Prediction of Pb speciation in concentrated and dilute nutrient solutions

Kopittke, P. M., Asher, C. J. and Menzies, N. W. (2008) Prediction of Pb speciation in concentrated and dilute nutrient solutions. Environmental Pollution, 153 3: 548-554. doi:10.1016/j.envpol.2007.09.012

Author Kopittke, P. M.
Asher, C. J.
Menzies, N. W.
Title Prediction of Pb speciation in concentrated and dilute nutrient solutions
Journal name Environmental Pollution   Check publisher's open access policy
ISSN 0269-7491
Publication date 2008-06
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.envpol.2007.09.012
Volume 153
Issue 3
Start page 548
End page 554
Total pages 7
Editor William. J. Manning
Place of publication London, England
Publisher Elsevier Sciences
Collection year 2009
Language eng
Subject 961205 Rehabilitation of Degraded Mining Environments
050304 Soil Chemistry (excl. Carbon Sequestration Science)
050207 Environmental Rehabilitation (excl. Bioremediation)
Formatted abstract
 Despite the presence of numerous studies in the literature examining the phytotoxicity of Pb, there is a lack of precise quantitative data on limiting concentrations of Pb for plant growth. Using the PhreeqcI chemical equilibrium model, simulations were conducted to examine the speciation of Pb in concentrated and dilute nutrient solutions. Due to the higher P concentration of Hoagland's solution (1000 μM), precipitation of chloropyromorphite (Pb5(PO4)3Cl) was predicted to occur at lower pH values, and at lower Pb concentrations, than for a dilute nutrient solution (2 μM P). Although nutrient solutions prepared in the glasshouse were supersaturated (and Pb concentrations were substantially higher than predicted by modeling), they confirmed the importance of the P concentration in influencing the precipitation of Pb. Given the low solubility of Pb-phosphates, nutrient solutions with low P concentrations should be utilized, and plant growth should be related to measured Pb concentrations rather than to the quantity of Pb initially added.
Keyword Chloropyromorphite
Phosphorus concentration
Solution culture
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Available online 25 October 2007.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Agriculture and Food Sciences
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 16 Apr 2009, 11:58:55 EST by Emma Cushworth on behalf of School of Land, Crop and Food Sciences