title: Phytomanagement of strongly acidic, saline eutrophic wetlands polluted by mine wastes: the influence of liming and Sarcocornia fruticosa on metals mobility.
abstract: The aim of this study was to assess the effectiveness of combining liming and vegetation for the phytomanagement of strongly acidic, saline eutrophic wetlands polluted by mine wastes. Simulated soil profiles were constructed and four treatments were assayed: without liming+without plant, without liming+with plant, with liming+without plant and with liming+with plant. The plant species was the halophyte Sarcocornia fruticosa. Three horizons were differentiated: A (never under water), C1 (alternating flooding-drying conditions) and C2 (always under water). The soluble Cd, Cu, Mn, Pb and Zn concentrations were measured regularly for 18 weeks and a sequential extraction procedure was applied at the end of the experiment. Liming was effective (between ∼70% and ∼100%) in reducing the soluble Zn, Cu and Pb. In contrast, soluble Mn and Cd increased with liming, especially in the treatment with liming+with plant, where the concentrations were 2-fold higher than in the non-limed treatments. The amendment increased the contents of Zn, Mn and Cd bound to potentially-mobilisable soil fractions at the expense of the most-environmentally-inert fractions. Hence, the combined use of liming and vegetation may increase the long-term environmental risk of metals solubilisation.
authors.affiliation: Departamento de Ciencia y Tecnología Agraria, Área de Edafología y Química Agrícola, E.T.S. de Ingeniería Agronómica, Universidad Politécnica de Cartagena, Paseo Alfonso XIII, 48, Cartagena, 30203 Murcia, Spain. Electronic address: nazaret.gonzalez@upct.es.
authors.forename: María Nazaret
authors.initials: MN
authors.lastname: González-Alcaraz
authors.affiliation: Departamento de Ciencia y Tecnología Agraria, Área de Edafología y Química Agrícola, E.T.S. de Ingeniería Agronómica, Universidad Politécnica de Cartagena, Paseo Alfonso XIII, 48, Cartagena, 30203 Murcia, Spain.
authors.forename: Héctor Miguel
authors.initials: HM
authors.lastname: Conesa
authors.affiliation: Departamento de Ciencia y Tecnología Agraria, Área de Edafología y Química Agrícola, E.T.S. de Ingeniería Agronómica, Universidad Politécnica de Cartagena, Paseo Alfonso XIII, 48, Cartagena, 30203 Murcia, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Álvarez-Rogel
mesh_terms: D027703:Amaranthaceae / Q000378:metabolism*; D017610:Calcium Compounds / Q000737:chemistry; D015386:Hazardous Substances / Q000032:analysis / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D013058:Mass Spectrometry; D008670:Metals / Q000032:analysis* / Q000378:metabolism; D008906:Mining; D010087:Oxides / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism; D053833:Wetlands
chemical_list: D017610:Calcium Compounds; D015386:Hazardous Substances; D007477:Ions; D008670:Metals; D010087:Oxides; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; C016538:lime