Assessment of Chromium Bioaccumulation in Pseudokirchneriella subcapitata (Korshikov) Hindak by the Central Composite Design (CCD) and Response Surface Methodology (RSM)

Authors

  • P. C. Giloni-Lima Departament of Biological Sciences, Universidade Estadual do Centro-Oeste (Unicentro), Guarapuava, PR, Brazil
  • D. Delello Water Resources and Applied Ecology Center, São Carlos Engineering School, University of São Paulo (USP), São Carlos, SP, Brazil
  • M. L. M. Cremonez Water Resources and Applied Ecology Center, São Carlos Engineering School, University of São Paulo (USP), São Carlos, SP, Brazil
  • M. N. Éler Water Resources and Applied Ecology Center, São Carlos Engineering School, University of São Paulo (USP), São Carlos, SP, Brazil
  • V. A. Lima Chemical Department, Federal Technological University of Paraná, Pato Branco, PR, Brazil
  • E. L. G. Espíndola Water Resources and Applied Ecology Center, São Carlos Engineering School, University of São Paulo (USP), São Carlos, SP, Brazil

DOI:

https://doi.org/10.5132/jbse.2012.02.007

Keywords:

Algae, biovolume, Central Composite Design, Metal, Selenastrum capricornutum

Abstract

The effects of chromium bioaccumulation in Pseudokirchneriella subcapitata were evaluated by Central Composite Design (CCD), factorial 22 and Response Surface Methodology (RSM). All the models of regression generated by CCD were highly significant, with R2 between 77 and 88%, which is the percentual variability in the response that the model can account for. This is indicative of a satisfactory representation of the process models whose data can be used for simulations of response. The maximum shrinkage biovolume presented 28–69% reduction compared to controls. Results from this study suggest that the smaller algal cells amplify metal binding sites, leading to an increased bioaccumulation and a consequential increased capacity to accumulate chromium. Nevertheless, the absorption capacity decreases for more elevated chromium concentrations and for longer exposure.

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Published

20-12-2012

How to Cite

Giloni-Lima, P. C., Delello, D., Cremonez, M. L. M., Éler, M. N., Lima, V. A., & Espíndola, E. L. G. (2012). Assessment of Chromium Bioaccumulation in Pseudokirchneriella subcapitata (Korshikov) Hindak by the Central Composite Design (CCD) and Response Surface Methodology (RSM). Ecotoxicology and Environmental Contamination, 7(2), 43–50. https://doi.org/10.5132/jbse.2012.02.007

Issue

Vol. 7 No. 2 (2012)

Section

Original Articles

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