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 del Carmen, Viera, Marisa Rosana, Donati, Edgardo Rubén
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Biosorption
Brown algae
Chromium
Heavy metals
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85521
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85521
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Biosorption
Brown algae
Chromium
Heavy metals
spellingShingle Ciencias Exactas
Biosorption
Brown algae
Chromium
Heavy metals
Plaza Cazón, Josefina del Carmen
Viera, Marisa Rosana
Donati, Edgardo Rubén
Dynamic Cr(III) uptake by Macrocystis pyrifera and Undaria pinnatifida biomasses
topic_facet Ciencias Exactas
Biosorption
Brown algae
Chromium
Heavy metals
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. <i>Macrocystis pyrifera</i> and <i>Undaria pinnatifida</i> 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 <i>M. pyrifera</i> and <i>U. pinnatifida</i> biomasses was evaluated. Results: The shapes of the breakthrough curves were rather different for each biomaterial. Parameters like the breakthrough time (t<SUB>b</SUB>) andzone mass transfer (MTZ) showed that <i>U. pinnatifida</i> has greater affinity for Cr(III). The maximum adsorption capacity at the exhaustion operating time (t<SUB>e</SUB>) demonstrated that <i>M. pyrifera</i> 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: <i>M. pyrifera</i> and <i>U. pinnatifida</i> 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.
format Articulo
Articulo
author Plaza Cazón, Josefina del Carmen
Viera, Marisa Rosana
Donati, Edgardo Rubén
author_facet Plaza Cazón, Josefina del Carmen
Viera, Marisa Rosana
Donati, Edgardo Rubén
author_sort Plaza Cazón, Josefina del Carmen
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
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85521
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AT vieramarisarosana dynamiccriiiuptakebymacrocystispyriferaandundariapinnatifidabiomasses
AT donatiedgardoruben dynamiccriiiuptakebymacrocystispyriferaandundariapinnatifidabiomasses
bdutipo_str Repositorios
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