Influence of citrate on adsorption of zinc in soils

Arthur Paul Schwab, Yinghong He, Margaret Katherine Banks

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Adsorption of zinc to two soils was quantified in the presence of citrate ranging in concentration from 0 to 10 mM/L. For both soils, Zn adsorption increased with increasing citrate up to a concentration of 2mM/L. With increasing citrate concentrations between 2 and 10 mM/L, Zn adsorption increased in one soil (pH 4.8) but decreased in the second (pH 5.8). Adsorption of a Zn-citrate complex is key to the Zn adsorption in both soils. The soil with the higher pH appears to have a significantly lower adsorption capacity for the complex than the soil with pH 4.8. Activity-based adsorption modeling supports these experimental observations.

Original languageEnglish (US)
Pages (from-to)1180-1187
Number of pages8
JournalJournal of Environmental Engineering
Volume130
Issue number10
DOIs
StatePublished - Oct 2004

Keywords

  • Adsorption
  • Contamination
  • Heavy metals
  • Soil pollution
  • Zinc

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Environmental Chemistry
  • Environmental Science(all)

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