TY  - JOUR
AU  - Fuentes, Bárbara
AU  - Mora, María de la Luz
AU  - Bol, Roland
AU  - San Martin, Francisca
AU  - Pérez, Elizabeth
AU  - Cartes, Paula
TI  - Sorption of inositol hexaphosphate on desert soils
JO  - Geoderma
VL  - 232-234
SN  - 0016-7061
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2014-05617
SP  - 573 - 580
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000340315700055
DO  - DOI:10.1016/j.geoderma.2014.06.016
UR  - https://juser.fz-juelich.de/record/172073
ER  -