uranium thorium biosorption

Biosorption of uranium and thorium - ResearchGate

BIOSORPTION OF URANIUM AND THORIUM 587 uranium ions of positive or negative charge predominate while below pH 2.5 only the simple UOz2+ ion exists in

Biosorption of Uranium and Thorium by Biopolymers ...

2014-1-1 · Biosorption of uranium and thorium by Ca-alginate biopolymer beads. The removal of uranium and thorium ions from aquatic solutions is very important because of the chemical and radiotoxicity of these elements. Ca-alginate biopolymer beads have high potentiality to uptake of U and Th. As a result of alginate’s egg box structure, it has stable ...

Biosorption of uranium and thorium - Tsezos - 1981 ...

Biosorption isotherms have been used for the evaluation of biosorptive uptake capacity of the biomass which was also compared to an activated carbon and the ion exchange

(PDF) Biosorption of Uranium and Thorium. Ph.D. thesis

taining ions of high-atomic-number elements such as uranium, thorium, radium, etc. The study of biosorption of uranium and thorium is the sub-. ject of the present work.

Biosorption of uranium and thorium by Marine micro algae

2011-4-2 · BIOSORPTION OF URANIUM AND THORIUM BY MARINE MICRO ALGAE 123 then washed three times sterile distilled water and re-suspended in 10 ml water. A different volume of each cell suspension was added per ml of uranium or thorium solution, different algae cell concentrations ranging from 0.2–3 mg dry mass per ml were added ...

(PDF) Biosorption of uranium and thorium by Marine

Biosorption of uranium and thorium by Marine micro algae. IJMS, 2011. Siva Prasath. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Biosorption of uranium and thorium by Marine micro algae.

Competitive biosorption of thorium and uranium by ...

The adsorption of both thorium and uranium by Micrococcus luteus cells was rapid, was affected by the solution pH, and obeyed the Langmuir adsorption isotherm for binary systems in a competitive manner taking the ionic charge of the metal ion into account. The thorium selectivity in the competitive adsorption is assumed to be caused by the ...

Biosorption of rare earth elements, thorium and uranium ...

In order to evaluate the efficiency of shell biomass as sorbent for rare earth elements (REEs), thorium (Th) and uranium (U), sorption experiment from multi-element solutions containing known amount of REEs, Th and U using Buccinum tenuissimum shell was explored. F

The mechanism of thorium biosorption by Rhizopus

The mechanism of thorium sequestering by this biomass type was investigated following the same method as for the uranium biosorption emchanism. The thorium sequestering mechanism appeared somewhat different from that of uranium. Experimental evidence is presented which indicates that, at optimum biosorption pH (4), thorium coordinates with the ...

Biosorption of thorium (IV) by a Pseudomonas biomass ...

Tsezos M, Volesky B (1981) Biosorption of uranium and thorium. Biotechnol. Bioeng. 23: 583-604. Google Scholar Tsezos M, Volesky B (1982) The mechanism of thorium biosorption by Rhizopus arrhizus. Biotechnol. Bioeng. 24: 955-969. Google Scholar Volesky B, Schiewer S

Biosorption of uranium and thorium by Marine micro algae

2011-4-2 · BIOSORPTION OF URANIUM AND THORIUM BY MARINE MICRO ALGAE 123 then washed three times sterile distilled water and re-suspended in 10 ml water. A different volume of each cell suspension was added per ml of uranium or thorium solution, different algae cell concentrations ranging from 0.2–3 mg dry mass per ml were added ...

Biosorption of uranium and thorium, Biotechnology and ...

1981-3-1 · Biosorption isotherms have been used for the evaluation of biosorptive uptake capacity of the biomass which was also compared to an activated carbon and the ion exchange resin currently used in uranium production processes. Determined uranium and thorium biosorption isotherms were independent of the initial U or Th solution concentration.

Biosorption characteristics of uranium(VI) and thorium(IV ...

The CaCl2-modified Giant Kelp biomass (Ca-GK) showed a higher adsorption capacity for U(VI) and Th(IV) ions than the unmodified biomass. FTIR analysis indicates that carboxylic (as main adsorption sites), hydroxyl, sulfonate, and amino groups are responsible for U(VI) and Th(IV) adsorption. The kinetic analysis indicates that the rate-limiting step is the chemical sorption process. The maximum ...

The mechanism of uranium biosorption by Rhizopus

2021-8-29 · The mechanism of thorium sequestering by this biomass type was investigated following the same method as for the uranium biosorption emchanism. The thorium sequestering mechanism appeared somewhat different from that of uranium. Experimental evidence is presented which indicates that, at optimum biosorption pH (4), thorium coordinates with the ...

Biosorption of rare earth elements, thorium and uranium ...

In order to evaluate the efficiency of shell biomass as sorbent for rare earth elements (REEs), thorium (Th) and uranium (U), sorption experiment from multi-element solutions containing known amount of REEs, Th and U using Buccinum tenuissimum shell was explored. F

Uranium (VI) Biosorption on Marine Sponge, Sarcotragus ...

2016-12-6 · The biosorption of heavy metals, radionuclides, uranium and thorium for the recovery or removal from aqueous systems using various micro-organisms and biological substances has been investigated by several groups of workers.

