Kinetics of the dissolution of lead and zinc from rural atmospheric aerosols in freshwater and synthetic solutions.

Lancaster Environment Centre

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https://doi.org/10.1016/0043-1354(94)90241-0
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Keywords

Lead, zinc, aerosols, dissolution kinetics, freshwater, voltammetry, pH

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Kinetics of the dissolution of lead and zinc from rural atmospheric aerosols in freshwater and synthetic solutions. / Davison, W.; Arewgoda, C. M.; Hamilton-Taylor, J. et al.
In: Water Research, Vol. 28, No. 8, 08.1994, p. 1703-1709.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{532b079615d840369f874d4dce56dfa1,

title = "Kinetics of the dissolution of lead and zinc from rural atmospheric aerosols in freshwater and synthetic solutions.",

abstract = "The time-dependent release of lead and zinc from rural aerosol samples has been studied in four natural lake waters and various synthetic solutions spanning a pH range of 2.99–8.02. Automatic direct measurement of the released metals in the experimental vessel was performed at 1 min intervals using square wave anodic stripping voltammetry. Substantial initial release occurred within minutes. Further release was sometimes complete within 15 min but could be still continuing after 60 min depending on the nature of the aerosol and the pH of the solution. A maximum concentration of metal in solution observed after a few minutes for some aerosols was attributed to initial release followed by readsorption to the aerosol occurring as a result of a temporary pH minimum induced by the dissolution process. High concentrations (1.8 meq l−1) of calcium in solution stimulated release of lead and zinc, consistent with a surface exchange mechanism. The pH dependence of the percentage of zinc released was the same for synthetic and natural waters. Complete dissolution required more acid conditions than would be expected if release was entirely controlled by a simple, reversible exchange of ions at the particle surface. The pH dependence of lead release is more dependent on solution conditions.",

keywords = "Lead, zinc, aerosols, dissolution kinetics, freshwater, voltammetry, pH",

author = "W. Davison and Arewgoda, {C. M.} and J. Hamilton-Taylor and CN Hewitt",

year = "1994",

month = aug,

doi = "10.1016/0043-1354(94)90241-0",

language = "English",

volume = "28",

pages = "1703--1709",

journal = "Water Research",

publisher = "Elsevier Ltd",

number = "8",

}

RIS

TY - JOUR

T1 - Kinetics of the dissolution of lead and zinc from rural atmospheric aerosols in freshwater and synthetic solutions.

AU - Davison, W.

AU - Arewgoda, C. M.

AU - Hamilton-Taylor, J.

AU - Hewitt, CN

PY - 1994/8

Y1 - 1994/8

N2 - The time-dependent release of lead and zinc from rural aerosol samples has been studied in four natural lake waters and various synthetic solutions spanning a pH range of 2.99–8.02. Automatic direct measurement of the released metals in the experimental vessel was performed at 1 min intervals using square wave anodic stripping voltammetry. Substantial initial release occurred within minutes. Further release was sometimes complete within 15 min but could be still continuing after 60 min depending on the nature of the aerosol and the pH of the solution. A maximum concentration of metal in solution observed after a few minutes for some aerosols was attributed to initial release followed by readsorption to the aerosol occurring as a result of a temporary pH minimum induced by the dissolution process. High concentrations (1.8 meq l−1) of calcium in solution stimulated release of lead and zinc, consistent with a surface exchange mechanism. The pH dependence of the percentage of zinc released was the same for synthetic and natural waters. Complete dissolution required more acid conditions than would be expected if release was entirely controlled by a simple, reversible exchange of ions at the particle surface. The pH dependence of lead release is more dependent on solution conditions.

AB - The time-dependent release of lead and zinc from rural aerosol samples has been studied in four natural lake waters and various synthetic solutions spanning a pH range of 2.99–8.02. Automatic direct measurement of the released metals in the experimental vessel was performed at 1 min intervals using square wave anodic stripping voltammetry. Substantial initial release occurred within minutes. Further release was sometimes complete within 15 min but could be still continuing after 60 min depending on the nature of the aerosol and the pH of the solution. A maximum concentration of metal in solution observed after a few minutes for some aerosols was attributed to initial release followed by readsorption to the aerosol occurring as a result of a temporary pH minimum induced by the dissolution process. High concentrations (1.8 meq l−1) of calcium in solution stimulated release of lead and zinc, consistent with a surface exchange mechanism. The pH dependence of the percentage of zinc released was the same for synthetic and natural waters. Complete dissolution required more acid conditions than would be expected if release was entirely controlled by a simple, reversible exchange of ions at the particle surface. The pH dependence of lead release is more dependent on solution conditions.

KW - Lead

KW - zinc

KW - aerosols

KW - dissolution kinetics

KW - freshwater

KW - voltammetry

KW - pH

U2 - 10.1016/0043-1354(94)90241-0

DO - 10.1016/0043-1354(94)90241-0

M3 - Journal article

VL - 28

SP - 1703

EP - 1709

JO - Water Research

JF - Water Research

IS - 8

ER -

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