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Humic acid
Items for "Humic acid"
A study on the metal binding of humic acid by multitracer technique
A method combining radioactive ‘multitracer’ and dialysis techniques was developed to study the binding of multiple metal ions to humic acid (HA)...
Keywords: Metal ions, Humic acid, Radioactive multitracer, Dialysis membrane
01/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagRemoval of mercury from water using pottery
In a previous study, the sorption of radiocobalt by powdered pottery materials was investigated. The use of these materials as immobilization matrix for liquid radioactive waste requires the employment of pottery vessels...
Keywords: Adsorption, Fulvic acid, Humic acid, Ion exchange, 203Hg
01/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagEffect of humic acid on cesium sorption on silica colloids
Effect of humic acid (HA) on the sorption behaviour of 137Cs on silica colloids has been studied by batch procedure over a pH range of 3-10 and at ionic strength of 0.05 M (NaClO4)...
Keywords: 137Cs, Silica colloids, Humic acid, Zeta-potential, Sorption
06/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagInfluence of soil humic acid and fulvic acid on sorption of thorium(IV) on MX-80 bentonite
Th(IV) is considered herein as a chemical analogue of other actinides (IV). Effect of pH, ionic strength and humic acid/fulvic acid concentrations on the sorption of thorium(IV) to MX-80 bentonite was studied by batch technique...
Keywords: Sorption, Bentonite, Thorium, Humic acid, Fulvic acid
08/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagInvestigation of complexation of thorium by humic acid using chemically immobilized humic acid on silica gel
To model the influence of humic substances on the migration of tetravalent actinides (Pu, Np, U) in and around nuclear waste repositories we have immobilized humic acid on silica gel and investigated its complexation of Th(IV)...
Keywords: Humic acid, Thorium, Conditional interaction constant (beta)
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagIodination of humic acid samples from different origins
The iodination of Gorleben and synthetic humic substances (HS) was studied complementarily by UV-visible and X-ray Photoelectron Spectroscopy (XPS)...
Keywords: Iodine, Humic acid, Iodination, Kinetics, Aromaticity
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagUranium(VI) sorption onto kaolinite in the presence and absence of humic acid
We studied the U(VI) sorption onto kaolinite in batch experiments in the absence and presence of humic acid (HA) under different experimental conditions: [U]0 = 1×10-6 M or 1×10-5 M, [HA]0=10 or 50 mg/L, I=0.1 M or 0.01 M NaClO4, pH=3–10, CO2 or N2 atmosphere...
Keywords: Uranium(VI), Sorption, Kaolinite, Humic acid
12/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagUranium(VI) complexation by humic acid under neutral pH conditions studied by laser-induced fluorescence spectroscopy
The complexation of U(VI) with Aldrich humic acid (HA) was studied at pH 7 under exclusion of CO2...
Keywords: Humic acid, Complexation, Uranium(VI), Ternary complexes, TRLFS
02/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSpeciation of the oxidation states of plutonium in aqueous solutions by UV/Vis spectroscopy, CE-ICP-MS and CE-RIMS
For the speciation of the plutonium oxidation states in aqueous solutions, the online coupling of capillary electrophoresis (CE) with inductively coupled plasma mass spectrometry (ICP-MS) has been developed...
Keywords: Plutonium speciation, Oxidation state, Humic acid, Fulvic acid, capillary electrophoresis
08/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagEffect of humic acid on sorption of neptunium on hematite colloids
Sorption of neptunium on hematite colloids has been studied at varying pH values (3–10) in absence and presence of humic acid using 239Np as a tracer...
Keywords: Neptunium, Humic acid, Hematite, Sorption, Speciation
09/2007 | Radiochimica Acta, Oldenbourg Wissenschaftsverlag