EN ISO 12782-4:2012 PDF

Name: EN ISO 12782-4:2012 — Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials - Part 4: Extraction of humic substances from solid samples (ISO 12782-4:2012)
SKU: EN ISO 12782-4:2012
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Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials - Part 4: Extraction of humic substances from solid samples (ISO 12782-4:2012)

Название (английский):

EN ISO 12782-4:2012

Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials - Part 4: Extraction of humic substances from solid samples (ISO 12782-4:2012)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 32
Дата публикации:: 1 июня 2012 г.
Издание:: CEN EN 12782 edition 1 version 1
ICS:: 13.080.05

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Описание (английский):

ISO 12782-4:2012 specifies a procedure to determine the concentration of humic substances in soil or other materials. Other materials also include waste. The content of humic substances can be used as input in geochemical models.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 12782-4:2012 - Soil quality: Parameters for geochemical modelling of leaching and speciation - Part 4 specifies a standardized procedure to extract and quantify humic substances from solid samples (soils, waste and other materials). The extracted humic acid (HA), fulvic acid (FA) and related organic carbon fractions are intended as input parameters for geochemical modelling of leaching and speciation, supporting environmental risk assessment and predictive modelling of contaminant mobility and bioavailability.

Key topics and technical requirements

Scope and purpose: Define a selective extraction method for reactive organic surfaces (humic/fulvic substances) that can be used with geochemical models.

Sample preparation: Guidance on sample size, particle size reduction, determination of dry residue and selection of test portion to ensure representative solid samples.

Fractionation procedure: Isolation and purification steps based on conventional IHSS methods, including resin-based fractionation (e.g., DAX-8 resin preparation) and separation into HA, FA, hydrophilic organic carbon (Hy) and hydrophobic neutral organic carbon (HON).

Analytical workflow: Eluate treatment and storage, analytical determination methods, blank testing and calculation procedures for reporting concentrations in solid samples.

Data expression & quality: Calculation corrections, expression of results, test reporting requirements and performance characteristics (validation, centrifugation conditions).

Documentation: Annexes with schematic fractionation, validation data and procedural details to support reproducibility.

Applications and users

Primary use: Provide reliable concentrations of humic substances as input parameters for geochemical speciation and leaching models used to predict contaminant mobility, retention and bioavailability.

Who uses it:

Environmental and soil laboratories performing characterization leaching tests
Geochemists and modelers integrating organic ligand concentrations into speciation models
Environmental consultants and regulators conducting risk assessments
Research groups studying soil organic matter binding and contaminant partitioning
Waste and materials managers assessing leaching from ashes, slags, recycled aggregates and amended soils

Practical benefits: Standardized extraction improves comparability of humic/fulvic data across studies, enabling more accurate modelling of metal complexation, sorption and transport in soils and material matrices.

Related standards

EN ISO 12782 is a series addressing reactive surfaces for geochemical modelling:

Part 1: Extraction of amorphous iron oxides/hydroxides

Part 2: Extraction of crystalline iron oxides/hydroxides

Part 3: Extraction of aluminium oxides/hydroxides

Part 4: Extraction of humic substances (this document)

Part 5: Extraction of humic substances from aqueous samples

Keywords: EN ISO 12782-4, humic substances extraction, humic acid, fulvic acid, soil quality, geochemical modelling, leaching, speciation, reactive organic surfaces.

EN ISO 12782-4:2012 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 12782-4:2012

Soil quality — Parameters for geochemical modelling of leaching and speciation of constituents in soils and m…

BS EN ISO 12782-5:2012

Soil quality. Parameters for geochemical modelling of leaching and speciation of constituents in soils and ma…

SIST EN ISO 12782-4:2013

Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and m…