Application of a Redox Gradostat Reactor for Assessing Rhizosphere Microorganism Activity on Lambda-Cyhalothrin

Bacterial activity on pesticides can lead to decreased toxicity or persistence in aquatic systems. Rhizosphere activity is difficult to measure in situ. To mimic rhizosphere properties of the soft rush, Juncus effusus , a single-stage gradostat reactor was developed to study cycling of lambda-cyhalo...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2014-03, Vol.92 (3), p.347-351
Main Authors: Peacock, T. J., Mikell, A. T., Moore, M. T., Smith, S.
Format: Article
Language:English
Subjects:
Aquatic environment
Aquatic plants
Aquatic Pollution
bacteria
biodegradation
Biodegradation of pollutants
Biological and medical sciences
bioreactors
Bioreactors - microbiology
Biotechnology
citrates
Earth and Environmental Science
Ecotoxicology
Environment
Environment and pollution
Environmental Chemistry
Environmental Health
Ferric Compounds - analysis
Ferric Compounds - metabolism
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Insecticides
Iron
Juncus effusus
lambda-cyhalothrin
Magnoliopsida
Miscellaneous
Nitriles - analysis
Nitriles - metabolism
Oxidation-Reduction
pesticidal properties
Pesticides
Pesticides - analysis
Pesticides - metabolism
Pollution
Pyrethrins - analysis
Pyrethrins - metabolism
Reactors
Rhizosphere
Soil - chemistry
Soil Microbiology
Soil microorganisms
Soil Pollutants - analysis
Soil Pollutants - metabolism
Soil Science & Conservation
Toxicity
Waste Water Technology
Water Management
Water Microbiology
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - metabolism
Water Pollution Control
wetland soils
Wetlands
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Summary:Bacterial activity on pesticides can lead to decreased toxicity or persistence in aquatic systems. Rhizosphere activity is difficult to measure in situ. To mimic rhizosphere properties of the soft rush, Juncus effusus , a single-stage gradostat reactor was developed to study cycling of lambda-cyhalothrin by rhizobacteria and the effects of Fe(III) and citrate, both common in wetland soil, on lambda-cyhalothrin degradation. Redox gradient changes, greater than ±10 mV, were apparent within days 5–15 both in the presence and absence of ferric citrate. Through the production of a redox gradient ( p  
ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-014-1202-0