The use of rice and coffee husks for biosorption of U (total), 241Am, and 137Cs in radioactive liquid organic waste

An adsorption agent based on chitosan–zeolite composite: environmental and radioactive liquid waste remediation

“…Note that these differences may be due to the different characteristics of the LORW solutions used. For instance, the concentration of these radionuclides in this work are different from those found by Ferreira et al , 5 especially americium (10-fold lower in our work) and uranium (2-fold higher in our work). Compared to published work on caesium removal, NaX–chitosan shows itself to be an attractive material for this element.…”

“…There are few works in the literature in which the biosorption of caesium, americium, and uranium has been evaluated, particularly in the presence of other radionuclides at lower concentrations, organic content, and low pH. Ferreira et al 5 employed rice and coffee husks for the biosorption of these radionuclides also in real radioactive organic waste. The authors found a lower adsorption capacity (∼8-fold) for 137 Cs (4.66 × 10 −8 mg g −1 ) but higher capacities (∼14-fold) for U (total) (1.96 mg g −1 ) and 241 Am (∼4-fold) (3.94 × 10 −5 mg g −1 ).…”

“…3,4 In addition to being a concern in nuclear accidents, 137 Cs is routinely found in the radioactive waste from nuclear operations. 5,6 Furthermore, industries, hospitals, and research institutions produce wastewater contaminated with this radionuclide. 7,8…”

Biosorption: A Review of the Latest Advances

“…Including uranium, the biosorption technique has recently been shown to be useful for removing metals from radioactive liquid organic waste. Rice and coffee husks (raw and chemically activated) were examined regarding their capacity to remove U(total), 241 Am and 137 Cs, demonstrating that these materials can be used for the treatment of this waste [110].…”

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

“…Uranium is an emblematic example of hazardous metals that require removal from contaminated effluents and underground water; in addition, the demand on uranium for feeding the nuclear power industry is another motivation for designing such new materials. Biosorption has attracted a great deal of attention over the last decades for the removal of metal ions from water [7][8][9]. Mimicking the conventional industrial resins that were designed with specific functional groups, biosorption aims to use bio-based materials (biomass, biopolymers) naturally bearing analogue functional groups (as those bear by industrial resins), chemically modified by grafting specific reactive groups, or composites based on biopolymers [10,11].…”