Functionalized Sugarcane Bagasse for U(VI) Adsorption from Acid and Alkaline Conditions

Abstract

The highly efficient removal of uranium from mine tailings effluent, radioactive wastewater and enrichment from seawater is of great significance for the development of nuclear industry. In this work, we prepared an efficient U(VI) adsorbent by EDTA modified sugarcane bagasse (MESB) with a simple process. Uranium is a vital commodity for nuclear energy, using as fuel for electricity generation. However, mine tailings effluent and wastewater from nuclear industry are seriously harmful for ecological and human health due to its radiochemical and toxicological 1,2 . Moreover, extraction of uranium from unconventional resource such as seawater, which is nearly 1000 times higher than that available in terrestrial ores 3,4 , has received recent attention. Hence, the highly efficient enrichment of uranium from mine tailings effluent, radioactive wastewater and seawater is of great significance for the development of nuclear industry. Among all kinds of extraction methods, such as adsorption 1,[5][6][7] , ion exchange [8][9][10] , chemical reduction 11,12 , biological processes 13,14 and membrane processes [15][16][17] , adsorption has been widely employed to enrich uranyl form aqueous due to its low cost, simple design, and ease of operation. Recently, various kinds of organic adsorbents (such as such as amidoxime [18][19][20] ) have been developed. However, few adsorbent could be applied in all of mine tailings effluent, radioactive wastewater and seawater. The extraction is limited by some reasons: (1) in seawater 36,37 , (2) the concentration of uranium is in a wide range concentrations (mg/L-μg/L), (3) there are large amount of competing metal ions, such as sodium, potassium, magnesium and calcium, and (4) adsorbent should have a great chemical and structural stability in both acidic (mine tailings effluent and radioactive wastewater) and alkaline (seawater) environment. Therefore, an adsorbent with remarkable adsorption properties and stability is necessary.Agricultural waste materials are of particular interest since they are produced in great amounts and available worldwide [38][39][40][41][42][43] . These materials represent an interesting and attractive alternative as biosorbents because of their physico-chemical characteristic, particular structure, chemical stability, and high reactivity resulting from the presence of abundance functional groups on the surface. Moreover, it is well known that agricultural waste materials are renewable and biodegradable. In the application of adsorption, the excellent performance of different

RETRACTED: A Sugarcane-Bagasse-Based Adsorbent Employed for Mitigating Eutrophication Threats and Producing Biodiesel Simultaneously

“…Of late, a fraction of this bagasse has been used as fuels in sugar factories, and some raw materials have been exploited in pulp and paper making. Sugarcane bagasse is a type of lignocellulosic biomass that generally consists of cellulose (50%), hemicellulose (25%), and lignin (25%) [13]. The hemicelluloses are made up of C5 and C6 sugar, while lignin comprises about one-fourth of the lignocellulose biomass.…”

Phosphorylated cellulose nanofibers exhibit exceptional capacity for uranium capture

“…Common techniques used for heavy metal extraction include membrane processes, ion exchange, adsorption, precipitation, and solvent extraction (Chen et al 2017;Xue et al 2017;Sarafraz et al 2017). As a low-cost, easily applicable alternative, adsorption has been considered promising for the removal of U(VI) from aqueous solutions (Su et al 2018). In such application, bioadsorbents are sought after given a number of advantages including costs, geographical availability and the possibility of metal recovery after incineration.…”

Magnetically Functionalized Moss Biomass as Biosorbent for Efficient Co2+ Ions and Thioflavin T Removal

“…The sharp peak at 2919 cm −1 corresponds to the asymmetric stretching vibration of C–H in the biopolymers (polysaccharides, lipids) ( Figure 4 , inset). The band at 1732 cm −1 is caused by symmetric stretching vibrations of C=O in esters, while the bands at 1606 and 1423 cm −1 correspond to the strong asymmetric and weak symmetric stretching of the carboxylate ion (COO − ) [ 20 , 21 ]. Intensity of these bands decreased after the magnetic modification ( Figure 4 ).…”