Resumo

VERA, Alexandra et al. Phytoremediation of wastewater with high lead content and using Typha dominguensis and Canna generalis. Rev. Téc. Ing. Univ. Zulia [online]. 2016, vol.39, n.2, pp.088-095. ISSN 0254-0770.

Phytoremediation potential of Typha domingensis (Td) and Canna generalis (Cg) in lead removal from wastewater using constructed wetlands laboratory scale was assessed. The wastewater was prepared at concentrations of 5, 10 and 15 mg L -1 Pb . 9 treatments (3 controls without plants, 3 planted with Td and 3 planted with Cg) were established, for the different concentrations of lead in evaluating. Hydraulic retention time was of 4 days; pH and alkalinity was monitored daily. Pb removal in planted treatments were not different compared to control, prevailing at the first 2h of the treatment, physicochemical mechanisms of metal precipitation and absorption to the material in suspension and the corresponding ground deposition, then removal was enhanced 24h later by biological processes (metal uptake by plants). Cg was able to absorb higher lead concentration in the roots than in leaves, the opposite behavior of Td presented greater capacity for translocation of metal, capacity I was diminished with increasing concentration of Pb in water, it is demonstrated the role of these macrophytes as bioacumuladoras Pb.

Palavras-chave : Phytoremediation; Lead; Typha; Canna; wastewater.

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