title: Environmental impact of unleaded gasolines in the bay of Cádiz (Spain).
abstract: Given the strategic situation of the José León de Carranza bridge, which spans the Bay of Cádiz (in the SW of Spain) and carries very heavy motor traffic, together with knowledge of the currents and tidal flows in the zone, we have used a technique of radioactive dating of sediments to study the temporal evolution presented by contamination from lead in the sediment column. This has allowed us to observe the environmental impact, in terms of the concentration of Pb in the sea bed sediments, that has been produced in the zone by the introduction of unleaded gasolines as substitutes for traditional automobile fuels that employ organic forms of tetra methyl lead as an antidetonant agent in the fuel.
authors.affiliation: Departamento de Física Aplicada, Centro Andaluz Superior de Estudios Marinos, Universidad de Cádiz. Campus Rio San Pedro, 11510, Puerto Real, Cádiz, Spain. rufino.ligero@uca.es
authors.forename: R A
authors.initials: RA
authors.lastname: Ligero
authors.forename: M
authors.initials: M
authors.lastname: Casas-Ruiz
authors.forename: M
authors.initials: M
authors.lastname: Barrera
authors.forename: F
authors.initials: F
authors.lastname: López-Aguayo
authors.forename: D
authors.initials: D
authors.lastname: Sales
authors.forename: D
authors.initials: D
authors.lastname: García
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D005742:Gasoline / Q000592:standards*; D019015:Geologic Sediments / Q000737:chemistry*; D007854:Lead / Q000032:analysis*; D011849:Radioactive Tracers; D013030:Spain; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005742:Gasoline; D011849:Radioactive Tracers; D014874:Water Pollutants, Chemical; D007854:Lead