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

dc.date2014
dc.date.accessioned2015-01-12T11:56:43Z
dc.date.available2015-01-12T11:56:43Z
dc.date.issued2015-01-12
dc.description.abstractThe 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.es_ES
dc.formatPDFes_ES
dc.identifier.citationSustainability, Agri, Food and Environmental Research, Vol.2, N°2, 47-67, 2014
dc.identifier.issn0719-3726es_ES
dc.identifier.urihttps://hdl.handle.net/10925/1622
dc.language.isoenes_ES
dc.rightsThis journal is licensed under a Creative Commons Attribution 3.0 Licensees_ES
dc.sourceSustainability, Agri, Food and Environmental Research - SAFERes_ES
dc.subjectNutrienteses_ES
dc.subjectResiduos madereroses_ES
dc.titleNutrient removal capacity of wood residues for the Agro-environmental safety of ground and surface waterses_ES
dc.typeArtículo de Revistaes_ES
uct.carreraIngeniería en Recursos Naturales Renovableses_ES
uct.carreraIngeniería Forestales_ES
uct.catalogadorrdves_ES
uct.comunidadRecursos Naturaleses_ES
uct.facultadFacultad de Recursos Naturaleses_ES
uct.indizacionDOAJes_ES
uct.indizacionREVISTA UCTes_ES
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