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ISO 12782-1:2012

(Main)

Soil quality — Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials — Part 1: Extraction of amorphous iron oxides and hydroxides with ascorbic acid

Soil quality — Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials — Part 1: Extraction of amorphous iron oxides and hydroxides with ascorbic acid

ISO 12782-1:2012 specifies the determination of the content of "reactive" iron in the form of amorphous iron oxides and hydroxides in soil and other materials by extraction with ascorbic acid. Other materials also include waste. The content of "reactive" iron can be used as input in geochemical models to represent the content of amorphous iron (hydr)oxides.

Qualité du sol — Paramètres pour la modélisation géochimique de la lixiviation et de la spéciation des constituants des sols et des matériaux — Partie 1: Extraction des oxydes et hydroxydes de fer amorphe à l'acide ascorbique

L'ISO 12782-1:2012 spécifie la détermination de la teneur en fer «réactif» présent sous forme d'oxydes et d'hydroxydes de fer amorphe dans le sol et autres matériaux par extraction à l'acide ascorbique. Les autres matériaux incluent également les déchets. La teneur en fer «réactif» peut être utilisée comme une donnée d'entrée dans les modèles géochimiques pour représenter la teneur en oxydes et hydroxydes de fer amorphe.

General Information

Status
Published
Publication Date
31-May-2012
ICS
13.080.05 - Examination of soils in general
Technical Committee
ISO/TC 190/SC 7 - Impact assessment
Drafting Committee
ISO/TC 190/SC 7/WG 6 - Transfer and mobility of components
Current Stage
9093 - International Standard confirmed
Completion Date
16-Oct-2023
Ref Project

Relations

Consolidates
ISO 4404-2:2003 - Petroleum and related products — Determination of the corrosion resistance of fire-resistant hydraulic fluids — Part 2: Non-aqueous fluids
Effective Date
06-Jun-2022

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ISO 12782-1:2012 - Soil quality -- Parameters for geochemical modelling of leaching and speciation of constituents in soils and materialsISO 12782-1:2012 - Soil quality -- Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials
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ISO 12782-1:2012 - Qualité du sol -- Parametres pour la modélisation géochimique de la lixiviation et de la spéciation des constituants des sols et des matériauxISO 12782-1:2012 - Qualité du sol -- Parametres pour la modélisation géochimique de la lixiviation et de la spéciation des constituants des sols et des matériaux
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INTERNATIONAL ISO
STANDARD 12782-1
First edition
2012-06-01
Soil quality — Parameters for geochemical
modelling of leaching and speciation of
constituents in soils and materials —
Part 1:
Extraction of amorphous iron oxides and
hydroxides with ascorbic acid
Qualité du sol — Paramètres pour la modélisation géochimique de la
lixiviation et de la spéciation des constituants des sols et des matériaux —
Partie 1: Extraction des oxydes et hydroxydes de fer amorphe à
l’acide ascorbique
Reference number
ISO 12782-1:2012(E)
©
ISO 2012

---------------------- Page: 1 ----------------------
ISO 12782-1:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 12782-1:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 12782-1 was prepared by Technical Committee ISO/TC 190, Soil quality, Subcommittee SC 7, Soil and
site assessment.
ISO 12782 consists of the following parts, under the general title Soil quality — Parameters for geochemical
modelling of leaching and speciation of constituents in soils and materials:
— Part 1: Extraction of amorphous iron oxides and hydroxides with ascorbic acid
— Part 2: Extraction of crystalline iron oxides and hydroxides with dithionite
— Part 3: Extraction of aluminium oxides and hydroxides with ammonium oxalate/oxalic acid
— Part 4: Extraction of humic substances from solid samples
— Part 5: Extraction of humic substances from aqueous samples
© ISO 2012 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 12782-1:2012(E)
Introduction
In addition to leaching procedures for subsequent chemical and ecotoxicological testing of soil and other
materials including waste, predictive models are becoming indispensable tools in the environmental risk
assessment of these materials. Models are particularly required when the results of laboratory leaching tests
are to be translated to specific scenarios in the field, with regard to assessing the risks of both contaminant
migration and bioavailability.
In the past few years, geochemical models have been shown to be valuable tools to be combined with the
data obtained from characterization leaching standards, such as pH-dependence and percolation tests. These
models have the advantage of being based on fundamental thermodynamic parameters that have general
validity. In order to enable extrapolation of laboratory leaching data to the mobility and/or bioavailability of
a constituent in a specific field scenario, these models require additional input parameters for specific soil
properties (see Figure 1).
Key
1 experiment
2 geochemical speciation modelling
3 available metal concentration
4 dissolved humic substances
5 reactive (solid) surfaces
6 database with stability constants
7 computer program
8 assumptions
Figure 1 — Relationships between experimental data, as obtained from laboratory
leaching/extraction tests, and geochemical modelling of the speciation of a heavy metal
in the environment (modified after M. Gfeller & R. Schulin, ETH, Zürich)
Characterization leaching standards provide information on the concentrations of the contaminant of interest as
a function of, in particular, pH and liquid/solid (L/S) ratio. In addition,
...

NORME ISO
INTERNATIONALE 12782-1
Première édition
2012-06-01
Qualité du sol — Paramètres pour
la modélisation géochimique de la
lixiviation et de la spéciation des
constituants des sols et des matériaux —
Partie 1:
Extraction des oxydes et hydroxydes de
fer amorphe à l’acide ascorbique
Soil quality — Parameters for geochemical modelling of leaching and
speciation of constituents in soils and materials —
Part 1: Extraction of amorphous iron oxides and hydroxides with
ascorbic acid
Numéro de référence
ISO 12782-1:2012(F)
©
ISO 2012

---------------------- Page: 1 ----------------------
ISO 12782-1:2012(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2012
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous
quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l’accord écrit
de l’ISO à l’adresse ci-après ou du comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Publié en Suisse
ii © ISO 2012 – Tous droits réservés

---------------------- Page: 2 ----------------------
ISO 12782-1:2012(F)
Sommaire Page
Avant-propos .iv
Introduction . v
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 2
4 Principe . 3
5 Appareillage . 3
6 Réactifs . 4
7 Prétraitement de l’échantillon . 4
7.1 Taille de l’échantillon . 4
7.2 Réduction granulométrique . 4
7.3 Détermination de la teneur en eau . 5
8 Mode opératoire . 5
8.1 Préparation de la solution d’extraction . 5
8.2 Extraction . 6
8.3 Dosage analytique . 6
9 Calcul . 6
10 Expression des résultats . 6
11 Rapport d’essai . 6
Annexe A (informative) Conditions concernant la centrifugation . 8
Bibliographie . 11
© ISO 2012 – Tous droits réservés iii

---------------------- Page: 3 ----------------------
ISO 12782-1:2012(F)
Avant-propos
L’ISO (Organisation internationale d
...

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