Complexation of lead in model solutions of humic acid: Heterogeneity and effects of competition with copper, nickel, and zinc

Ismail I. Fasfous; C. L. Chakrabarti; John Murimboh; Tahir Yapici

doi:10.1071/EN06022

Complexation of lead in model solutions of humic acid: Heterogeneity and effects of competition with copper, nickel, and zinc

Ismail I. Fasfous, C. L. Chakrabarti^*, John Murimboh, Tahir Yapici

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Physicochemical heterogeneity of a well characterized humic acid (HA) in its complexation with a trace metal lead in model solutions was investigated using pseudo-polarography at a stationary mercury drop electrode, and the differential equilibrium function (DEF) of Pb(ii)?HA complexes was determined. The complexation of Pb(ii) by HA was determined by taking into account the dependence of the strength of the binding on the metal (Pb) loading. Also investigated were the effects of competition of the trace metals copper, nickel, and zinc on the DEF of Pb(ii)?HA complexes in model solutions. The results showed that these trace metals competed with trace metal lead for binding by HA even when present at the same concentrations as that of lead.

Original language	English (US)
Pages (from-to)	276-285
Number of pages	10
Journal	Environmental Chemistry
Volume	3
Issue number	4
DOIs	https://doi.org/10.1071/EN06022
State	Published - 2006
Externally published	Yes

Keywords

Competition
Humic substances
Pseudo-polarography
Speciation
Trace elements

ASJC Scopus subject areas

Chemistry (miscellaneous)
Environmental Chemistry
Geochemistry and Petrology

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title = "Complexation of lead in model solutions of humic acid: Heterogeneity and effects of competition with copper, nickel, and zinc",

abstract = "Physicochemical heterogeneity of a well characterized humic acid (HA) in its complexation with a trace metal lead in model solutions was investigated using pseudo-polarography at a stationary mercury drop electrode, and the differential equilibrium function (DEF) of Pb(ii)?HA complexes was determined. The complexation of Pb(ii) by HA was determined by taking into account the dependence of the strength of the binding on the metal (Pb) loading. Also investigated were the effects of competition of the trace metals copper, nickel, and zinc on the DEF of Pb(ii)?HA complexes in model solutions. The results showed that these trace metals competed with trace metal lead for binding by HA even when present at the same concentrations as that of lead.",

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author = "Fasfous, {Ismail I.} and Chakrabarti, {C. L.} and John Murimboh and Tahir Yapici",

year = "2006",

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volume = "3",

pages = "276--285",

journal = "Environmental Chemistry",

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TY - JOUR

T1 - Complexation of lead in model solutions of humic acid

T2 - Heterogeneity and effects of competition with copper, nickel, and zinc

AU - Fasfous, Ismail I.

AU - Chakrabarti, C. L.

AU - Murimboh, John

AU - Yapici, Tahir

PY - 2006

Y1 - 2006

N2 - Physicochemical heterogeneity of a well characterized humic acid (HA) in its complexation with a trace metal lead in model solutions was investigated using pseudo-polarography at a stationary mercury drop electrode, and the differential equilibrium function (DEF) of Pb(ii)?HA complexes was determined. The complexation of Pb(ii) by HA was determined by taking into account the dependence of the strength of the binding on the metal (Pb) loading. Also investigated were the effects of competition of the trace metals copper, nickel, and zinc on the DEF of Pb(ii)?HA complexes in model solutions. The results showed that these trace metals competed with trace metal lead for binding by HA even when present at the same concentrations as that of lead.

AB - Physicochemical heterogeneity of a well characterized humic acid (HA) in its complexation with a trace metal lead in model solutions was investigated using pseudo-polarography at a stationary mercury drop electrode, and the differential equilibrium function (DEF) of Pb(ii)?HA complexes was determined. The complexation of Pb(ii) by HA was determined by taking into account the dependence of the strength of the binding on the metal (Pb) loading. Also investigated were the effects of competition of the trace metals copper, nickel, and zinc on the DEF of Pb(ii)?HA complexes in model solutions. The results showed that these trace metals competed with trace metal lead for binding by HA even when present at the same concentrations as that of lead.

KW - Competition

KW - Humic substances

KW - Pseudo-polarography

KW - Speciation

KW - Trace elements

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DO - 10.1071/EN06022

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AN - SCOPUS:33748428030

SN - 1448-2517

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SP - 276

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JO - Environmental Chemistry

JF - Environmental Chemistry

IS - 4

ER -

Complexation of lead in model solutions of humic acid: Heterogeneity and effects of competition with copper, nickel, and zinc

Abstract

Keywords

ASJC Scopus subject areas

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