Modification of the degradative capacity of a soil artificially contaminated with diesel

Cordero, Wagner Peña; Trasar-Cepeda, Carmen; Gil‐Sotres, F.; Leirós, M.C.

doi:10.1016/j.chemosphere.2006.09.083

Cited by 11 publications

(12 citation statements)

References 21 publications

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“…Pena et al (2007) also showed a decrease in microbial biomass carbon and enzyme activities when soil is artificially contaminated with diesel, but also showed an increase in soil respiration and nitrogen mineralization. Using the soil quality index established by Trasar-Cepeda et al (1998), Pena et al (2007) showed a deviation in total N calculated by that model in comparison with real N total, which is related with a loss of soil quality after diesel application. Wang et al (2007) showed a decrease in microbial biomass and enzyme activity in soils contaminated with heavy metals in China.…”

Section: Indicators Usedmentioning

confidence: 93%

Past, present and future of soil quality indices: A biological perspective

et al. 2008

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Section: Indicators Usedmentioning

confidence: 93%

Past, present and future of soil quality indices: A biological perspective

et al. 2008

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“…The incubation time periods in the present study were one, two, and three months and therefore may have been too long between the start of the experiment and time of first sampling to capture the initial inhibition of N mineralization. Other researchers have observed an increase in N mineralization for soils with a high concentration of diesel, which can be attributed to an increase in nitrogenous organic compounds from dead microorganisms [30]. Accumulation of NH þ 4 may occur in hydrocarbon-contaminated soil due to an increase in N mineralization and a decrease in nitrification [30].…”

mentioning

confidence: 98%

“…Other researchers have observed an increase in N mineralization for soils with a high concentration of diesel, which can be attributed to an increase in nitrogenous organic compounds from dead microorganisms [30]. Accumulation of NH þ 4 may occur in hydrocarbon-contaminated soil due to an increase in N mineralization and a decrease in nitrification [30].…”

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confidence: 98%

Validating potential toxicity assays to assess petroleum hydrocarbon toxicity in polar soil

Harvey

Snape

Siciliano

2011

Environmental Toxicology and Chemistry

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Potential microbial activities are commonly used to assess soil toxicity of petroleum hydrocarbons (PHC) and are assumed to be a surrogate for microbial activity within the soil ecosystem. However, this assumption needs to be evaluated for frozen soil, in which microbial activity is limited by liquid water (θ(liquid)). Influence of θ(liquid) on in situ toxicity was evaluated and compared to the toxicity endpoints of potential microbial activities using soil from an aged diesel fuel spill at Casey Station, East Antarctica. To determine in situ toxicity, gross mineralization and nitrification rates were determined by the stable isotope dilution technique. Petroleum hydrocarbon-contaminated soil (0-8,000 mg kg(-1)), packed at bulk densities of 1.4, 1.7, and 2.0 g cm(-3) to manipulate liquid water content, was incubated at -5°C for one, two, and three months. Although θ(liquid) did not have a significant effect on gross mineralization or nitrification, gross nitrification was sensitive to PHC contamination, with toxicity decreasing over time. In contrast, gross mineralization was not sensitive to PHC contamination. Toxic response of gross nitrification was comparable to potential nitrification activity (PNA) with similar EC25 (effective concentration causing a 25% effect in the test population) values determined by both measurement endpoints (400 mg kg(-1) for gross nitrification compared to 200 mg kg(-1) for PNA), indicating that potential microbial activity assays are good surrogates for in situ toxicity of PHC contamination in polar regions.

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“…El petróleo según el tiempo que permanece en el ambiente puede ser fresco (PF) o intemperizado (PI), por lo que su efecto tóxico, cancerígeno, mutagénico y genotóxico puede variar (Caravaca & Roldán 2003;Rainho, Corrêa, Mazzei, Aiub, & Felzenszwalb, 2013). Los hidrocarburos del PF pueden volatilizarse, disolverse en la solución del suelo, ser absorbidos en la superficie del suelo o ser transformados en otros compuestos por diferentes procesos químicos y bioquímicos (Peña, Trasar, Gil, & Leirós, 2007;Wang, Zhan, Zhou, & Lin, 2010). Con la modificación de las propiedades químicas del suelo y los cambios en los ciclos bioquímicos, esto origina la mortalidad de la flora y fauna, (OMI, 2005;Hernández-Castellanos et al, 2013).…”

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Uso de Leersia hexandra (Poaceae) en la fitorremediación de suelos contaminados con petróleo fresco e intemperizado

Arias-Trinidad

Rivera-Cruz

Roldán-Garrigós

et al. 2016

RBT

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Use of Leersia hexandra (Poaceae) for soil phytoremediation in soils contaminated with fresh and weathered oil. The oil industry has generated chronic oil spills and their accumulation in wetlands of the state of Tabasco, in Southeastern Mexico. Waterlogging is a factor that limits the use of remediation technologies because of its high cost and low levels of oil degradation. However, Leersia hexandra is a grass that grows in these contaminated areas with weathered oil. The aim of the study was to evaluate the bacteria density, plant biomass production and phytoremediation of L. hexandra in contaminated soil. For this, two experiments in plastic tunnel were performed with fresh (E1) and weathered petroleum (E2) under waterlogging experimental conditions. The E1 was based on eight doses: 6 000, 10 000, 30 000, 60 000, 90 000, 120 000, 150 000 and 180 000 mg.kg -1 dry basis (d. b.) of total petroleum hydrocarbons fresh (TPH-F), and the E2, that evaluated five doses: 14 173, 28 400, 50 598, 75 492 and 112 142 mg. kg -1 d. b. of total petroleum hydrocarbons weathered (TPH-W); a control treatment with 2 607 mg.kg -1 d. b. was used. Each experiment, with eight replicates per treatment, evaluated after three and six months: a) microbial density of total free-living nitrogen-fixing bacteria (NFB) of Azospirillum (AZP) and Azotobacter group (AZT), for viable count in serial plate; b) dry matter production (DMP), quantified gravimetrically as dry weight of L. hexandra; and c) the decontamination percentage of hydrocarbons (PDH) by Soxhlet extraction. In soil with TPH-F, the NFB, AZP y AZT populations were stimulated five times more than the control both at the three and six months; however, concentrations of 150 000 and 180 000 mg.kg -1 d. b. inhibited the bacterial density between 70 and 89 %. Likewise, in soil with TPH-W, the FNB, AZP and AZT inhibitions were 90 %, with the exception of the 14 173 mg.kg -1 d. b. treatment, which stimulated the NFB and AZT in 2 and 0.10 times more than the control, respectively. The DMP was continued at the six months in the experiments, with values of 63 and 89 g in fresh and weathered petroleum, respectively; had no significant differences with the control (p≤0.05). The PDH reached values of 66 to 87 % both TPH-F and TPH-W at six months, respectively. These results demonstrated the ability the L. hexandra rhizosphere to stimulate the high NFB density, vegetal biomass production and phytoremediation of contaminated soils (with fresh and weathered petroleum), in a tropical waterlogging environment. Rev. Biol. Trop. 65 (1): 21-30. Epub 2017 March 01.

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Modification of the degradative capacity of a soil artificially contaminated with diesel

Cited by 11 publications

References 21 publications

Past, present and future of soil quality indices: A biological perspective

Past, present and future of soil quality indices: A biological perspective

Validating potential toxicity assays to assess petroleum hydrocarbon toxicity in polar soil

Uso de Leersia hexandra (Poaceae) en la fitorremediación de suelos contaminados con petróleo fresco e intemperizado

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