"Acid extractable" metal concentrations in solid matrices: A comparison and evaluation of operationally defined extraction procedures and leaching tests.

"Acid extractable" metal concentrations in solid matrices: A comparison and evaluation of operationally defined extraction procedures and leaching tests. Research Abstract Details 

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"Acid extractable" metal concentrations in solid matrices: A comparison and evaluation of operationally defined extraction procedures and leaching tests. Abstract Text:

Different frequently used methods to determine the influence of acid conditions on heavy metal release from soils, sediments and waste materials, namely pH(stat) leaching tests and acid extractions with acetic acid (HOAc) (0.11M and 0.43M) and sodium acetate (NaOAc) (1M) were compared for 30 samples (soils, sediments and waste materials) with different physico-chemical properties and a different degree of contamination. However, no distinct relationship was found between physico-chemical sample characteristics, total element concentrations and acid-extractable metal concentrations in the presented dataset. pH played an important role in explaining the release of metals from the contaminated soils, sediments and waste materials. The pH-shift after extraction with the different acetic acid solutions (0.11M and 0.43M) was both explained by the initial pH of the sample and its acid neutralizing capacity. The pH of the NaOAc extract was well buffered and the release of elements from solid matrices by NaOAc was both the result of the complexation with acetate and pH (pH 5). Generally, a linear correlation was found between the amount of Zn and Cd extracted by 0.11M HOAc, 0.43M HOAc and 1M NaOAc. The amounts of Zn and Cd extracted with HOAc (0.11M and 0.43M) were comparable with amounts of respectively Zn and Cd released during pH(stat) leaching at pH 4. However, for Cu, Pb and As, it was often not possible to relate the results of a pH(stat) leaching test to the results of single extractions with acetic acid solutions.

"Acid extractable" metal concentrations in solid matrices: A comparison and evaluation of operationally defined extraction procedures and leaching tests. Publishing Authors By Initials

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"Acid extractable" metal concentrations in solid matrices: A comparison and evaluation of operationally defined extraction procedures and leaching tests. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Talanta

VOLUME: 75

Page Numbers: 1338-47

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ISSN: 1873-3573

DAY: 2

MONTH: 02

YEAR: 2008

"Acid extractable" metal concentrations in solid matrices: A comparison and evaluation of operationally defined extraction procedures and leaching tests. Information

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LANGUAGE: eng

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AFFILIATION: European University College Brussels, Centre for Corporate Sustainability, Stormstraat 2, 1000 Brussels, Belgium; Geologie, Katholieke Universiteit Leuven, Celestijnenlaan 200E, B-3001 Heverlee, Belgium.

Country: England

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MEDLINETA: Talanta

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