RT Journal Article
T1 Adsorption, desorption and fractionation of As(V) on untreated andmussel shell-treated granitic material
A1 Seco Reigosa, Natalia
A1 Cutillas Barreiro, Laura
A1 Nóvoa Muñoz, Juan Carlos
A1 Arias Estévez, Manuel
A1 Álvarez Rodríguez, Esperanza
A1 Fernández Sanjurjo, María J.
A1 Núñez Delgado, Avelino
K1 Agricultural Chemistry
K1 As(V)
K1 Mussel shell
K1 Granitic material
AB As(V) adsorption and desorption were studied ongranitic material, coarse and fine mussel shell and graniticmaterial amended with 12 and 24 t ha−1fine shell, investi-gating the effect of different As(V) concentrations and dif-ferent pH as well as the fractions where the adsorbed As(V)was retained. As(V) adsorption was higher on fine than oncoarse shell. Mussel shell amendment increased As(V) ad-sorption  on  granitic  material.  Adsorption  data  correspond-ing  to  the  unamended  and  shell-amended  granitic  materialwere satisfactory fitted to the Langmuir and Freundlich mod-els. Desorption was always<19 % when the highest As(V)concentration (100 mg L−1) was added. Regarding the effectof  pH,  the  granitic  material  showed  its  highest  adsorption(66 %)  at  pH<6,  and  it  was  lower  as  pH  increased.  Fineshell  presented  notable  adsorption  in  the  whole  pH  rangebetween  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 pHincreased. Desorption varying pH was always<26 %. In thegranitic  material,  desorption  increased  progressively  whenpH increased from 4 to 6, contrary to what happened to mus-sel shell. Regarding the fractionation of the adsorbed As(V),most of it was in the soluble fraction (weakly bound). Thegranitic material did not show high As(V) retention capacity,which could facilitate As(V) transfer to water courses and tothe food chain in case of As(V) compounds being appliedon this material; however, the mussel shell amendment in-creased As(V) retention, making this practice recommend-able
PB Copernicus Publications
SN 1869-9510
YR 2015
FD 2015
LK http://hdl.handle.net/10347/21475
UL http://hdl.handle.net/10347/21475
LA eng
NO Seco-Reigosa, N., Cutillas-Barreiro, L., Nóvoa-Muñoz, J. C., Arias-Estévez, M., Álvarez-Rodríguez, E., Fernández-Sanjurjo, M. J., and Núñez-Delgado, A.: Adsorption, desorption and fractionation of As(V) on untreated and mussel shell-treated granitic material, Solid Earth, 6, 337–346, https://doi.org/10.5194/se-6-337-2015, 2015
NO This study was funded by the Ministerio de Economía y Competitividad (government of Spain), grant numbers CGL2012-36805-C02-01 and -02
DS Minerva
RD 29 abr 2026