Evaluation of the Sagittaria montevidensis Cham. & Schltdl. as a bioindicator and phytoextractor of toxic metals

  • Edila Maria Kickhöfel Ferrer Instituto Federal de Educação, Ciência e Tecnologia Sul-rio-grandense (IFSul), Pelotas, RS, Brasil Grupo de Pesquisa em Contaminantes Ambientais (GPCA).
  • Glauco Rasmussen Betemps Instituto Federal de Educação, Ciência e Tecnologia Sul-rio-grandense (IFSul), Pelotas, RS, Brasil Grupo de Pesquisa em Contaminantes Ambientais (GPCA).
  • Nathaly Nunes da Rosa Instituto Federal de Educação, Ciência e Tecnologia Sul-rio-grandense (IFSul), Pelotas, RS, Brasil Grupo de Pesquisa em Contaminantes Ambientais (GPCA).
  • Pedro José Sanches Filho Instituto Federal de Educação, Ciência e Tecnologia Sul-rio-grandense (IFSul), Pelotas, RS, Brasil Grupo de Pesquisa em Contaminantes Ambientais (GPCA).
Keywords: aquatic macrophyte, heavy metals, phytoremediation.

Abstract

This study evaluated the bioindication and phytoremediation capacity of the aquatic macrophyte Sagittaria montevidensis by using it to assess the bioconcentration and translocation of heavy metals. A simple sampling was conducted at four sites in the region of Pelotas, southern Brazil, where plants, water and sediments were collected. The plants were subjected to nitric-perchloric acid digestion and the sediments underwent pseudo-total acid digestion. The determination of the elements Cr, Cu, Pb, Ni and Zn in the extracts was performed by flame atomic absorption spectrometry. Physicochemical tests were also carried out on water samples, including pH, electrical conductivity, chlorides, alkalinity, hardness and organic matter, and in sediment samples, moisture and organic matter content. The macrophyte study indicated a Bioconcentration Factor (BCF) and a Translocation Factor (TF), especially for Ni. The results showed that the aquatic macrophyte species S. montevidensis has a phytoextraction capacity, mainly for Ni, and potentially for bioindication of Cu, Ni and Zn.


Published
23/11/2017
Section
Papers