Thierry D. Marti, Diana Schweizer, Yaochun Yu, Milo R. Schärer, Silke I. Probst and Serina L. Robinson*,
{"title":"","authors":"Thierry D. Marti, Diana Schweizer, Yaochun Yu, Milo R. Schärer, Silke I. Probst and Serina L. Robinson*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":"5 1","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":6.7,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsenvironau.4c00066","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144407087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Karen L. Auzier Guimarães*, Sarah J. do Nascimento Andrade, Ahieska A. Liscano-Carreño, Ricardo B. de Oliveira and Luís R. Ribeiro Rodrigues,
{"title":"","authors":"Karen L. Auzier Guimarães*, Sarah J. do Nascimento Andrade, Ahieska A. Liscano-Carreño, Ricardo B. de Oliveira and Luís R. Ribeiro Rodrigues, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":"5 1","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":6.7,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsenvironau.4c00053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144407077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Michael G. Bertram*, Jack A. Brand, Eli S. J. Thoré, Daniel Cerveny, Erin S. McCallum, Marcus Michelangeli, Jake M. Martin, Jerker Fick and Tomas Brodin,
{"title":"","authors":"Michael G. Bertram*, Jack A. Brand, Eli S. J. Thoré, Daniel Cerveny, Erin S. McCallum, Marcus Michelangeli, Jake M. Martin, Jerker Fick and Tomas Brodin, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":"5 1","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":6.7,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsenvironau.4c00056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144407078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-07eCollection Date: 2025-03-19DOI: 10.1021/acsenvironau.4c00063
Zhuan Chen, Mingyang Xing
Heterogeneous Fenton and Fenton-like reactions, as one of the significant development directions of advanced oxidation processes (AOPs), still have some limitations that hinder their large-scale practical application. Organic carbon transfer processes (OCTPs) in AOPs including direct oxidation transfer processes (DOTPs) and changes in the solubility of pollutant reaction intermediates can lead to a significant accumulation of organics on the catalyst. The accumulation of organics severely impacts the sustainability of the catalyst and may lead to erroneous guidance about the mineralization rate of the reaction system. This perspective provides a comprehensive overview of recent research on OCTPs and presents new viewpoints and research directions for heterogeneous AOPs.
{"title":"Non-negligible Organic Carbon Transfer during Organic Pollutant Degradation Processes by Advanced Oxidation Technologies.","authors":"Zhuan Chen, Mingyang Xing","doi":"10.1021/acsenvironau.4c00063","DOIUrl":"10.1021/acsenvironau.4c00063","url":null,"abstract":"<p><p>Heterogeneous Fenton and Fenton-like reactions, as one of the significant development directions of advanced oxidation processes (AOPs), still have some limitations that hinder their large-scale practical application. Organic carbon transfer processes (OCTPs) in AOPs including direct oxidation transfer processes (DOTPs) and changes in the solubility of pollutant reaction intermediates can lead to a significant accumulation of organics on the catalyst. The accumulation of organics severely impacts the sustainability of the catalyst and may lead to erroneous guidance about the mineralization rate of the reaction system. This perspective provides a comprehensive overview of recent research on OCTPs and presents new viewpoints and research directions for heterogeneous AOPs.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":"5 2","pages":"148-151"},"PeriodicalIF":6.7,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11926745/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143693661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-20eCollection Date: 2025-03-19DOI: 10.1021/acsenvironau.4c00075
Hang Li, Blair Hanson, Garrett McKay
Chemical reduction with sodium borohydride has been used for over four decades to probe the presence and function of carbonyl-containing moieties in dissolved organic matter (DOM). One of these structure-property relationships is the attenuation of UV-visible absorbance after borohydride reduction, an effect that has been observed universally across DOM of different origins. We previously demonstrated that DOM with similar bulk physicochemical properties exhibits bifurcating reactivity with borohydride depending on the source (i.e., soil vs. aquatic), as judged by the kinetics of fractional absorbance removal during reduction at a fixed borohydride:DOM mass ratio. This result and data from other studies suggest that a portion of borohydride-reducible chromophores in DOM may be inaccessible to the water solvent, explaining the incomplete absorbance attenuation even at very high borohydride mass excesses. Here, we study the reactivity of five DOM isolates with sodium borohydride via size exclusion chromatography coupled to total organic carbon, absorbance, and fluorescence detectors. Reduction with sodium borohydride resulted in quantifiable yet exceedingly small decreases in DOM molecular weight, suggesting that the reduction of carbonyl groups to alcohols does not markedly impact the DOM secondary structure. Interestingly, higher molecular weight DOM exhibited the most prominent changes in optical properties after reduction, suggesting that larger molecules contain a high proportion of borohydride-reducible moieties. Optical surrogates were inversely correlated to molecular weight across a single isolate, both native and reduced. However, the correlation broke down at lower molecular weights, wherein optical surrogates remained constant with continued decreases in elution volume, suggesting that there is an intrinsic lower limit to the ability of optical surrogates to capture further decreases in molecular weight. Overall, these results provide insights into the DOM structure and help inform future applications of sodium borohydride for studying the DOM source and reactivity.
{"title":"Characterization of Natural Organic Matter and Humic Substance Isolates by Size Exclusion Chromatography following Reduction with Sodium Borohydride.","authors":"Hang Li, Blair Hanson, Garrett McKay","doi":"10.1021/acsenvironau.4c00075","DOIUrl":"10.1021/acsenvironau.4c00075","url":null,"abstract":"<p><p>Chemical reduction with sodium borohydride has been used for over four decades to probe the presence and function of carbonyl-containing moieties in dissolved organic matter (DOM). One of these structure-property relationships is the attenuation of UV-visible absorbance after borohydride reduction, an effect that has been observed universally across DOM of different origins. We previously demonstrated that DOM with similar bulk physicochemical properties exhibits bifurcating reactivity with borohydride depending on the source (i.e., soil vs. aquatic), as judged by the kinetics of fractional absorbance removal during reduction at a fixed borohydride:DOM mass ratio. This result and data from other studies suggest that a portion of borohydride-reducible chromophores in DOM may be inaccessible to the water solvent, explaining the incomplete absorbance attenuation even at very high borohydride mass excesses. Here, we study the reactivity of five DOM isolates with sodium borohydride via size exclusion chromatography coupled to total organic carbon, absorbance, and fluorescence detectors. Reduction with sodium borohydride resulted in quantifiable yet exceedingly small decreases in DOM molecular weight, suggesting that the reduction of carbonyl groups to alcohols does not markedly impact the DOM secondary structure. Interestingly, higher molecular weight DOM exhibited the most prominent changes in optical properties after reduction, suggesting that larger molecules contain a high proportion of borohydride-reducible moieties. Optical surrogates were inversely correlated to molecular weight across a single isolate, both native and reduced. However, the correlation broke down at lower molecular weights, wherein optical surrogates remained constant with continued decreases in elution volume, suggesting that there is an intrinsic lower limit to the ability of optical surrogates to capture further decreases in molecular weight. Overall, these results provide insights into the DOM structure and help inform future applications of sodium borohydride for studying the DOM source and reactivity.</p>","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":"5 2","pages":"197-210"},"PeriodicalIF":6.7,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11926756/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143693622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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