The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.
Toxicity of fluoride to microorganisms in biological wastewater treatment systems
Abstract
Fluoride is a common contaminant in a variety of industrial wastewaters. Available information on the potential toxicity of fluoride to microorganisms implicated in biological wastewater treatment is very limited. The objective of this study was to evaluate the inhibitory effect of fluoride towards the main microbial populations responsible for the removal of organic constituents and nutrients in wastewater treatment processes. The results of short-term batch bioassays indicated that the toxicity of sodium fluoride varied widely depending on the microbial population. Anaerobic microorganisms involved in various metabolic steps of anaerobic digestion processes were found to be very sensitive to the presence of fluoride. The concentrations of fluoride causing 50% metabolic inhibition (IC(50)) of propionate- and butyrate-degrading microorganisms as well as mesophilic and thermophilic acetate-utilizing methanogens ranged from 18 to 43 mg/L. Fluoride was also inhibitory to nitrification, albeit at relatively high levels (IC(50)=149 mg/L). Nitrifying bacteria appeared to adapt rapidly to fluoride, and a near complete recovery of their metabolic activity was observed after only 4d of exposure to high fluoride levels (up to 500 mg/L). All other microbial populations evaluated in this study, i.e., glucose fermenters, aerobic glucose-degrading heterotrophs, denitrifying bacteria, and H(2)-utilizing methanogens, tolerated fluoride at very high concentrations (>500 mg/L).
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Metadata
- Authors
- Ochoa-Herrera, V., Banihani, Q., León, G., Khatri, C., Field, J. A., & Sierra-Alvarez, R.
- Affiliations
- University of Arizona (US)
- Venue
- Water Research
- Publisher
- Elsevier BV
- Published
- 2009-07
- Volume
- 43
- Issue
- 13
- Pages
- 3177-3186
- ISSN
- 0043-1354 (ISSN-L)
- OpenAlex
- W2123295237
- Cited by
- 135
- References
- 42
- Citations by year
- 2026: 10 · 2025: 16 · 2024: 7 · 2023: 11 · 2022: 13 · 2021: 12 · 2020: 8 · 2019: 9 · 2018: 6 · 2017: 4 · 2016: 10 · 2015: 4 · 2014: 6 · 2013: 5 · 2012: 3
- FWCI
- 4.33
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Water Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Semiconductor Research Corporation
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Fluoride Effects and Removal
- Physical Sciences › Environmental Science › Pollution › Wastewater Treatment and Nitrogen Removal
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Anaerobic Digestion and Biogas Production
- Keywords
- fluoride toxicity, sodium fluoride, biological wastewater treatment, microbial inhibition, anaerobic digestion, methanogenic archaea, nitrification, nitrifying bacteria, denitrifying bacteria, IC50, microbial adaptation
- MeSH terms
- Aerobiosis, Anaerobiosis, Bacteria, Butyrates, Fermentation, Fluorides, Glucose, Methane, Nitrogen, Organic Chemicals, Propionates, Sewage, Waste Disposal, Fluid, Water Pollutants, Chemical, Water Purification, Toxicity Tests, Heterotrophic Processes
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