uranium thorium biosorption

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  Biosorption of uranium(VI) and thorium(IV) from …

  202374 · Studies show that exposure to uranium can lead to renal harm and kidney malfunction. Thorium has both heavy metal and radi- oactive toxicity, so thorium is considered a hazardous pollut- ant that could cause several diseases if it reaches and enters the human body.

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  Biosorption of uranium (VI) and thorium (IV) onto Ulva …

  2017825 · Introduction Thorium and uranium are toxic radioactive elements, U(VI) and Th(IV) is representative of hexavalent and tetravalent actinides. The toxic nature of these radionuclides, even at trace levels, has been a public health problem for many years [1]. The main sources of uranium are soils, tailings of some minerals processing activities, black …

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  Biosorption of uranium (VI) from aqueous solution using calcium ...

  2009830 · Then the residual uranium (VI) ions in aqueous solution were determined spectrophotometrically using PAR (1- (2-pyridylazo-resorcinol)) method at 510 nm using spectrophotometer [29]. The amount of adsorbed uranium (VI) was calculated from the difference of the uranium concentration in aqueous solution before and after adsorption.

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  Biosorption of thorium (IV) by a Pseudomonas biomass

  200221 · The high biosorption of thorium on biomass at pH>5.0 can also be attributed to the partial precipitation or coprecipitation of Th (IV) owing to the predominated hydrolyzed thorium species at high ...

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  Uranium and Thorium Retention onto Sorbents from Raw …

  20211014 · Pomegranate peel was investigated as biosorbent to remove uranium as well as thorium from aqueous solutions under different experimental conditions (concentration, counter ions, temperature). The material was used in raw and modified form after treatment with acidic and alkaline solutions to increase its sorption capacity. …

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  Biosorption of uranium and thorium -

  Determined uranium and thorium biosorption isotherms were independent of the initial U or Th solution concentration. Solution pH affected the exhibited uptake. In general, lower biosorptive uptake was exhibited at pH 2 than at pH 4.

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  The mechanism of uranium biosorption by Rhizopus arrhizus

  The mechanism of uranium sequestering by this type of biomass was studied by using experimental techniques such as electron microscopy, x-ray energy dispersion analysis, IR spectroscopy, and supporting evidence was obtained for a biosorption mechanism consisting of at least three processes.

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  Biosorption of thorium(IV) from aqueous solution by living …

  2015317 · The uranium (VI) accumulation was studied in detail by using the biomass of mangrove endophytic fungus Fusarium sp.#ZZF51 from the South China Sea and it was obtained that the Langmuir isotherm model and the pseudo-second-order kinetic model provided better correlation with the experimental data for adsorption of uranium ( VI.

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  Effect of pH on uranium(VI) biosorption and …

  The FTIR study combined with biosorption experiments indicated that the thorium distribution and binding behavior on cell surface were associated with amino, hydroxyl groups and phosphate or sulphur functional groups, and might also be governed by electrostatic interaction.

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  Competitive Biosorption of Thorium and Uranium by Actinomycetes

  2014827 · The competitive biosorption of thorium and uranium by actinomycetes was examined. Of the actinomycetes tested, Streptomyces levoris showed the highest ability to sorb both thorium and uranium from ...

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