Determination of soluble toxic arsenic species in alga samples by microwave-assisted extraction and high performance liquid chromatography–hydride generation–inductively coupled plasma-atomic emission spectrometry

Salgado, Sara García; Simon, M. Milagros Bonilla

doi:10.1016/j.chroma.2006.06.083

Cited by 56 publications

(7 citation statements)

References 21 publications

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“…Arsenic toxicity in environmental and biological systems is strongly dependent on the chemical species. Its speciation has received significant attention over the last years due to its-species-dependent toxicity (Salgado et al, 2006;Pisani et al, 2011;Onnby et al, 2012;Wang et al, 2015). As speciation plays a significant role in its behavior and fate in the environment, and different As species differ greatly in their mobility, availability and toxicity to cells (Cai et al, 2002;.…”

Section: Arsenic Speciation and Toxicity To Microalgaementioning

confidence: 99%

Arsenic Species Distribution and Toxicity in the Environment, Bioaccumulation, Biomethylation and Bioremediation by Microalgae: A Review

Obuekwe,

Ajuzie

2024

jasem

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Arsenic (As) is a noxious metalloid that has been designated a priority pollutant and is present in the environment as a consequence of both anthropogenic and natural processes. Its toxicity in environmental and biological systems depends strongly on the chemical species. Interest in arsenic and microalgae interactions is important because microalgae are at the base of the aquatic food chain, are used in animal nutrition and has potential for As phytoremediation. This paper reviewed the current information on As species distribution in the environment especially as it relates to its toxicity to microalgae as well as its bioaccumulation, biomethylation and bioremediation by microalgae using appropriate methods. Information obtained revealed that Microalgae have evolved mechanisms for dealing with As in the environment with arsBHC operon mediating the reduction and extrusion of arsenite from the cells. They accumulate large amounts of arsenic from their surroundings which could lead to toxicity, As excretion from cells, reduction, methylation or complexation with metal binding peptides like glutathione and phytochelatins. This has made them suitable as ecological indicators to give an indication of As bioavailability and also in possible applications for the process of As remediation. Microalgae are been proposed for bioremediation purposes in aquatic environment since they show a high capacity for biosorption and bioconcentration of As and most importantly since they are able to methylate inorganic As to non-toxic organic and volatile As.

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Section: Arsenic Speciation and Toxicity To Microalgaementioning

confidence: 99%

Arsenic Species Distribution and Toxicity in the Environment, Bioaccumulation, Biomethylation and Bioremediation by Microalgae: A Review

Obuekwe,

Ajuzie

2024

jasem

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“…Therefore, element species can be quantified without having a standard compound available for calibration or even knowing the molecular structure. Hence, numerous studies have been published [2][3][4][5] in which elemental species of elements such as arsenic or selenium have been exactly quantified without knowing their molecular structure. More importantly, this characteristic makes it possible to establish a mass balance of all species of a given element in a sample.…”

Section: Developments In Hyphenated Ms Techniquesmentioning

confidence: 99%

Critical review perspective: elemental speciation analysis methods in environmental chemistry - moving towards methodological integration

2009

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Environmental context. Elemental speciation defines mobility, accumulation behaviour and toxicity of elements in the environment. Environmental processes are then modelled using species information. Hence, it is important for environmental chemists to rely on unequivocal, precise and accurate analytical data for the identification and quantification of elemental species.Abstract. We review the application of speciation analysis used in environmental chemistry studies to gain information about the molecular diversity of elements in various environmental compartments. The review focuses on three major analytical methodologies: electrochemical, X-ray absorption spectroscopy, and methods that couple chromatography with mass spectrometric detection. In particular, the review aims to highlight the advantages and disadvantages of the three methods, and to demonstrate that both the chemistry of the element and the nature of the environmental compartment determine the choice of the preferred analytical technique. We demonstrate that these two factors can lead to techniquedependent shortcomings that contribute to the current gaps in knowledge of elemental speciation in the environment. In order to fill those gaps, multi-method approaches are urgently needed. Finally, we present a selection of recent studies that exhibit the potential to use complementary techniques to overcome method-dependent limitations in order to reduce ambiguities and to gain more confidence in the assignment of the molecular structure of elements in environmental samples. Jörg Feldmann received his Ph.D. in Environmental Analytical Chemistry at University of Essen (Germany). He is the recipient of the Prize of the University of Essen and the Feodor Lynen Award (Alexander von Humboldt Foundation). After two years at the University of British Columbia (Canada), he became lecturer in 1997 at the University of Aberdeen (Scotland), where he progressed to a Chair in 2004. He is a member of the Environmental Chemistry Advisory Board and has published more than 100 scientific papers mainly on element speciation analysis in environmental and biological systems. The main focus of his research is on the use of hyphenated techniques for elemental and molecular mass spectrometry.Pascal Salaün is an analytical and environmental chemist interested in the physico-chemical processes influencing the biogeochemical cycling of trace elements. He is specialised in the development of electrochemical sensors for the detection and speciation of metals and metalloids in natural systems. Currently, his research focuses on the use of solid microelectrodes, their application for on-site/in-situ monitoring and complexation studies together with the development of metallic nanostructures for electroanalytical purposes. He obtained a 5 years research fellowship in 2007 focusing on arsenic speciation in fresh/marine waters and in biological systems. Enzo Lombi received a Ph.D. in agricultural chemistry

