Hybrid montmorillonite-alginate beads (MABs) were prepared by the ion-gelation method from alginateand montmorillonite clay suspension dropped in a calcium chloride solution. Similarly, iron-enrichedbeads (Fe-MABs) were prepared using iron-exchanged montmorillonite. All beads were characterized byatomic absorption and Fourier-transform infrared spectroscopy. The efﬁciency of Fe-MABs as catalystsfor the solar photo-Fenton performed at initial pH = 7.0 was evaluated by varying the catalyst amountand hydrogen peroxide concentration, and monitoring the removal of 4-nitrophenol (4-NP) at initialconcentration of 10 ppm. A kinetic analysis showed that the removal of 4-NP by Fe-MABs followed apseudo ﬁrst-order kinetics model (R2 = 0.966).High 4-NP removal (75%) was achieved with 25 Fe-MABs by using 150 ppm of hydrogen peroxide and40 min of irradiation, while total 4-NP removal was obtained by using 500 ppm of hydrogen peroxide.Moreover, preliminary studies about beads’ recycling showed good removal efﬁciencies for the ﬁrst threecycles.
|Numero di pagine||8|
|Rivista||JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. A, CHEMISTRY|
|Stato di pubblicazione||Published - 2014|
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