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Wang J, Hong Y, Lin Z, Zhu C, Da J, Chen G, Jiang F. A novel biological sulfur reduction process for mercury-contaminated wastewater treatment. WATER RESEARCH 2019; 160:288-295. [PMID: 31154126 DOI: 10.1016/j.watres.2019.05.066] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 05/19/2019] [Accepted: 05/20/2019] [Indexed: 05/25/2023]
Abstract
The sulfidogenic process driven by sulfate-reducing bacteria (SRB) is not suitable for mercury-contaminated wastewater treatment due to the highly toxic methyl-mercury (MeHg) produced by SRB. In our previous study, we observed in short-term batch tests that sulfur-reducing bacteria (S0RB) could remove mercury ions without MeHg production. Thus, the aim of this study is to develop a biological sulfur reduction process driven by S0RB for mercury-contaminated wastewater, and investigate its long-term performance on mercury removal and MeHg accumulation. Receiving mercury-contaminated wastewater containing 0-50 mg Hg(II)/L for 326 days, S0RB in the sulfur-reducing bioreactor showed high tolerance with mercury toxicity, and removed 99.4% ± 1.4% of the influent Hg(II) by biogenic sulfide. MeHg was always found to be undetectable in the bioreactor, even though the sulfidogenic bacteria were exposed to high levels of Hg(II) in long-term trials. The result of qPCR analysis further revealed that the mercury-methylation functional gene (hgcA) concentration in the bioreactor sludge was found to be extremely lower than in the SRB-enriched sludge, Geobacter sulfurreducens PCA and Desulfomicrobium baculatum DSM 4028, implying that there was no or few mercury methylators in the bioreactor. In short, the biological sulfur reduction process using S0RB can efficiently treat mercury-contaminated wastewater, with high Hg(II) removal efficiency and no MeHg accumulation.
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Affiliation(s)
- Jinting Wang
- Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yaowu Hong
- MOE Laboratory of Theoretical Chemistry of Environment, School of Chemistry & Environment, South China Normal University, Guangzhou, China
| | - Zichao Lin
- MOE Laboratory of Theoretical Chemistry of Environment, School of Chemistry & Environment, South China Normal University, Guangzhou, China
| | - Chulian Zhu
- MOE Laboratory of Theoretical Chemistry of Environment, School of Chemistry & Environment, South China Normal University, Guangzhou, China
| | - Ji Da
- Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Guanghao Chen
- Department of Civil and Environmental Engineering, Water Technology Center, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China.
| | - Feng Jiang
- MOE Laboratory of Theoretical Chemistry of Environment, School of Chemistry & Environment, South China Normal University, Guangzhou, China; School of Environmental Science & Engineering, Sun Yat-sen University, Guangzhou, China.
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Chen CT, Liao YY, Salunke SB, Lin YH, Kuo TS. Directed Self-Assembly of C 4-Symmetric, Oxidovanadate-Centered, Vanadyl(V) Quadruplexes for Ba 2+- and Hg 2+-Specific Recognition, Transport, and Recovery. Inorg Chem 2018; 57:11511-11523. [PMID: 30183263 DOI: 10.1021/acs.inorgchem.8b01454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Directed assembly of loosely, Na+-bound, oxidovanadate-centered quartets of C4-symmetry from tailor-made chiral N-salicylidene-vanadyl(V) complexes, for the first time, allows for highly efficient Ba2+- or Hg2+-specific detection (by 51V NMR and VCD), transport (forming a unique helical capsule or a capped square planar complex, respectively), and green recovery from an aqueous phase containing 4 different alkaline earth ions or from at least 10 different metal ions of similar size and charge capacity into the CHCl3 layer without interference from oxa- or oxophilic ions like Mg2+, Ca2+, Cu2+, Cd2+, and Pb2+.
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Affiliation(s)
- Chien-Tien Chen
- Department of Chemistry , National Tsing Hua University , Hsinchu , Taiwan
| | - Yi-Ya Liao
- Department of Chemistry , National Tsing Hua University , Hsinchu , Taiwan
| | | | - Ya-Hui Lin
- National Taiwan Normal University , Taipei , Taiwan
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Krishna Kumar AS, Kalidhasan S, Rajesh V, Rajesh N. Adsorptive Demercuration by Virtue of an Appealing Interaction Involving Biopolymer Cellulose and Mercaptobenzothiazole. Ind Eng Chem Res 2013. [DOI: 10.1021/ie400921p] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Santhana Krishna Kumar
- Department of Chemistry, ‡Department of Biological
Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar,
Shameerpet Mandal, R.R. Dist-500 078(AP), India
| | - S. Kalidhasan
- Department of Chemistry, ‡Department of Biological
Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar,
Shameerpet Mandal, R.R. Dist-500 078(AP), India
| | - Vidya Rajesh
- Department of Chemistry, ‡Department of Biological
Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar,
Shameerpet Mandal, R.R. Dist-500 078(AP), India
| | - N. Rajesh
- Department of Chemistry, ‡Department of Biological
Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar,
Shameerpet Mandal, R.R. Dist-500 078(AP), India
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