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Adsorption of Humic Substances on Goethite: Comparison between Humic Acids and Fulvic Acids
Environmental Science & Technology, 2006The adsorption of humic acids (HA) to goethite (at pH 3-11) and the proton co-adsorption (at pH 4.0, 5.5, and 7.0) were measured, and the results were compared to those of fulvic acids (FA). Compared to FA, the adsorption of HA is stronger and more ionic strength dependent. The adsorption of both HA and FA decreases with increasing pH.
Weng, L.P. +3 more
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Effect of humic acid source on humic acid adsorption onto titanium dioxide nanoparticles
Science of The Total Environment, 2014In many studies, different humic acid (HA) sources are used interchangeably to evaluate the effect of organic matter on geochemical processes in the environment. This research looks more specifically at the effect of HA source on HA adsorption onto nano-TiO2 and how HA adsorption affects the fate and transport of nano-TiO2.
Mohamed, Erhayem, Mary, Sohn
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Chemiluminescence of Humic Acids
Nature, 1967THE concept that humic acids (HA) are heteropolycondensates of phenolic substances is now widely accepted1,2. All the humic acids have hydroxyl, methoxy, or carbonyl groups connected with the aromatic parts of the nucleus. Our earlier investigations suggested that oxidation of hydroxyl groups attached to the aromatic ring may be accompanied by ...
DANUTA SŁAWIŃSKA, JANUSZ SŁAWIŃSKI
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UNISWA Research Journal of Agriculture, Science and Technology, 2007
No Abstract. Uniswa Research Journal of Agriculture, Science and Technology Vol. 9 (1) 2006: pp.
Thwala, J, Inam, E, Hall, A, Warwick, P
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No Abstract. Uniswa Research Journal of Agriculture, Science and Technology Vol. 9 (1) 2006: pp.
Thwala, J, Inam, E, Hall, A, Warwick, P
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Humic acid reactions with amino acids
Soil Biology and Biochemistry, 1974Abstract Reactions between five humic acids extracted from soils with widely differing pedological histories and 17 amino acids commonly occurring in proteins were investigated in aqueous solutions at pH 3.0 and 6.5. The reactions were affected by: (a) nature of the humic acid: (b) pH of the system: and (c) length of contact.
M. Schnitzer, F.J. Sowden, K.C. Ivarson
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Solid Fuel Chemistry, 2015
A method for the chemical modification of humic acids with benzoyl chloride under the conditions of phase-transfer catalysis was developed. It was demonstrated by potentiometric titration that the reaction of humic acids with benzoyl chloride can occur at both hydroxyl (–OH) and carboxyl (–COOH) groups.
S. L. Khil’ko +5 more
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A method for the chemical modification of humic acids with benzoyl chloride under the conditions of phase-transfer catalysis was developed. It was demonstrated by potentiometric titration that the reaction of humic acids with benzoyl chloride can occur at both hydroxyl (–OH) and carboxyl (–COOH) groups.
S. L. Khil’ko +5 more
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Natural Humic‐Acid‐Based Phototheranostic Agent
Advanced Healthcare Materials, 2018AbstractHumic acids, a major constituent of natural organic carbon resources, are naturally formed through the microbial biodegradation of animal and plant residues. Due to numerous physiologically active groups (phenol, carboxyl, and quinone), the biomedical applications of humic acid have been already investigated across different cultures for ...
Zhao‐Hua Miao +9 more
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Humic Acid and Fulvic Acid Hinder Long-Term Weathering of Microplastics in Lake Water
Environmental Science & Technology, 2021Mengjie Wang, Shixiang Gao
exaly
The sleeping giant: A polymer View on humic matter in synthesis and applications
Progress in Polymer Science, 2020Fan Yang, Markus Antonietti
exaly