Does Soil Organic Matter Chemistry Have Influence on the Sorption of Diuron?
نویسنده
چکیده
The influence of organic matter chemistry on the sorption of diuron to soils collected from a small field (2 ha) was investigated. Organic carbon-normalized sorption coefficients (K ), determined by batch OC sorption, varied between 405 and 598 L kg amongst 10 A11 horizons and between 547 and 975 L kg amongst 1 1 10 matching A12 horizons. In all cases K was greater for the A12 horizon than the corresponding A11 horizon OC by 27-81%. Organic matter chemistry of the A11 and A12 horizons was determined using solid-state C nuclear 13 magnetic resonance (NMR) spectroscopy. K was positively correlated with aryl C (r = 0.61, significance level OC 2 0.001) and negatively correlated with O-alkyl C (r = 0.88, significance level <0.001) as a single factor and 2 combination of both we also propose A index (r = 0.65, significance level 0.001). Little changes in soil 2 mineralogy across a very small field led to diminish organic matter and clay minerals interactions, allowing the effect of organic matter chemistry on K to be seen clearly. OC
منابع مشابه
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 amongst 10 A11 horizons, and between 547 and 975 Lkg amongst 10 matching A12 horizons. In all cases KOC was greater for the A12 horizon than the corre...
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