Combined effects of water quality parameters on mixture toxicity of copper and chromium toward Daphnia magna

Hun Je Jo, Jino Son, Kijong Cho, Jinho Jung

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

In this study, a central composite design (CCD) was employed to evaluate the combined effects of pH, hardness and dissolved organic carbon (DOC) on the toxicity of a mixture of Cu(II) and Cr(VI) toward Daphnia magna. Overall, the results showed that increases in pH, hardness and DOC concentration led to decreased mixture toxicity of Cu(II) and Cr(VI) by reducing the concentrations of toxic species such as Cu2+ and HCrO4-In addition, empirical models for the prediction of 24-h and 48-h mortalities of D. magna were developed and validated by using three different sources of dissolved organic matter (DOM). Because the DOMs had different Cu(II)-binding capacities, the empirical models were revised using the ligand concentration of DOMs instead of the DOC concentration; however, the prediction capability of these models did not differ significantly. These results suggest that it is not likely that the chemical property of DOM is important for prediction of the mixture toxicity of Cu(II) and Cr(VI) toward D. magna when the ligand concentration of DOMs greatly exceed the Cu(II) concentration.

Original languageEnglish
Pages (from-to)1301-1307
Number of pages7
JournalChemosphere
Volume81
Issue number10
DOIs
Publication statusPublished - 2010 Nov

Bibliographical note

Funding Information:
This work was supported by a grant from the Basic Research Program of the Korea Science & Engineering Foundation (Grant No. R01-2005-000-10317-0) and by a Korea University Grant.

Keywords

  • Central composite design
  • Chromium
  • Copper
  • Daphnia magna
  • Empirical model
  • Mixture toxicity

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • General Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Fingerprint

Dive into the research topics of 'Combined effects of water quality parameters on mixture toxicity of copper and chromium toward Daphnia magna'. Together they form a unique fingerprint.

Cite this