title: Accelerated degradation of PAHs using edaphic biostimulants obtained from sewage sludge and chicken feathers.
abstract: We studied in the laboratory the bioremediation effects over a 100-day period of three edaphic biostimulants (BS) obtained from sewage sludge (SS) and from two different types of chicken feathers (CF1 and CF2), in a soil polluted with three polycyclic aromatic hydrocarbons (PAH) (phenanthrene, Phe; pyrene, Py; and benzo(a)pyrene, BaP), at a concentration of 100 mg kg(-1) soil. We determined their effects on enzymatic activities and on soil microbial community. Those BS with larger amounts of proteins and a higher proportion of peptides (<300 daltons), exerted a greater stimulation on the soil biochemical properties and microbial community, possibly because low molecular weight proteins can be easily assimilated by soil microorganisms. The soil dehydrogenase, urease, β-glucosidase and phosphatase activities and microbial community decreased in PAH-polluted soil. This decrease was more pronounced in soils contaminated with BaP than with Py and Phe. The application of the BS to PAH-polluted soils decreased the inhibition of the soil biological properties, principally at 7 days into the experiment. This decrease was more pronounced in soils contaminated with BaP than with Py and Phe and was higher in polluted soils amended with CF2, followed by SS and CF1, respectively.
authors.affiliation: Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad de Sevilla, C/ Prof. García González 2, 41012 Sevilla, Spain.
authors.forename: Bruno
authors.initials: B
authors.lastname: Rodríguez-Morgado
authors.affiliation: Grupo de Investigación Edafología Ambiental, Departamento de Cristalografía, Mineralogía y Química Agrícola, E.T.S.I.A. Universidad de Sevilla, Crta de Utrera km. 1, 41013 Sevilla, Spain.
authors.forename: Isidoro
authors.initials: I
authors.lastname: Gómez
authors.affiliation: Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad de Sevilla, C/ Prof. García González 2, 41012 Sevilla, Spain.
authors.forename: Juan
authors.initials: J
authors.lastname: Parrado
authors.affiliation: Departamento de Conservación de Suelos y Agua y Manejo de Residuos Orgánicos, Centro de Edafología y Biología Aplicada del Segura, CEBAS-CSIC, P.O. Box 4195, 30080 Murcia, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: García
authors.affiliation: Departamento de Conservación de Suelos y Agua y Manejo de Residuos Orgánicos, Centro de Edafología y Biología Aplicada del Segura, CEBAS-CSIC, P.O. Box 4195, 30080 Murcia, Spain.
authors.forename: Teresa
authors.initials: T
authors.lastname: Hernández
authors.affiliation: Grupo de Investigación Edafología Ambiental, Departamento de Cristalografía, Mineralogía y Química Agrícola, E.T.S.I.A. Universidad de Sevilla, Crta de Utrera km. 1, 41013 Sevilla, Spain. Electronic address: mtmoral@us.es.
authors.forename: Manuel
authors.initials: M
authors.lastname: Tejada
mesh_terms: D000818:Animals; D001564:Benzo(a)pyrene / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002645:Chickens; D005241:Feathers; D010616:Phenanthrenes / Q000378:metabolism*; D011721:Pyrenes / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D010616:Phenanthrenes; D011721:Pyrenes; D012722:Sewage; D012989:Soil Pollutants; D001564:Benzo(a)pyrene; C031181:phenanthrene; C030984:pyrene
keywords: Benzo(a)pyrene; Edaphic biostimulants; Phenanthrene; Pyrene; Soil biochemical properties; Soil microbial community