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Aquatic Bacteria Rheinheimera tangshanensis New Ability for Mercury Pollution Removal
To explore the strong tolerance of bacteria to Hg pollution, aquatic Rheinheimera tangshanensis (RTS-4) was separated from industrial sewage, with a maximum Hg(II) tolerant concentration of 120 mg/L and a maximum Hg(II) removal rate of 86.72 ± 2.11%, in 48 h under optimum culture conditions. The Hg(...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10003538/ https://www.ncbi.nlm.nih.gov/pubmed/36902440 http://dx.doi.org/10.3390/ijms24055009 |
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author | Zhao, Mengmeng Zheng, Gege Kang, Xiuyun Zhang, Xiaoyan Guo, Junming Wang, Shaomei Chen, Yiping Xue, Lingui |
author_facet | Zhao, Mengmeng Zheng, Gege Kang, Xiuyun Zhang, Xiaoyan Guo, Junming Wang, Shaomei Chen, Yiping Xue, Lingui |
author_sort | Zhao, Mengmeng |
collection | PubMed |
description | To explore the strong tolerance of bacteria to Hg pollution, aquatic Rheinheimera tangshanensis (RTS-4) was separated from industrial sewage, with a maximum Hg(II) tolerant concentration of 120 mg/L and a maximum Hg(II) removal rate of 86.72 ± 2.11%, in 48 h under optimum culture conditions. The Hg(II) bioremediation mechanisms of RTS-4 bacteria are as follows: (1) the reduction of Hg(II) through Hg reductase encoded by the mer operon; (2) the adsorption of Hg(II) through the production of extracellular polymeric substances (EPSs); and (3) the adsorption of Hg(II) using dead bacterial biomass (DBB). At low concentrations [Hg(II) ≤ 10 mg/L], RTS-4 bacteria employed Hg(II) reduction and DBB adsorption to remove Hg(II), and the removal percentages were 54.57 ± 0.36% and 45.43 ± 0.19% of the total removal efficiency, respectively. At moderate concentrations [10 mg/L < Hg(II) ≤ 50 mg/L], all three mechanisms listed above coexisted, with the percentages being 0.26 ± 0.01%, 81.70 ± 2.31%, and 18.04 ± 0.62% of the total removal rate, respectively. At high concentrations [Hg(II) > 50 mg/L], the bacteria primary employed EPS and DBB adsorption to remove Hg(II), where the percentages were 19.09 ± 0.04% and 80.91 ± 2.41% of the total removal rate, respectively. When all three mechanisms coexisted, the reduction of Hg(II) occurred within 8 h, the adsorption of Hg(II) by EPSs and DBB occurred within 8–20 h and after 20 h, respectively. This study provides an efficient and unused bacterium for the biological treatment of Hg pollution. |
format | Online Article Text |
id | pubmed-10003538 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-100035382023-03-11 Aquatic Bacteria Rheinheimera tangshanensis New Ability for Mercury Pollution Removal Zhao, Mengmeng Zheng, Gege Kang, Xiuyun Zhang, Xiaoyan Guo, Junming Wang, Shaomei Chen, Yiping Xue, Lingui Int J Mol Sci Article To explore the strong tolerance of bacteria to Hg pollution, aquatic Rheinheimera tangshanensis (RTS-4) was separated from industrial sewage, with a maximum Hg(II) tolerant concentration of 120 mg/L and a maximum Hg(II) removal rate of 86.72 ± 2.11%, in 48 h under optimum culture conditions. The Hg(II) bioremediation mechanisms of RTS-4 bacteria are as follows: (1) the reduction of Hg(II) through Hg reductase encoded by the mer operon; (2) the adsorption of Hg(II) through the production of extracellular polymeric substances (EPSs); and (3) the adsorption of Hg(II) using dead bacterial biomass (DBB). At low concentrations [Hg(II) ≤ 10 mg/L], RTS-4 bacteria employed Hg(II) reduction and DBB adsorption to remove Hg(II), and the removal percentages were 54.57 ± 0.36% and 45.43 ± 0.19% of the total removal efficiency, respectively. At moderate concentrations [10 mg/L < Hg(II) ≤ 50 mg/L], all three mechanisms listed above coexisted, with the percentages being 0.26 ± 0.01%, 81.70 ± 2.31%, and 18.04 ± 0.62% of the total removal rate, respectively. At high concentrations [Hg(II) > 50 mg/L], the bacteria primary employed EPS and DBB adsorption to remove Hg(II), where the percentages were 19.09 ± 0.04% and 80.91 ± 2.41% of the total removal rate, respectively. When all three mechanisms coexisted, the reduction of Hg(II) occurred within 8 h, the adsorption of Hg(II) by EPSs and DBB occurred within 8–20 h and after 20 h, respectively. This study provides an efficient and unused bacterium for the biological treatment of Hg pollution. MDPI 2023-03-05 /pmc/articles/PMC10003538/ /pubmed/36902440 http://dx.doi.org/10.3390/ijms24055009 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zhao, Mengmeng Zheng, Gege Kang, Xiuyun Zhang, Xiaoyan Guo, Junming Wang, Shaomei Chen, Yiping Xue, Lingui Aquatic Bacteria Rheinheimera tangshanensis New Ability for Mercury Pollution Removal |
title | Aquatic Bacteria Rheinheimera tangshanensis New Ability for Mercury Pollution Removal |
title_full | Aquatic Bacteria Rheinheimera tangshanensis New Ability for Mercury Pollution Removal |
title_fullStr | Aquatic Bacteria Rheinheimera tangshanensis New Ability for Mercury Pollution Removal |
title_full_unstemmed | Aquatic Bacteria Rheinheimera tangshanensis New Ability for Mercury Pollution Removal |
title_short | Aquatic Bacteria Rheinheimera tangshanensis New Ability for Mercury Pollution Removal |
title_sort | aquatic bacteria rheinheimera tangshanensis new ability for mercury pollution removal |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10003538/ https://www.ncbi.nlm.nih.gov/pubmed/36902440 http://dx.doi.org/10.3390/ijms24055009 |
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