文献类型：期刊文献

英文题名：Efficient adsorption of strontium by in situ electrochemical synthesis of monohydric phosphate intercalated layered double hydroxides

作者：Yu, Xian[1];Peng, Shiming[1];Cao, Wei[1];Huang, Guangtuan[1]

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

年份：2022

卷号：46

期号：38

起止页码：18190

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20224112864059);WOS:【SCI-EXPANDED(收录号:WOS:000853104100001)】；

语种：英文

外文关键词：Absorption spectroscopy - Aluminum compounds - Nuclear fuels - Nuclear power plants - Strontium compounds - X ray diffraction

摘要：In this study, in situ electrochemical synthesis of a monohydric phosphate intercalated layered double hydroxide was used to treat simulated strontium-containing low-level waste liquids. The removal rate of Sr2+ was 99.24% and the adsorption capacity of Zn-Al-LDHs toward Sr2+ was 6.01 mg g(-1) under the optimal conditions: a current density of 20 mA cm(-2) (Zn electrode), a HPO42- concentration of 0.006 mol L-1, a Zn/Al current ratio of 2 :1, a reaction time of 120 min, a reaction temperature of 60 degrees C, and an initial pH of 10. The synthesized precipitates were characterized by SEM-EDS, XRD and FT-IR. The precipitate shows the phenomenon of lamellar agglomeration. The XRD pattern indicated that zinc-aluminum hydrotalcite intercalated with a monohydric phosphate was successfully synthesized. The absorption peaks of O-H bonds, O-M-O bonds (M is Zn, Al) and P-O bonds appeared in the infrared spectrum. Therefore, the method of in situ electrochemical synthesis of layered double hydroxides is promising for the removal of strontium in liquid radioactive wastes from nuclear power plants.