Effects of humic acid and competing cations on metal uptake by Lolium perenne.

@article{Kalis2006EffectsOH,
  title={Effects of humic acid and competing cations on metal uptake by Lolium perenne.},
  author={Erwin J J Kalis and Erwin J. M. Temminghoff and Liping Weng and Willem H. van Riemsdijk},
  journal={Environmental toxicology and chemistry},
  year={2006},
  volume={25 3},
  pages={702-11}
}
Within the biotic ligand model, which describes relationships between chemical speciation and metal binding at an organism's surface, multicomponent (long-term) metal uptake by plants has seldom been studied. In the present work, we exposed perennial ryegrass to nutrient solutions with two levels of Cd, Cu, Ni, Pb, and Zn (1 and 0.1 microM) and with or without 30 mg/L of humic acid. Iron and Mn concentrations were constant over all treatments. The hypothesis tested was that humic acid lowers… CONTINUE READING

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Mentioned Connections BETA
CopperNo subtypeLead
In the present work , we exposed perennial ryegrass to nutrient solutions with two levels of Cd , Cu , Ni , Pb , and Zn ( 1 and 0.1 microM ) and with or without 30 mg / L of humic acid .
In a multicomponent system at metal concentrations of 1 microM , humic acid decreased Cu , Pb , and Fe adsorption at the root surface , but it increased Cd , Zn , and Mn adsorption at the root surface .
Complexation of cations such as Cu , Pb , and Fe with high affinity for ( dissolved ) organic matter may lead to increased uptake of cations with low affinity for organic matter ( Ni , Zn , and Cd ) because of competition between cations at the root surface .
LeadNo subtypeCopper
In the present work , we exposed perennial ryegrass to nutrient solutions with two levels of Cd , Cu , Ni , Pb , and Zn ( 1 and 0.1 microM ) and with or without 30 mg / L of humic acid .
In a multicomponent system at metal concentrations of 1 microM , humic acid decreased Cu , Pb , and Fe adsorption at the root surface , but it increased Cd , Zn , and Mn adsorption at the root surface .
Complexation of cations such as Cu , Pb , and Fe with high affinity for ( dissolved ) organic matter may lead to increased uptake of cations with low affinity for organic matter ( Ni , Zn , and Cd ) because of competition between cations at the root surface .
CopperNo subtypenickel
In the present work , we exposed perennial ryegrass to nutrient solutions with two levels of Cd , Cu , Ni , Pb , and Zn ( 1 and 0.1 microM ) and with or without 30 mg / L of humic acid .
nickelNo subtypeCopper
In the present work , we exposed perennial ryegrass to nutrient solutions with two levels of Cd , Cu , Ni , Pb , and Zn ( 1 and 0.1 microM ) and with or without 30 mg / L of humic acid .
CopperNo subtypeIron
In a multicomponent system at metal concentrations of 1 microM , humic acid decreased Cu , Pb , and Fe adsorption at the root surface , but it increased Cd , Zn , and Mn adsorption at the root surface .
Complexation of cations such as Cu , Pb , and Fe with high affinity for ( dissolved ) organic matter may lead to increased uptake of cations with low affinity for organic matter ( Ni , Zn , and Cd ) because of competition between cations at the root surface .
IronNo subtypeCopper
Complexation of cations such as Cu , Pb , and Fe with high affinity for ( dissolved ) organic matter may lead to increased uptake of cations with low affinity for organic matter ( Ni , Zn , and Cd ) because of competition between cations at the root surface .
In a multicomponent system at metal concentrations of 1 microM , humic acid decreased Cu , Pb , and Fe adsorption at the root surface , but it increased Cd , Zn , and Mn adsorption at the root surface .
LeadNo subtypenickel
In the present work , we exposed perennial ryegrass to nutrient solutions with two levels of Cd , Cu , Ni , Pb , and Zn ( 1 and 0.1 microM ) and with or without 30 mg / L of humic acid .
nickelNo subtypeLead
In the present work , we exposed perennial ryegrass to nutrient solutions with two levels of Cd , Cu , Ni , Pb , and Zn ( 1 and 0.1 microM ) and with or without 30 mg / L of humic acid .
LeadNo subtypeIron
In a multicomponent system at metal concentrations of 1 microM , humic acid decreased Cu , Pb , and Fe adsorption at the root surface , but it increased Cd , Zn , and Mn adsorption at the root surface .
Complexation of cations such as Cu , Pb , and Fe with high affinity for ( dissolved ) organic matter may lead to increased uptake of cations with low affinity for organic matter ( Ni , Zn , and Cd ) because of competition between cations at the root surface .
IronNo subtypeLead
Complexation of cations such as Cu , Pb , and Fe with high affinity for ( dissolved ) organic matter may lead to increased uptake of cations with low affinity for organic matter ( Ni , Zn , and Cd ) because of competition between cations at the root surface .
In a multicomponent system at metal concentrations of 1 microM , humic acid decreased Cu , Pb , and Fe adsorption at the root surface , but it increased Cd , Zn , and Mn adsorption at the root surface .
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