Synchrotron radiation total reflection for rainwater analysis

Simabuco, Silvana M.; Matsumoto, Edson

doi:10.1016/s0584-8547(00)00158-0

Cited by 21 publications

(3 citation statements)

References 10 publications

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“…(4) (Simabuco and Matsumoto 2000;Salvador et al 2004;EspinozaQuiñones et al 2005). The lead concentration on drybiomass digestion solution (roots or leaves) was determined according to Eq.…”

Section: Calibration System and Quantitative Analysismentioning

confidence: 99%

Kinetics of Lead Bioaccumulation from a Hydroponic Medium by Aquatic Macrophytes Pistia stratiotes

Espinoza‐Quiñones

Módenes

Costa

et al. 2009

Water Air Soil Pollut

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The goal of this work was to study quantitatively lead bioaccumulation from a leaddoped nutrient medium by using a living aquatic macrophytes Pistia stratiotes. Several sets of aquatic plants with approximately 30 g weight were grown in greenhouse conditions and in hydroponic solutions supplied with a non-toxic Pb 2+ concentration. The synchrotron radiation total X-ray fluorescence spectrometry was used to determine the metal concentrations in dry plants and hydroponic media as a function of time. Four different non-structural bioaccumulation models were applied to describe the process dynamics and to estimate the accumulated lead maximum capacity and rate constants. According to the experimental data, both biosorption and bioaccumulation mechanisms can be considered. Due to the low desorption rate constant, the experimental data were well described by the irreversible kinetic model. The results concerning modeling of living macrophytes' metal bioaccumulation kinetics can be used to predict the heavy metal removal dynamics from wastewaters in artificial wetlands.

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Section: Calibration System and Quantitative Analysismentioning

confidence: 99%

Kinetics of Lead Bioaccumulation from a Hydroponic Medium by Aquatic Macrophytes Pistia stratiotes

Espinoza‐Quiñones

Módenes

Costa

et al. 2009

Water Air Soil Pollut

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“…Using the relative-to-gallium sensitivity function, the chromium concentration in aqueous solutions (nutritive solution or digested biomass (roots or leaves)) were calculated by using Eq. 3 (Simabuco and Matsumoto 2000;Salvador et al 2004;Espinoza-Quiñones et al 2005). Nevertheless, the chromium mass per dried biomass (roots or leaves) was determined from the chromium concentration on dry-biomass digestion solution, according to the Eq.…”

Section: Chromium Concentrationmentioning

confidence: 99%

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

Espinoza‐Quiñones

Silva

Rizzutto

et al. 2008

World J Microbiol Biotechnol

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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 Cr 3? and Cr 6? 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 Cr 3? removal efficiency was about 90%, 50%, and 90% for the E. crassipes, P. stratiotes, and S. auriculata, respectively; while it was rather different for Cr 6? one, with values about 50%, 70%, and 90% for the E. crassipes, P. stratiotes, and S. auriculata.

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“…TXRF combined with synchrotron radiation (SR) as excitation source offers new possibilities of reaching lower detection limits due to the high intensity, the linear polarization, and the natural collimation of the SR beam [5,11]. These advantages allow the use of SR-TXRF for analyzing trace chemical elements in rainwater, drinking water, sea water, and river water (e.g., [12,13]).…”

Section: Introductionmentioning

confidence: 99%