文献类型：期刊文献

英文题名：Removal of strontium by in situ electrochemical synthesis of Zn-Al LDHs using a bidirectional pulse method

作者：Peng, Shiming[1];Jiang, Li[1];Yu, Xian[1];Yang, Xing[1];Huang, Guangtuan[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：45

期号：44

起止页码：20915

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20214711201410);WOS:【SCI-EXPANDED(收录号:WOS:000713777000001)】；

语种：英文

外文关键词：Nuclear fuels - Strontium - Binary alloys - Strontium compounds - Aluminum alloys - Zinc alloys - Adsorption - Nuclear power plants - Monolayers

摘要：In this study, in situ electrochemical synthesis of Zn-Al-LDHs with a bidirectional pulse power supply was applied to remove Sr2+ from the simulated liquid radioactive waste from nuclear power plants. The removal rate of Sr2+ can reach up to 99.26% under the optimal conditions of the bidirectional pulse power supply: a current density of 57 mA cm(-2) (Zn electrode), a reversal time of 25 s, a frequency of 1000 Hz, a duty ratio of 80%, and a Zn/Al current ratio of 2 : 1. The Sr2+ adsorption behavior was also investigated. Adsorption kinetics studies suggested that the adsorption process followed the Lagergren pseudo-second-order kinetic model with good correlation. The adsorption process, preferably fitting the Langmuir isotherm model, suggested the monolayer adsorption of Sr2+ on Zn-Al-LDHs. Thermodynamic parameters revealed that the electrolysis process and the aging process were endothermic and exothermic, respectively.