title: Time evolution of the general characteristics and Cu retention capacity in an acid soil amended with a bentonite winery waste.
abstract: The effect of bentonite waste added to a "poor" soil on its general characteristic and copper adsorption capacity was assessed. The soil was amended with different bentonite waste concentrations (0, 10, 20, 40 and 80 Mg ha(-1)) in laboratory pots, and different times of incubation of samples were tested (one day and one, four and eight months). The addition of bentonite waste increased the pH, organic matter content and phosphorus and potassium concentrations in the soil, being stable for P and K, whereas the organic matter decreased with time. Additionally, the copper sorption capacity of the soil and the energy of the Cu bonds increased with bentonite waste additions. However, the use of this type of waste in soil presented important drawbacks for waste dosages higher than 20 Mg ha(-1), such as an excessive increase of the soil pH and an increase of copper in the soil solution.
authors.affiliation: Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark. Electronic address: davidfc@uvigo.es.
authors.forename: David
authors.initials: D
authors.lastname: Fernández-Calviño
authors.affiliation: Área de Edafoloxía e Química Agrícola, Departamento de Bioloxía Vexetal e Ciencia do Solo, Universidade de Vigo, Facultade de Ciencias, 32004 Ourense, Spain.
authors.forename: Isabel
authors.initials: I
authors.lastname: Rodríguez-Salgado
authors.affiliation: Área de Edafoloxía e Química Agrícola, Departamento de Bioloxía Vexetal e Ciencia do Solo, Universidade de Vigo, Facultade de Ciencias, 32004 Ourense, Spain.
authors.forename: Paula
authors.initials: P
authors.lastname: Pérez-Rodríguez
authors.affiliation: Área de Edafoloxía e Química Agrícola, Departamento de Bioloxía Vexetal e Ciencia do Solo, Universidade de Vigo, Facultade de Ciencias, 32004 Ourense, Spain.
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Nóvoa-Muñoz
authors.affiliation: Área de Edafoloxía e Química Agrícola, Departamento de Bioloxía Vexetal e Ciencia do Solo, Universidade de Vigo, Facultade de Ciencias, 32004 Ourense, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Arias-Estévez
mesh_terms: D001546:Bentonite / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D013997:Time Factors; D014920:Wine
chemical_list: D007220:Industrial Waste; D012987:Soil; D012989:Soil Pollutants; D001546:Bentonite; D003300:Copper
keywords: Acid soil amendment; Bentonite waste addition; Cu mobilization; Cu retention; Waste reuse