Competitive adsorption of molybdate, chromate, sulfate, selenate, and selenite on γ-Al2O3

Modeling Competitive Adsorption of Molybdate, Sulfate, and Selenate on γ-Al2O3 by the Triple-Layer Model

“…The study discussed here is an extension of the kinetic studies on molybdate, sulfate, and selenate on γ -Al 2 O 3 and our previous paper (7,8,17) on the competitive adsorption systems of molybdate, sulfate, and selenate. The objectives of this study were to (i) determine the extent of competitive adsorption between molybdate, sulfate, and selenate on γ -Al 2 O 3 as a function of pH and (ii) ascertain the accuracy of the triple-layer model (TLM) in predicting adsorption in competitive adsorption systems for a wide range of pH values.…”

“…Similar results were inferred by Hingston et al (24) and Violante et al (25), who found that, in mixed phosphate plus arsenate or phosphate plus selenite or phosphate plus oxalate systems, it is possible to occupy more sites with anions than when either ion is present alone. Figure 4 shows the competitive adsorption for mixtures of MoO (17) suggested that a larger value of the overall proton coefficient corresponds to a higher affinity for the oxide surface. This research found the relative retention of anions on γ -Al 2 O 3 surface to be molybdate > selenate > sulfate, which agrees with the findings of Wu et al (17).…”

“…Figure 4 shows the competitive adsorption for mixtures of MoO (17) suggested that a larger value of the overall proton coefficient corresponds to a higher affinity for the oxide surface. This research found the relative retention of anions on γ -Al 2 O 3 surface to be molybdate > selenate > sulfate, which agrees with the findings of Wu et al (17).…”

Selenium mobilization in soils due to volcanic derived acid rain: An example from Mt Etna volcano, Sicily

“…Sulphate is especially competitive with selenate for adsorption sites (Wu et al, 2000). Therefore, in this case rain SO 4 2− concentration will be a key parameter controlling desorption of selenate (SeO 4…”

ELECTRO-DEIONIZATION OF Cr (VI)-CONTAINING SOLUTION. PART I: CHROMIUM TRANSPORT THROUGH GRANULATED INORGANIC ION-EXCHANGER

“…Moreover, they are characterized by a high ion-exchange capacity and their selectivity for toxic anions (Wu et al, 2000;Kabengi et al, 2006;Foster et al, 2003;Geelhoed et al, 2002), like organic sorption materials of core-shell type (Kabay et al, 2003(Kabay et al, , 2005Saha et al, 2004). It should be also noted that inorganic ion-exchanger materials are relatively cheap and can be obtained and modified rather easily.…”