The Allium cepa bioassay to evaluate landfarming soil, before and after the addition of rice hulls to accelerate organic pollutants biodegradation

Landfarming is a soil bioremediation technology practiced by oil refineries in order to reduce or eliminate hydrocarbons from petroleum sludge. The goal of the current study was to use Allium cepa bioassay to assess landfarming and landfarming with rice hulls amendment before and after hydrocarbons...

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Bibliographic Details
Published in:Ecotoxicology and environmental safety 2009-07, Vol.72 (5), p.1363-1368
Main Authors: Souza, T.S., Hencklein, F.A., Angelis, D.F., Gonçalves, R.A., Fontanetti, C.S.
Format: Article
Language:English
Subjects:
Allium cepa
Biodegradation, Environmental
Biological Assay
Bioremediation
Carbon Dioxide - metabolism
Cell Nucleus - drug effects
Chromosome Aberrations - chemically induced
Chromosomes, Plant - drug effects
Environmental Monitoring - methods
Genotoxicity tests
Industrial Waste
Meristem - drug effects
Micronuclei, Chromosome-Defective - chemically induced
Mitosis - drug effects
Mutagenicity Tests
Oil refinery
Onions - drug effects
Onions - genetics
Onions - growth & development
Oryza - microbiology
Oryza sativa
Petroleum - metabolism
Petroleum - toxicity
Petroleum sludge
Seeds - drug effects
Soil - analysis
Soil Pollutants - metabolism
Soil Pollutants - toxicity
Time Factors
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Summary:Landfarming is a soil bioremediation technology practiced by oil refineries in order to reduce or eliminate hydrocarbons from petroleum sludge. The goal of the current study was to use Allium cepa bioassay to assess landfarming and landfarming with rice hulls amendment before and after hydrocarbons biodegradation assay in the laboratory. Three cytogenetic endpoints were used: mitotic and chromosome abnormalities (MCA), micronucleus (MN) and nuclear buds (NB). Landfarming presented 13.5 g/kg of total petroleum hydrocarbons (TPHs) and caused strong clastogenic and mutagenic effects ( p0.05). Our findings showed that the use of rice hulls accelerated the biodegradation efficacy of landfarming and reduced their clastogenicity, indicating that supplementary treatments are important to improve the efficiency of bioremediation processes.
ISSN:0147-6513
1090-2414
DOI:10.1016/j.ecoenv.2009.01.009