title: Uptake of lead and its influence in the alga Selenastrum capricornutum printz.
abstract: The influence of nutrient level, hours of fight and the flux of air by volume of solution on uptake of lead has been examined from batch growth experiments carried out with the alga Selenastrum capricornutum Printz. The organic matter released by the alga has been characterized in terms of absorbance at 285 nm, dissolved organic carbon and maximum intensity of fluorescence at the excitation peak. The lability of lead complexes formed with the alga exudates has been investigated in terms of differential pulse anodic stripping voltammetry (DPASV). It has been noticed that lead inhibits the division of the cells which become bigger in size but with less pigment per cell.
authors.affiliation: Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1096 Lisboa Codex, Portugal.
authors.forename: M L
authors.initials: ML
authors.lastname: Gonçalves
authors.forename: M F
authors.initials: MF
authors.lastname: Vilhena
authors.forename: J M
authors.initials: JM
authors.lastname: Sollis
authors.forename: J M
authors.initials: JM
authors.lastname: Romero
authors.forename: M A
authors.initials: MA
authors.lastname: Sampayo