Preparation and characterization of humic acid–carbon hybrid materials as adsorbents for organic micro-pollutants

2015 ◽  
Vol 22 (16) ◽  
pp. 12035-12049 ◽  
Author(s):  
Emad K. Radwan ◽  
Hany H. Abdel Ghafar ◽  
Ahmed S. Moursy ◽  
Cooper H. Langford ◽  
Ahmed H. Bedair ◽  
...  
Keyword(s):  
Humic Acid ◽  
Hybrid Materials ◽  
Humic Acid Carbon ◽  
Micro Pollutants

Adsorptive removal of hazardous organic water pollutants by humic acid-carbon hybrid materials: kinetics and isotherm study

2017 ◽  
Vol 80 ◽  
pp. 297-305 ◽  
Author(s):  
Emad K. Radwan ◽  
Hany H. Abdel Ghafar ◽  
Ahmed S. Moursy ◽  
Cooper H. Langford ◽  
Ahmed H. Bedair ◽  
...  
Keyword(s):  
Humic Acid ◽  
Hybrid Materials ◽  
Water Pollutants ◽  
Adsorptive Removal ◽  
Isotherm Study ◽  
Humic Acid Carbon

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.

Hydrogel-clay Nanocomposites as Carriers for Controlled Release

2020 ◽  
Vol 27 (6) ◽  
pp. 919-954 ◽  
Author(s):  
Raluca Ianchis ◽  
Claudia Mihaela Ninciuleanu ◽  
Ioana Catalina Gifu ◽  
Elvira Alexandrescu ◽  
Cristina Lavinia Nistor ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Controlled Release ◽  
Hybrid Materials ◽  
Pharmaceutical Formulations ◽  
Tree Of Life ◽  
Present Review ◽  
Clay Nanocomposites ◽  
Delivery Platform ◽  
Complex Hybrid

The present review aims to summarize the research efforts undertaken in the last few years in the development and testing of hydrogel-clay nanocomposites proposed as carriers for controlled release of diverse drugs. Their advantages, disadvantages and different compositions of polymers/biopolymers with diverse types of clays, as well as their interactions are discussed. Illustrative examples of studies regarding hydrogel-clay nanocomposites are detailed in order to underline the progressive researches on hydrogel-clay-drug pharmaceutical formulations able to respond to a series of demands for the most diverse applications. Brief descriptions of the different techniques used for the characterization of the obtained complex hybrid materials such as: swelling, TGA, DSC, FTIR, XRD, mechanical, SEM, TEM and biology tests, are also included. Enlightened by the presented data, we can suppose that hydrogel-clay nanocomposites will still be a challenging subject of global assiduous researches. We can dare to dream to an efficient drug delivery platform for the treatment of multiple affection concomitantly, these being undoubtedly like ”a tree of life” bearing different kinds of fruits and leaves proper for human healing.

Tanning process promotes abiotic humification: separation and characterization of humic acid-like polymers complex

2020 ◽  
Vol 27 (33) ◽  
pp. 41437-41445
Author(s):  
Chao Zhu ◽  
Huiqin Wang ◽  
Hongrui Ma ◽  
Yonglin Yang ◽  
Fan Li
Keyword(s):  
Humic Acid ◽  
Tanning Process

Synthesis and chromatographic characterization of [Tc-99m]technetium-humic acid species

2000 ◽  
Vol 88 (2) ◽  
Author(s):  
D. Rößler ◽  
K. Franke ◽  
R. Süß ◽  
E. Becker ◽  
H. Kupsch
Keyword(s):  
Humic Acid ◽  
Stannous Chloride ◽  
Gel Permeation Chromatography ◽  
Paper Electrophoresis ◽  
Gel Permeation ◽  
Soil Humic Acid ◽  
Chromatographic Characterization ◽  
Ph Dependent ◽  
Layer Chromatography

A natural moor soil humic acid (HA) was labeled with Tc-99m via reduction of pertechnetate with stannous chloride. The humic acid species obtained were characterized by thin layer chromatography (TLC), gel permeation chromatography (GPC), sequential chromatographic analysis (SCA), paper electrophoresis and micropore filtration. Labeling was found to take place in all ranges of molecular weight. Due to the complex humic acid composition and the formation of hydroxo species the labeling yields strongly depend on the separation conditions, ranging from 42% to 80%. The pH-dependent distribution of mobile and immobile species was determined by SCA for HTcO

scholarly journals Characterization of Hybrid Materials by Means of Inverse Gas Chromatography and Chemometrics

2013 ◽  
Vol 102 (5) ◽  
pp. 1524-1531 ◽  
Author(s):  
Joanna Kołodziejek ◽  
Adam Voelkel ◽  
Karoly Heberger
Keyword(s):  
Gas Chromatography ◽  
Hybrid Materials ◽  
Inverse Gas Chromatography

scholarly journals Molecular characterization of an end-residue of humeomics applied to a soil humic acid

RSC Advances ◽  
2014 ◽  
Vol 4 (45) ◽  
pp. 23658-23665 ◽  
Author(s):  
A. Nebbioso ◽  
A. Piccolo ◽  
M. Lamshöft ◽  
M. Spiteller
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Molecular Characterization ◽  
Natural Organic Matter ◽  
Molecular Composition ◽  
Chemical Fractionation ◽  
Soil Humic Acid

Humeomics encompasses step-wise chemical fractionation and instrumental determination to fully characterize the heterogeneous molecular composition of natural organic matter.

Humic acid removal by electrocoagulation: characterization of aluminum species and humic acid

2015 ◽  
Vol 57 (24) ◽  
pp. 10969-10979 ◽  
Author(s):  
Ronna Jane S. Palacios ◽  
Do-Gun Kim ◽  
Seok-Oh Ko
Keyword(s):  
Humic Acid
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