Enhanced reduction of sulfate and chromium under sulfate-reducing condition by synergism between extracellular polymeric substances and graphene oxide

Yan, Jia; Ye, Weizhuo; Liang, Xiao; Wang, Siji; Xie, Jiehui; Zhong, Kengqiang; Bao, Min; Yang, Jinbin; Wen, Huijun; Li, Shugeng; Chen, Yongheng; Gu, Ji‐Dong; Zhang, Hongguo

doi:10.1016/j.envres.2020.109157

Cited by 35 publications

(8 citation statements)

References 54 publications

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“…Among them, the polysaccharide in the EPS component could significantly promote the reduction of sulfate. It was consistent with the research results (Yan et al 2020 ).…”

Section: Resultssupporting

confidence: 93%

“…It was demonstrated that externally added EPS had greater photo-current intensity than that without EPS (Zhu et al 2018 ). Some components of extracellular EPS, especially polysaccharide, contributed to the separation of electrons from holes and thus might be mainly responsible for the enhanced electron utilization and increased sulfate reduction efficiency of C09 strain (Yan et al 2020 ). After the removal of EPS, CdS NPs cannot be adsorbed on the surface of C09 strain, so the electrons generated by CdS NPs could not be used by C09 strain to promote the reduction of sulfate and bacterial growth process.…”

Section: Resultsmentioning

confidence: 99%

“…The EPS of freeze-dried were mixed with KBr in a wave number range of 4000-500 cm −1 for FT-IR analysis. In order to compare the effects of EPS components on the instantaneous photo-current of CdS (1) Eg = 1240/ g, NPs, EPS was treated with protease (2.5 μL/mL, Proserpina K 10 mg/mL) and polysaccharase (10.0 μL/mL, pullulanase 1000 U/mL) (Yan et al 2020).…”

Section: Extracellular Polymeric Substances Extraction Purification A...mentioning

confidence: 99%

“…Then cysteine was used as an electron sacrificial agent, and the electrons combine with H + to form [H] for Moorella thermoacetica to reduce CO 2 to acetic acid (Gai et al 2020 ). Enhanced reduction efficiency of sulfate under sulfate-reducing condition was obtained by synergism between EPS and graphene oxide (Yan et al 2020 ). Therefore, the photosensitive nanomaterials could indeed provide energy for bacteria in the form of EET.…”

Section: Introductionmentioning

confidence: 99%

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Effects of cadmium sulfide nanoparticles on sulfate bioreduction and oxidative stress in Desulfovibrio desulfuricans

Cheng

Ding

Chen

et al. 2022

Bioresour. Bioprocess.

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Sulfate-containing wastewater has a serious threat to the environment and human health. Microbial technology has great potential for the treatment of sulfate-containing wastewater. It was found that nano-photocatalysts could be used as extracellular electron donors to promote the growth and metabolic activity of non-photosynthetic microorganisms. However, nano-photocatalysts could also induce oxidative stress and damage cells. Therefore, the interaction mechanism between photosynthetic nanocatalysts and non-photosynthetic microorganisms is crucial to determine the regulatory strategies for microbial wastewater treatment technologies. In this paper, the mechanism and regulation strategy of cadmium sulfide nanoparticles (CdS NPs) on the growth of sulfate-reducing bacteria and the sulfate reduction process were investigated. The results showed that the sulfate reduction efficiency could be increased by 6.4% through CdS NPs under light conditions. However, the growth of Desulfovibrio desulfuricans C09 was seriously inhibited by 55% due to the oxidative stress induced by CdS NPs on cells. The biomass and sulfate reduction efficiency could be enhanced by 6.8% and 5.9%, respectively, through external addition of humic acid (HA). At the same time, the mechanism of the CdS NPs strengthening the sulfate reduction process by sulfate bacteria was also studied which can provide important theoretical guidance and technical support for the development of microbial technology combined with extracellular electron transfer (EET) for the treatment of sulfate-containing wastewater. Graphical Abstract

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“…Among them, the polysaccharide in the EPS component could significantly promote the reduction of sulfate. It was consistent with the research results (Yan et al 2020 ).…”

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Extracellular Polymeric Substances Extraction Purification A...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of cadmium sulfide nanoparticles on sulfate bioreduction and oxidative stress in Desulfovibrio desulfuricans

Cheng

Ding

Chen

et al. 2022

Bioresour. Bioprocess.

