Chromium ions phytoaccumulation by three floating aquatic macrophytes from a nutrient medium

• Published in: World journal of microbiology & biotechnology Vol. 24; no. 12; pp. 3063 - 3070
• Main Authors: Espinoza-Quiñones, Fernando Rodolfo, da Silva, Edson Antonio, de Almeida Rizzutto, Márcia, Palácio, Soraya Moreno, Módenes, Aparecido Nivaldo, Szymanski, Nayara, Martin, Neiva, Kroumov, Alexander Dimitrov
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : Springer Netherlands 01.12.2008; Springer Netherlands; Springer; Springer Nature B.V
• Subjects: Applied Microbiology; Aquatic ecology; Aquatic plants; Binding sites; Bioaccumulation; Biochemistry; Biological and medical sciences; Biomedical and Life Sciences; Biotechnology; Chemical elements; Chromium; Drinking water; Environmental Engineering/Biotechnology; Experiments; Free floating; Freshwater; Fundamental and applied biological sciences. Psychology; Heavy metals; Hydroponics; Ions; Life Sciences; Mathematical models; Media; Metals; Microbiology; Nitrates; Nutrient concentrations; Nutrients; Original Paper; Phytoremediation; Plants (organisms); Polyethylene; Radiation; Studies; X-ray fluorescence; Hydroponic medium; Phytoaccumulation; SR-TXRF technique; Chromium ions; Nonstructural kinetic model; Floating aquatic macrophytes; Kinetic model; Chromium; Nutrient; Technique
• ISSN: 0959-3993; 1573-0972
• DOI: 10.1007/s11274-008-9853-9

In the present work, the trivalent and hexavalent chromium phytoaccumulation by three living free floating aquatic macrophytes Salvinia auriculata, Pistia stratiotes, and Eicchornia crassipes was investigated in greenhouse. These plants were grown in hydroponic solutions supplied with non-toxic Cr³⁺ and Cr⁶⁺ chromium concentrations, performing six collections of nutrient media and plants in time from a batch system. The total chromium concentrations into Cr-doped hydroponic media and dry roots and aerial parts were assayed, by using the Synchrotron radiation X-ray fluorescence technique. The aquatic plant-based chromium removal data were described by using a nonstructural kinetic model, obtaining different bioaccumulation rate, ranging from 0.015 to 0.837 l mg⁻¹ d⁻¹. The Cr³⁺ removal efficiency was about 90%, 50%, and 90% for the E. crassipes, P. stratiotes, and S. auriculata, respectively; while it was rather different for Cr⁶⁺ one, with values about 50%, 70%, and 90% for the E. crassipes, P. stratiotes, and S. auriculata.