Damage to DNA of effective microorganisms by heavy metals: Impact on wastewater treatment
Abstract
The research is to test the damage to DNA of effective microorganisms (EMs) by heavy metal ions As3+, Cd2+, Cr3+, Cu2+, Hg2+, Pb2+, and Zn2+, as well as the effects of EM bacteria on wastewater treatment capability when their DNA is damaged. The approach applied in this study is to test with COMET assay the damage of EM DNA in wastewater with different concentrations of heavy metal ions As3+, Cd2+, Cr3+, Cu2+, Hg2+, Pb2+, Zn2+, as well as the effects of EM treated with As3+, Cd2+, Cr3+, CU2+, Hg2+, Pb2+, and Zn2+ on COD degrading capability in wastewater. The results showed that the damage of the DNA of EM were negatively correlated with their treatment capability and that EM bacteria maximum tolerant concentrations of these heavy metal ions was at 0.05 mg/L for As3+, 0.2 mg/L for Hg2+, 0.5 mg/L for Cd2+, Cr3+, and Cu2+, and 1 mg/L for Pb2+ and Zn2+.
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Maximum tolerant concentrations of heavy metals to EM are 0.2 mg/L for Hg2+, 1 mg/L for Pb2+ and Zn2+, 0.05 mg/L for As3+, and 0.5 mg/L for Cd2+, Cr3+, and Cu2+.
“Additionally, the maximum tolerant concentrations of these metals to the EM were found to be 0.2 mg/L for Hg 2+ , 1 mg/L for Pb 2+ and Zn 2+ , 0.05 mg/L for As 3+ , and 0.5 mg/L for Cd 2+ , Cr 3+ , and Cu 2+ [49].”
From Environmental applications of Effective Microorganisms: a review of current knowledge and recommendations for future directions (2021) · cites this paper as [49]
There is a negative correlation between damage to EM DNA by heavy metal ions and EM capability to treat wastewater.
“The study found a negative correlation between the damage of the DNA of the EM and their capability to treat the wastewater.”
From Environmental applications of Effective Microorganisms: a review of current knowledge and recommendations for future directions (2021) · cites this paper as [49]
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- Authors
- ZHOU, S., WEI, C., LIAO, C., & WU, H.
- Affiliations
- Yulin Normal University (CN)
- South China University of Technology (CN)
- Corresponding author
- WEI, Chaohai
- Venue
- Journal of Environmental Sciences
- Publisher
- Elsevier BV
- Published
- 2008-01
- Volume
- 20
- Issue
- 12
- Pages
- 1514-1518
- ISSN
- 1001-0742 (ISSN-L)
- OpenAlex
- W2070571782
- Cited by
- 55
- References
- 24
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 7 · 2023: 5 · 2022: 4 · 2021: 4 · 2020: 2 · 2019: 3 · 2018: 4 · 2017: 4 · 2016: 2 · 2015: 1 · 2014: 7 · 2013: 4
- FWCI
- 1.38
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Environmental Sciences (publishedVersion)
- PubMed (publishedVersion)
- Funders
- South China University of Technology
- Guangdong Academy of Agricultural Sciences
- Guangdong Academy of Sciences
- Topics
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
- Physical Sciences › Environmental Science › Water Science and Technology › Heavy Metal Pollution Remediation
- Physical Sciences › Environmental Science › Pollution › Microbial bioremediation and biosurfactants
- Keywords
- effective microorganisms, heavy metal toxicity, DNA damage, wastewater treatment, COD degradation, arsenic, cadmium, chromium, mercury, lead, zinc, copper, heavy metal tolerance, microbial bioremediation
- MeSH terms
- Bacteria, DNA Damage, DNA, Bacterial, Water Pollutants, Chemical, Colony Count, Microbial, Metals, Heavy, Comet Assay
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