Jebril Hadi, Jean-Marc Greneche, Paul Wersin, Petri Koho, Barbara Pastina
{"title":"Determination of Sulfide Consumption by Fe-bearing Components of Bentonites","authors":"Jebril Hadi, Jean-Marc Greneche, Paul Wersin, Petri Koho, Barbara Pastina","doi":"10.1007/s42860-023-00254-4","DOIUrl":"https://doi.org/10.1007/s42860-023-00254-4","url":null,"abstract":"Abstract Geologic repositories for spent nuclear fuel use bentonite as a buffer to protect the metallic containers confining the radioactive material. Sulfate-reducing bacteria, which may be present in groundwater, at the bentonite–host rock interface or eventually within the bentonite may produce sulfide, representing a potential threat for the metallic canisters, particularly copper. Bentonites can act as potential sulfide scavengers. Little is yet known, however, regarding the underlying mechanisms, the maximum extent of sulfide consumption, and the potential impacts on bentonite structure under repository conditions. In the current study, concentrated (4–150 mM) sulfide solutions were reacted in batch experiments with six natural Fe-bearing bentonites, with various purified Fe-bearing components of bentonite (a series of purified montmorillonites and three iron (oxyhydr)oxides), and with one synthetic mixture, for up to 1.5 months at pH values ranging from 7 to 13. The solutions were analyzed by colorimetry to determine sulfide and polysulfide concentrations and the solids were analyzed by 57 Fe Mössbauer spectrometry to determine iron speciation. Important sulfide consumption coupled with a reduction of structural Fe in the clay samples was observed. Not all clay structural Fe was reactive toward sulfide; the proportion of active structural Fe depended on the clay structure and pH. In the presence of excess sulfide in solution regarding Fe in the solid sample, the clay structural Fe was found to be the main reactant while the reaction with iron (oxyhydr)oxides was largely inhibited. Three bentonite groups were distinguished, based on the sulfide oxidation capacity of their main clayey component.","PeriodicalId":10320,"journal":{"name":"Clays and Clay Minerals","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135729039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chadha Mejri, Walid Oueslati, Abdesslem Ben Haj Amara
{"title":"From Coupling Second-Order Stresses to Understanding and Predicting the Structural Response of a Dioctahedral Smectite","authors":"Chadha Mejri, Walid Oueslati, Abdesslem Ben Haj Amara","doi":"10.1007/s42860-023-00253-5","DOIUrl":"https://doi.org/10.1007/s42860-023-00253-5","url":null,"abstract":"","PeriodicalId":10320,"journal":{"name":"Clays and Clay Minerals","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135918224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Criouet, J. C. Viennet, F. Baron, E. Balan, A. Buch, L. Delbes, M. Guillaumet, L. Remusat, S. Bernard
{"title":"Influence of pH on the Hydrothermal Synthesis of Al-Substituted Smectites (Saponite, Beidellite, and Nontronite)","authors":"I. Criouet, J. C. Viennet, F. Baron, E. Balan, A. Buch, L. Delbes, M. Guillaumet, L. Remusat, S. Bernard","doi":"10.1007/s42860-023-00255-3","DOIUrl":"https://doi.org/10.1007/s42860-023-00255-3","url":null,"abstract":"","PeriodicalId":10320,"journal":{"name":"Clays and Clay Minerals","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136210742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alimpia Borah, A. Borah, Monti Gogoi, R. Goswami, S. Hazarika
{"title":"Organic Exfoliation of Hydrophilic Bentonite using Aliquat 336 and Isobutyl(Trimethoxy)Silane to Enhance its Activity Toward pH-Dependent Adsorption of Epigallocatechin Gallate","authors":"Alimpia Borah, A. Borah, Monti Gogoi, R. Goswami, S. Hazarika","doi":"10.1007/s42860-023-00246-4","DOIUrl":"https://doi.org/10.1007/s42860-023-00246-4","url":null,"abstract":"","PeriodicalId":10320,"journal":{"name":"Clays and Clay Minerals","volume":"1 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41867711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Silicon Incorporation Reduces the Reactivity of Short-range Ordered Aluminosilicates Toward Organic Acids","authors":"Katharina R. Lenhardt, Mathias Stein, T. Rennert","doi":"10.1007/s42860-023-00248-2","DOIUrl":"https://doi.org/10.1007/s42860-023-00248-2","url":null,"abstract":"","PeriodicalId":10320,"journal":{"name":"Clays and Clay Minerals","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44038438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Characteristics and Production Technologies of Byzantine Building Bricks from the Anaia Church in Western Anatolia","authors":"Elif Çam, Elif Uğurlu Sağın","doi":"10.1007/s42860-023-00247-3","DOIUrl":"https://doi.org/10.1007/s42860-023-00247-3","url":null,"abstract":"","PeriodicalId":10320,"journal":{"name":"Clays and Clay Minerals","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43828779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hongxiao Qu, Tong Liu, Ruijue Hu, Hao Qu, Yichi Zhang, Hui Yang, Haiquan Su, Yue Su
{"title":"Delaminated and Pit-rich Nano-kaolinites obtained via an Intercalation-etching Method and their Application to Fischer–Tropsch Synthesis","authors":"Hongxiao Qu, Tong Liu, Ruijue Hu, Hao Qu, Yichi Zhang, Hui Yang, Haiquan Su, Yue Su","doi":"10.1007/s42860-023-00249-1","DOIUrl":"https://doi.org/10.1007/s42860-023-00249-1","url":null,"abstract":"","PeriodicalId":10320,"journal":{"name":"Clays and Clay Minerals","volume":"71 1","pages":"448 - 460"},"PeriodicalIF":2.2,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48009169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}