Biochar derived from Salvadora persica branches biomass as low-cost adsorbent for removal of uranium(VI) and thorium(IV) from water

Albayari, Mohammad; Nazal, Mazen K.; Khalili, Fawwaz I.; Nordin, Norazah; Adnan, Rohana

doi:10.1007/s10967-021-07667-2

Cited by 22 publications

(2 citation statements)

References 42 publications

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“…However, Th, despite being stable at a +IV valence state at an ambient temperature, shows potentially low toxic effects compared to U(VI), 14 thereupon posing health risks because of its propensity to deposit in body tissues, 15 as the salt of thorium nitrate penetrates the living body. It mostly settles in the reticuloendothelial system, i.e., spleen, bone marrow, and liver, forming a precipitate of hydroxyl ions; it may also affect brain, 16 lungs, 17 kidneys, 18 and bones, 19 hence causing a threat to the survival of living beings.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous Adsorption of Th(IV) and U(VI) Ions from Aqueous Solutions by a Tannic-Acid-Modified Nanomagnetite Adsorbent

Sharma,

Dhiware,

Sharma

et al. 2023

ACS Appl. Eng. Mater.

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Nuclear wastewater remediation provides an intriguing opportunity to successfully remove and recover radioactive elements, especially Th(IV) and U(VI) ions, since they play a crucial role as nuclear fuel and pose a significant threat to the sustainability of the environment. In the present investigation, magnetic nanoparticles were modified by a polyphenolic compound, tannic acid (TA), to develop a tannic acid@magnetite (TA@Fe3O4) nanocomposite for effective adsorption of Th(IV) and U(VI) ions from wastewater. To more accurately predict the effective adsorption of the ions, adsorbents varying in the mass ratio of TA and Fe3O4 were synthesized, and also the practical utility of the adsorbent was evaluated by employing batch adsorption studies under the conditions of pH, adsorbent dosage, contact time, and initial concentration. The maximum removal efficiency, i.e., 99.42% and 92.63% for Th(IV) and U(VI) ions, respectively, was obtained with a 1:2 ratio of TA@Fe3O4 at pH 6 with 6 mg of absorbent dosage of 10 mL of 50 ppm thorium and uranium solution in 20 min. Further, the experimental data were attributed to the isotherms and kinetic models, corresponding the adsorption system with the Langmuir model of the isotherm and pseudo-second-order kinetics, thus revealing the monolayer chemisorption process of adsorption for both ions. The TA@Fe3O4 nanocomposite exhibited high recyclability with seven adsorption–desorption cycles via magnetic separation, indicating its potential application in wastewater treatment. Hence, on the basis of facile, low-cost precursors for large-scale manufacturing and excellent recyclability, this work presents a potential and promising strategy of the TA@Fe3O4 nanocomposite for enhanced removal of radionuclides for wastewater reclamation.

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Section: Introductionmentioning

confidence: 99%

“…It mostly settles in the reticuloendothelial system, i.e. , spleen, bone marrow, and liver, forming a precipitate of hydroxyl ions; it may also affect brain, lungs, kidneys, and bones, hence causing a threat to the survival of living beings.…”

Section: Introductionmentioning

confidence: 99%