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Rhamnolipids Application for the Removal of Vanadium from Contaminated Sediment.
San Martín, Yaima Barrios; Toledo León, Heidy F; Rodríguez, Arelis Ábalos; Marqués, Ana M; López, Maria I Sánchez.
Afiliação
  • San Martín YB; Laboratory of Biotechnology, Oil Research Centre (Ceinpet), Churruca #481, CP 12600, Cerro, La Habana, Cuba. yy@ceinpet.cupet.cu.
  • Toledo León HF; Laboratory of Biotechnology, Oil Research Centre (Ceinpet), Churruca #481, CP 12600, Cerro, La Habana, Cuba.
  • Rodríguez AÁ; University of Orient, Santiago de Cuba, Cuba.
  • Marqués AM; Laboratory of Microbiology, Faculty of Pharmacy, University of Barcelona, Barcelona, Spain.
  • López MIS; Faculty of Biology, University of Havana, Havana, Cuba.
Curr Microbiol ; 78(5): 1949-1960, 2021 May.
Article em En | MEDLINE | ID: mdl-33811507
The use of biosurfactants in bioremediation of hydrocarbons and in the removal of heavy metals in crude oils is considered an attractive subject. The vanadium pollution in soil and sediments had attracted research interest in exploring eco-friendly methods of remediation. The present study was conducted to evaluate the potential of a biosurfactant to remove vanadium from artificially contaminated sand. The biosurfactant producer's strain selection process was carried out from 23 strains in two steps. In the primary screening, four preliminary tests were carried out: the emulsification index (24 and 72 h), the surface tension, and the rate of bacterial adhesion to hydrocarbons. In the secondary screening, the surface tension and rhamnolipids concentration were determined, also critical micellar concentration and dilution were calculated. The RNA 16s of selected strain was sequence and the strain was identified as Pseudomonas sp. By chromatographic and spectroscopic assays, the structure of the rhamnolipids was determined. The maximal vanadium removal efficiency (85.5%) was achieved with a rhamnolipids' concentration of 240 mg l-1. The vanadium concentration was determined by spectroscopic technique. Rhamnolipids produced by this strain can potentially be used in the removal of vanadium.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Vanádio Idioma: En Revista: Curr Microbiol Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Cuba País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Vanádio Idioma: En Revista: Curr Microbiol Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Cuba País de publicação: Estados Unidos