title: Metallic species in atmospheric particulate matter in Las Palmas de Gran Canaria.
abstract: In this work, we quantified the total, water-soluble and insoluble fractions of 12 metallic species (Na, Ca, K, Mg, Fe, Zn, Cr, Ni, Cu, Cd, Pb and Mn) present in total suspended particulates (TSP) in an urban area with heavy traffic (about 80 000 vehicles/day) of Las Palmas de Gran Canaria (Canary Islands). Experimental measurements were made from July to December 2003 on a total of 42 samples (7 per month). Particulate matter (TSP) was collected in fiber filters and high volume samplers. PM10 levels were estimated assuming the PM10 fraction is about 70% of all TSP. Total fractions was determined gravimetrically. Water-soluble fraction was extracted by sonication. Concentrations of metallic elements were analyzed by flame atomic absorption spectrophotometer. Temporal changes in the concentrations of the target elements were examined and a multivariate approach used to identify the primary sources for each species. Mean value for TSP is 71.92microg/m3. The water-soluble fraction consisted mainly of Na, Ca, Mg, and K. The insoluble fraction contained higher concentrations of all elements than the soluble except Na. In the water-soluble fraction, Na, K, Ca and Mg were found to come mainly from natural sources; Cr, Pb, Cd, Ni, Zn and Cu from anthropogenic sources.
authors.affiliation: Departamento de Ingeniería de Procesos, ETS de Ingenieros Industriales, ULPGC, Campus Universitario de Tafira, 35017 Las Palmas de Gran Canaria, Spain.
authors.forename: J López
authors.initials: JL
authors.lastname: Cancio
authors.forename: A Vera
authors.initials: AV
authors.lastname: Castellano
authors.forename: M Chaar
authors.initials: MC
authors.lastname: Hernández
authors.forename: R García
authors.initials: RG
authors.lastname: Bethencourt
authors.forename: E Macías
authors.initials: EM
authors.lastname: Ortega
mesh_terms: D000336:Aerosols; D000393:Air Pollutants / Q000032:analysis*; D008670:Metals / Q000032:analysis*; D052638:Particulate Matter / Q000032:analysis*; D012995:Solubility; D013030:Spain; D013054:Spectrophotometry, Atomic
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D008670:Metals; D052638:Particulate Matter