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Use of bark or wood chips resulted in elevated Cd, Zn or Mn concentrations in the compost. Cd concentrations in the compost may exceed legal criteria, mainly due to the use of wood chips or bark of tree species with high Cd uptake. Based on sequential extractions, we measured that Cd and Zn were mainly bound in the reducible fraction, while Mn was found in the easily available fraction. Even at higher total Cd and Zn concentrations in the composts, the results of the sequential extractions showed a small fraction which is present in the exchangeable fraction, which indicates a low environmental risk when applying these composts. Higher Cd concentrations in compost due to the use of bark or wood chips were not found to result in higher risk for Cd leaching. The results of pH-stat experiments illustrated that only a strong pH decline in the compost resulted in higher availability of Cd, Zn and Mn. The amount of soil in the feedstock material or unintentionally added during the composting process affected total and available concentrations for Mn.
|Titel||ISHS Acta Horticulturae 1018: Ist International Symposium on Organic Matter Management and Compost Use in Horticulture|
|ISBN van geprinte versie||978-94-62610-04-0|
|Publicatiestatus||Gepubliceerd - 2014|
|Evenement||ISHS International Symposium on Organic Matter Management and Compost Use in Horticulture - Adelaide, Australië|
Duur: 4-apr-2011 → 7-apr-2011
VingerafdrukBekijk de onderzoeksthema's van 'Effect of feedstock, organic matter content and pH on Cd, Zn and Mn availability in farm compost based on bark and wood chips'. Samen vormen ze een unieke vingerafdruk.
- 1 Afgerond
GENESYS-PHD2: Marktgerichte ontwikkeling en introductie van innovaties: Systeeminnovatie rond valorisatie van nevenstromen
1/10/12 → 30/09/16