title: Improving the mining soil quality for a vegetation cover after addition of sewage sludges: inorganic ions and low-molecular-weight organic acids in the soil solution.
abstract: We assessed the effects of applying stabilized sewage sludge (SSL) and composted sewage sludge (CLV), at 5 and 10% to an acid mining soil. Limed soil (NCL) amended or not with SSL and CLV was incubated for 47 days. We studied the cations and organic and inorganic anions in the soil solution by means of ion chromatography. Liming led to big increases in Ca(2+) and SO4(2-) and to significant decreases in K(+), Mg(2+), NH4(+) and NO3(-). Addition of both organic amendments increased some cations (NH4(+), K(+), Mg(2+), Na(+)) and anions (Cl(-), NO3(-) only with CLV and PO4(3-) only with SSL) and provided a greater amount of low-molecular-weight organic acids (LMWOAs) (SSL more than CLV). Incubation led to decreases in all cations, particularly remarkable for Ca(2+) and Mg(2+) in SSL-10. A decrease in NH4(+) was associated with variations in NO2(-) and NO3(-) resulting from nitrification reactions. During incubation the LMWOAs content tended to decrease similarly to the cations, especially in SSL-10. Chemometric tools revealed a clear discrimination between SSL, CLV and NCL. Furthermore, treatment effects depended upon dose, mainly in SSL. Amendment nature and dose affect the quality of a mining soil and improve conditions for plant establishment.
authors.affiliation: Instituto Andaluz de Ciencias de la Tierra, IACT (CSIC-UGR), Avda. de las Palmeras, 4, 18100 Armilla, Granada, Spain; Associated Unity "Integral Research of Terrestrial Systems" (CSIC-USE), Sevilla, Spain.
authors.forename: Aránzazu
authors.initials: A
authors.lastname: Peña
authors.affiliation: Instituto Andaluz de Ciencias de la Tierra, IACT (CSIC-UGR), Avda. de las Palmeras, 4, 18100 Armilla, Granada, Spain; Associated Unity "Integral Research of Terrestrial Systems" (CSIC-USE), Sevilla, Spain.
authors.forename: Mª Dolores
authors.initials: MD
authors.lastname: Mingorance
authors.affiliation: Department of Analytical Chemistry, University of Sevilla (USE), Faculty of Chemistry, C. Prof. García González, 1, 41012 Sevilla, Spain.
authors.forename: Ignacio
authors.initials: I
authors.lastname: Guzmán-Carrizosa
authors.affiliation: Department of Analytical Chemistry, University of Sevilla (USE), Faculty of Chemistry, C. Prof. García González, 1, 41012 Sevilla, Spain; Associated Unity "Integral Research of Terrestrial Systems" (CSIC-USE), Sevilla, Spain. Electronic address: anjose@us.es.
authors.forename: Antonio J
authors.initials: AJ
authors.lastname: Fernández-Espinosa
mesh_terms: D003247:Conservation of Natural Resources; D006801:Humans; D007287:Inorganic Chemicals / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D008906:Mining; D009930:Organic Chemicals / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D014197:Trees
chemical_list: D007287:Inorganic Chemicals; D007477:Ions; D009930:Organic Chemicals; D012722:Sewage; D012987:Soil
keywords: Ion chromatography; Liming; Mining soil; Multivariate analyses; Organic acids; Organic amendments