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Nature-like solution for removal of direct brown 1 azo dye from aqueous phase using humics-modified silica gel
- Source :
- Chemosphere. 145:83-88
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The objective was to estimate suitability of humics-modified silica gels for adsorptive removal of the Direct Brown 1 trisazo dye from aqueous phase. The major advantage of the proposed adsorbents is that of an ecologically sound procedure of immobilizing silanized humic derivatives onto silica gel in aquatic solutions. The silanized humic derivatives, in turn, are obtained without a use of organic solvent by reacting natural humic materials from peat and coal with 3-aminopropyltriethoxyorganosilane in water. These silanized derivatives are surface active and are capable of self assembling into humic adlayers at the water solid interface. A use of this approach allows for immobilization of up to 220 mg of humic materials per 1 g of SiO2. The adsorption capacity of humics-modified silica gels with respect to the Direct Brown 1 trisazo dye varied from 3.5 up to 8.8 mg per 1 g of SiO2. The maximum sorption obtained for the silanized derivative with 50% modification degree was comparable to adsorption capacity of activated coal to this dye (7.5 mg g(-1)). The results of this adsorption study, warrant further studies of azo dye removal from aqueous environments.
- Subjects :
- Environmental Engineering
Health, Toxicology and Mutagenesis
Inorganic chemistry
Silica Gel
Portable water purification
02 engineering and technology
010501 environmental sciences
complex mixtures
01 natural sciences
Water Purification
chemistry.chemical_compound
Adsorption
Environmental Chemistry
Coal
Coloring Agents
Humic Substances
0105 earth and related environmental sciences
Silanes
Aqueous solution
Propylamines
Chemistry
Silica gel
business.industry
Public Health, Environmental and Occupational Health
Aqueous two-phase system
Sorption
General Medicine
General Chemistry
021001 nanoscience & nanotechnology
Pollution
Solutions
Chemical engineering
0210 nano-technology
business
Azo Compounds
Water Pollutants, Chemical
Subjects
Details
- ISSN :
- 00456535
- Volume :
- 145
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi.dedup.....fd33a6ee129b435a0d3dd2c7c2b25cc5