title: Characterization of a biosurfactant produced by Pseudomonas cepacia CCT6659 in the presence of industrial wastes and its application in the biodegradation of hydrophobic compounds in soil.
abstract: The bacterium Pseudomonas cepacia CCT6659 cultivated with 2% soybean waste frying oil and 2% corn steep liquor as substrates produced a biosurfactant with potential application in the bioremediation of soils. The biosurfactant was classified as an anionic biomolecule composed of 75% lipids and 25% carbohydrates. Characterization by proton nuclear magnetic resonance ((1)H and (13)C NMR) revealed the presence of carbonyl, olefinic and aliphatic groups, with typical spectra of lipids. Four sets of biodegradation experiments were carried out with soil contaminated by hydrophobic organic compounds amended with molasses in the presence of an indigenous consortium, as follows: Set 1-soil+bacterial cells; Set 2-soil+biosurfactant; Set 3-soil+bacterial cells+biosurfactant; and Set 4-soil without bacterial cells or biosurfactant (control). Significant oil biodegradation activity (83%) occurred in the first 10 days of the experiments when the biosurfactant and bacterial cells were used together (Set 3), while maximum degradation of the organic compounds (above 95%) was found in Sets 1-3 between 35 and 60 days. It is evident from the results that the biosurfactant alone and its producer species are both capable of promoting biodegradation to a large extent.
authors.affiliation: Mestrado em Desenvolvimento de Processos Ambientais, Universidade Católica de Pernambuco, Rua do Príncipe, n. 526, Boa Vista, CEP: 50050-900 Recife, PE, Brazil; Centro de Gestão de Tecnologia e Inovação (CGTI), Rua da Praia, n.11, São José, CEP: 50000-000, Recife, PE, Brazil.
authors.forename: Elias J
authors.initials: EJ
authors.lastname: Silva
authors.affiliation: Centro de Ciências e Tecnologia, Universidade Católica de Pernambuco, Rua do Príncipe, n. 526, Boa Vista, CEP: 50050-900 Recife, PE, Brazil; Centro de Gestão de Tecnologia e Inovação (CGTI), Rua da Praia, n.11, São José, CEP: 50000-000, Recife, PE, Brazil.
authors.forename: Nathália Maria P
authors.initials: NM
authors.lastname: Rocha e Silva
authors.affiliation: Centro de Ciências e Tecnologia, Universidade Católica de Pernambuco, Rua do Príncipe, n. 526, Boa Vista, CEP: 50050-900 Recife, PE, Brazil; Centro de Gestão de Tecnologia e Inovação (CGTI), Rua da Praia, n.11, São José, CEP: 50000-000, Recife, PE, Brazil.
authors.forename: Raquel D
authors.initials: RD
authors.lastname: Rufino
authors.affiliation: Centro de Ciências e Tecnologia, Universidade Católica de Pernambuco, Rua do Príncipe, n. 526, Boa Vista, CEP: 50050-900 Recife, PE, Brazil; Centro de Gestão de Tecnologia e Inovação (CGTI), Rua da Praia, n.11, São José, CEP: 50000-000, Recife, PE, Brazil.
authors.forename: Juliana M
authors.initials: JM
authors.lastname: Luna
authors.affiliation: Departamento de Química Fundamental, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235-Cidade Universitária, CEP: 50670-901 Recife, PE, Brazil.
authors.forename: Ricardo O
authors.initials: RO
authors.lastname: Silva
authors.affiliation: Centro de Ciências e Tecnologia, Universidade Católica de Pernambuco, Rua do Príncipe, n. 526, Boa Vista, CEP: 50050-900 Recife, PE, Brazil; Centro de Gestão de Tecnologia e Inovação (CGTI), Rua da Praia, n.11, São José, CEP: 50000-000, Recife, PE, Brazil. Electronic address: leonie@unicap.br.
authors.forename: Leonie A
authors.initials: LA
authors.lastname: Sarubbo
mesh_terms: D001673:Biodegradation, Environmental; D016956:Burkholderia cepacia / Q000378:metabolism*; D066241:Carbon-13 Magnetic Resonance Spectroscopy; D002855:Chromatography, Thin Layer; D057927:Hydrophobic and Hydrophilic Interactions; D007220:Industrial Waste; D009930:Organic Chemicals / Q000302:isolation & purification*; D066244:Proton Magnetic Resonance Spectroscopy; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000302:isolation & purification*; D013501:Surface-Active Agents / Q000378:metabolism*
chemical_list: D007220:Industrial Waste; D009930:Organic Chemicals; D012987:Soil; D012989:Soil Pollutants; D013501:Surface-Active Agents
keywords: Biodegradation; Biosurfactant; Hydrophobic organic compounds; Industrial residues; Pseudomonas