Batch study of uranium biosorption by Elodea canadensis biomass

Abstract

The adsorption of U(VI) onto Elodea canadensis was studied via a batch equilibrium method. Kinetic investigation indicated that the U(VI) adsorption by E. canadensis reached an equilibrium in 120 min and followed pseudo-second-order kinetics. The solution pH was the most important parameter controlling adsorption of U(VI) and the optimum pH for U(VI) removal is 6.0. The U(VI) biosorption can be well described by Langmuir model. IR spectrum analysis revealed that -NH 2 , -OH, C=O and C-O could bind strongly with U(VI). XPS spectrum analysis implied that ion exchange and coordination mechanism could be involved in the U(VI) biosorption process.

Pyrolytic temperature evaluation of macauba biochar for uranium adsorption from aqueous solutions

“…In addition, the two remaining sp 3 orbitals can be occupied by two solitary pairs of electrons for the O atom. These solitary pairs of electrons can bind with the positively charged uranyl ions, thereby promoting the occurrence of the chemisorption [72].…”

Biogeochemistry of uranium in the soil-plant and water-plant systems in an old uranium mine

“…Various remediation methods exist that include chemical, physical, and biological technologies (e.g., Bhalara et al, 2014). Among these, microbiological remediation (e.g., Acharya et al, 2009;Campbell et al, 2015;Groudev et al, 2008;Newsome et al, 2014), phytoremediation (e.g., Ebbs et al, 1998;Malaviya and Singh, 2012;Stojanović et al, 2016;Vandenhove et al, 2001), and biosorption (e.g., Bhainsa and D'Souza, 2001;Hu et al, 1996;Li et al, 2004;Wang et al, 2010;Yi et al, 2016aYi et al, , 2016b has been increasingly considered as a potential alternative way to remove U from industrial and mining effluents. Several plant species and/or derived biomaterials have been studied for U biosorption from contaminated water (e.g., Al-Masri et al, 2010;Bhainsa and D'Souza, 2001;Parab et al, 2005;Yi et al, 2016aYi et al, , 2016b.…”

“…Among these, microbiological remediation (e.g., Acharya et al, 2009;Campbell et al, 2015;Groudev et al, 2008;Newsome et al, 2014), phytoremediation (e.g., Ebbs et al, 1998;Malaviya and Singh, 2012;Stojanović et al, 2016;Vandenhove et al, 2001), and biosorption (e.g., Bhainsa and D'Souza, 2001;Hu et al, 1996;Li et al, 2004;Wang et al, 2010;Yi et al, 2016aYi et al, , 2016b has been increasingly considered as a potential alternative way to remove U from industrial and mining effluents. Several plant species and/or derived biomaterials have been studied for U biosorption from contaminated water (e.g., Al-Masri et al, 2010;Bhainsa and D'Souza, 2001;Parab et al, 2005;Yi et al, 2016aYi et al, , 2016b. Besides the plant derived biomaterials, studies have also been performed on U biosorption by filamentous fungi (e.g., Akhtar et al, 2009;Pang et al, 2011;Wang et al, 2010), yeast (e.g., Bai et al, 2010), algae (e.g., Bhat et al, 2008) and bacteria (e.g., Hu et al, 1996;Li et al, 2004).…”

Decontamination of Uranium-Polluted Groundwater by Chemically-Enhanced, Sawdust-Activated Carbon

“…Equation (13) gives the linear form of the Freundlich model. The adsorption data of U(VI) ions at 25 • C were tested according to the Freundlich model and the values of the Freundlich parameters were calculated and illustrated in (Table 1).…”

“…The chemistry of uranium in aqueous solutions is governed by the dioxocation UO 6 ] 6− may also be formed with different concentrations depending on the pH and the total concentration of U(VI) [5][6][7]. Several techniques are used for removal of uranium and trace metals from water, e.g., biotechnology (including agricultural wastes), solvent extraction, coagulation, reduction, ion exchange, reverse osmosis, flocculation, electrochemical and adsorption [8][9][10][11][12][13]. However, most of these techniques have some difficulties such as incomplete metal removal (poor efficiency), high reagent and energy requirements, and large quantities of resulting wastes that are difficult to dispose of, as well as the generation of toxic waste products.…”