title: Tolerance and hyperaccumulation of a mixture of heavy metals (Cu, Pb, Hg, and Zn) by four aquatic macrophytes.
abstract: In the present investigation, four macrophytes, namely Typha latifolia (L.), Lemna minor (L.), Eichhornia crassipes (Mart.) Solms-Laubach, and Myriophyllum aquaticum (Vell.) Verdc, were evaluated for their heavy metal (Cu, Pb, Hg, and Zn) hyperaccumulation potential under laboratory conditions. Tolerance analyses were performed for 7 days of exposure at five different treatments of the metals mixture (Cu+2, Hg+2, Pb+2, and Zn+2). The production of chlorophyll and carotenoids was determined at the end of each treatment. L. minor revealed to be sensitive, because it did not survive in all the tested concentrations after 72 hours of exposure. E. crassipes and M. aquaticum displayed the highest tolerance to the metals mixture. For the most tolerant species of aquatic macrophytes, The removal kinetics of E. crassipes and M. aquaticum was carried out, using the following mixture of metals: Cu (0.5 mg/L) and Hg, Pb, and Zn 0.25 mg/L. The obtained results revealed that E. crassipes can remove 99.80% of Cu, 97.88% of Pb, 99.53% of Hg, and 94.37% of Zn. M. aquaticum withdraws 95.2% of Cu, 94.28% of Pb, 99.19% of Hg, and 91.91% of Zn. The obtained results suggest that these two species of macrophytes could be used for the phytoremediation of this mixture of heavy metals from the polluted water bodies.
authors.affiliation: a Departamento de Farmacia , Facultad de Química, Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Jorge Alberto
authors.initials: JA
authors.lastname: Romero-Hernández
authors.affiliation: a Departamento de Farmacia , Facultad de Química, Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Araceli
authors.initials: A
authors.lastname: Amaya-Chávez
authors.affiliation: b Centro Conjunto de Investigación en Química Sustentable, Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Patricia
authors.initials: P
authors.lastname: Balderas-Hernández
authors.affiliation: b Centro Conjunto de Investigación en Química Sustentable, Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Roa-Morales
authors.affiliation: b Centro Conjunto de Investigación en Química Sustentable, Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Nelly
authors.initials: N
authors.lastname: González-Rivas
authors.affiliation: c Facultad de Geografía, Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Miguel Ángel
authors.initials: MÁ
authors.lastname: Balderas-Plata
mesh_terms: D059001:Aquatic Organisms / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019684:Magnoliopsida / Q000378:metabolism*; D019216:Metals, Heavy / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: bioaccumulation; macrophytes; mixture of heavy metals