Prediction of Soluble Nickel Removal by Activated Sludge Using Free Metal Ion Concentrations

Nielsen, Jeppe S.; Hrudey, Steve E.; Cantwell, Frederick F.

doi:10.2166/wst.1987.0224

Jeppe S. Nielsen;

Jeppe S. Nielsen

*School of Civil Engineering, N.S.W. Institute of Technology, Broadway, New South Wales 2007, Australia

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Steve E. Hrudey;

Steve E. Hrudey

**Department of Civil Engineering, University of Alberta, Edmonton, Alberta T6G2G7, Canada

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Frederick F. Cantwell

***Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada

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Batch isotherm studies using spiked sewage samples containing a range of total soluble nickel concentrations typical of municipal sewage strongly suggested that it is the free (i.e. uncomplexed) nickel ion that is sorbed by activated sludge. Equations relating nickel uptake by activated sludge to free nickel ion concentrations and the extent of complexation in untreated sewage were developed and applied. Predicted and measured nickel removals generally agreed to within ± 30%.

Sewage, nickel, free metal ion concentration, activated sludge, removal; prediction

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Prediction of Soluble Nickel Removal by Activated Sludge Using Free Metal Ion Concentrations

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