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Section: Extração Assistida Por Micro-ondaunclassified

“…Em MAE, já foram realizados estudos sobre a capacidade de extração de arsênio, utilizando material certificado de alga, junto com estudos sobre a variação no número de oxidação das espécies [41]. fulvellum apresentado pelos autores [41], foi possível observar a presença de quatro espécies de arsênio (As i (III), As i (V), DMA e MMA), porém, não existe certificação para as suas concentrações no material estudado. Nischwitz et al [34], Raab et al [35] e Rahman et al [37] também analisaram seus extratos por técnicas de separação para identificar espécies de arsênio, porém, nos materiais utilizados por eles também não apresentavam as concentrações individuais das espécies.…”

Section: Extração Assistida Por Micro-ondaunclassified

“…Algumas vezes, técnicas de separação são combinadas on line com técnicas de espectrometria atômica para análise de especiação. Desta forma, Salgado et al [41] uniram a técnica de cromatografia líquida com derivatização pós coluna para gerar hidretos com espectrometria de emissão ótica com plasma indutivamente acoplado (HPLC-HG-ICP OES) para análise de espécies de As i (III), DMA, MMA e As i (V) em algas. Koellensperger et al [44] uniram cromatografia líquida e eletroforese capilar com espectrometria de massas com plasma indutivamente acoplado (HPLC-ICP-MS e CE-ICP-MS) para análise de As i (III), As i (V), DMA, MMA, AB e AC em solo contaminado com arsênio.…”

Section: Especiação E Química Analíticaunclassified

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Avaliação de um sistema FI-HG-MF-AAS e extração assistida pro micro-onda na especiação de arsênio inorgânico

Lehmann¹,

Arruda²

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Inicialmente à minha família: meus pais Eraldo e Marina (in memoriam), meus irmãos Sylvio e Simone, minha cunhada Fabiana e meus sobrinhos Gustavo e Amanda, por estarem sempre comigo me apoiando.Aos meus grandes amigos Bruno, Gabriel, Gustavo, Heitor, Humberto e Lucas, meus irmão de Unicamp, pelos grandes conselhos e pela amizade que me deram nas horas mais difíceis.Aos saudosos amigos da graduação Francisco, Gustavo, Heber, Júlio, Leila, Marcos, Mariana, Nelly e Paula, pelas divertidas horas de descontração durante a longa jornada até o diploma.

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Determination of soluble toxic arsenic species in alga samples by microwave-assisted extraction and high performance liquid chromatography–hydride generation–inductively coupled plasma-atomic emission spectrometry

Cited by 56 publications

References 21 publications

Arsenic Species Distribution and Toxicity in the Environment, Bioaccumulation, Biomethylation and Bioremediation by Microalgae: A Review

Arsenic Species Distribution and Toxicity in the Environment, Bioaccumulation, Biomethylation and Bioremediation by Microalgae: A Review

Critical review perspective: elemental speciation analysis methods in environmental chemistry - moving towards methodological integration

Avaliação de um sistema FI-HG-MF-AAS e extração assistida pro micro-onda na especiação de arsênio inorgânico

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