5391: Sorption of dissolved organic C and P to agricultural top- and subsoil

Gjettermann, Birgitte; Styczen, Merete; Hansen, Søren; Borggaard, Ole K. and Hansen, Hans C.B. (2004) Sorption of dissolved organic C and P to agricultural top- and subsoil. Poster presented at ATV MØDE. VINTERMØDE OM JORD- OG GRUNDVANDSFORURERNING, VINGSTEDCENTRET, 9.-10. marts 2004.; Published in Bruun, Bente, Eds. ATV Jord og Grundvand. Vintermøde om jord- og grundvandsforurerening., page pp. 435-444.^**

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Summary

In order to study the mobility of dissolved organic carbon (DOC) and dissolved organic P (DOP) in soil, the pH-dependent sorption of dissolved organic matter to an agricultural top- and subsoil was investigated. In general, sorption isotherms had convex shapes and DOC and DOP sorption increased with time of reaction. There was a very pronounced effect of pH resulting in much higher sorption of DOC at pH 5 than at pH 7; actually extensive desorption was observed at pH 7 especially for the topsoil. Similar sorption patterns were observed for DOP, but they were not as pronounced as for DOC.

Document Language:	English
Keywords:	Dissolved organic C Dissolved organic P Initial Mass isotherm Sorption Desorption
Subject Areas:	Environmental aspects Soil > Nutrient turnover Soil > Soil quality > Soil biology Soil > Soil quality
Research affiliation:	Denmark > DARCOF II (2000-2005) > I.16 (OKOVAND) Regional groundwater protection by optimised organic farming systems Denmark > Other organizations
Funding Part:	5-25%
Orgprints ID Number:	5391
Contact:	Gjettermann, PhD. Student Birgitte
Deposited On:	05 September 2005
EPrint Type:	Conference poster
Published?:	Published
Online at:	http://www.atv-jord-grundvand.dk/
Peer Review Status:	Not peer-reviewed

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