Uranium removal from acidic aqueous solutions by Saccharomyces cerevisiae, Debaryomyces hansenii, Kluyveromyces marxianus and Candida colliculosa

Removal of Platinum and Palladium from Wastewater by Means of Biosorption on Fungi Aspergillus sp. and Yeast Saccharomyces sp.

“…immobilized on cone biomass was positive at pH 2.0 and the overall surface of the biomass was negatively charged at the pH values between 3.0 and 7.0 [47]. Other studies [48] have shown, that the surface of free cells of yeast was negatively charged for pH higher than 3.5 favoring adsorption of cationic species. Lower sorption of Pt(IV) and Pd(II) observed in strong acidic medium is an effect of competing of chloride ions and anionic chlorocomplexes of platinum and palladium present in the solution for the protonated functional groups of yeast's cell wall.…”

Removal of Toxic Materials from Aqueous Streams

“…In addition to alga, other aquatic plants have been used, like aquatic moss Fontinalis antipyretica for the removal of Zn and Cd [118]. Some yeasts have been used for the removal of uranium from aqueous solutions, like S. cerevisiae, Debaryomyces hansenii, Kluyveromyces marxianus, and Candida colliculosa [119].…”

U(VI) adsorption onto cetyltrimethylammonium bromide modified bentonite in the presence of U(VI)-CO3 complexes

“…In a word, uranium exists mainly as the anions in salt lake brines or seawater, different from uranyl ions as UO 2 2+ in the acidic pH or as a precipitated state at higher pH values in the absence of inorganic ligands like carbonates and phosphates (Acharya et al, 2009;Wang et al, 2014;Zhang et al, 2015a). Obviously, more studies are needed to investigate the possible materials or methods for uranium adsorption under alkaline pH values, even enormous materials have been explored for uranium adsorption in the acidic pH until now (Tsuruta, 2004;Sarri et al, 2009;Turanov et al, 2013). U(VI)-CO 3 complexes effect on U(VI) adsorption by adsorbents should be taken into consideration firstly when materials were used for seawater or salt lake brines uranium extraction, because it's preferable to operate in situ without any manipulation of the chemical condition of seawater during the separation process.…”