Characterization of humic and fulvic acids from Gorleben groundwater

Kim, J. I.; Buckau, G.; Li, G. H.; Duschner, H.; Psarros, Nikos

doi:10.1007/bf00323017

Cited by 201 publications

(138 citation statements)

References 6 publications

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“…Our results are smaller than those in previous studies, except for purified AHA (Stookey, 1970;Kim et al, 1990). Even after purification, HA contains Fe at a high concentration.…”

Section: Iron and Al In Hacontrasting

confidence: 98%

“…The variation in logβ M-HS with the REE loading level was observed in cases of injection of single and multiple REE(s) into the experimental system. This variation is consistent with previous studies on Eu-HA complexation Kubota et al, 2002 *Stookey (1970); ** Kim et al (1990). Purification procedure of Aldrich humic acid (AHA) was followed Kim et al (1990) Tochiyama et al, 2004).…”

Section: Iron and Al In Hasupporting

confidence: 90%

“…This variation is consistent with previous studies on Eu-HA complexation Kubota et al, 2002 *Stookey (1970); ** Kim et al (1990). Purification procedure of Aldrich humic acid (AHA) was followed Kim et al (1990) Tochiyama et al, 2004). In the case of the multi-REE system, however, logβ M-HS of some LREEs (La, Pr, and Nd) increase with the REE loading level at the lower REE loading region (Fig.…”

Section: Iron and Al In Hasupporting

confidence: 89%

“…HSs originally contain Fe and Al at a high concentration depending on the extraction and purification methods of HSs (Stookey, 1970;Kim et al, 1990;Yamamoto et al, 2009). Yamamoto et al (2009) reported that Fe exists as ferric carboxylate complexes in SRHA, which inhibits complexation of target ions and HA.…”

Section: Fig 1 Ree Patterns Of Logk Ma For Ha (A) Leonardite Coal mentioning

confidence: 99%

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Systematic change in relative stabilities of REE-humic complexes at various metal loading levels

2010

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“…Our results are smaller than those in previous studies, except for purified AHA (Stookey, 1970;Kim et al, 1990). Even after purification, HA contains Fe at a high concentration.…”

Section: Iron and Al In Hacontrasting

confidence: 98%

Section: Iron and Al In Hasupporting

confidence: 90%

Section: Iron and Al In Hasupporting

confidence: 89%

Section: Fig 1 Ree Patterns Of Logk Ma For Ha (A) Leonardite Coal mentioning

confidence: 99%

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Systematic change in relative stabilities of REE-humic complexes at various metal loading levels

2010

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“…humic acid in sodium form was purified prior to use following the known protocol (abbreviated as ALHA) [19], and has been characterized [20,21]. The IHSS HA (as SHA, Eliot soil humic acid, code 1S102H) and FA (as SFA, Suwanee river fulvic acid, code 1S101F), which have also been well characterized as standards for environmental organic matter [22], were used without further purification.…”

Section: +mentioning

confidence: 99%

Determination of Apparent Formation Constants of Eu(III) with Humic Substances by Ion Selective Liquid Membrane Electrode

Sasaki¹,

Yoshida²,

Kobayashi³

et al. 2012

AJAC

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This is the novel measurement of the apparent formation constants of trivalent lanthanide with humic substances by potentiometric titration using an ion selective electrode (ISE) consisting of bis(diphenylphosphoryl)methane as an ionophore. The ISE prepared exhibited a Nernstian response to the Eu 3+ concentration in the test solutions in the presence of humic acid and fulvic acid. The effect of the solution conditions, including the pH, initial metal and humic substance concentrations, and ionic strength, on the formation constants was examined. The present formation constants were compared with the reported data using solvent extraction method.

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Influence of europium(III) on the adsorption of humic acid onto mica studied by AFM

Plaschke

Römer

Klenze

et al. 2000

Surf. Interface Anal.

Self Cite

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The importance of humic colloids influencing mobilization or immobilization of metal ions, i.e. actinides, in natural aquatic systems has been emphasized in the context of safety aspects of nuclear waste repositories. The influence of polyvalent cations, i.e. Eu(III) as a homologue for trivalent actinides, on the adsorption of humic acid (HA) onto the basal plane of cleaved muscovite is studied by atomic force microscopy (AFM). To avoid denaturation of sorbed HA by drying procedures, the investigation is performed in aqueous medium by applying non-contact-mode AFM (also called fluid-tapping-mode AFM). Nanostructure, surface coverage and dimensions of sorbed HA are found to be influenced by Eu(III) ions. To get a basic understanding of the interaction between HA and the mica crystalline plane, force spectroscopy experiments are performed. Force versus distance curves are recorded with and without the presence of Eu(III) ions using AFM tips covered with HA. It is found that in the presence of Eu(III) binding forces between HA and the mica surface increase by about one order of magnitude. This effect is partly reversible in deionized water and fully reversible in EDTA solution. On the basis of these observations, polyvalent cation bridges can be favoured as the binding mechanism between HA and mica planes.

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Characterization of humic and fulvic acids from Gorleben groundwater

Cited by 201 publications

References 6 publications

Systematic change in relative stabilities of REE-humic complexes at various metal loading levels

Systematic change in relative stabilities of REE-humic complexes at various metal loading levels

Determination of Apparent Formation Constants of Eu(III) with Humic Substances by Ion Selective Liquid Membrane Electrode

Influence of europium(III) on the adsorption of humic acid onto mica studied by AFM

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