Investigation of the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution
Background: The aim of this study was to investigate the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution. Methods: In this study, chitosan-tragacanth nanocomposites were synthesized and analyzed by electron microscopy (SEM), (TEM) and Fourier transform...
| मुख्य लेखकों: | , |
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| स्वरूप: | लेख |
| भाषा: | fas |
| प्रकाशित: |
Alborz University of Medical Sciences
2016-03-01
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| श्रृंखला: | Muhandisī-i Bihdāsht-i Muḥīṭ |
| विषय: | |
| ऑनलाइन पहुंच: | http://jehe.abzums.ac.ir/browse.php?a_code=A-10-25-9&slc_lang=en&sid=1 |
| _version_ | 1828835932896231424 |
|---|---|
| author | Adel Almasi Nahnaji Leila Mahdavian |
| author_facet | Adel Almasi Nahnaji Leila Mahdavian |
| author_sort | Adel Almasi Nahnaji |
| collection | DOAJ |
| description | Background: The aim of this study was to investigate the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution.
Methods: In this study, chitosan-tragacanth nanocomposites were synthesized and analyzed by electron microscopy (SEM), (TEM) and Fourier transform spectroscopy (FT-IR) for the size and shape of the surface. The nano-composite of chitosan-tragacanth, for the adsorption of chromium (VI) in aqueous solution was used as adsorbent.
Results: The optimum conditions with multiple experiments to enhance the absorption were evaluated. The highest absorption of Cr (VI) was occurred in the adsorbent dosage of 0.2 g, 8 ppm concentration of chromium ions, the pH=6 and also retention time of 50 min; in 298 ˚K temperature. After determining optimal conditions of adsorption, isotherms equations and study and thermodynamic parameters were applied. Adsorption process of chromium (VI) on nano-composite chitosan - Tragacanth was conformed with Temkin isotherm.
Conclusion: The thermodynamic parameters such as standard Gibbs free energy changes, changes in enthalpy and entropy changes in the standard showed that the adsorption process of Cr (VI) is spontaneous and heating, and kinetics studies of models Lagergren, Ho , Alovich and intraparticle is used, the results show that the adsorption kinetics follows the pseudo-second order. |
| first_indexed | 2024-12-12T18:12:24Z |
| format | Article |
| id | doaj.art-457b0373162c44b2908c14b51d61c196 |
| institution | Directory Open Access Journal |
| issn | 2383-3211 |
| language | fas |
| last_indexed | 2024-12-12T18:12:24Z |
| publishDate | 2016-03-01 |
| publisher | Alborz University of Medical Sciences |
| record_format | Article |
| series | Muhandisī-i Bihdāsht-i Muḥīṭ |
| spelling | doaj.art-457b0373162c44b2908c14b51d61c1962022-12-22T00:16:21ZfasAlborz University of Medical SciencesMuhandisī-i Bihdāsht-i Muḥīṭ2383-32112016-03-0132129142Investigation of the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solutionAdel Almasi Nahnaji0Leila Mahdavian1 Background: The aim of this study was to investigate the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution. Methods: In this study, chitosan-tragacanth nanocomposites were synthesized and analyzed by electron microscopy (SEM), (TEM) and Fourier transform spectroscopy (FT-IR) for the size and shape of the surface. The nano-composite of chitosan-tragacanth, for the adsorption of chromium (VI) in aqueous solution was used as adsorbent. Results: The optimum conditions with multiple experiments to enhance the absorption were evaluated. The highest absorption of Cr (VI) was occurred in the adsorbent dosage of 0.2 g, 8 ppm concentration of chromium ions, the pH=6 and also retention time of 50 min; in 298 ˚K temperature. After determining optimal conditions of adsorption, isotherms equations and study and thermodynamic parameters were applied. Adsorption process of chromium (VI) on nano-composite chitosan - Tragacanth was conformed with Temkin isotherm. Conclusion: The thermodynamic parameters such as standard Gibbs free energy changes, changes in enthalpy and entropy changes in the standard showed that the adsorption process of Cr (VI) is spontaneous and heating, and kinetics studies of models Lagergren, Ho , Alovich and intraparticle is used, the results show that the adsorption kinetics follows the pseudo-second order.http://jehe.abzums.ac.ir/browse.php?a_code=A-10-25-9&slc_lang=en&sid=1Nano-composite chitosan – Tragacanth Chromium ion (VI) Surface adsorption Alovich model Intraparticle model |
| spellingShingle | Adel Almasi Nahnaji Leila Mahdavian Investigation of the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution Muhandisī-i Bihdāsht-i Muḥīṭ Nano-composite chitosan – Tragacanth Chromium ion (VI) Surface adsorption Alovich model Intraparticle model |
| title | Investigation of the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution |
| title_full | Investigation of the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution |
| title_fullStr | Investigation of the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution |
| title_full_unstemmed | Investigation of the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution |
| title_short | Investigation of the removal of chromium (VI) by Nanocomposites Chitosan-tragacanth solution from aqueous solution |
| title_sort | investigation of the removal of chromium vi by nanocomposites chitosan tragacanth solution from aqueous solution |
| topic | Nano-composite chitosan – Tragacanth Chromium ion (VI) Surface adsorption Alovich model Intraparticle model |
| url | http://jehe.abzums.ac.ir/browse.php?a_code=A-10-25-9&slc_lang=en&sid=1 |
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