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

1987 ◽  
Vol 19 (3-4) ◽  
pp. 439-448 ◽  
Author(s):  
Jeppe S. Nielsen ◽  
Steve E. Hrudey ◽  
Frederick F. Cantwell
Keyword(s):  
Activated Sludge ◽  
Metal Ion ◽  
Municipal Sewage ◽  
Nickel Ion ◽  
Ion Concentrations ◽  
Untreated Sewage ◽  
Nickel Uptake ◽  
Nickel Removal ◽  
Free Metal ◽  
Free Metal Ion

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%.

Role of the free metal ion species in soluble nickel removal by activated sludge

1984 ◽  
Vol 18 (11) ◽  
pp. 883-886 ◽  
Author(s):  
Jeppe S. Nielsen ◽  
Steve E. Hrudey ◽  
Frederick F. Cantwell
Keyword(s):  
Activated Sludge ◽  
Metal Ion ◽  
Nickel Removal ◽  
Ion Species ◽  
Free Metal ◽  
Free Metal Ion

Determination of Free Metal Ion Concentrations Using Bioassays

1981 ◽  
Vol 38 (8) ◽  
pp. 999-1002 ◽  
Author(s):  
Uwe Borgmann
Keyword(s):  
Metal Toxicity ◽  
Metal Ion ◽  
Natural Waters ◽  
Complexing Agent ◽  
Aquatic Life ◽  
Ion Concentrations ◽  
Complexing Capacity ◽  
Before And After ◽  
Free Metal ◽  
Free Metal Ion

A procedure was developed by which free metal ion concentrations, toxic to aquatic life, can be calculated by comparing metal toxicity before and after addition of a complexing agent of known complexing capacity. Application of this method suggests that the growth of freshwater copepods is affected at free copper concentrations around 10−10 to 10−9 mol∙L−1. In natural waters, with unidentified ligands of unknown complexing ability, this procedure provides the only method currently available for estimating free metal concentrations at the low levels often causing sublethal toxicity to aquatic organisms.Key words: metal toxicity, complexation, free metal, copepods, copper

Measuring Free Metal Ion Concentrations in Situ in Natural Waters Using the Donnan Membrane Technique

2006 ◽  
Vol 40 (3) ◽  
pp. 955-961 ◽  
Author(s):  
Erwin J. J. Kalis ◽  
Weng ◽  
Freerk Dousma ◽  
Erwin J. M. Temminghoff ◽  
Willem H. Van Riemsdijk
Keyword(s):  
Metal Ion ◽  
Natural Waters ◽  
Ion Concentrations ◽  
Membrane Technique ◽  
Donnan Membrane Technique ◽  
Free Metal ◽  
Free Metal Ion

Metal bioaccumulation and oxidative stress in yellow perch (Perca flavescens) collected from eight lakes along a metal contamination gradient (Cd, Cu, Zn, Ni)

2005 ◽  
Vol 62 (3) ◽  
pp. 563-577 ◽  
Author(s):  
Anik Giguère ◽  
Peter GC Campbell ◽  
Landis Hare ◽  
Carole Cossu-Leguille
Keyword(s):  
Oxidative Stress ◽  
Metal Ion ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Metal Exposure ◽  
Metal Concentrations ◽  
Individual Level ◽  
Ion Concentrations ◽  
Free Metal ◽  
Free Metal Ion

Links among metal exposure, metal accumulation, and metal-induced effects were explored in indigenous yellow perch (Perca flavescens) collected from eight lakes located along a metal concentration gradient in two mining regions. Fish exposure to Cd, Cu, Ni, and Zn was estimated on the basis of calculated free metal ion concentrations in lake waters. Hepatic metal concentrations were determined and various markers of oxidative stress were measured to assess metal effects in liver cells. Accumulated metals were not consistently related to ambient free metal ion concentrations, possibly because of unaccounted for fluctuations in lake water metal concentrations. Accumulated metals were associated with limited oxidative stress in perch livers, as evidenced by reductions in glutathione concentrations and glutathione reductase activities. However, this stress appeared to be minor, since increasing hepatic Cu concentrations were associated with reduced lipid peroxidation, a response opposite to that predicted from basic principles. Our results suggest that oxidative stress will not have direct repercussions on the health of the perch at the individual level. We speculate that the observed increase in metallothionein concentrations with increasing accumulated metals might afford protection against reactive oxygen species.

scholarly journals Determination of free metal ion concentrations with AGNES in low ionic strength media

2013 ◽  
Vol 689 ◽  
pp. 276-283 ◽  
Author(s):  
D. Aguilar ◽  
C. Parat ◽  
J. Galceran ◽  
E. Companys ◽  
J. Puy ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Metal Ion ◽  
Ion Concentrations ◽  
Low Ionic Strength ◽  
Free Metal ◽  
Free Metal Ion

scholarly journals The Gellyfish: An in situ equilibrium-based sampler for determining multiple free metal ion concentrations in marine ecosystems

2015 ◽  
Vol 34 (5) ◽  
pp. 983-992 ◽  
Author(s):  
Zhao Dong ◽  
Christopher G. Lewis ◽  
Robert M. Burgess ◽  
James P. Shine
Keyword(s):  
Metal Ion ◽  
Marine Ecosystems ◽  
Ion Concentrations ◽  
Free Metal ◽  
Free Metal Ion

Measuring Free Metal Ion Concentrations in Multicomponent Solutions Using the Donnan Membrane Technique

2007 ◽  
Vol 79 (4) ◽  
pp. 1555-1563 ◽  
Author(s):  
Erwin J. J. Kalis ◽  
Weng ◽  
Erwin J. M. Temminghoff ◽  
Willem H. van Riemsdijk
Keyword(s):  
Metal Ion ◽  
Ion Concentrations ◽  
Membrane Technique ◽  
Donnan Membrane Technique ◽  
Multicomponent Solutions ◽  
Free Metal ◽  
Free Metal Ion

scholarly journals Integrated Microanalytical System for Simultaneous Voltammetric Measurements of Free Metal Ion Concentrations in Natural Waters

2006 ◽  
Vol 18 (21) ◽  
pp. 2061-2069 ◽  
Author(s):  
Stéphane Noël ◽  
Mary-Lou Tercier-Waeber ◽  
Lin Lin ◽  
Jacques Buffle ◽  
Olivier Guenat ◽  
...  
Keyword(s):  
Metal Ion ◽  
Natural Waters ◽  
Ion Concentrations ◽  
Voltammetric Measurements ◽  
Free Metal ◽  
Free Metal Ion
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