Cr(III) biosorption by forest wastes from Araucaria angustifolia and Pinus elliottii: biosorbent surface characterization and chromium quantification by spectrofluorimetry in micellar medium

Santos, Fernando; Idrees, Muhammad; Silva, Marcelo; Lima, P.H.E.; Bueno, Natália S.; Nome, Faruk; Fiedler, Haidi D.; Pires, Marçal

doi:10.1080/19443994.2012.758600

Cited by 10 publications

(5 citation statements)

References 23 publications

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“…O. Kuntze (Paraná tree), referred to as "pinhão", are formed by a resistant external tegument (shell or coat) composed of lignocellulosic material rich in tannins and an internal edible pulp (Bello-Pérez et al, 2006;Conforti & Lupano, 2008;Lima et al, 2007;Santos et al, 2013). Seeds are produced seasonally and typically consumed after boiled in water.…”

Section: Introductionmentioning

confidence: 99%

Antioxidants extraction from Pinhão ( Araucaria angustifolia (Bertol.) Kuntze) coats and application to zein films

Freitas

Santos

Silva

et al. 2018

Food Packaging and Shelf Life

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A B S T R A C TSeeds from Araucaria angustifolia (Bertol.) Kuntze are consumed after cooking and their coats discarded. Both coats and the cooking water present phenolic compounds, which may be used to improve mechanical properties and provide antioxidant characteristics to films. The objective of this work was to obtain and pinhão coat extracts and to apply these polyphenolic-rich extracts in zein films. Phenolic compounds composition, extraction yield and antioxidant activity (DPPH, ABTS and FRAP) of the extracts were determined. The most abundant molecules present in the hydroethanolic extract were (+)-catechin and an (epi)catechin dimer, whereas protocatechuic acid were predominant in the both cooking water and ethanolic extracts. Glass transition temperature of zein was not found in the extract-loaded films. Morphological changes were also caused by the presence of the extracts yielding smoother surfaces. The extracts added to zein films led to a three-fold increase in tensile strength (from 5.80 MPa to 17.65 MPa) and two-fold increase in the elongation at break (from 1.60% to 3.18%).

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Section: Introductionmentioning

confidence: 99%

Antioxidants extraction from Pinhão ( Araucaria angustifolia (Bertol.) Kuntze) coats and application to zein films

Freitas

Santos

Silva

et al. 2018

Food Packaging and Shelf Life

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“…Numerous analytical techniques including inductively coupled plasma-atomic emission spectrometry (ICP-AES), 4,[6][7][8] ame atomic absorption spectrometry (FAAS), 1,9,10 inductively coupled plasma-mass spectrometry (ICP-MS), 11,12 ultraviolet visible absorption spectrometry (UV-vis), 13 high performance liquid phase chromatography (HPLC), 14 gas chromatography (GC), 15,16 inductively coupled plasma optical emission spectrometry (ICP-OES), 17 spectrouorimetry spectrophotometry, 18 and total reection X-ray spectrometry (TXRF) 19 have been reported for Cr determination. In spite of the advancement in modern analytical instruments, complications exist with direct determination of analytes at trace and ultra-trace levels.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polymethacrylate monolith modified with cysteine for the determination of Cr(iii) ions

et al. 2018

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“…The material was filtered using 8-lm quantitative filter paper and then replenished with 200 mL of extractor to obtain the extracts of the second, third and fourth washes. The conditions applied to wash the biosorbents were based on studies by Santos et al (2013).…”

Section: Sample Preparationmentioning

confidence: 99%

“…Several biological materials including microorganisms, algae and lignocellulosic biomasses are described in the literature as capable of removing metals from aqueous media (Sud et al 2008;Santos et al 2013;Pagnanelli et al 2013;Sidiras et al 2013;Ferraz et al 2014;Mishra 2014;Gebrehawaria et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Characterization and use of biosorbents prepared from forestry waste and their washed extracts to reduce/remove chromium

Santos

Alban

Frankenberg

et al. 2015

Int. J. Environ. Sci. Technol.

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This study aimed to characterize forestry waste of araucaria, eucalyptus and pine and their aqueous extracts to evaluate their performance in the reduction/removal biosorption of chromium. The biosorbents present a complex and rich composition of both organic and inorganic solubilizable compounds. These results confirmed the need of biomass pretreatment for its adequate use as biosorbent. The extracts obtained in the washing cycles at different pHs presented high organic loads. The pine is distinguished as the best biosorbent, and its performance is increased by prior washing in natural medium. Eucalyptus extract produces fastest Cr(VI) reduction due to the presence of high concentration of dissolved organic matter. The washing process of the biosorbents, besides improving the efficiency of overall chromium biosorption, prevents mobilization of the solubilizable compounds in the treated effluent. The biosorbents tested have potential for application in the treatment of wastewater containing chromium, at least in similar levels to those studied.

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Cr(III) biosorption by forest wastes from Araucaria angustifolia and Pinus elliottii: biosorbent surface characterization and chromium quantification by spectrofluorimetry in micellar medium

Cited by 10 publications

References 23 publications

Antioxidants extraction from Pinhão ( Araucaria angustifolia (Bertol.) Kuntze) coats and application to zein films

Antioxidants extraction from Pinhão ( Araucaria angustifolia (Bertol.) Kuntze) coats and application to zein films

Preparation of polymethacrylate monolith modified with cysteine for the determination of Cr(iii) ions

Characterization and use of biosorbents prepared from forestry waste and their washed extracts to reduce/remove chromium

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