title: Geographic distribution of arsenic and trace metals in lotic ecosystems of the Pampa Plain, Argentina.
abstract: In this paper, the geographic distribution of arsenic and other trace elements in surface waters of 39 lotic ecosystems of central Argentina was evaluated. Manganese and arsenic were the most conspicuous elements, being present in 82% and 59% of the sampled ecosystems of this region, respectively. As concentration averaged 113.69 μg L⁻¹ varying between 55 and 198 μg L⁻¹, other trace elements were hardly detected or not detected at all. It was remarkable the absence of detectable concentrations of anthropogenically derived metals as lead (Pb) and cadmium (Cd).
authors.affiliation: Centro de Estudios Transdisciplinarios del Agua (CETA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Av. Chorroarín 280, CP1427 Buenos Aires, Argentina.
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Rosso
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Troncoso
authors.forename: Alicia
authors.initials: A
authors.lastname: Fernández Cirelli
mesh_terms: D001118:Argentina; D001151:Arsenic / Q000032:analysis*; D002104:Cadmium / Q000032:analysis; D017753:Ecosystem; D004777:Environment; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry; D007854:Lead / Q000032:analysis; D008670:Metals / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical; D002104:Cadmium; D007854:Lead; D001151:Arsenic