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Kinetics of aluminum-fulvic acid complexation in acidic waters
Environmental Science & Technology, 1987A fluorescence technique has been used to study the complex formation kinetics of aluminum with a single metal-free fulvic acid isolated from an Adirondack Mountain forest soil. In the pH range of 3.0-4.5, two kinetically distinguishable components of the fulvic acid mixture have been identified, which define two types of average aluminum binding sites.
B J, Plankey, H H, Patterson
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Physico-Chemical Properties of Fulvic Acids
2003By mean of extraction and ion exchange fulvic acids with variable vestigial content of metals were separated from bottom sediments. These acids were subject to physico-chemical analysis, which evaluated their electrokinetic potential, size of molecules, absorbance, electrical conductivity of the solution as well as the relation of these factors to the ...
Anna M. Anielak, Majewski, Artur
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The dissolution of micas by fulvic acid
Geoderma, 1976Abstract Three micas commonly occurring in soils, that is, biotite, phlogopite and muscovite, were shaken with 0.2% (W/V) aqueous fulvic acid (FA) solution for 710 h at room temperature. Proportions of major constituent elements extracted (Fe, Al, Mg, K and Si from biotite, Al, Mg, K and Si from phlogopite and Al, K and Si from muscovite) were ...
M Schnitzer, H Kodama
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Fulvic acid in broiler growing
Животноводство России, 2021Эксперимент показал, что при выращивании бройлеров эффективно добавлять в питьевую воду фульвокислоту в дозе 2% (концентрация 1 г/л). Это позволило увеличить убойный выход потрошеной тушки, массовую долю грудки и бедра, выход мышц и съедобных частей.
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Chemical Characteristics of Fulvic Acids
Journal AWWA, 1963In the first article of this series on the nature of organic compounds that cause color in natural waters (BLACK, A. P. & CHRISTMAN, R. F. Characteristics of Colored Surface Waters. Jour. AWWA, 55 :753 [Jun. 1963]), data was presented concerning the physical and chemical properties of colored raw waters. This article discusses experimental evidence
A. P. Black, Russell F. Christman
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Adsorption of fulvic acid on goethite
Geochimica et Cosmochimica Acta, 2000The adsorption of fulvic acid by goethite was determined experimentally as a function of concentration, pH, and ionic strength. The data were described with the CD-MUSIC model of Hiemstra and Van Riemsdijk (1996), which allows the distribution of charge of the bound fulvate molecule over a surface region. Simultaneously, the concentration, pH, and salt
Filius, J.D. +4 more
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Pyrolysis of humic and fulvic acids
Geochimica et Cosmochimica Acta, 1969Abstract Pyrolysis of humic and fulvic acids isolated from a North Carolina soil yields a variety of aromatic, heterocyclic and straight chain organ compounds. The pyrolysis products identified by gas chromatography and mass spectrometry indicate that humic and fulvic acids have aromatic and polysaccharide structures in their molecules.
R.L. Wershaw, G.E. Bohner
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Protonation reactions of fulvic acids
Journal of Soil Science, 1988SUMMARY The protonation reactions of fulvic acids are described in terms of a model involving a mixture of n monoprotic acids HA, HB, HC … pH titration data were analysed by nonlinear least squares methods, using a model having n ...
J. E. GREGOR, H. K. J. POWELL
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Europium binding by fulvic acids
Analytica Chimica Acta, 1998The binding of Eu to fulvic acid (FA) as a function of pH was determined by Schubert's method and by equilibrium dialysis. Data obtained by both methods showed a strong pH dependence, which was reproduced well by the model used to interpret the data (humic ion-binding model VI).
Lead, J. R. +4 more
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Chemosphere, 2016
The behavior of cerium (IV) oxide nanoparticles has been first investigated at different pH conditions. The point of zero charge was determined as well as the stability domains using dynamic light scattering, nanoparticle tracking analysis and scanning electron microscopy.
Oriekhova, Olena, Stoll, Serge
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The behavior of cerium (IV) oxide nanoparticles has been first investigated at different pH conditions. The point of zero charge was determined as well as the stability domains using dynamic light scattering, nanoparticle tracking analysis and scanning electron microscopy.
Oriekhova, Olena, Stoll, Serge
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