Copper Removal Efficiency in a Surface Water and Compartmentalization in the Floating Fern Salvinia minima
International Journal of Environmental Monitoring and Analysis
Volume 2, Issue 6-1, December 2014, Pages: 42-47
Received: Oct. 31, 2014;
Accepted: Nov. 20, 2014;
Published: Dec. 27, 2014
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María Victoria Casares, Bernardino Rivadavia National Museum of Natural History-National Council of Scientific and Technical Research (CONICET), Avenida Ángel Gallardo 470 (C1405DJR), Buenos Aires, Argentina
Laura I. de Cabo, Bernardino Rivadavia National Museum of Natural History-National Council of Scientific and Technical Research (CONICET), Avenida Ángel Gallardo 470 (C1405DJR), Buenos Aires, Argentina
Rafael S. Seoane, Faculty of Engineering, University of Buenos Aires, Avenida Las Heras 2214, (C1127AAR), Buenos Aires, Argentina; National Water Institute, Autopista Ezeiza-Cañuelas, Tramo Jorge Newbery km 1.62 (1802) Ezeiza, Buenos Aires, Argentina
Alicia Fabrizio de Iorio, Faculty of Agronomy, University of Buenos Aires, Avenida San Martín 4453 (C1417DSE), Buenos Aires, Argentina
In order to determine copper removal efficiency and compartmentalization in the free floating fern S. minima, a bioassay was performed in which plants were exposed to increasing copper concentrations in the range of 1 to 30 mg Cu L-1 for six days in Pilcomayo River surface water. S. minima accumulated the metal in a dose-dependent manner. Metal concentration was from 6.5 to 3.9 times higher in the submerged biomass in comparison to the aerial biomass in all treatments reflecting a poor mobility of copper between plant tissues. In both biomasses, most of the copper was localized in the extracellular compartment and increased lineally with increasing concentration of copper in water. The intracellular fraction increased following a polynomial function. The physicochemical characteristics of the experimental water influenced copper bioavailability inducing copper precipitation and the high concentration of calcium may have exerted a protective effect limiting metal entrance to cells. The values of the BCF and of the dry biomass weight that corresponded to copper showed that in Pilcomayo River water S. minima showed a copper removal efficiency not of a hyperaccumulator but of an effective accumulator.
María Victoria Casares,
Laura I. de Cabo,
Rafael S. Seoane,
Alicia Fabrizio de Iorio,
Copper Removal Efficiency in a Surface Water and Compartmentalization in the Floating Fern Salvinia minima, International Journal of Environmental Monitoring and Analysis. Special Issue:Environmental Science and Treatment Technology.
Vol. 2, No. 6-1,
2014, pp. 42-47.
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