Production, separation and speciation of no-carrier-added Hg radionuclides using greener methodologies
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S. Mandal
Abstract
Species dependent studies of no-carrier-added (nca) mercury were carried out using radioanalytical technique coupled with two greener analytical methodologies. The adsorption of nca 195m,gHg and 197mHg radionuclides on chitosan biopolymer and cloud point extraction (CPE) was studied to develop environmentally sustainable speciation methodologies at ultra trace level. Species information was obtained by comparing the adsorption profile of nca radiomercury on chitosan biopolymer with the software code CHEAQS PRO. Results obtained from the adsorption study were validated by CPE technique using non ionic surfactant and mixed micelle. Both the experiments established that nca Hg existed as Hg(II). The experimental results support the presence of HgCl2 species over the pH range 2–4, whereas Hg(OH)2 is the main species over the pH range 6–8. Chitosan biopolymer and mixed micelle [Triton-X-114 and cetyltrimethylammonium bromide (CTAB)] constitute an efficient reagent for the preconcentration of ultra trace level mercury.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Experimental cross section for the 139La(n, γ)140La reaction at 0.0536 eV
- Ion-exchange behavior of Zr and Hf as homologues of element 104, Rf, in H2SO4 and H2SO4/HClO4 mixed solutions
- Effect of ionic strength on complexation of Pu(IV) with humic acid
- Sorption of Eu(III) and Am(III) on attapulgite: effect of pH, ionic strength and fulvic acid
- Factors influencing plutonium sorption in shale media
- The reduction of Np(VI) and Np(V) by tit dihydroxyurea and its application to the U/Np separation in the PUREX process
- Synthesis and characterization of a new activated carbon supported ammonium molybdophosphate composite and its cesium-selective adsorption properties
- Production, separation and speciation of no-carrier-added Hg radionuclides using greener methodologies
- Study of transfer of minor elements during ironmaking by neutron activation analysis
