%0 Journal Article
%A Fuentes, Bárbara
%A Mora, María de la Luz
%A Bol, Roland
%A San Martin, Francisca
%A Pérez, Elizabeth
%A Cartes, Paula
%T Sorption of inositol hexaphosphate on desert soils
%J Geoderma
%V 232-234
%@ 0016-7061
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2014-05617
%P 573 - 580
%D 2014
%X Sorption of inositol hexaphosphate (IP6) on desert soils was studied to evaluate their use as a novel low-cost sorbent material for organic P removal in water treatment. The kinetics of IP6 sorption, pH effects, and sorption isotherms were examined in batch experiments on four desert saline–sodic soils: Antofagasta (AN), Mejillones (ME), Aguas Blancas I (ABI), and Aguas Blancas II (ABII). The sorption kinetics of inositol hexaphosphate expressed as P (P-IP6) on these soils were described by the Elovich equation and the initial sorption velocities ranked in the order: ABII > ABI > ME > AN. In addition, P-IP6 sorption capacity in AN, ME, and ABI was strongly influenced by the solution pH, but in ABII it was not pH-dependent. Whereas the experimental data of P-IP6 sorption on ME, ABI, and ABII were better fitted by the Langmuir equation (implying a homogenous distribution of active sorption sites), for AN the best fit was obtained with the Freundlich model (implying heterogeneous, multi-layered sorption surfaces). The maximum P-IP6 sorption capacities ranked: ABII > ME > AN > ABI. Based on the results of our study, ABII soil is recommended for P-IP6 removal. In this soil, P-IP6 sorption did not depend on solution pH, and the precipitation and sorption of IP6 were associated with Ca2 +, Mg2 +, and minerals such as montmorillonite and vermiculite.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000340315700055
%R 10.1016/j.geoderma.2014.06.016
%U https://juser.fz-juelich.de/record/172073