Glued forever: incomplete dispersion hampers POM-MAOM fractionation in soils with high SOC and metal (hydr)oxide content

Geoderma 2026 Open access

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Authors: M.S. Breure, A. J. van der Sluijs, G.J. Koorneef, A-R. Salonen, M.M. Pulleman, M. Hagens, W.D.C. Schenkeveld, D.P. Di Lonardo
DOI: 10.1016/j.geoderma.2026.117704
Cited by: 2
References: 68

Abstract

• Soil dispersion with sodium hexametaphosphate (SHMP) was effective for most soils. • Soil organic carbon and metal (hydr)oxides hamper soil dispersion in SHMP. • Soil texture influenced completeness of dispersion. • Residual moisture content of 40 °C dried soils can indicate incomplete dispersion. • Incomplete dispersion was poorly predicted in sodium and/or magnesium rich soils. Fractionation of soil organic carbon (SOC) into particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) has contributed to our understanding of soil carbon cycling. Size fractionation following soil dispersion with sodium hexametaphosphate (SHMP) is a common method to separate POC (>50 µm) from MAOC (

Fields of Study & Subjects

Soil Carbon and Nitrogen Dynamics Heavy metals in environment Soil and Water Nutrient Dynamics

Publication details

Journal / source
Geoderma
Publisher
Elsevier BV
Volume
467
Pages
117704–117704
Publication date
18 February 2026
Language
EN