scholarly journals Complexes of humic acid with cationic surfactants support the supramolecular view of extracted humic matter

2021 ◽  
Author(s):  
Abdul Amir Chaaban ◽  
Bruno Lartiges ◽  
Eliane El Hayek ◽  
Veronique Kazpard ◽  
Celia Plisson-Chastang ◽  
...  
Keyword(s):  
Humic Acid ◽  
Cationic Surfactants ◽  
Humic Matter

Clay-Humic Substance Composites for Removal of Pharmaceuticals from Water

2020 ◽  
Vol 850 ◽  
pp. 28-34
Author(s):  
Linda Ansone-Bērtiņa ◽  
Marta Jemeļjanova ◽  
Māris Kļaviņš ◽  
Rūta Ozola-Davidāne ◽  
Jorens Kviesis
Keyword(s):  
Composite Materials ◽  
Humic Acid ◽  
Humic Substances ◽  
Clay Mineral ◽  
Low Cost ◽  
Contaminant Removal ◽  
Humic Matter ◽  
Raised Bog ◽  
Acid Type ◽  
Main Component

Humic substances are the main component of soil organic matter and they actively interact with substances in soils, including pollutants. Humic acid-clay mineral composite materials can be considered as prospective and low-cost sorbents for contaminant removal. The aim of this study is to develop clay mineral and humic acid composite materials and to characterise their possible applications. For this research, montmorillonite, kaolinite and bentonite were saturated with three types of humic substances: technical humic acid from lignite, humic substances extracted from raised bog peat (Latvia) and technical K humate from lignite. Obtained sorbents were characterized using FTIR. The sorption was characterised according to the chosen clay mineral and humic acid type and concentration. Comparing the influence of clay minerals and humic substances on humic matter sorption, it has been found that the sorbed amount of humic substances depend on chosen humic substances and/or clay mineral. Obtained sorbents were used for sorption of chlorpromazine. Results indicate that the most perspective sorbents for chlorpromazine removal are bentonite and bentonite modified with humic acid. However, montmorillonite-humic composites also can be used for removal of chlorpromazine from water.

A new economical method to remove humic substances in water: adsorption onto a recycled polymeric material with surfactant addition

2001 ◽  
Vol 43 (11) ◽  
pp. 1-7 ◽  
Author(s):  
A. F. Y. Adou ◽  
V. S. Muhandiki ◽  
Y. Shimizu ◽  
S. Matsui
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Humic Substances ◽  
Cationic Surfactants ◽  
Water Adsorption ◽  
Municipal Wastewater ◽  
Hydrophobic Surface ◽  
Column Experiments ◽  
Economical Method ◽  
Recycled Plastics

Cationic surfactants were used to enhance the adsorption of dissolved organic matter (DOM), contained in the effluent of municipal wastewater, onto polypropylene (PPL), a polymeric synthetic adsorbent made from recycled plastics. Both batch and continuous up-flow column experiments were carried out. The DOM, in the form of humic acid, was treated with a range of cationic surfactants, then, adsorption experiments were conducted to evaluate the adsorption of the mixture onto PPL in both its soluble and precipitated forms. This research validated the feasibility of the proposed system in which anionic humic acid is removed from the aqueous phase by forming neutral hydrophobic molecules with cationic surfactants and subsequently by adsorbing them on the hydrophobic surface of PPL.

Removal of humic acid from water by precipitate flotation using cationic surfactants

2007 ◽  
Vol 20 (9) ◽  
pp. 945-949 ◽  
Author(s):  
Mariana Coutinho Brum ◽  
José Farias Oliveira
Keyword(s):  
Humic Acid ◽  
Cationic Surfactants

Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
Author(s):  
M. Takács ◽  
Gy. Füleky
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Extraction Methods ◽  
Soil Samples ◽  
Hot Water ◽  
Soil Extracts ◽  
Water Percolation ◽  
Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

Changes in the Humic Acid–Metal Complexation Characteristics Depending on Humification Degree / Humīnskābju – Metālu Kompleksveidošanās Rakstura Izmaiņas Atkarībā No Humifikācijas Pakāpes

2012 ◽  
Vol 51 (3) ◽  
pp. 228-237
Author(s):  
D. Dudare ◽  
M. Klavins
Keyword(s):  
Humic Acid ◽  
Stability Constants ◽  
Humic Acids ◽  
Complex Stability ◽  
Peat Layer ◽  
Raised Bog ◽  
Complexing Capacity ◽  
Humification Degree ◽  
Complexation Process ◽  
Complex Stability Constants

The aim of this study is to determine the Cu(II) complexing capacity and stability constants of Cu(II) complexes of humic acids isolated from two well-characterized raised bog peat profiles in respect to the basic properties and humification characteristics of the studied peats and their humic acids. The complex stability constants significantly change within the studied bog profiles and are well correlated with the age and decomposition degree of the peat layer from which the humic acids have been isolated. Among factors that influence this complexation process, molecular mass and ability to form micellar structures (supramolecules) of humic substances are of key importance.

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