Ecotoxicity of canola and tallow biodiesel blends to selected soil organisms

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Proceedings titleProceedings of the 35th AMOP Technical Seminar on Environmental Contamination and Response
Conference35th AMOP Technical Seminar on Environmental Contamination and Response, 5 June 2012 through 7 June 2012, Vancouver, BC
Pages112; # of pages: 12
SubjectAccidental release; Advanced fuels; Aquatic toxicity; Biodiesel blends; Dehydrogenase activity; Deleterious effects; Direct contact; Dry soil; Earthworm Eisenia fetida; Ecotoxicity; Energy research and development; Environmental concerns; Fossil fuel resources; Lolium perenne; n-Alkanes; Petroleum diesel; Seedling emergence; Soil organisms; Toxicity assays; Toxicity test; Contamination; Fossil fuels; Paraffins; Soils; Sulfur; Technical presentations; Toxicity; Biodiesel
AbstractIn view of depleting fossil fuel resources and environmental concern, biodiesel couldpotentially replace petroleum-derived diesel. Aquatic toxicity of diesel and biodiesel has beenextensively studied over the past decades but little is still known about their toxicity in soilenvironment. The scope of this study was to evaluate the environmental impact of biodiesel,biodiesel blends and petroleum diesel in soil using direct contact toxicity assays. The selectedbiodiesels included canola-source biodiesel (B100 and B20). and tallow-source biodiesel (B100and B20), which were compared to petroleum ultra-low-sulfur based diesel (ULSD). Selectedstandard terrestrial toxicity tests included ryegrass Lolium perenne seedling emergence andgrowth, earthworm Eisenia fetida survival, and soil microbial dehydrogenase activity. Soilcharacterization included the quantification of total extractable materials (corresponding to the n-alkane range of C10-C34). Preliminary results indicate that: 1) canola and tallow B20 biodieselblends were less toxic to earthworm than ULSD; 2) canola and tallow B20 blends had similartoxic effects to ryegrass as ULSD; and 3) petroleum ULSD inhibited the DHA activity at allconcentrations tested, and B20 canola biodiesel had a deleterious effect on the DHA activity atthe lowest nominal loadings tested (1 and 10 ml/kg dry soil). Therefore, this study providesuseful toxicological data for the evaluation of potential adverse impact of biodiesel in theenvironment, such as an accidental release or spill. This project was funded by EnvironmentCanada and Natural Resources Canada and is part of the Advanced Fuels and Technologies forEmissions Reduction (AFTER) Program for energy research and development (PERD).
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Biotechnology Research Institute (BRI-IRB)
Peer reviewedYes
NPARC number21269155
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Record identifier01e96db9-3722-4cec-96ba-8b2e47dd7b72
Record created2013-12-12
Record modified2016-05-09
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