Fatma Guler*, Yubin Ding, Hannah S. Leese, Bernardo Castro-Dominguez and Christopher J. Chuck,
{"title":"","authors":"Fatma Guler*, Yubin Ding, Hannah S. Leese, Bernardo Castro-Dominguez and Christopher J. Chuck, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 25","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":7.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acssuschemeng.5c02288","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qian Liang, Lingbo Wu, Qiqi Li, Huayong Chen, Bo Yang, Yonghua Wang, Zhigang Li, Yunjian Ma
{"title":"Simultaneous Partitioning and Enrichment of PUFAs in Algal Oil via Enzymatic Hydrolysis and Decarboxylation Based on an Innovative Ionic Liquid Three-Phase System","authors":"Qian Liang, Lingbo Wu, Qiqi Li, Huayong Chen, Bo Yang, Yonghua Wang, Zhigang Li, Yunjian Ma","doi":"10.1021/acssuschemeng.5c03643","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c03643","url":null,"abstract":"Microalgal oil represents a sustainable source of polyunsaturated fatty acids (PUFAs), essential nutrients with significant health implications. This study introduces an innovative ionic liquid three-liquid phase system (IL-TLPS) to simultaneously convert non-PUFAs into biofuels and concentrate PUFAs, addressing nutritional, energy, and environmental concerns. The IL phase effectively facilitated substrate oil interaction, substantially reducing particle size. This reduction augmented the interfacial area between the substrate oil and the <i>Cv</i>FAP-containing aqueous phase, promoting efficient fatty acid separation and PUFA recovery from free fatty acids (FFAs). A tandem hydrolysis–decarboxylation–rehydrolysis process, coupled with the IL-TLPS, reduced the FFA content from 18.74% to 4.91%. Subsequently, secondary hydrolysis of the decarboxylated algal oil increased the PUFA content in the upper phase from 48.86% to 56.89%, with 38.59% PUFAs concentrated in the IL phase. Distillation facilitated the separate recovery of PUFAs and alkane compounds, enabling classified ester applications and graded PUFA utilization; PUFA content in glycerides increased to 83.79%. Notably, the IL-TLPS intermediate phase, functioning as a liquid immobilized enzyme, retained over 90% catalytic activity across multiple cycles, demonstrating exceptional reusability. This study thus establishes a novel, efficient, and selective methodology for microalgal oil resource utilization.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"36 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Carbonic Anhydrase as a Sustainable Sealing Agent for Concrete Exposed to Chloride Attack","authors":"Pardis Pourhaji, Nima Rahbar","doi":"10.1021/acssuschemeng.5c01165","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c01165","url":null,"abstract":"Concrete, the most used engineering material in the world, is responsible for 8% of the entire CO<sub>2</sub> emission; 80% of the failures in reinforced concrete structures are related to the corrosion of embedded reinforcement. Concrete resistivity against chloride penetration is a pivotal parameter in determining the durability of reinforced concrete structures. Self-sealing concrete has recently emerged as a powerful method for enhancing this resistance. This paper investigates the effect of carbonic anhydrase (CA) as a sealing agent on the chloride penetration of concrete by the rapid chloride penetration test (RCPT). Concrete disk specimens without CA and with two different dosages of CA were cast and cured for 14 and 28 days. Chloride penetration depths and migration coefficients were evaluated for uncracked specimens at 14 and 28 days. The lower dosage of CA was used to prepare cracked and sealed specimens. The chloride content was quantified, and service life was predicted for specimens at 28 days. In uncracked concrete, a lower dosage of CA can considerably increase concrete resistivity to chloride penetration up to 46% compared to the control specimens. Although the presence of a crack increased chloride penetration through the crack, sealing the crack showed penetration depth at the crack zone similar to the uncracked concrete. Hence, using CA enzyme as a sealing agent extends the service life of uncracked concrete and recovers the cracked concrete’s service life after sealing. Thus, the addition of enzymes will have significant implications for infrastructure sustainability and reduction of CO<sub>2</sub> emissions related to the second industrial emitter.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Karol Juchniewicz, Izabela S. Pieta, Bogusław Mierzwa, Marcin Pisarek, Ravishankar G. Kadam, Olena Mozgova, Marcin Holdynski, Artur Malolepszy, Andrzej Borodzinski* and Piotr Pieta*,
{"title":"","authors":"Karol Juchniewicz, Izabela S. Pieta, Bogusław Mierzwa, Marcin Pisarek, Ravishankar G. Kadam, Olena Mozgova, Marcin Holdynski, Artur Malolepszy, Andrzej Borodzinski* and Piotr Pieta*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 25","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":7.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acssuschemeng.5c02346","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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