BIOSORPTION OF URANIUM ON SARGASSUM BIOMASS

2006-10-18 · radium, thorium and uranium has been known for long time (Edgington et al., 1970), the biosorption of uranium by non-living marine algae has rarely been reported. Marine algae proliferate ubiquitously and abundantly in the litoral zones of world oceans, they are rather stable and fast growing. The bio-sorption capacity of the non-living marine ...

Accumulation of Thorium and Uranium by Microbes –

2010-10-13 · In these high performance thorium- and uranium-accumulating microorganisms, S. levoris, which accu-mulated the largest amount of uranium from the solution containing only uranium at pH 3.5, accumulated about 300 µmol thorium and 133 µmol uranium per gram dry weight of microbial cells from a solution containing both thorium and uranium at pH 3.5.

Adsorption of Uranium(VI) from Aqueous Solution by ...

The biosorption is an effective and economical method to deal with the wastewater with low concentrations of uranium. In this study, we present a systematic investigation of the adsorption properties, such as the kinetics, thermodynamics, and mechanisms, of modified rice stems. The rice stems treated with 0.5 mol/L NaOH solutions show higher removal percentage of uranium

周利民 - 东华理工大学 - 化学生物与材料科学学院

(2) Limin Zhou*, Yun Wang, Hongbin Zou, Xizhen Liang, Kai Zeng, Zhirong Liu, Adesoji A. Adesina, Biosorption characteristics of uranium(VI) and thorium(IV) ions from aqueous solution using CaCl2-modified Giant Kelp biomass, Journal

Biosorption of rare earth elements, thorium and uranium ...

In order to evaluate the efficiency of shell biomass as sorbent for rare earth elements (REEs), thorium (Th) and uranium (U), sorption experiment from multi-element solutions containing known amount of REEs, Th and U using Buccinum tenuissimum shell was explored. F

Biosorption characteristics of uranium(VI) and thorium(IV ...

The CaCl2-modified Giant Kelp biomass (Ca-GK) showed a higher adsorption capacity for U(VI) and Th(IV) ions than the unmodified biomass. FTIR analysis indicates that carboxylic (as main adsorption sites), hydroxyl, sulfonate, and amino groups are responsible for U(VI) and Th(IV) adsorption. The kinetic analysis indicates that the rate-limiting step is the chemical sorption process. The maximum ...

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

2011-2-21 · Biosorption of uranium (VI) and thorium (IV) onto Ulva gigantea (Kützing) bliding: discussion of adsorption isotherms, kinetics and thermodynamic Authors: Serap Bozkurt 1 , Zehra Molu 2 , Levent Cavas 1 , and Melek Merdivan 1 View More View Less. 1 ...

Uranium (VI) Biosorption on Marine Sponge, Sarcotragus ...

2016-12-6 · The biosorption of heavy metals, radionuclides, uranium and thorium for the recovery or removal from aqueous systems using various micro-organisms and biological substances has been investigated by several groups of workers.

BIOSORPTION OF URANIUM ON SARGASSUM BIOMASS

2006-10-18 · radium, thorium and uranium has been known for long time (Edgington et al., 1970), the biosorption of uranium by non-living marine algae has rarely been reported. Marine algae proliferate ubiquitously and abundantly in the litoral zones of world oceans, they are rather stable and fast growing. The bio-sorption capacity of the non-living marine ...

Biosorption of thorium from aqueous solution by Ca ...

2014-1-27 · such as uranium (VI), nickel (II) and copper (II) on thorium bio-sorption process. Equilibrium isotherm, kinetic and thermodynamic parameters were also determined and the effective functional groups that participate in thorium biosorption were characterized using FT-IR analysis. MATERIALS AND METHODS 1. Biomass Preparation

Uranium biosorption from aqueous solution by the

2016-12-23 · In the past decades, much effort has been devoted to the biosorption of uranium by using the biomass of various algae or aquatic plant species, such as brown algae (Moghaddam et al. 2013), Cystoseira indica (Keshtkar et al. 2012), Padina sp.(), and water hyacinth (Bhainsa & D'Souza 2001)Hydrilla verticillata is a submersed perennial aquatic macrophyte that commonly grows in

Nuclear Waste Bioremediation - Stanford University

2016-8-2 · In yet another study on uranium bioremediation, Kazy et al. describe the study of a Pseudomonas strain capable of intracellularly sequestering uranium and thorium ions (a phenomenon known as biosorption), radioactive species commonly found in waste generated by nuclear energy and nuclear weapon testing. [9] Through transmission electron ...

Accumulation of Thorium and Uranium by Microbes –

2010-10-13 · In these high performance thorium- and uranium-accumulating microorganisms, S. levoris, which accu-mulated the largest amount of uranium from the solution containing only uranium at pH 3.5, accumulated about 300 µmol thorium and 133 µmol uranium per gram dry weight of microbial cells from a solution containing both thorium and uranium at pH 3.5.

周利民 - 东华理工大学 - 化学生物与材料科学学院

(2) Limin Zhou*, Yun Wang, Hongbin Zou, Xizhen Liang, Kai Zeng, Zhirong Liu, Adesoji A. Adesina, Biosorption characteristics of uranium(VI) and thorium(IV) ions from aqueous solution using CaCl2-modified Giant Kelp biomass, Journal

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