Chromium, nickel, lead and zinc accumulation and performance in relation to their use in phytoremediation of macrophyte Limnobium laevigatum

ARÁN, D; HARGUINTEGUY, C; FERNÁNDEZ-CIRELLI, A; PIGNATA, M

Ciudad Autónoma de Buenos Aires

Congreso; SETAC Latin America 11th Biennial Meeting; 2015

Society of Environmental Toxicology and Chemistry (SETAC)

Chromium, nickel, lead and zinc accumulation and performance in relation to their use in phytoremediation of macrophyte Limnobium laevigatumD.S. Arán, FCEFyN-UNC; C.A. Harguinteguy, IMBIV-CONICET / Chemistry;A. Fernández-Cirelli, INPA, CONICET, UBA; M. Pignata, IMBIV-CONICETThe contamination of aquatic environments is a major problem worldwide, and heavy metals are among the most common pollutants because of their transferand accumulation occurring in different biotic and abiotic compartments. It isknown that heavy metals in aquatic systems can be easily absorbed and accumulated in aquatic plants. Therefore, in order to study the accumulation ofchromium, nickel, lead and zinc and the stress response for their use in thephytoremediation of aquatic environments, the floating aquatic plant Limnobiumlaevigatum was exposed to increasing concentrations of a mixture of these metals(Cr: 0,002 ? 2,0 mg L-1; Ni: 0,025 ? 0,5 mg L-1; Pb: 0,001 ? 2 mg L-1; Zn: 0,03? 0,1 mg L-1) for 7 days. The accumulation of Cr, Ni, Pb and Zn in plants wasdetermined using GFAAS (graphite furnace atomic absorption spectrometer,Analyst 600, PerkinElmer, USA) and their effects on physiological parameters(chlorophyll a and b concentration and degradation, carotenoids concentration,lipid peroxidation measured as malondialdehyde and HPCD) were evaluatedusing BeckmanDU7000 spectrophotometer. The data obtained were analyzed byanalysis of variance (ANOVA), at a significance level of p < 0.01, to investigate differences between treatments which were followed by a posteriori test (p