A comparative study of neodymium sorption by yeast cells
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A. Vlachou
Abstract
An approximate comparison of neodymium sorption at pH=1.5, between the well studied Saccharomyces cerevisiae and three other related microorganisms ( Kluyveromyces marxianus , Candida colliculosa and Debaromyces hansenii ) was made. Although big differences were not observed, a slightly higher neodymium uptake was attained by the latter three kinds of yeasts. Their adsorption isotherms, varying the initial metal concentration from 10 to 200 mg/L, at constant ionic strength (I=0.1 mol/L), could be fitted equally well, either to Langmuir or Freundlich adsorption model. Their estimated values of qmax and Kf, which are related to adsorption capacity, ranged from 10−12 mg/g and 0.90–1.2 respectively. The corresponding Scatchard plots suggest two types of bonding sites for all yeast studied and common receptor sites between C. colliculosa and D. hansenii . It is also discussed, the feasibility of using all these microorganisms, as potential detoxification tools, wherever contamination of foodstuffs by radionuclides, seems to be probable.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- TRLFS study on the complexation of Cm(III) with nitrate in the temperature range from 5 to 200 °C
- Rapid method for the determination of actinides in soil and sediment samples by alpha spectrometry
- Gas chemical investigation of hafnium and zirconium complexes with hexafluoroacetylacetone using preseparated short-lived radioisotopes
- A robust biamperometric titration methodology for the determination of uranium by Ti(III) reduction in the presence of plutonium
- Preparation and characterization of Zr-IV-containing Mg-Al-Cl layered double hydroxide
- Radiation and chemical stability of calix[4]arene derivatives as prospective liquid-liquid extractants
- A comparative study of neodymium sorption by yeast cells
- A novel technique for modifier free delivery of ligands for supercritical fluid extraction
- Measurement of I-129 in environmental samples by ICP-CRI-QMS: possibilities and limitations
- Incorporation of iodine into uranophane formed during the corrosion of spent nuclear fuel
