Entrapment of brown seaweeds (Turbinaria conoides and Sargassum wightii) in polysulfone matrices for the removal of praseodymium ions from aqueous solutions

doi:10.1016/S1002-0721(14)60546-9

Journal of Rare Earths

Volume 33, Issue 11, November 2015, Pages 1196-1203

https://doi.org/10.1016/S1002-0721(14)60546-9 Get rights and content

Abstract

The aim of the present investigation was to study the potential of two brown seaweeds (Sargassum wightii and Turbinaria conoides) to remove praseodymium ions from solutions. Due to swelling problems, the seaweed biomasses were also immobilized using polysulfone matrices which amplified hydraulic conductivity more than 7.1 times. At optimum pH of 5, maximum Pr(III) uptakes of 131.4, 146.4, 111.2 and 119.5 mg/g were observed for free-S. wightii, free-T. conoides, polysulfone immobilized S. wightii (PISW) and polysulfone immobilized T. conoides (PITC), respectively. Experimental biosorption isotherms were successfully described using the Langmuir, Freundlich and Sips model. Owing to intraparticle diffusion, rate of Pr(III) sorption by immobilized biosorbents was slow and equilibrium attainment took 240 min compared to only 90 min by free biomasses. However, regeneration of seaweed biomasses for repeated sorption application was only possible with immobilization biosorbents. With 0.1 mol/L HCl as elutant, both PITC and PISW exhibited invariable Pr(III) uptake capacity and very high mechanical stability over 10 sorption-desorption cycles.

Graphical Abstract

Scanning electron microscopy photograph of polysulfone immobilized T. conoides

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: Foundation item: Project supported by Ramalingaswami Re-entry Fellowship from Department of Biotechnology, Ministry of India, India

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Entrapment of brown seaweeds (Turbinaria conoides and Sargassum wightii) in polysulfone matrices for the removal of praseodymium ions from aqueous solutions

Abstract

Graphical Abstract

J. Rare Earths

J. Rare Earths

Desalination

Biotechnol. Adv.

J. Rare Earths

Water Res.

Water Res.

J. Hazard. Mater.

J. Hazard. Mater.

Desalination

J. Water Proc. Eng.

Appl. Geochem.

Proc. Biochem.

The characteristics, occurrence and geochemical behavior of rare earth elements in the environment: a review

Crit. Rev. Environ. Sci. Technol.

Mechanical properties of the A356 aluminum alloy modified with La/Ce

J. Rare Earths

Trivalent Metal (Cr, Y, Rh, La, Pr, Gd) Sorption in two acid soils and its consequences for bioremediation

Eur. J. Soil Sci.