储提供了新思路。
