Nitrification/denitrification shaped the mercury-oxidizing microbial community for simultaneous Hg0 and NO removal

Huang, Zhenshan; Wei, Zaishan; Xiao, Xiaoliang; Tang, Meiru; Li, Bolong; Xiao, Zhang

doi:10.1016/j.biortech.2018.11.069

Cited by 60 publications

(14 citation statements)

References 44 publications

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“…One of the important features of Rhodanobacter species is the capability of complete denitrification ( 1 ). In addition, Rhodanobacter species have been shown to be metal resistant ( 6 ). Rhodanobacter species dominance has been observed in the most metal-contaminated aquifers and the acidic source zone areas at the U.S. Department of Energy’s Oak Ridge Reservation (ORR) site ( 7 ).…”

Section: Introductionmentioning

confidence: 99%

Genomic Features and Pervasive Negative Selection in Rhodanobacter Strains Isolated from Nitrate and Heavy Metal Contaminated Aquifer

et al. 2022

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Despite the dominance of Rhodanobacter species in the subsurface of the contaminated Oak Ridge Reservation (ORR) site, very little is known about the mechanisms underlying their adaptions to the various stressors present at ORR. Recently, multiple Rhodanobacter strains have been isolated from the ORR groundwater samples from several wells with varying geochemical properties.

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Section: Introductionmentioning

confidence: 99%

Genomic Features and Pervasive Negative Selection in Rhodanobacter Strains Isolated from Nitrate and Heavy Metal Contaminated Aquifer

et al. 2022

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“…Besides, Geothrix fermentans H5, Shewanella oneidensis MR-1, Desulfovibrio desulfuricans ND132, and Cupriavidus metallidurans AE104 have proven capable of Hg 0 bio-oxidation. , A sulfur-oxidizing biotrickling filter achieved Hg 0 bioremoval by Hg 0 bio-oxidation . Our previous studies confirmed that nitrifying/denitrifying bacteria can perform Hg 0 bio-oxidation, − but chemical forms of Hg 2+ are yet to be clarified. On the basis of these, it is well worth investigating whether SRB can biologically oxidize Hg 0 to Hg 2+ , subsequently further convert Hg 2+ and biogenic sulfides into HgS and finally achieve bioconversion of Hg 0 into HgS.…”

Section: Introductionmentioning

confidence: 78%

Bio-oxidation of Elemental Mercury into Mercury Sulfide and Humic Acid-Bound Mercury by Sulfate Reduction for Hg⁰ Removal in Flue Gas

Huang

Wei

Xiao

et al. 2019

Environ. Sci. Technol.

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Bioconversion of elemental mercury (Hg0) into immobile, nontoxic, and less bioavailable species is of vital environmental significance. Here, we investigated bioconversion of Hg0 in a sulfate-reducing membrane biofilm reactor (MBfR). The MBfR achieved effective Hg0 removal by sulfate bioreduction. 16 S rDNA sequencing and metagenomic sequencing revealed that diverse groups of mercury-oxidizing/sulfate-reducing bacteria (Desulfobulbus, Desulfuromonas, Desulfomicrobium, etc.) utilized Hg0 as the initial electron donor and sulfate as the terminal electron acceptor to form the overall redox. These microorganisms coupled Hg0 bio-oxidation to sulfate bioreduction. Analysis on mercury speciation in biofilm by sequential extraction processes (SEPs) and inductively coupled mass spectrometry (ICP-MS) and by mercury temperature programmed desorption (Hg-TPD) showed that mercury sulfide (HgS) and humic acid-bound mercury (HA-Hg) were two major products of Hg0 bio-oxidation. With HgS and HA-Hg comprehensively characterized by X-ray diffraction (XRD), excitation-emission matrix spectra (EEM), scanning electron microscopy-energy disperse spectroscopy (SEM-EDS), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR), it was proposed that biologically oxidized mercury (Hg2+) further reacted with biogenic sulfides to form cubically crystallized metacinnabar (β-HgS) extracellular particles. Hg2+ was also complexed with functional groups −SH, −OH, −NH–, and −COO– in humic acids from extracellular polymeric substances (EPS) to form HA-Hg. HA-Hg may further react with biogenic sulfides to form HgS. Bioconversion of Hg0 into HgS was therefore achieved and can be a feasible biotechnique for flue gas demercuration.

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“…It is commonly used in experiments of various scales and in actual sewage treatment. Nitrifying/denitrifying Proteobacteria and Bacteroidetes play an important role in nitrification (Ding et al, 2019; Huang et al, 2019). Heterotrophic nitrifying Firmicutes can produce extracellular enzymes that could facilitate the hydrolyzation and utilization of solid biopolymers (Chen et al, 2018; Vijay et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Treatment of municipal wastewater by employing membrane bioreactors combined with efficient nitration microbial communities isolated by Isolation Chip with Plate Streaking technology

Zhang

Fang

et al. 2021

Water Environment Research

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In this research, we developed a method so‐called Isolation Chip with Plate Streaking (ICPS) to selectively enrich nitrifying microbial consortium for treating municipal wastewater. In batch experiment, these bacterial communities were able to remove NH3‐N in 72 h with an efficiency of 96%. Firmicutes, Bacteroidetes, and Proteobacteria species are dominant bacteria in these communities. When the bacterial communities were used in the membrane bioreactor under typical condition, the removal efficiency was 81.0%. In contrast, under the actual wastewater condition, the efficiency could reach 91.2%. All above results showed clearly that the consortium selected by our ICPS method could achieve high‐efficient NH3‐N removal, thus offering a reliable technique for screening functional microorganisms in the field of water treatment. Practitioner points ICPS technology was designed and used for screening specialized NH3‐N‐removing isolates. The screening process benefited the growth of the dominant nitrifying bacteria Firmicutes and Bacteroidetes. When the functional bacteria applied into the MBR, the NH3‐N removal efficiency was 91.2% under actual wastewater conditions.

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Nitrification/denitrification shaped the mercury-oxidizing microbial community for simultaneous Hg0 and NO removal

Cited by 60 publications

References 44 publications

Genomic Features and Pervasive Negative Selection in Rhodanobacter Strains Isolated from Nitrate and Heavy Metal Contaminated Aquifer

Genomic Features and Pervasive Negative Selection in Rhodanobacter Strains Isolated from Nitrate and Heavy Metal Contaminated Aquifer

Bio-oxidation of Elemental Mercury into Mercury Sulfide and Humic Acid-Bound Mercury by Sulfate Reduction for Hg⁰ Removal in Flue Gas

Treatment of municipal wastewater by employing membrane bioreactors combined with efficient nitration microbial communities isolated by Isolation Chip with Plate Streaking technology

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Nitrification/denitrification shaped the mercury-oxidizing microbial community for simultaneous Hg0 and NO removal

Cited by 60 publications

References 44 publications

Genomic Features and Pervasive Negative Selection in Rhodanobacter Strains Isolated from Nitrate and Heavy Metal Contaminated Aquifer

Genomic Features and Pervasive Negative Selection in Rhodanobacter Strains Isolated from Nitrate and Heavy Metal Contaminated Aquifer

Bio-oxidation of Elemental Mercury into Mercury Sulfide and Humic Acid-Bound Mercury by Sulfate Reduction for Hg0 Removal in Flue Gas

Treatment of municipal wastewater by employing membrane bioreactors combined with efficient nitration microbial communities isolated by Isolation Chip with Plate Streaking technology

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Bio-oxidation of Elemental Mercury into Mercury Sulfide and Humic Acid-Bound Mercury by Sulfate Reduction for Hg⁰ Removal in Flue Gas