Authors:
S. Tejeda Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales Apartado Postal 18-1027, México D.F., C.P. 11801, México

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G. Zarazúa-Ortega Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales Apartado Postal 18-1027, México D.F., C.P. 11801, México

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P. Avila-Pérez Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales Apartado Postal 18-1027, México D.F., C.P. 11801, México

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A. García-Mejía Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales Apartado Postal 18-1027, México D.F., C.P. 11801, México

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L. Carapia-Morales Instituto Nacional de Investigaciones Nucleares, Gerencia de Ciencias Ambientales Apartado Postal 18-1027, México D.F., C.P. 11801, México

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C. Diaz-Delgado Centro Interamericano de Recursos del Agua, UAEM Cerro de Coatepec s/n Toluca, México

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Summary  

The Lerma is one of the most important rivers of Mexico, where it drains highly populated and industrialized regions. The concentration of six major and trace elements: titanium, manganese, iron, zinc, copper and lead in the surface sediments of the upper course of Lerma river was investigated, in order to identify its distribution along the river and to recognize the principal sites of pollution. The surface sediment samples were collected at 8 sites distributed following the stream flow direction of the river. Major and trace elements concentrations were determined by energy dispersive X-ray spectrometry. The results show that the metal concentrations in the sediments decrease in the sequence: Fe > Ti > Mn > Zn > Cu > Pb. Concentration of Fe, Mn and Ti were significantly higher than the other metals in site 8,200 meters downstream the Alzate Dam. The high concentrations and spatial variations of Zn, Cu and Pb in the middle sites of the upper course of the Lerma River indicate that the river pollution is probably associated with urban and industrial discharges.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)