Removal of Methyl Orange Dye from Aqueous Solutions using NiFe2O4 Nanoparticles: Equilibrium and Kinetic Studies
Background and Objective: Dyes are important pollutants that lead to producing serious hazards to human, other animals and organisms. Dyes are not biodegradable by aerobic treatment processes. Therefore, their removal from industrial effluents before discharging into the environment requires extreme...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | fas |
| Published: |
Tehran University of Medical Sciences
2016-09-01
|
| Series: | سلامت و محیط |
| Subjects: | |
| Online Access: | http://ijhe.tums.ac.ir/browse.php?a_code=A-10-800-1&slc_lang=en&sid=1 |
| _version_ | 1818657598612701184 |
|---|---|
| author | S Sobhanardakani R Zandipak |
| author_facet | S Sobhanardakani R Zandipak |
| author_sort | S Sobhanardakani |
| collection | DOAJ |
| description | Background and Objective: Dyes are important pollutants that lead to producing serious hazards to human, other animals and organisms. Dyes are not biodegradable by aerobic treatment processes. Therefore, their removal from industrial effluents before discharging into the environment requires extreme and great attention. The aim of this research was to evaluate removal efficacy of methyl orange dye from aqueous solutions using NiFe2O4 nanoparticles.
Materials and Methods: This study was an empirical investigation in which NiFe2O4 nanoparticles were synthesized by co-precipitation method and were used as an adsorbent for the removal of methyl orange from aqueous solution. NiFe2O4 nanoparticles were characterized using X-Ray Diffraction (XRD), Transmission Electronic Microscopy (TEM), pHpzc and SEM-EDX elemental analysis methods. Experiments were conducted discontinuously using 20 mL methyl orange solution of 40 mg/L. The effect of variables such as pH (2-8), amount of adsorbent (0.009-0.07 g) and contact time (2-70 min) on the efficacy of dye removal was studied. Finally, experimental data were compared by Langmuir, Freundlich, and Temkin isotherms and pseudo-first-order and pseudo-second-order kinetic models.
Results: TEM images showed that the NiFe2O4 nanoparticles had spherical shapes with the size of 12 nm. The results indicated that removal efficiency increased up to 0.04 g adsorbent and 20 min contact time. The optimum pH for methyl range removal was 2. Moreover, under these conditions, the adsorption process followed the Langmuir adsorption isotherm with a correlation coefficient of 0.995 and pseudo-second-order kinetic model with a correlation coefficient of 0.999. Also, the maximum adsorption capacity of the prepared adsorbent was 135 (mg/g) for Langmuir isotherm.
Conclusion: The NiFe2O4 nanoparticles are effective and available adsorbents for the removal of methyl orange from industrial wastewater. |
| first_indexed | 2024-12-17T03:44:02Z |
| format | Article |
| id | doaj.art-37b292edbcc24e4ea602982b6b62bec3 |
| institution | Directory Open Access Journal |
| issn | 2008-2029 2008-3718 |
| language | fas |
| last_indexed | 2024-12-17T03:44:02Z |
| publishDate | 2016-09-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | سلامت و محیط |
| spelling | doaj.art-37b292edbcc24e4ea602982b6b62bec32022-12-21T22:04:56ZfasTehran University of Medical Sciencesسلامت و محیط2008-20292008-37182016-09-0192247258Removal of Methyl Orange Dye from Aqueous Solutions using NiFe2O4 Nanoparticles: Equilibrium and Kinetic StudiesS Sobhanardakani0R Zandipak1 Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran Young Researchers and Elite Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran Background and Objective: Dyes are important pollutants that lead to producing serious hazards to human, other animals and organisms. Dyes are not biodegradable by aerobic treatment processes. Therefore, their removal from industrial effluents before discharging into the environment requires extreme and great attention. The aim of this research was to evaluate removal efficacy of methyl orange dye from aqueous solutions using NiFe2O4 nanoparticles. Materials and Methods: This study was an empirical investigation in which NiFe2O4 nanoparticles were synthesized by co-precipitation method and were used as an adsorbent for the removal of methyl orange from aqueous solution. NiFe2O4 nanoparticles were characterized using X-Ray Diffraction (XRD), Transmission Electronic Microscopy (TEM), pHpzc and SEM-EDX elemental analysis methods. Experiments were conducted discontinuously using 20 mL methyl orange solution of 40 mg/L. The effect of variables such as pH (2-8), amount of adsorbent (0.009-0.07 g) and contact time (2-70 min) on the efficacy of dye removal was studied. Finally, experimental data were compared by Langmuir, Freundlich, and Temkin isotherms and pseudo-first-order and pseudo-second-order kinetic models. Results: TEM images showed that the NiFe2O4 nanoparticles had spherical shapes with the size of 12 nm. The results indicated that removal efficiency increased up to 0.04 g adsorbent and 20 min contact time. The optimum pH for methyl range removal was 2. Moreover, under these conditions, the adsorption process followed the Langmuir adsorption isotherm with a correlation coefficient of 0.995 and pseudo-second-order kinetic model with a correlation coefficient of 0.999. Also, the maximum adsorption capacity of the prepared adsorbent was 135 (mg/g) for Langmuir isotherm. Conclusion: The NiFe2O4 nanoparticles are effective and available adsorbents for the removal of methyl orange from industrial wastewater.http://ijhe.tums.ac.ir/browse.php?a_code=A-10-800-1&slc_lang=en&sid=1NiFe2O4 Nanoparticles Methyl orange Adsorption Isotherm |
| spellingShingle | S Sobhanardakani R Zandipak Removal of Methyl Orange Dye from Aqueous Solutions using NiFe2O4 Nanoparticles: Equilibrium and Kinetic Studies سلامت و محیط NiFe2O4 Nanoparticles Methyl orange Adsorption Isotherm |
| title | Removal of Methyl Orange Dye from Aqueous Solutions using NiFe2O4 Nanoparticles: Equilibrium and Kinetic Studies |
| title_full | Removal of Methyl Orange Dye from Aqueous Solutions using NiFe2O4 Nanoparticles: Equilibrium and Kinetic Studies |
| title_fullStr | Removal of Methyl Orange Dye from Aqueous Solutions using NiFe2O4 Nanoparticles: Equilibrium and Kinetic Studies |
| title_full_unstemmed | Removal of Methyl Orange Dye from Aqueous Solutions using NiFe2O4 Nanoparticles: Equilibrium and Kinetic Studies |
| title_short | Removal of Methyl Orange Dye from Aqueous Solutions using NiFe2O4 Nanoparticles: Equilibrium and Kinetic Studies |
| title_sort | removal of methyl orange dye from aqueous solutions using nife2o4 nanoparticles equilibrium and kinetic studies |
| topic | NiFe2O4 Nanoparticles Methyl orange Adsorption Isotherm |
| url | http://ijhe.tums.ac.ir/browse.php?a_code=A-10-800-1&slc_lang=en&sid=1 |
| work_keys_str_mv | AT ssobhanardakani removalofmethylorangedyefromaqueoussolutionsusingnife2o4nanoparticlesequilibriumandkineticstudies AT rzandipak removalofmethylorangedyefromaqueoussolutionsusingnife2o4nanoparticlesequilibriumandkineticstudies |