Role Of The Chemistry Of Soil Organic Matter On The Sorption Of Diuron

The influence of organic matter chemistry on the sorption of diuron to soils collected from a small (2 ha) field was investigated. Organic carbon-normalized sorption coefficients (KOC), determined by batch sorption, varied between 405 and 598 Lkg-1 amongst 10 A11 horizons, and between 547 and 975 Lk...

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Veröffentlicht in:	WIT Transactions on Ecology and the Environment 2008-01, Vol.110, p.327
Hauptverfasser:	Ahangar, A G, Smernik, R J, Kookana, R S
Format:	Artikel
Sprache:	eng
Schlagworte:	Aromatic compounds Clay minerals Diuron Environmental protection Hazardous materials Horizon Magnetic resonance spectroscopy Mineralogy NMR NMR spectroscopy Nuclear magnetic resonance Organic carbon Organic chemistry Organic matter Organic soils Pesticides Soil chemistry Soil investigations Soil mineralogy Soil organic matter Sorption Spectroscopy Urea
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Zusammenfassung:	The influence of organic matter chemistry on the sorption of diuron to soils collected from a small (2 ha) field was investigated. Organic carbon-normalized sorption coefficients (KOC), determined by batch sorption, varied between 405 and 598 Lkg-1 amongst 10 A11 horizons, and between 547 and 975 Lkg-1 amongst 10 matching A12 horizons. In all cases KOC was greater for the A12 horizon than the corresponding A11 horizon by 27–81%. Organic matter chemistry of the A11 and A12 horizons was determined using solid-state 13C nuclear magnetic resonance (NMR) spectroscopy. KOC was positively correlated with aryl C (r2 = 0.61, significance level 0.001) and negatively correlated with O-alkyl C (r2 = 0.88, significance level
ISSN:	1746-448X 1743-3541
DOI:	10.2495/ETOX080341