文献类型：期刊文献

英文题名：Highly efficient scavenging of uranium(VI) by molybdenum disulfide loaded ferrous sulfide composites: Kinetics, thermodynamics and mechanism aspects

作者：Pan, Yixin[5];Zhang, Chen[1,2];Sheng, Guodong[3];Li, Manli[4];Linghu, Wensheng[3];Huang, Rui[5]

机构：[1]Shaoxing Univ, Sch Civil Engn, Zhoushan 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Zhoushan 312000, Zhejiang, Peoples R China;[3]Shaoxing Univ, Sch Chem & Chem Engn, Zhoushan 312000, Zhejiang, Peoples R China;[4]Shaoxing Univ, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Zhoushan 312000, Zhejiang, Peoples R China;[5]Shaoxing Univ, Dept Civil Engn, Shaoxing, Zhejiang, Peoples R China

年份：2023

卷号：142

外文期刊名：JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS

收录：SCI-EXPANDED(收录号：WOS:000895726500002)、、EI(收录号：20225013231861)、Scopus(收录号：2-s2.0-85143491539)、WOS

基金：Acknowledgments The work was supported by the Zhejiang Basic Public Welfare Research Project in 2018 year (LGG18B070002) .

语种：英文

外文关键词：MoS2@FeS; Adsorption; U(VI); Nanoparticle; Reductive conversion

外文摘要：Background: This work aims at developing a nanocomposite in which ferrous sulfide nanoparticles are loaded onto molybdenum disulfide (MoS2@FeS) for the removal of U(VI) from an aqueous solution.Methods: The removal process was carried out by batch experiment. Characterizations of MoS2 and MoS2@FeS before and after reaction have been studied by SEM-EDS, TEM, FTIR, XRD, XPS, and BET analysis.Significant findings: Reductive conversion of U(VI) to U(IV) was the primary reaction mechanism, where S(-II) is the predominant reductant. At the same time, the functional groups of-S, Fe-O, and Fe-OH can adsorb different U (VI) species. Moreover, the effects of pH, adsorbent dosage, initial concentration, reaction time, and temperature on removal were discussed and compared by batch experiments, and the outcomes show that the U(VI) removal quantity of MoS2@FeS is generally higher than MoS2 at the same condition. Finally, different kinetic models, isotherm models, and thermodynamic parameters are introduced to further explore the adsorption process and types of MoS2 and MoS2@FeS under various pH and temperatures, which demonstrate that the two materials fit well with the pseudo-second-order model and Freundlich model. This work provides a new idea that MoS2@FeS nanocomposite has high superiority and prospects for the effective decontamination of U(VI).