Yi Tan, Shiyin Ji, Renren Wang, Zitong Yan, Shouye Liu, Zhiwei Mou, Yawen Liu, Guangyuan Chen, Tao Duan and Lin Zhu
{"title":"Mechanisms of Se(iv) incorporation in jarosite and its migration behavior during thermal aging†","authors":"Yi Tan, Shiyin Ji, Renren Wang, Zitong Yan, Shouye Liu, Zhiwei Mou, Yawen Liu, Guangyuan Chen, Tao Duan and Lin Zhu","doi":"10.1039/D4TA04140B","DOIUrl":null,"url":null,"abstract":"<p >Secondary minerals such as jarosite have pivotal implications for the migration of trace elements. The long-term fate of selenium is directly related to its behavior during thermal aging after adsorption on minerals, and understanding the behavior of selenium during mineral phase transitions is important for the safe disposal of radioactive anions in solid phases. By combining macroscopic sorption experiments with basic characterization, we investigated the mechanisms of Se(<small>IV</small>) sorption on jarosite and the thermal conversion process (180 °C) of jarosite under alkaline conditions. The results showed that the adsorption process of jarosite is induced by ion exchange between SO<small><sub>4</sub></small><small><sup>2−</sup></small> and SeO<small><sub>3</sub></small><small><sup>2−</sup></small>, jarosite can be converted into hematite during the aging process after Se(<small>IV</small>) adsorption, and Se(<small>IV</small>) remains solidified in the mineral in the form of ferric selenite despite the phase change. This study improves our understanding of how the thermal transformation of jarosite can influence Se(<small>IV</small>) mobility and Se(<small>IV</small>) partitioning.</p>","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ta/d4ta04140b","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Secondary minerals such as jarosite have pivotal implications for the migration of trace elements. The long-term fate of selenium is directly related to its behavior during thermal aging after adsorption on minerals, and understanding the behavior of selenium during mineral phase transitions is important for the safe disposal of radioactive anions in solid phases. By combining macroscopic sorption experiments with basic characterization, we investigated the mechanisms of Se(IV) sorption on jarosite and the thermal conversion process (180 °C) of jarosite under alkaline conditions. The results showed that the adsorption process of jarosite is induced by ion exchange between SO42− and SeO32−, jarosite can be converted into hematite during the aging process after Se(IV) adsorption, and Se(IV) remains solidified in the mineral in the form of ferric selenite despite the phase change. This study improves our understanding of how the thermal transformation of jarosite can influence Se(IV) mobility and Se(IV) partitioning.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.