Distribution of oxygen-containing functional groups and elements in humic acids from marine sediments

1980 ◽  
Vol 36 (1) ◽  
pp. 59-67 ◽  
Author(s):  
Yoshiji Saito ◽  
Shigeo Hayano
Keyword(s):  
Functional Groups ◽  
Humic Acids ◽  
Marine Sediments

Functional and Elemental Composition of Humic Acids of Sapropels of the River Ob’s Left Bank of Khmao-Yugra

2019 ◽  
Vol 16 (11) ◽  
pp. 4601-4604
Author(s):  
M. Osnitsky Evgeny ◽  
A. Gurova Olga ◽  
V. Boroduy Davyd ◽  
V. Litvinenko Natalia ◽  
V. Grekhova Iraida
Keyword(s):  
Elemental Composition ◽  
Functional Groups ◽  
Humic Acids ◽  
Chemical Elements ◽  
Left Bank ◽  
Degree Of Aromaticity ◽  
Maximum Proportion ◽  
The Relationship ◽  
Khanty Mansi Autonomous ◽  
Qualitative And Quantitative Characteristics

This article describes qualitative and quantitative characteristics of chemical elements and acidbase functional groups of humic acids (HA) in five lakes of the left bank of the Ob of Khanty-Mansi Autonomous Okrug-Yugra. The data on their elemental composition (CNHO), atomic ratios (H/C, O/C) carboxyl (COOH) and phenolic (OH) functional groups have been presented. The relationship between the elemental and functional composition of HA has been traced. It is found that with increasing hydrogen content, the percentage of carboxyl groups in the macromolecule of HA increases, the proportion of aromatic moieties reduces, and with increasing oxygen content the number of phenolic hydroxyls increases. According to the chart of atomic ratios describing the content of aromatic and aliphatic parts, HA are placed in the sequence, characterizing the maximum proportion of aromatic structures. Clearly there is a group of HA of lake Shchuchye sapropel, which is characterized by a maximum degree of aromaticity, followed by in decreasing order according to the contents of the Carom humic acids of sapropels of lakes Srednesatyginskiy Tuman, Nyartur, Medvezhye and Satyginskiy Tuman. The highest content of the Carom is typical for the more formed, “mature” HA.

Aggregate formation of humic acids from marine sediments

1991 ◽  
Vol 33 (3) ◽  
pp. 229-241 ◽  
Author(s):  
Noriko Shinozuka ◽  
Chang Lee
Keyword(s):  
Humic Acids ◽  
Marine Sediments ◽  
Aggregate Formation

scholarly journals Agarose Hydrogels Enriched by Humic Acids as the Complexation Agent

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 687 ◽  
Author(s):  
Martina Klučáková
Keyword(s):  
Methylene Blue ◽  
Humic Substances ◽  
Functional Groups ◽  
Humic Acids ◽  
Diffusion Coefficients ◽  
Rhodamine 6G ◽  
Effective Diffusion ◽  
High Affinity ◽  
Effective Diffusion Coefficients ◽  
Complexation Agent

The transport properties of agarose hydrogels enriched by humic acids were studied. Methylene blue, rhodamine 6G and Cu(II) ions were incorporated into hydrogel as diffusion probes, and then their release into water was monitored. Cu(II) ions as well as both the dyes studied in this work have high affinity to humic substances and their interactions strongly affected their diffusion in hydrogels. It was confirmed that humic acids retarded the transport of diffusion probes. Humic acids’ enrichment caused the decrease in the values of effective diffusion coefficients due to their complexation with diffusion probes. In general, the diffusion of dyes was more affected by the complexation with humic acids in comparison with Cu(II) ions. The effect of complexation was selective for the particular diffusion probe. The strongest effect was obtained for the diffusion of methylene blue. It was assumed that metal ions interacted preferentially with acidic functional groups. In contrast to Cu(II) ions, dyes can interact with acidic functional groups, and the condensed cyclic structures of the dye probes supported their interactions with the hydrophobic domains of humic substances.

Comparison of binding abilities of fulvic and humic acids extracted from recent marine sediments with UO22+

1986 ◽  
Vol 9 (6) ◽  
pp. 285-292 ◽  
Author(s):  
C. Munier-Lamy ◽  
Ph. Adrian ◽  
J. Berthelin ◽  
J. Rouiller
Keyword(s):  
Humic Acids ◽  
Marine Sediments

scholarly journals Humic Acid-Oxidizing, Nitrate-Reducing Bacteria in Agricultural Soils

mBio ◽  
2011 ◽  
Vol 2 (4) ◽  
Author(s):  
J. Ian Van Trump ◽  
Kelly C. Wrighton ◽  
J. Cameron Thrash ◽  
Karrie A. Weber ◽  
Gary L. Andersen ◽  
...  
Keyword(s):  
Humic Acid ◽  
Bacterial Community ◽  
Functional Groups ◽  
Humic Acids ◽  
Nitrate Reduction ◽  
Agricultural Soils ◽  
Soil Microbial Communities ◽  
No Donor ◽  
Probable Number ◽  
Soil Systems

ABSTRACTThis study demonstrates the prevalence, phylogenetic diversity, and physiology of nitrate-reducing microorganisms capable of utilizing reduced humic acids (HA) as electron donors in agricultural soils. Most probable number (MPN) enumeration of agricultural soils revealed large populations (104to 106 cells g−1soil) of microorganisms capable of reducing nitrate while oxidizing the reduced HA analog 2,6-anthrahydroquinone disulfonate (AH2DS) to its corresponding quinone. Nitrate-dependent HA-oxidizing organisms isolated from agricultural soils were phylogenetically diverse and included members of theAlphaproteobacteria,Betaproteobacteria, andGammaproteobacteria. Advective up-flow columns inoculated with corn plot soil and amended with reduced HA and nitrate supported both HA oxidation and enhanced nitrate reduction relative to no-donor or oxidized HA controls. The additional electron donating capacity of reduced HA could reasonably be attributed to the oxidation of reduced functional groups. Subsequent 16S rRNA gene-based high-density oligonucleotide microarray (PhyloChip) indicated that reduced HA columns supported the development of a bacterial community enriched with members of theAcidobacteria,Firmicutes, andBetaproteobacteriarelative to the no-donor control and initial inoculum. This study identifies a previously unrecognized role for HA in stimulating denitrification processes in saturated soil systems. Furthermore, this study indicates that reduced humic acids impact soil geochemistry and the indigenous bacterial community composition.IMPORTANCEThis study identifies a new metabolic capacity in soil microbial communities that may be responsible for the mediation of significant nitrogen losses from soil systems. Nitrate-dependent humic acid (HA)-oxidizing organisms isolated from agricultural soils were phylogenetically diverse and included members ofAlphaproteobacteria,Betaproteobacteria, andGammaproteobacteria. Advective up-flow columns inoculated with corn plot soil and amended with reduced HA and nitrate supported both HA oxidation and enhanced nitrate reduction relative to no-donor or oxidized HA controls. The additional electron donating capacity of reduced HA could reasonably be attributed to the oxidation of reduced functional groups.

Fractional determination of functional groups of humic acids by conductometric titration

Geoderma ◽  
1977 ◽  
Vol 19 (4) ◽  
pp. 307-317 ◽  
Author(s):  
Shigemitsu Arai ◽  
Kyoichi Kumada
Keyword(s):  
Functional Groups ◽  
Humic Acids ◽  
Conductometric Titration
Sign in / Sign up

Export Citation Format

Share Document