Purification of Waste Water Using Alumina as Catalysts Support and as an Adsorbent

Iron–alumina synergy in the heterogeneous Fenton-type peroxidation of phenol solutions

“…After the impregnation process, alumina has been reported to play an essential part in the formation of active sites. This support is also able to adsorb reactants in the course of reactions and this may be beneficial for the catalytic activity and selectivity [18].…”

Recovery of Metal Ions from Aqueous Solutions by γ-Alumina Creates Value-Added Catalyst Products

“…Thus, Cu 2+ ions could be reduced when a Cu 2+ -containing solution is in contact with alumina. Moreover, in the presence of halide species such as chloride (from metal precursor), pitting corrosion occurs as a result of the Al passive film breakdown, , allowing a galvanic replacement reaction on the alumina. Similarly, when Pd 2+ ions were introduced to the column, the galvanic replacement reaction occurred, and metallic Pd formed due to the strong reaction driving force resulting from the difference in reduction potential between the Pd 2+ /Pd (+0.92 V vs SHE) and Al 3+ /Al couples (−1.67 V vs SHE) (Figure ).…”

Catalytic hydrodechlorination of p-chloro-m-cresol and 2,4,6-trichlorophenol with Pd and Rh supported on Al-pillared clays

“…These clay-based materials have different advantages, like thermal and mechanical stability, easy preparation and versatility [29] showing a higher stability in acid media than alumina and higher resistance at high temperatures in air or H 2 atmosphere than carbon supports. The metals impregnated on the clay materials present a strong interaction with the support so that leaching is almost negligible compared with other supports [30]. The hydrophilic nature of clay materials also provides different affinity in aqueous media with respect to hydrophobic materials, like carbon, where aromatic pollutants can remain adsorbed upon the reaction [31].…”