title: Influence of population density on the concentration and speciation of metals in the soil and street dust from urban areas.
abstract: Street dust and soil from high, medium and low populated cities and natural area were analysed for selected physical-chemical properties, total and chemical speciation of Zn, Pb, Cu, Cr, Cd, Co, Ni to understand the influence of human activities on metal accumulation and mobility in the environment. The pH, salinity, carbonates and organic carbon contents were similar between soil and dust from the same city. Population density increases dust/soil salinity but has no influence on metals concentrations in soils. Increases in metal concentrations with population density were observed in dusts. Cu, Zn, Pb, Cr can be mobilized more easily from dust compared to the soil. In addition, population density increase the percentage of Pb and Zn associated to reducible and carbonate phase in the dust. The behaviour of metals except Cd in soil is mainly affected by physico-chemical properties, while total metal influenced the speciation except Cr and Ni in dusts.
authors.affiliation: Sustainable Use, Management and Reclamation of Soil and Water Research Group. ETSIA. Universidad Politécnica de Cartagena. Paseo Alfonso XIII, 52, 30230 Cartagena, Spain. Electronic address: ja.acosta@upct.es.
authors.forename: J A
authors.initials: JA
authors.lastname: Acosta
authors.affiliation: Sustainable Use, Management and Reclamation of Soil and Water Research Group. ETSIA. Universidad Politécnica de Cartagena. Paseo Alfonso XIII, 52, 30230 Cartagena, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Gabarrón
authors.affiliation: Sustainable Use, Management and Reclamation of Soil and Water Research Group. ETSIA. Universidad Politécnica de Cartagena. Paseo Alfonso XIII, 52, 30230 Cartagena, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Faz
authors.affiliation: Sustainable Use, Management and Reclamation of Soil and Water Research Group. ETSIA. Universidad Politécnica de Cartagena. Paseo Alfonso XIII, 52, 30230 Cartagena, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Martínez-Martínez
authors.affiliation: Sustainable Use, Management and Reclamation of Soil and Water Research Group. ETSIA. Universidad Politécnica de Cartagena. Paseo Alfonso XIII, 52, 30230 Cartagena, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Zornoza
authors.affiliation: Environmental Science Program, University of Northern British Columbia, Prince George BCV2N 4Z9, Canada.
authors.forename: J M
authors.initials: JM
authors.lastname: Arocena
mesh_terms: D002947:Cities; D004391:Dust / Q000032:analysis*; D004784:Environmental Monitoring; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis*; D011156:Population Density; D012987:Soil; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D004391:Dust; D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants
keywords: Chemical speciation; Heavy metals; Population density; Street dust; Urban soil