Biosorption of Radioactive Thorium by Sargassum filipendula

Abstract

In the present work, the biosorption of radioactive thorium was investigated using a dry biomass of Sargassum filipendula as the biosorbent material. Radioactive solutions containing between 2.0 and 500.0 microg thorium were tested by biosorption with S. filipendula, yielding uptake capacities from 20 to 100%, depending on the concentration of the solution. Kinetic studies indicated that equilibrium between the thorium solution and the solid fraction was achieved after three hours of contact and that a second-order model could express the equilibrium kinetics. In order to investigate the maximum biosorption capacity of the biomass an isotherm was done, based on the experimental data, which revealed the maximum uptake capacity to be 2.59 micromol thorium/g biomass. The experimental data fitted well to a Langmuir model, which provided a good correlation between the experimental and predicted thorium uptake values.

Mercury(II) Biosorption Using Lessonia sp. Kelp

“…It consists in using materials of biological origin for the sorption of metal ions from dilute solutions. A number of biomass have been tested for metal recovery, including fungi [9][10][11][12], bacteria [13], yeasts, and algae [14][15][16][17][18] but also biopolymers such as chitin and chitosan (derived from fungal biomass or crustacean shells) [6] and alginate (derived from algal biomass) [19]. These processes use the reactive groups present at the surface of the microorganisms for the binding of metal ions as it occurs with ion exchange and chelating resins.…”

The Growth ofMonoraphidiumsp. andScenedesmussp. Cells in the Presence of Thorium

“…Thus, the comparison of the present work with the published literature was not possible, making these results very particular. However, the literature reports the use of seaweeds for the biosorption or uranium and thorium [4, 13–15]. In those papers, seaweeds were used as inactivated biomass, under batch and continuous conditions, with the purpose of treating effluents containing radionuclides.…”

Cystoseira barbata İle Toryum Biyosorpsiyonu

“…Bu çalışmalarda kesikli ekstraksiyon yöntemi uygulanmış ve denemelerde, pH, sıcaklık, derişim gibi faktörlerin etkileri incelenmiştir. Atık sularda bulunan Th (IV) iyonlarının alg kullanarak giderilmesine yönelik de pek çok çalışma bulunmaktadır [20][21][22][23][24]. Toryum (Th), hem çevresel etkilerinden dolayı, hem de endüstriyel uygulamaları açısından, en tehlikeli ağır metallerden birisidir [1,25].…”