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Adsorption, Desorption and Fractionation of as(V) on Untreated and Mussel Shell-treated Granitic Material : Volume 6, Issue 1 (17/03/2015)

By Seco-reigosa, N.

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Book Id: WPLBN0004021311
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Adsorption, Desorption and Fractionation of as(V) on Untreated and Mussel Shell-treated Granitic Material : Volume 6, Issue 1 (17/03/2015)  
Author: Seco-reigosa, N.
Volume: Vol. 6, Issue 1
Language: English
Subject: Science, Solid, Earth
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Cutillas-Barreiro, L., Álvarez-Rodríguez, E., Nóvoa-Muñoz, J. C., Fernández-Sanjurjo, M. J., Núñez-Delgado, A., Seco-Reigosa, N., & Arias-Estévez, M. (2015). Adsorption, Desorption and Fractionation of as(V) on Untreated and Mussel Shell-treated Granitic Material : Volume 6, Issue 1 (17/03/2015). Retrieved from

Description: Department of Soil Sciences and Agricultural Chemistry, Higher Polytechnic School, University Santiago de Compostela, 27002 Lugo, Spain. As(V) adsorption and desorption were studied on granitic material, coarse and fine mussel shell and granitic material amended with 12 and 24 t ha−1 fine shell, investigating the effect of different As(V) concentrations and different pH as well as the fractions where the adsorbed As(V) was retained. As(V) adsorption was higher on fine than on coarse shell. Mussel shell amendment increased As(V) adsorption on granitic material. Adsorption data corresponding to the unamended and shell-amended granitic material were satisfactory fitted to the Langmuir and Freundlich models. Desorption was always <19% when the highest As(V) concentration (100 mg L−1) was added. Regarding the effect of pH, the granitic material showed its highest adsorption (66%) at pH <6, and it was lower as pH increased. Fine shell presented notable adsorption in the whole pH range between 6 and 12, with a maximum of 83%. The shell-amended granitic material showed high As(V) adsorption, with a maximum (99%) at pH near 8, but decreased as pH increased. Desorption varying pH was always <26%. In the granitic material, desorption increased progressively when pH increased from 4 to 6, contrary to what happened to mussel shell. Regarding the fractionation of the adsorbed As(V), most of it was in the soluble fraction (weakly bound). The granitic material did not show high As(V) retention capacity, which could facilitate As(V) transfer to water courses and to the food chain in case of As(V) compounds being applied on this material; however, the mussel shell amendment increased As(V) retention, making this practice recommendable.

Adsorption, desorption and fractionation of As(V) on untreated and mussel shell-treated granitic material

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