Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses

Background: The increased industrial activity has resulted in the discharge of large amount of pollutants including non-degradable metals into the environment. Chromium is produced in several industrial processes and it can be found in the environment in two stable oxidation states, Cr(VI) and Cr(II...

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Autores principales:	Plaza Cazón,Josefina, Viera,Marisa, Donati,Edgardo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2013
Materias:	biosorption brown algae chromium heavy metals
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000300006
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spelling	oai:scielo:S0717-345820130003000062013-08-22Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomassesPlaza Cazón,JosefinaViera,MarisaDonati,Edgardo biosorption brown algae chromium heavy metals Background: The increased industrial activity has resulted in the discharge of large amount of pollutants including non-degradable metals into the environment. Chromium is produced in several industrial processes and it can be found in the environment in two stable oxidation states, Cr(VI) and Cr(III). Cr(VI) is more hazardous due to its carcinogenic and mutagenic effects on living organisms. Although much less toxic, Cr(III) can also exert genotoxic effects under prolonged or severe exposure. It can be separated from the solution by precipitation but biosorption using brown algae seems to be an effective and sustainable treatment technique owing to its cost-effectiveness and environmental friendly characteristics. Macrocystis pyrifera and Undaria pinnatifida are two marine brown macroalgae with high capability of removing heavy metals including Cr(III) in batch mode of operation. In this work packed bed biosorption of Cr(III) by M. pyrifera and U. pinnatifida biomasses was evaluated. Results: The shapes of the breakthrough curves were rather different for each biomaterial. Parameters like the breakthrough time (t b) andzone mass transfer (MTZ) showed that U. pinnatifida has greater affinity for Cr(III). The maximum adsorption capacity at the exhaustion operating time (t e) demonstrated that M. pyrifera has higher retention capacity of Cr(III). The experimental data were fitted to Thomas, Yoon-Nelson and Dose-Response models. The best correlation coefficient (0.94 or 0.96) was obtained with Dose-Response that accurately describes the uptake behaviour of Cr(III) on the seaweed biomasses under different experimental conditions. The FT-IR spectra evidenced that Cr(III) adsorption occurred mainly by interaction between metal and carboxylate groups present on both the seaweed surfaces. Conclusions: M. pyrifera and U. pinnatifida biomasses are efficient biosorbents for Cr(III) adsorption under a continuous mode of operation although differences between uptake capacities suggest different mechanisms involved in the biosorption.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.16 n.3 20132013-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000300006en10.2225/vol16-issue3-fulltext-8
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	biosorption brown algae chromium heavy metals
spellingShingle	biosorption brown algae chromium heavy metals Plaza Cazón,Josefina Viera,Marisa Donati,Edgardo Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses
description	Background: The increased industrial activity has resulted in the discharge of large amount of pollutants including non-degradable metals into the environment. Chromium is produced in several industrial processes and it can be found in the environment in two stable oxidation states, Cr(VI) and Cr(III). Cr(VI) is more hazardous due to its carcinogenic and mutagenic effects on living organisms. Although much less toxic, Cr(III) can also exert genotoxic effects under prolonged or severe exposure. It can be separated from the solution by precipitation but biosorption using brown algae seems to be an effective and sustainable treatment technique owing to its cost-effectiveness and environmental friendly characteristics. Macrocystis pyrifera and Undaria pinnatifida are two marine brown macroalgae with high capability of removing heavy metals including Cr(III) in batch mode of operation. In this work packed bed biosorption of Cr(III) by M. pyrifera and U. pinnatifida biomasses was evaluated. Results: The shapes of the breakthrough curves were rather different for each biomaterial. Parameters like the breakthrough time (t b) andzone mass transfer (MTZ) showed that U. pinnatifida has greater affinity for Cr(III). The maximum adsorption capacity at the exhaustion operating time (t e) demonstrated that M. pyrifera has higher retention capacity of Cr(III). The experimental data were fitted to Thomas, Yoon-Nelson and Dose-Response models. The best correlation coefficient (0.94 or 0.96) was obtained with Dose-Response that accurately describes the uptake behaviour of Cr(III) on the seaweed biomasses under different experimental conditions. The FT-IR spectra evidenced that Cr(III) adsorption occurred mainly by interaction between metal and carboxylate groups present on both the seaweed surfaces. Conclusions: M. pyrifera and U. pinnatifida biomasses are efficient biosorbents for Cr(III) adsorption under a continuous mode of operation although differences between uptake capacities suggest different mechanisms involved in the biosorption.
author	Plaza Cazón,Josefina Viera,Marisa Donati,Edgardo
author_facet	Plaza Cazón,Josefina Viera,Marisa Donati,Edgardo
author_sort	Plaza Cazón,Josefina
title	Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses
title_short	Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses
title_full	Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses
title_fullStr	Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses
title_full_unstemmed	Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses
title_sort	dynamic cr(iii) uptake by macrocystis pyrifera and undaria pinnatifida biomasses
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000300006
work_keys_str_mv	AT plazacazonjosefina dynamiccriiiuptakebymacrocystispyriferaandundariapinnatifidabiomasses AT vieramarisa dynamiccriiiuptakebymacrocystispyriferaandundariapinnatifidabiomasses AT donatiedgardo dynamiccriiiuptakebymacrocystispyriferaandundariapinnatifidabiomasses
_version_	1718441872436756480

Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses

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