Optimisation of sample treatment for arsenic speciation in alga samples by focussed sonication and ultrafiltration

Salgado, Sara García; Simon, M. Milagros Bonilla

doi:10.1016/j.talanta.2005.08.004

Cited by 33 publications

(10 citation statements)

References 20 publications

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“…Many macroalgae are able to accumulate high levels of trace metals, which are sometimes larger than those found in water samples from the same site (Cardwell et al, 2002;Salgado et al, 2006) and also have the ability to produce phytochemicals of potential interest (El Maghraby and Fakhry, 2015).…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of iron oxide (Fe3O4) nanoparticles using two selected brown seaweeds: Characterization and application for lead bioremediation

2016

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The exploitation of different plant materials for the biosynthesis of nanoparticles is considered a green technology because it does not involve any harmful chemicals. In this study, iron oxide nanoparticles (Fe 3 O 4 -NPs) were synthesized using a completely green biosynthetic method by reduction of ferric chloride solution using brown seaweed water extracts. The two seaweeds Padina pavonica (Linnaeus) Thivy and Sargassum acinarium (Linnaeus) Setchell 1933 were used in this study. The algae extract was used as a reductant of FeCl 3 resulting in the phytosynthesis of Fe 3 O 4 -NPs. The phytogenic Fe 3 O 4 -NPs were characterized by surface plasmon band observed close to 402 nm and 415 nm; the obtained Fe 3 O 4 -NPs are in the particle sizes ranged from 10 to 19.5 nm and 21.6 to 27.4 nm for P. pavonica and S. acinarium, respectively. The strong signals of iron were reported in their corresponding EDX spectra. FTIR analyses revealed that sulphated polysaccharides are the main biomolecules in the algae extracts that do dual function of reducing the FeCl 3 and stabilizing the phytogenic Fe 3 O 4 -NPs. The biosynthesized Fe 3 O 4 -NPs were entrapped in calcium alginates beads and used in Pb adsorption experiments. The biosynthesized Fe 3 O 4 -NPs alginate beads via P. pavonica (Linnaeus) Thivy had high capacity for bioremoval of Pb (91%) while that of S. acinarium (Linnaeus) Setchell 1933 had a capacity of (78%) after 75 min. The values of the process parameters for the maximum Pb removal efficiency by Fe 3 O 4 -NPs alginate beads synthesized via P. pavonica (Linnaeus) Thivy were also estimated.Citation: El-Kassas Hala Y, Aly-Eldeen Mohamed A, Gharib Samiha M. 2016. Green synthesis of iron oxide (Fe 3 O 4 ) nanoparticles using two selected brown seaweeds: Characterization and application for lead bioremediation. Acta Oceanologica Sinica,

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Section: Introductionmentioning

confidence: 99%

Green synthesis of iron oxide (Fe3O4) nanoparticles using two selected brown seaweeds: Characterization and application for lead bioremediation

2016

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Section: Bioremediationmentioning

confidence: 96%

Algae of economic importance that accumulate cadmium and lead: a review

Souza¹,

Ferreira²,

Pires³

et al. 2012

Rev. bras. farmacogn.

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Currently, algae and algae products are extensively applied in the pharmaceutical, cosmetic and food industries. Algae are the main organisms that take up and store heavy metals. Therefore, the use of compounds derived from algae by the pharmaceutical industry should be closely monitored for possible contamination. The pollution generated by heavy metals released by industrial and domestic sources causes serious changes in the aquatic ecosystem, resulting in a loss of biological diversity and a magnifi cation and bioaccumulation of toxic agents in the food chain. Since algae are at the bottom of the aquatic food chain, they are the most important vector for transfer of pollution to upper levels of the trophic chain in aquatic environments. Moreover, microalgae are also used for the bioremediation of wastewater, a process that does not produce secondary pollution, that enables effi cient recycling of nutrients and that generates biomass useful for the production of bioactive compounds and biofuel.

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“…En los últimos años, las algas del suelo han emergido como candidatas potenciales para su aplicación en el desarrollo de un medio ambiente sustentable (Singh et al, 2016(Singh et al, , 2017. Recientemente, las Cyanobacteria y algas eucarióticas han sido foco de estudio dada su habilidad para adsorber, secuestrar, formar complejos con MP y translocarlos a sus vacuolas (Suresh & Ravishankar, 2004), pudiendo ser utilizadas para la restauración en ambientes contaminados con MP o hidrocarburos (Salgado et al, 2006).…”

Section: Introductionunclassified

Algas y Cyanobacteria presentes en la rizosfera de plantas acumuladoras de plomo

Becerra

Daga

Murialdo

et al. 2021

Bol. Soc. Argent. Bot.

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Introducción y objetivos: Las especies de algas y Cyanobacteria que crecen en sitios contaminados pueden acumular altas concentraciones de metales pesados. En este trabajo se propuso a) caracterizar la comunidad de algas y Cyanobacteria y b) evaluar el efecto del plomo (Pb) sobre la composición de algas presentes en la rizosfera de plantas capaces de acumular Pb en la provincia de Córdoba. M&M: Se tomaron muestras de suelo de la rizosfera de Sorghum halepense, Bidens pilosa y Tagetes minuta en sitios con diferentes niveles de Pb. En el laboratorio, el suelo se sembró en cápsulas con medio de Watanabe esterilizado. Los cultivos crecieron 9 semanas. Se identificó en el tiempo y analizó la frecuencia relativa final de las algas y Cyanobacteria. Resultados: En suelos contaminados se identificaron 24 especies de Cyanobacteria, Chloroplastida y Xanthophyceae. Las Cyanobacteria con heterocitos Cylindrospermum muscicola, Nostoc commune y Calothrix clavata registraron una frecuencia media relativa (entre 21 y 60%). Trebouxia parmeliae (Chloroplastida) y Vaucheria sp. (Xanthophyceae) estuvieron presentes en los suelos con mayor nivel de Pb. La mayor parte de las especies se concentraron en los niveles más bajos de Pb. Conclusiones: Se observó un efecto negativo del Pb sobre la riqueza de especies de algas y Cyanobacteria en la rizosfera de las plantas evaluadas. En base a la composición de la comunidad de algas y Cyanobacteria del suelo se determinan dos grandes grupos que podrían ser considerados como comunidades tolerantes y no tolerantes a la contaminación de Pb.

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Optimisation of sample treatment for arsenic speciation in alga samples by focussed sonication and ultrafiltration

Cited by 33 publications

References 20 publications

Green synthesis of iron oxide (Fe3O4) nanoparticles using two selected brown seaweeds: Characterization and application for lead bioremediation

Green synthesis of iron oxide (Fe3O4) nanoparticles using two selected brown seaweeds: Characterization and application for lead bioremediation

Algae of economic importance that accumulate cadmium and lead: a review

Algas y Cyanobacteria presentes en la rizosfera de plantas acumuladoras de plomo

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