Research Center istencia En Tecnologia seno Del Estado Of Jalisco Ac Ciatej

Guadalajara, Mexico

Research Center istencia En Tecnologia seno Del Estado Of Jalisco Ac Ciatej

Guadalajara, Mexico
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Garcia-Segura D.,Institute Ecologia Ac Inecol | Castillo-Murrieta I.M.,Institute Ecologia Ac Inecol | Martinez-Rabelo F.,Institute Ecologia Ac Inecol | Gomez-Anaya A.,Institute Ecologia Ac Inecol | And 4 more authors.
Geoderma | Year: 2017

Mexico is an oil producing country; the extraction of oil on land has left many sites with soil contaminated by oil spills. The aim of our study was to determine the impact of this contamination on the soil fauna; thus we compared the macro and mesofauna from a non contaminated soil to a moderately and highly polluted soil caused by oil extraction. Total petroleum hydrocarbons (TPH) and soil physicochemical characterization was determined. TPH results showed two areas: highly contaminated (8150mgTPH/kg) and moderately contaminated (1800mgTPH/kg). The macrofauna abundance was not significantly different between the sites. The Hymenoptera, Gastropoda, Isoptera and the earthworms were the most abundant groups. The Gastropoda population decreased with the increase of TPH concentration while other groups of macrofauna increased their density (ants, isopteran and earthworms). The mesofauna was significantly more abundant in the moderately contaminated area (50,500 Ind./m2). The main groups present were the Acari, Collembola and ants. The Acari orders were present in similar proportions both in the control soil and in the medium and highly contaminated area, while the Collembola families varied in their proportion in the three areas. The diversity index showed that the moderately contaminated site was the more diverse both in macro and mesofauna. Many groups of fauna (earthworms, ants and Isoptera) were positively correlated to some petroleum hydrocarbons (PH), such as naphthalene. The Gastropoda and Acari were the groups that were most negatively correlated to the different hydrocarbons. The PCA differentiated significantly three groups, both in the case of macrofauna as well as for mesofauna. Earthworms were clearly associated with TPH specially the native species Protozapotecia australis. These results indicate that oil spills could be a source of food for soil organisms after oxygenation and weathering. © 2017 Elsevier B.V.


Moran-Salazar R.G.,Research Center istencia En Tecnologia seno Del Estado Of Jalisco Ac Ciatej | Marino-Marmolejo E.N.,Biotecnologia Medica y Farmaceutica | Rodriguez-Campos J.,Servicios Analiticos y Metrologicos | Davila-Vazquez G.,Research Center istencia En Tecnologia seno Del Estado Of Jalisco Ac Ciatej | Contreras-Ramos S.M.,Research Center istencia En Tecnologia seno Del Estado Of Jalisco Ac Ciatej
Environmental Technology (United Kingdom) | Year: 2016

Agave tequilana Weber is used in tequila and fructans production, with agave bagasse generated as a solid waste. The main use of bagasse is to produce compost in tequila factories with a long traditional composting that lasts 6-8 months. The aim of this study was to evaluate the degradation of agave bagasse by combining a pretreatment with fungi and vermicomposting. Experiments were carried out with fractionated or whole bagasse, sterilized or not, subjecting it to a pretreatment with Bjerkandera adusta alone or combined with native fungi, or only with native bagasse fungi (non-sterilized), for 45 days. This was followed by a vermicomposting with Eisenia fetida and sewage sludge, for another 45 days. Physicochemical parameters, lignocellulose degradation, stability and maturity changes were measured. The results indicated that up to 90% of the residual sugars in bagasse were eliminated after 30 days in all treatments. The highest degradation rate in pretreatment was observed in non-sterilized, fractionated bagasse with native fungi plus B. adusta (BNFns) (71% hemicellulose, 43% cellulose and 71% lignin) at 45 days. The highest total degradation rates after vermicomposting were in fractionated bagasse pre-treated with native fungi (94% hemicellulose, 86% cellulose and 91% lignin). However, the treatment BNFns showed better maturity and stability parameters compared to that reported for traditional composts. Thus, it seems that a process involving vermicomposting and pretreatment with B. adusta could reduce the degradation time of bagasse to 3 months, compared to the traditional composting process, which requires from 6 to 8 months. © 2015 Taylor & Francis.


Hernandez-Castellanos B.,University of Xalapas | Ortiz-Ceballos A.,University of Xalapas | Martinez-Hernandez S.,University of Xalapas | Noa-Carrazana J.C.,University of Xalapas | And 3 more authors.
Applied Soil Ecology | Year: 2013

The endogeic earthworm Pontoscolex corethrurus (Müller, 1857) was the most abundant species (75%) in soil contaminated with hydrocarbons, mostly benzo(a)pyrene (BaP), in the state of Tabasco (Mexico). The earthworm P. corethrurus was tested for its capacity to remove 100mgBaPkg-1 from an Anthrosol soil (sterilized or not) and amended with legume Mucuna pruriens (L.) DC. var. utilis (Wall. ex Wight) Baker ex Burck (3%) or the grass Brachiaria humidicola (L.) DC (3%) (recently renamed as Urochloa humidicola (Rendle) Morrone & Zuloaga) in an aerobic incubation experiment. P. corethrurus removed 26.6mgBaPkg-1 from the sterilized soil and application of B. humidicola as feed increased this to 35.7mgBaPkg-1 and M. pruriens to 34.2mgBaPkg-1 after 112 days. The autochthonous microorganisms removed 9.1mgBaPkg-1 from the unsterilized soil and application of B. humidicola increased this to 18.0mgBaPkg-1 and M. pruriens to 11.2mgBaPkg-1. Adding P. corethrurus to the unsterilized soil accelerated the removal of BaP and 36.1mgkg-1 was dissipated from soil. It was found that the autochthonous microorganisms removed BaP from soil, but addition of P. corethrurus increased the dissipation 4-fold. The endogeic earthworm P. corethrurus can thus be used to remediate hydrocarbon-contaminated soils in tropical regions. © 2013 Elsevier B.V.

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