SciELO - Scientific Electronic Library Online

 
vol.11 número1The effect of activated charcoal, indol acetic acid (IAA) and benzylaminopurine (BAP) on Epidendrum elongatum Jacq protocorm-like body (PLB) development in in vitro conditionsAutoctonous yeasts having fermentation ability in producing ethanol from Musa (AAB Simmonds) plantain surplus pulp in the Córdoba department of Colombia índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Revista Colombiana de Biotecnología

versão impressa ISSN 0123-3475

Resumo

PAURO ROQUE, Juan José; CHOQUE YUCRA, Martín; POCCOHUANCA AGUILAR, Roger  e  MAMANI CANQUI, Alfredo. Studies of lead biosorption by Saccharomyces cereviceae in aqueous solutions. Rev. colomb. biotecnol [online]. 2009, vol.11, n.1, pp.33-39. ISSN 0123-3475.

Lake Titicaca's ecosystem and that of its tributaries in Puno (Peru) are being disturbed by heavy metals resulting from emergent mineral activity. Biological processes involving microorganisms such as yeasts (bioremediation) are being used for controlling and reducing such pollution. This research was aimed at evaluating Saccharomyces cereviceae's lead biosorption capacity in aqueous solutions and evaluating the influence of two pH levels on biosorption. Two S. cereviceae concentrations (cel/mL) were tested; these concentrations were quantified in a haemocytometer and then put into a solution having a known lead concentration (5 and 25 mg/L). Lead concentrations were read after 5, 60 and 120 minutes. The results revealed that the best biosorption level was obtained with a 5 x 106 cel/mL S. cereviceae concentration at 5.14 pH. S. cereviceae thus constitute a good alternative for lead biosorption; however, its validation in Peruvian altiplano field conditions remains to be tested.

Palavras-chave : Biosorption; lead; yeast.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons