Characterization and acid–base properties of fulvic and humic acids isolated from two horizons of an ombrotrophic peat bog

Geoderma ◽  
2005 ◽  
Vol 126 (3-4) ◽  
pp. 367-374 ◽  
Author(s):  
D. Gondar ◽  
R. Lopez ◽  
S. Fiol ◽  
J.M. Antelo ◽  
F. Arce
Keyword(s):  
Humic Acids ◽  
Peat Bog ◽  
Acid Base ◽  
Ombrotrophic Peat ◽  
Base Properties

Copper binding by peat fulvic and humic acids extracted from two horizons of an ombrotrophic peat bog

Chemosphere ◽  
2006 ◽  
Vol 63 (1) ◽  
pp. 82-88 ◽  
Author(s):  
Dora Gondar ◽  
Ana Iglesias ◽  
Rocio López ◽  
Sarah Fiol ◽  
Juan M. Antelo ◽  
...  
Keyword(s):  
Humic Acids ◽  
Peat Bog ◽  
Copper Binding ◽  
Ombrotrophic Peat

Humic acids role in Br accumulation along two ombrotrophic peat bog profiles

Geoderma ◽  
2008 ◽  
Vol 146 (1-2) ◽  
pp. 26-31 ◽  
Author(s):  
C. Zaccone ◽  
C. Cocozza ◽  
W. Shotyk ◽  
T.M. Miano
Keyword(s):  
Humic Acids ◽  
Peat Bog ◽  
Ombrotrophic Peat

Potentiometric studies of the acid–base properties of tropical humic acids

Geoderma ◽  
2014 ◽  
Vol 217-218 ◽  
pp. 18-25 ◽  
Author(s):  
Elvis Baidoo ◽  
James H. Ephraim ◽  
Godfred Darko ◽  
Osei Akoto
Keyword(s):  
Humic Acids ◽  
Potentiometric Studies ◽  
Acid Base ◽  
Base Properties

scholarly journals Structure and physical–chemical properties of humic aсids of oligotrophic peat bog of arkhangelsk region

2014 ◽  
Vol 33 (1) ◽  
pp. 1-8
Author(s):  
Irina Kuznetsova ◽  
Konstantin Bogolitsyn ◽  
Nikolay Larionov ◽  
Tatiana Boytsova ◽  
Irina Palamarchuk ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Sorption Capacity ◽  
Humic Acids ◽  
Chemical Properties ◽  
Peat Bog ◽  
Functional Composition ◽  
Acid Base ◽  
Physical Chemical ◽  
Molecular Weight Characteristics ◽  
The Relationship

AbstractThe article presents data on the elemental and functional composition of humic acids, their molecular weight characteristics, physical, chemical and acid-base properties. The sorption properties of humic acids towards Cd2+ and Pb2+ are studied. The relationship between the polyelectrolyte nature of humic acids and their sorption capacity is revealed.

Acid-base properties of 1,3-diphenyl-5-(1H-tetrazol-2-yl)formazan and 1,3-diphenyl-5-(2H-1,2,4-triazol-3-yl)formazan

1982 ◽  
Vol 47 (11) ◽  
pp. 2882-2889
Author(s):  
Nadezhda Likhareva ◽  
Ladislav Šůcha ◽  
Miloslav Suchánek
Keyword(s):  
Computer Program ◽  
Dissociation Constants ◽  
Acid Base ◽  
New Compounds ◽  
Base Properties

Two new compounds from the formazan series, viz. 1,3-diphenyl-5-(1H-tetrazol-2-yl)formazan and 1,3-diphenyl-5-(2H-1,2,4-triazol-3-yl)formazan, were prepared, and the dissociation constants and molar absorptivities of all of their acid-base species were determined spectrophotometrically employing the SPEKTFOT computer program.

Acid-base properties of metals and glasses of Na2O.P2O5-xB2O3 system

1984 ◽  
Vol 49 (10) ◽  
pp. 2355-2362 ◽  
Author(s):  
Juraj Leško ◽  
Marie Dorušková ◽  
Jan Tržil
Keyword(s):  
Boron Oxide ◽  
A Priori ◽  
Optical Basicity ◽  
Galvanic Cell ◽  
Acid Base ◽  
Tetrahedral Configuration ◽  
Relative Basicity ◽  
Base Theory ◽  
Base Properties

Boron oxide in the Na2O.P2O5-x B2O3 system behaves as a Lux base. Its addition to Na2O.P2O5 brings about transformation of a Co(II) indicator from octahedral to tetrahedral configuration, increase in the optical basicity ΛPb(II), increase in the relative basicity of the melt as determined by means of a galvanic cell, and depolymerization reactions releasing PO43- ions. In the Na2O-B2O3 system free of P2O5, boron oxide behaves as a Lux acid. The amphoretic nature of B2O3 is explained in terms of Lux's acid-base theory extended in analogy with the protolysis theory. The theoretical optical basicity values do not indicate the amphoretic behaviour of B2O3 because in this approach boron oxide is a priori regarded as more acidic than Na2O.P2O5.

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