{"title":"核黄素衍生物作为一种新型电子传递介质,可提高一龄单胞菌 MR-1 对六价铬的去除率","authors":"Liwen Zhang, Luyao Xi, Shuyu He, Huizi Wen, Shanyi Tan, Shaohua Chen","doi":"10.1016/j.ibiod.2024.105892","DOIUrl":null,"url":null,"abstract":"<div><p>Bioremediation has garnered considerable interest due to its advantages of economy and no secondary pollution. However, the direct electron transfer rate between microorganisms and Cr(VI) is low. The bioreduction of Cr(VI) by Shewanella oneidensis MR-1 (<em>S. oneidensis</em>) in the presence of formylmethylflavin (FMF) was conducted to understand how FMF mediated the extracellular electron transfer process to improve Cr(VI) removal. In this study, FMF was firstly synthesized by modifing RF to increase its solubility and redox activity. The findings indicate that <em>S. oneidensis</em>/FMF exhibited better Cr(VI) removal performance compared to that of <em>S. oneidensis</em>. Under optimum conditions, 40 mg/L Cr(VI) could be completely removed by <em>S. oneidensis</em>/FMF within 120 h, while only 48.6% of Cr(VI) was removed by <em>S. oneidensis</em>, and the first order rate constant (k) for the Cr(VI) elimination by <em>S. oneidensis</em>/FMF (0.033 h<sup>−1</sup>) was about 4.1-fold greater than that of <em>S. oneidensis</em> (0.008 h<sup>−1</sup>). Moreover, the removal of Cr(VI) by <em>S. oneidensis</em>/FMF were dominated by reduction, and supplemented by adsorption and complexation. FMF enhance the extracellular electron transfer rate (EETR) was confirmed by electrochemical cyclic voltammetry (CV) and linear scanning voltammetry (LSV) experiments. This study emphasizes the potential important role of FMF in environmental bioremediation.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"195 ","pages":"Article 105892"},"PeriodicalIF":4.1000,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Riboflavin derivatives as a novel electron transfer mediator for enhancing Cr(VI) removal by Shewanella oneidensis MR-1\",\"authors\":\"Liwen Zhang, Luyao Xi, Shuyu He, Huizi Wen, Shanyi Tan, Shaohua Chen\",\"doi\":\"10.1016/j.ibiod.2024.105892\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Bioremediation has garnered considerable interest due to its advantages of economy and no secondary pollution. However, the direct electron transfer rate between microorganisms and Cr(VI) is low. The bioreduction of Cr(VI) by Shewanella oneidensis MR-1 (<em>S. oneidensis</em>) in the presence of formylmethylflavin (FMF) was conducted to understand how FMF mediated the extracellular electron transfer process to improve Cr(VI) removal. In this study, FMF was firstly synthesized by modifing RF to increase its solubility and redox activity. The findings indicate that <em>S. oneidensis</em>/FMF exhibited better Cr(VI) removal performance compared to that of <em>S. oneidensis</em>. Under optimum conditions, 40 mg/L Cr(VI) could be completely removed by <em>S. oneidensis</em>/FMF within 120 h, while only 48.6% of Cr(VI) was removed by <em>S. oneidensis</em>, and the first order rate constant (k) for the Cr(VI) elimination by <em>S. oneidensis</em>/FMF (0.033 h<sup>−1</sup>) was about 4.1-fold greater than that of <em>S. oneidensis</em> (0.008 h<sup>−1</sup>). Moreover, the removal of Cr(VI) by <em>S. oneidensis</em>/FMF were dominated by reduction, and supplemented by adsorption and complexation. FMF enhance the extracellular electron transfer rate (EETR) was confirmed by electrochemical cyclic voltammetry (CV) and linear scanning voltammetry (LSV) experiments. This study emphasizes the potential important role of FMF in environmental bioremediation.</p></div>\",\"PeriodicalId\":13643,\"journal\":{\"name\":\"International Biodeterioration & Biodegradation\",\"volume\":\"195 \",\"pages\":\"Article 105892\"},\"PeriodicalIF\":4.1000,\"publicationDate\":\"2024-08-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Biodeterioration & Biodegradation\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S096483052400163X\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"BIOTECHNOLOGY & APPLIED MICROBIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Biodeterioration & Biodegradation","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S096483052400163X","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
Riboflavin derivatives as a novel electron transfer mediator for enhancing Cr(VI) removal by Shewanella oneidensis MR-1
Bioremediation has garnered considerable interest due to its advantages of economy and no secondary pollution. However, the direct electron transfer rate between microorganisms and Cr(VI) is low. The bioreduction of Cr(VI) by Shewanella oneidensis MR-1 (S. oneidensis) in the presence of formylmethylflavin (FMF) was conducted to understand how FMF mediated the extracellular electron transfer process to improve Cr(VI) removal. In this study, FMF was firstly synthesized by modifing RF to increase its solubility and redox activity. The findings indicate that S. oneidensis/FMF exhibited better Cr(VI) removal performance compared to that of S. oneidensis. Under optimum conditions, 40 mg/L Cr(VI) could be completely removed by S. oneidensis/FMF within 120 h, while only 48.6% of Cr(VI) was removed by S. oneidensis, and the first order rate constant (k) for the Cr(VI) elimination by S. oneidensis/FMF (0.033 h−1) was about 4.1-fold greater than that of S. oneidensis (0.008 h−1). Moreover, the removal of Cr(VI) by S. oneidensis/FMF were dominated by reduction, and supplemented by adsorption and complexation. FMF enhance the extracellular electron transfer rate (EETR) was confirmed by electrochemical cyclic voltammetry (CV) and linear scanning voltammetry (LSV) experiments. This study emphasizes the potential important role of FMF in environmental bioremediation.
期刊介绍:
International Biodeterioration and Biodegradation publishes original research papers and reviews on the biological causes of deterioration or degradation.