Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization
Abstract In this study, adsorption of Acid green 20 (AG20) by modified sepiolite, hexadecyltrimethylammonium-modified sepiolite (HDTMA-Sep), was optimized using response surface methodology based on a central composite design. Characteristics of natural sepiolite and modified sepiolite can be analyz...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2018-09-01
|
| Series: | Applied Water Science |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s13201-018-0813-8 |
| _version_ | 1819146397082976256 |
|---|---|
| author | Mohammad Malakootian Hiwa Hossaini Ali Asadipour Mozhgan Daneshkhah |
| author_facet | Mohammad Malakootian Hiwa Hossaini Ali Asadipour Mozhgan Daneshkhah |
| author_sort | Mohammad Malakootian |
| collection | DOAJ |
| description | Abstract In this study, adsorption of Acid green 20 (AG20) by modified sepiolite, hexadecyltrimethylammonium-modified sepiolite (HDTMA-Sep), was optimized using response surface methodology based on a central composite design. Characteristics of natural sepiolite and modified sepiolite can be analyzed by FTIR and XRD techniques. In order to achieve a better comprehension of applicability of adsorbent for removing dyes from colored effluents, isotherm and kinetic studies were also carried out. The maximum dye removal of 78% and 72% for synthetic solutions and real wastewater, respectively, was obtained at the initial dye concentration of 77.1 mg/L, contact time of 24.81 min, solution pH of 6.19 and adsorbent dosage of 1.03 g/L. The kinetic studies revealed that the adsorption process followed pseudo-second-order model. The adsorption data were best fitted to Freundlich model. The result indicated that the contact time and dye concentration have more influence on the removal efficiency rather than pH and amount of adsorbent. The experimental data from this study indicated that the modified sepiolite is an efficient adsorbent for dye removal from aqueous solutions. |
| first_indexed | 2024-12-22T13:13:16Z |
| format | Article |
| id | doaj.art-6d9c057b6d36447d86411df31646c1cd |
| institution | Directory Open Access Journal |
| issn | 2190-5487 2190-5495 |
| language | English |
| last_indexed | 2024-12-22T13:13:16Z |
| publishDate | 2018-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Water Science |
| spelling | doaj.art-6d9c057b6d36447d86411df31646c1cd2022-12-21T18:24:41ZengSpringerOpenApplied Water Science2190-54872190-54952018-09-018611210.1007/s13201-018-0813-8Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimizationMohammad Malakootian0Hiwa Hossaini1Ali Asadipour2Mozhgan Daneshkhah3Environmental Health Engineering Research Center, Kerman University of Medical SciencesDepartment Of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical SciencesDepartment of Medicinal Chemistry, Pharmaceutical Research Center, School of Pharmacy, Kerman University of Medical SciencesEnvironmental Health Engineering, Department of Environmental Health, School of Public Health, Kerman University of Medical SciencesAbstract In this study, adsorption of Acid green 20 (AG20) by modified sepiolite, hexadecyltrimethylammonium-modified sepiolite (HDTMA-Sep), was optimized using response surface methodology based on a central composite design. Characteristics of natural sepiolite and modified sepiolite can be analyzed by FTIR and XRD techniques. In order to achieve a better comprehension of applicability of adsorbent for removing dyes from colored effluents, isotherm and kinetic studies were also carried out. The maximum dye removal of 78% and 72% for synthetic solutions and real wastewater, respectively, was obtained at the initial dye concentration of 77.1 mg/L, contact time of 24.81 min, solution pH of 6.19 and adsorbent dosage of 1.03 g/L. The kinetic studies revealed that the adsorption process followed pseudo-second-order model. The adsorption data were best fitted to Freundlich model. The result indicated that the contact time and dye concentration have more influence on the removal efficiency rather than pH and amount of adsorbent. The experimental data from this study indicated that the modified sepiolite is an efficient adsorbent for dye removal from aqueous solutions.http://link.springer.com/article/10.1007/s13201-018-0813-8AdsorptionSepioliteResponse surface methodologyAcid green 20Central composite design |
| spellingShingle | Mohammad Malakootian Hiwa Hossaini Ali Asadipour Mozhgan Daneshkhah Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization Applied Water Science Adsorption Sepiolite Response surface methodology Acid green 20 Central composite design |
| title | Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization |
| title_full | Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization |
| title_fullStr | Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization |
| title_full_unstemmed | Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization |
| title_short | Preparation and characterization of modified sepiolite for the removal of Acid green 20 from aqueous solutions: isotherm, kinetic and process optimization |
| title_sort | preparation and characterization of modified sepiolite for the removal of acid green 20 from aqueous solutions isotherm kinetic and process optimization |
| topic | Adsorption Sepiolite Response surface methodology Acid green 20 Central composite design |
| url | http://link.springer.com/article/10.1007/s13201-018-0813-8 |
| work_keys_str_mv | AT mohammadmalakootian preparationandcharacterizationofmodifiedsepiolitefortheremovalofacidgreen20fromaqueoussolutionsisothermkineticandprocessoptimization AT hiwahossaini preparationandcharacterizationofmodifiedsepiolitefortheremovalofacidgreen20fromaqueoussolutionsisothermkineticandprocessoptimization AT aliasadipour preparationandcharacterizationofmodifiedsepiolitefortheremovalofacidgreen20fromaqueoussolutionsisothermkineticandprocessoptimization AT mozhgandaneshkhah preparationandcharacterizationofmodifiedsepiolitefortheremovalofacidgreen20fromaqueoussolutionsisothermkineticandprocessoptimization |