Toxicity and Biodegradation in Sandy Soil Contaminated by Lubricant Oils

Lopes, Paulo Renato Matos; Montagnolli, Renato Nallin; Domingues, R.; Bidóia, Edério Dino

doi:10.1007/s00128-010-9945-8

Cited by 28 publications

(20 citation statements)

References 14 publications

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“…Germination tests using seeds of E. sativa and L. sativa were based on Lopes et al (12) and adjustments were performed in triplicate with 10 seeds in each replicate.…”

Section: Tamada Is E T a Lmentioning

confidence: 99%

Toxicological evaluation of vegetable oils and biodiesel in soil during the biodegradation process

Tamada¹,

Montagnolli²,

Lopes³

et al. 2012

Braz. J. Microbiol.

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Vegetable oils and their derivatives, like biodiesel, are used extensively throughout the world, thus posing an environmental risk when disposed. Toxicity testing using test organisms shows how these residues affect ecosystems. Toxicity tests using earthworms (Eisenia foetida) are widespread because they are a practical resource for analyzing terrestrial organisms. For phytotoxicological analysis, we used seeds of arugula zero days, 60 days, 120 days and 180 days. The studied contaminants were soybean oil (new and used) and biodiesel (B100). An evaluation of the germination of both seeds showed an increased toxicity for all contaminants as the biodegradation occurred, biodiesel being the most toxic among the contaminants. On the other hand, for the tests using earthworms, the biodiesel was the only contaminant that proved to be toxic. Therefore, the higher toxicity of the sample containing these hydrocarbons over time can be attributed to the secondary compounds formed by microbial action. Thus, we conclude that the biodegradation in soil of the studied compounds requires longer periods for the sample toxicity to be decreased with the action of microorganisms.

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“…Germination tests using seeds of E. sativa and L. sativa were based on Lopes et al (12) and adjustments were performed in triplicate with 10 seeds in each replicate.…”

Section: Tamada Is E T a Lmentioning

confidence: 99%

Toxicological evaluation of vegetable oils and biodiesel in soil during the biodegradation process

Tamada¹,

Montagnolli²,

Lopes³

et al. 2012

Braz. J. Microbiol.

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“…For this assay the methodology of Lopes (2010) was adapted, where 50 mL plastic containers were filled with 50 g of sandy soil moistened with 17.5 mL of solution (landfill leachate + deionized water), according to the same treatments applied in the direct impact test. Seeds were then sown where 10 (ten) cucumber seeds were placed at diametrically equal distances above the soil.…”

Section: Effect On Germination and Development Of Cucumber (Cucumis Smentioning

confidence: 99%

Impact of landfill leachate on the germination of Cucumber (Cucumis sativus)

Franco

Silva²,

Silveira³

et al. 2017

REGET

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The generation of landfill leachate occurs due to the degradation of solid waste by the presence of microorganisms. The bioassays allow to understand the relationship between the medium and the leachate, determining the lethal concentration capable of inhibiting 50% of test organisms (LC50), the lowest concentration with observed deleterious effect (LOEC), and the highest concentration without observed deleterious effect (NOEC). This work aimed to determine the impact of landfill leachate on germination and development of radicle and aerial part of cucumber (Cucumis sativus) on two substrates. The design was completely randomized and 6 treatments with increasing doses (leachate + deionized water): T1 = 3.125% + 96.875%; T2 = 6.25% + 93.75%; T3 = 12.5% + 87.5%; T4 = 25% + 75%; T5 = 50% + 50% and T6 = 100% leached, and the control (TC) with 100% deionized water, both in triplicates for filter and soil paper substrates. Cucumber tolerance to leachate was identified. It was not possible to determine the LC50 from the treatments, however the 50% and 100% doses inhibited the germination by 83% and 100%, and the NOEC and LOEC values were identified in treatments 12.5%/25% and 25%/50% on filter paper and soil, respectively.

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“…Inhibition values higher than 40% in the test-organisms are considered toxic, while non-toxic inhibition values range is between 0 and of 10% of the test organism. Early toxicity inhibition is between 10 and 40% of non-germinated test-organisms (Lopes et al, 2010).…”

Section: Ecotoxicity -Seed Germinationmentioning

confidence: 99%

Toxicity Assessment of Contaminated Soil Using Seeds as Bioindicators

Cruz

Lopes

Montagnolli

et al. 2013

Journal of Applied Biotechnology

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The evaluation soil quality after bioremediation processes solely on chemical data does not include the effects of toxic substances in organisms. Thus, ecotoxicological assays with seeds are applied to assess the effect of toxic substances in organisms according to their germination sensitivity. The objective of this study was to evaluate a contaminated soil with diesel, biodiesel and waste lubricat oil in ecotoxicological bioassays using seeds of Cucumis sativus (cucumber), Brassica oleracea (kale) and Barbarea verna (cress) as test organisms. The sample of contaminated soil was buried to allow contact with microorganisms that are naturally present in the soil and can be capable to biodegrade the contaminant. Each soil sample was removed monthly and the potential toxicity of contaminants was evaluated by examining germination rates according to biodegradation time in soil. The results indicate that the species Barbarea verna is not a good test organism due to its low germination rate. The study suggest that the contact of waste lubricant oil and diesel with the embryo was hampered by the seed coats and the hydrophobicity these substances, preventing the entry of substances which may be toxic to the embryo. Also, Cucumis sativus and Brassica oleracea showed that after two months of biodegradation, biodiesel is the most toxic contaminant during seed development.

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Toxicity and Biodegradation in Sandy Soil Contaminated by Lubricant Oils

Cited by 28 publications

References 14 publications

Toxicological evaluation of vegetable oils and biodiesel in soil during the biodegradation process

Toxicological evaluation of vegetable oils and biodiesel in soil during the biodegradation process

Impact of landfill leachate on the germination of Cucumber (Cucumis sativus)

Toxicity Assessment of Contaminated Soil Using Seeds as Bioindicators

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