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show abstract

“…Another cellular metabolite, pyrrole-2-carboxylic acid (C 5 H 5 NO 2 ), also accelerated the bioreduction process in presence of high Cr(VI) concentration by P. phragmitetus BB (Chai et al, 2019). Interestingly, the EPSs in a sulfur-reducing bacterium, Enterococcus avium strain BY7, were also reported to support as an electron carrier for Cr(VI) reduction, where different EPS components such as polysaccharides, proteins, and humic substances exhibited dissimilar electron transfer rates (Yan et al, 2020). Further, the self-assembly of strain BY7 on reduced graphene oxide (rGO) showed enhanced EPS production on bacterial surface for increased removal of Cr(VI).…”

Section: Electron Mediators (Or Electron Shuttles)mentioning

confidence: 99%

Chemical-Assisted Microbially Mediated Chromium (Cr) (VI) Reduction Under the Influence of Various Electron Donors, Redox Mediators, and Other Additives: An Outlook on Enhanced Cr(VI) Removal

Rahman

Thomas

2021

Front. Microbiol.

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Chromium (Cr) (VI) is a well-known toxin to all types of biological organisms. Over the past few decades, many investigators have employed numerous bioprocesses to neutralize the toxic effects of Cr(VI). One of the main process for its treatment is bioreduction into Cr(III). Key to this process is the ability of microbial enzymes, which facilitate the transfer of electrons into the high valence state of the metal that acts as an electron acceptor. Many underlying previous efforts have stressed on the use of different external organic and inorganic substances as electron donors to promote Cr(VI) reduction process by different microorganisms. The use of various redox mediators enabled electron transport facility for extracellular Cr(VI) reduction and accelerated the reaction. Also, many chemicals have employed diverse roles to improve the Cr(VI) reduction process in different microorganisms. The application of aforementioned materials at the contaminated systems has offered a variety of influence on Cr(VI) bioremediation by altering microbial community structures and functions and redox environment. The collective insights suggest that the knowledge of appropriate implementation of suitable nutrients can strongly inspire the Cr(VI) reduction rate and efficiency. However, a comprehensive information on such substances and their roles and biochemical pathways in different microorganisms remains elusive. In this regard, our review sheds light on the contributions of various chemicals as electron donors, redox mediators, cofactors, etc., on microbial Cr(VI) reduction for enhanced treatment practices.

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Chromium (VI) bioremoval from contaminated wastewater using Pseudomonas aeruginosa ATHA23 producing biofilm supported on clinoptilolite

Ataabadi

Hoodaji

Tahmourespour

2022

Environ Geochem Health

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Enhanced reduction of sulfate and chromium under sulfate-reducing condition by synergism between extracellular polymeric substances and graphene oxide

Cited by 35 publications

References 54 publications

Effects of cadmium sulfide nanoparticles on sulfate bioreduction and oxidative stress in Desulfovibrio desulfuricans

Effects of cadmium sulfide nanoparticles on sulfate bioreduction and oxidative stress in Desulfovibrio desulfuricans

Chemical-Assisted Microbially Mediated Chromium (Cr) (VI) Reduction Under the Influence of Various Electron Donors, Redox Mediators, and Other Additives: An Outlook on Enhanced Cr(VI) Removal

Chromium (VI) bioremoval from contaminated wastewater using Pseudomonas aeruginosa ATHA23 producing biofilm supported on clinoptilolite

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