Nutrient removal capacity of wood residues for the Agro-environmental safety of ground and surface waters

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Nutrient removal capacity of wood residues for the Agro-environmental safety of ground and surface waters

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dc.creator Dumont, Paulo A.
dc.creator Chadwick, David. R.
dc.creator Robinson, Steve
dc.date 2014
dc.date.accessioned 2015-01-12T11:56:43Z
dc.date.available 2015-01-12T11:56:43Z
dc.date.issued 2015-01-12
dc.identifier.citation Sustainability, Agri, Food and Environmental Research, Vol.2, N°2, 47-67, 2014
dc.identifier.issn 0719-3726
dc.identifier.uri http://hdl.handle.net/10925/1622
dc.description.abstract The aim of this study was to determine the effectiveness of wood residues in the removal of nutrients (ammonium-N; NH4-N) from nutrient-rich (NH4-N) waters. The water holding capacity of the wood materials was also determined. Carried out at Rothamsted Research, North Wyke, UK, this controlled laboratory experiment tested two wood residues; in length, one being 1-2cm and the other from 150 μm (microns) to 9.5mm. Although a wide range of studies have shown the effectiveness and performance of various absorbent materials as animal beddings, such as straw (cereal straw), woodchip (sawdust, bark or wood shavings), bracken and rushes, only few have focused on the NH4-N sorption/desorption capacity. The depuration capacity of wood residues from nutrient-rich effluents such as those from cattle bedded on woodchip or straw will be controlled by processes such as sorption (adsorption-absorption) and desorption of nutrients. Studies have reported the nitrogen removal capacity of woodchip materials and biochar from woodchip as well as removal of NH4+-N from domestic and municipal wastewater, farm dirty water, landfill and industry effluents. These studies have observed that the mechanism of removal of nitrogen is by either increasing NO3--N removal form leachate by enhancing N2O losses via denitrification (biochar as carbon source for denitrifiers) or by decreasing NH4+-N in leachate through adsorption to negatively charged sites. Results showed that although the cation exchange capacity (CEC) and surface area (SA) are both fundamental properties of adsorbent materials, no correlation was found with CEC and adsorption or desorption. Nor did changes in pH appear to be sufficiently important to cause changes in CEC. For this reason, osmotic pressure appeared to be a more predominant parameter controlling processes of adsorption and desorption of NH4+-N in both wood residues. Thus, Wood residues high in NH4+-N should be avoided, as they could have an opposite effect in the adsorption of nutrients from nutrient-rich effluents. The results also showed that some wood residues (G30) had great capacity to adsorb NH4+-N to levels up to nearly 90% whilst demonstrating low desorption capacity of NH4+-N (less than 1%). These are ideal relevant features for an adsorbent material for the removal of nutrients (or heavy metals) from contaminated waters such us farm o industrial effluents, or for the depuration of eutrophic watercourses. This could help reduce the concentration of farm effluents making them more manageable, subsequently contributing towards the compliance of new environmental regulations.
dc.format PDF
dc.language.iso en
dc.rights This journal is licensed under a Creative Commons Attribution 3.0 License
dc.source Sustainability, Agri, Food and Environmental Research - SAFER
dc.subject Nutrientes
dc.subject Residuos madereros
dc.title Nutrient removal capacity of wood residues for the Agro-environmental safety of ground and surface waters
dc.type Artículo de Revista
uct.comunidad Recursos Naturales
uct.facultad Facultad de Recursos Naturales
uct.carrera Ingeniería en Recursos Naturales Renovables
uct.carrera Ingeniería Forestal
uct.catalogador rdv
uct.indizacion DOAJ
uct.indizacion REVISTA UCT

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