Title:	Potential of macrophytes for removing atrazine from aqueous solution.
Authors:	GUIMARÃES, F. P. AGUIAR, R. KARAM, D. OLIVEIRA, J. A. SILVA, J. A. A. SANTOS, C. L. SANTANNA-SANTOS, B. F. LIZIERI-SANTOS, C.
Affiliation:	DECIO KARAM, CNPMS.
Date Issued:	2011
Citation:	Planta Daninha, Viçosa, MG, v. 29, p. 1137-1147, 2011.
Description:	The potential of three macrophytes, Azolla caroliniana, Salvinia minima, and Lemna gibba was assessed in this study to select plants for use in environmental remediation contaminated with atrazine. Experiments were carried out in a greenhouse over six days in pots containing Hoagland 0.25 strength nutritive solution at the following atrazineconcentrations: 0; 0.01; 0.1; 1.0; 10.0 mg L -1. Decrease in biomass accumulation was observed in the three macrophytes, as well as toxic effects evidenced by the symptomatology developed by the plants which caused their deaths. The chlorosis and necrosis allowed to observe in the plants the high sensitivity of the three species to the herbicide. Plants presented low potential for removal of atrazine in solution when exposed to low concentrations of the herbicide. However, at the 10.0 mg L-1 atrazine concentration, L. gibba and A. caroliniana showed potential to remove the herbicide from the solution (0.016 and 0.018 mg atrazine per fresh mass gram, respectively). This fact likely resulted from the processes of atrazine adsorption by the dead material. The percentage of atrazine removed from the solution by the plants decreased when the plants were exposed to high concentrations of the pollutant. Azolla caroliniana, S. minima, and L. gibba were not effective in removing the herbicide from solution. The use of these species to remedy aquatic environments was shown to be limited
Thesagro:	Herbicida
NAL Thesaurus:	Herbicides Azolla caroliniana Lemna gibba
Keywords:	Salvinia minima Biorremediação
DOI:	10.1590/S0100-83582011000500022
Notes:	Número especial.
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPMS)