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© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

The Lake of Texcoco is a closed basin with soils that confer salinity, conductivity, and alkalinity to it. It has undergone a reduction in size, incorporation of wastewater, and short-term desiccation, and includes temporary wetlands interconnected during the rainy season, some of which receive treated wastewater. Sediments contain metals, thus affecting water quality. Five artificial lakes were studied, and 12 metals (As, Ba, Cd, Cu, Cr, Fe, Mg, Mn, Hg, Ni, Pb, and Zn) were monitored bimonthly in water and sediments from June 2015 to March 2018. The Metal Pollution Index (MPI) and the Distribution Coefficient (Kd) were computed. Fe and Cd were the most and least stable metals in sediments, respectively (mean Log(Kd) = 4.24 and 2.079). Based on Log(Kd), metals were ranked as Fe > Mn > Zn > Cu > Mg > Cr > Ni > Ba > Pb > Hg > As > Cd. Log(Kd) values < 3 and > 5 indicate that metals occur mainly in water and sediments, respectively. The Mean Distribution Coefficient Log(Kd MPI) is a novel index proposed to assess ecological risk from metals in a water body. This index allows determining the phase (liquid or solid) where metals predominate, negatively affecting either free-swimming or benthic organisms. Log(Kd MPI) values indicated that metals occur primarily in the liquid phase in all lakes studied.

Details

Title
Distribution Coefficient and Metal Pollution Index in Water and Sediments: Proposal of a New Index for Ecological Risk Assessment of Metals
Author
Jacinto Elías Sedeño-Díaz 1 ; López-López, Eugenia 2   VIAFID ORCID Logo  ; Mendoza-Martínez, Erick 2 ; Rodríguez-Romero, Alexis Joseph 2   VIAFID ORCID Logo  ; Morales-García, Sandra Soledad 3   VIAFID ORCID Logo 

 Instituto Politécnico Nacional, Coordinación Politécnica para la Sustentabilidad, Av. IPN, esq. Wilfrido Massieu, Col. Zacatenco, Ciudad de México C.P. 07738, Mexico 
 Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas. Prol. de Carpio y Plan de Ayala s/n. Col. Sto. Tomás, Ciudad de México C.P. 11340, Mexico; [email protected] (E.L.-L.); [email protected] (E.M.-M.); [email protected] (A.J.R.-R.) 
 Instituto Politécnico Nacional, Centro Mexicano para la Producción más Limpia, Av. Acueducto s/n, Ticomán, Gustavo A. Madero, Ciudad de México C.P. 07340, Mexico; [email protected] 
First page
29
Publication year
2020
Publication date
2020
Publisher
MDPI AG
e-ISSN
20734441
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2550500656
Copyright
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.