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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.

Bioconcentration of Lead and x-ray Microanalysis with SEM in the Freshwater Rotifer Lecane quadridentata (Rotifera: Monogononta)