Effect of metal interference, pH and temperature on Cu and Ni biosorption by Chlorella vulgaris and Chlorella miniata

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

71 Scopus Citations
View graph of relations

Author(s)

  • P. S. Lau
  • H. Y. Lee
  • C. C K Tsang
  • N. F Y Tam
  • Y. S. Wong

Detail(s)

Original languageEnglish
Pages (from-to)953-961
Journal / PublicationEnvironmental Technology
Volume20
Issue number9
Publication statusPublished - 1999

Abstract

Chlorella vulgaris, an unicellular green alga which had extensively been used for wastewater nutrient removal studies, and a locally isolated Chlorella miniata were assessed for their Cu and Ni biosorption from single and mixed metal solutions. The locally isolated C. miniata had a higher maximal binding (q(max)) of 23.26 mg Cu g-1 d.w. and 20.37 mg Ni g-1 d.w. than the 18.72 Cu g-1 d.w. and 12.06 mg Ni g-1 d.w. of C. vulgaris when unit biomass was concerned. However, when normalized to surface area of the cells, C miniata showed a higher Ni but lower Cu biosorption than C vulgaris. Both Chlorella species had a preferential Cu to Ni biosorption from mixed metal solutions. The Cu biosorption by both algal biomass was not significantly affected in the presence of 30 mg l-1 Ni. When Ni increased to 300 mg l-1, the q(max) of Cu was reduced by 13% in C. vulgaris and 7.7% in C. miniata. On the contrary, presence of 30 mg l-1 Cu already lowered the q(max) of Ni by 12% and 17% in C. vulgaris and C. miniata, respectively. And virtually, no Ni biosorption was observed in presence of 300 mg l-1 Cu. Optimal Cu and Ni biosorption was found at pH 6. Although temperature had a significant effect on the biosorption process, its impact was much less than that of pH and the interference effect of Cu in the case of Ni biosorption.

Research Area(s)

  • Biosorption, Chlorella algal cells, Metal interference, pH, Surface area, Temperature

Citation Format(s)

Effect of metal interference, pH and temperature on Cu and Ni biosorption by Chlorella vulgaris and Chlorella miniata. / Lau, P. S.; Lee, H. Y.; Tsang, C. C K et al.
In: Environmental Technology, Vol. 20, No. 9, 1999, p. 953-961.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review