Bioconcentration of Lead and x-ray Microanalysis with SEM in the Freshwater Rotifer Lecane quadridentata (Rotifera: Monogononta)
Jesús Alvarado-Flores1, Roberto Rico-Martínez2
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1Catedrático CONACYT / Unidad de Ciencias del Agua, Centro de Investigación Científica de Yucatán
A.C. Cancún, Quintana Roo, México
2Universidad Autónoma de Aguascalientes, Centro de Ciencias Básicas, Departamento de Química,
Avenida Universidad 940, Aguascalientes, Ags., CP 20131, México
Submission date: 2016-10-06
Final revision date: 2016-11-23
Acceptance date: 2016-11-23
Online publication date: 2017-10-10
Publication date: 2017-11-07
Pol. J. Environ. Stud. 2017;26(6):2869-2872
We studied the accumulation of lead as Pb(NO3)2 in the freshwater rotifer Lecane quadridentata using Leadmium Green and x-ray microanalysis by energy dispersion. The results indicate that lead is bioaccumulated in great amounts in the stomach after the rotifer is exposed for 24 h to 0.5 mg L-1 of Pb(NO3)2. When the exposure concentration of Pb(NO3)2 is increased to 1.0 mg L-1, lead was detected mostly in the cuticle after 24 h. Analysis of x-ray microanalysis by energy dispersion suggests a loss of calcium and rubidium, and an increase of aluminum, niobium, and silicon. A discussion comparing bioaccumulation between the rotifers Brachionus calyciflorus and Lecane quadridentata is included.
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