Study on adsorption characteristics of uranyl ions from aqueous solutions using zirconium hydroxide

Abstract

The removal of uranyl ions from aqueous solutions using Zr(OH) 4 Á3.35H 2 O (ZH) as adsorbent was investigated using a batch adsorption technique. The maximum removal rate was found as 451.7 mg UO 2 2? Ág -1 ZH. The adsorption capacity and adsorption rate of the calcinated products gradually decreases with increasing calcination temperature. The hydroxyl groups in the zirconium hydroxide play an important role for the adsorption uranyl ions, which agree well with the thermogravimetric analysis of zirconium hydroxide for completely dehydration at 700°C. The observed data shows that the adsorption process is dependent on surface complexation mechanism.

Shortening synthesis process of zirconium hydroxide as a hydrolysis product of sodium zirconate

“…Recently, amorphous zirconium hydroxide compounds (Zr(OH)4) have been introduced to replace activated carbon for absorbing toxic agents (Glover et al, 2012;Peterson et al, 2010;Peterson & Rossin, 2012;Singh et al, 2012). Researchers in the waste industry found out that Zr(OH)4 can be used to recover uranyl ions in solution (Liu et al, 2015) and excess fluoride in drinking water (Dou et al, 2012). As there are many advantages of Zr(OH)4, there is a need to produce this material using the most effective method.…”

Preparation of a novel polyacrylic acid and chitosan interpenetrating network hydrogel for removal of U(vi) from aqueous solutions

“…There are many physical and chemical methods for removal of uranium from wastewater including instance ion-exchange processes, 2 solvent extraction, 3 surface complexation, and adsorption. [4][5][6] Adsorption has been used by many plants and enterprises because of its excellent performance, easy operation, low consumption, high efficiency, and environmental friendliness. [7][8][9][10] A variety of materials have been extensively studied for adsorption.…”