Feasible fabrication of o-phenanthroline-based polymer adsorbent for selective capture of aqueous Ag(Ⅰ)  

作　　者：Xuan Ding Wanjun Yu Xin Sheng Hui Shi Deng You Mingming Peng Penghui Shao Liming Yang Lingling Liu Xubiao Luo 

机构地区：[1]Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle,Nanchang Hangkong University,Nanchang 330063,China [2]National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization,Nanchang Hangkong University,Nanchang 330063,China

出　　处：《Chinese Chemical Letters》2023年第3期191-194,共4页中国化学快报（英文版）

基　　金：financially supported by the National Science Fund for Distinguished Young Scholars(No.52125002);the National Science Foundation of China(No.52100043);the National Key Research and Development Program of China(No.2019YFC1907900);the National Science Foundation of Jiangxi Province(No.20202BABL213037)。

摘　　要：Devising a desirable adsorbent for efficiently selective capture of Ag(Ⅰ) from wastewater has attracted much attention but faced with huge challenges. Herein, a novel linear o-phenanthroline-based polymer L-PRL was prepared via chemical oxidative polymerization for the adsorption of Ag(Ⅰ). The maximum adsorption capacity for Ag(Ⅰ) by L-PRL is 325.8 mg/g at pH 0. In addition, L-PRL owes ascendant selectivity for Ag(Ⅰ) from aqueous solutions containing various interfering metal ions of Pb(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Cd(Ⅱ)and Fe(Ⅲ). Multiple characterizations of FT-IR and XPS uncover that the N groups on L-PRL act as adsorption sites to coordinate with Ag(Ⅰ). Density functional theory(DFT) calculations further evidence the mechanism that L-PRL is provided with the admirable adsorptivity and selectivity for Ag(Ⅰ). It is mainly attributed to the most stable complexes of L-PRL with Ag(Ⅰ), which possesses shortest Ag-N bond length compared with other heavy metal ions. Furthermore, 93.5% of initial adsorption capacity is reserved after four continuous regeneration cycles, indicating that L-PRL is equipped with superior recyclability and durability, and L-PRL is capable of removing Ag(Ⅰ) in low-concentration actual Ag(Ⅰ)-containing wastewater completely. This study shed light on the rational design of polymer adsorbents and in-depth insight into selective removal of aqueous Ag(Ⅰ).

关 键 词：Wastewater O-PHENANTHROLINE POLYMER ADSORBENT Ag(Ⅰ) Selective capture 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]