The Impact of Chemical and Thermal Refining on Adsorption Capacity of Iranian Natural Diatomite
Introduction: One of the factors that affects the rate of adsorption and removal of pollutants is the level of bed surface. Today, the use of active carbon substrates, synthetic zeolite such as Y and ZSM-5, are of great efficiency due to their high surface. In this research, diatomite modification w...
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| Format: | Article |
| Language: | fas |
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Hamadan University of Medical Sciences
2018-05-01
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| Series: | Muhandisī-i bihdāsht-i ḥirfah/ī |
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| Online Access: | http://johe.umsha.ac.ir/article-1-323-en.pdf |
| _version_ | 1818965253871894528 |
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| author | Hosein Shojaee Farah Abady Hasan Assilian Mahabady Ali Khavanin Mahdi Abbaszadeh |
| author_facet | Hosein Shojaee Farah Abady Hasan Assilian Mahabady Ali Khavanin Mahdi Abbaszadeh |
| author_sort | Hosein Shojaee Farah Abady |
| collection | DOAJ |
| description | Introduction: One of the factors that affects the rate of adsorption and removal of pollutants is the level of bed surface. Today, the use of active carbon substrates, synthetic zeolite such as Y and ZSM-5, are of great efficiency due to their high surface. In this research, diatomite modification was carried out using chemical and thermal processes to increase the bed surface and also the amount of adsorption capacity.
Methods: After washing with distilled water the crude sample of diatomite was purified with 1 M solution of hydrochloric acid in two stages of 6 hours under the temperature of 70 degrees and finally it was calcinated at the temperature of 750 degrees for 4 hours. Eventually, its characteristics’ such as Specific surface area, the pure distribution, sorption – desorption isotherms and its adsorption capacity was studied.
Results: Acid refinication increases the specific surface area 2.2 times compared to an example of which only washed with deionized water. Furthermore, the rate of SiO2 reached 88 %. By calcinating the sample, the specific surface decreased 16.4 % and crystalline structure Increased. The results of XRF and XRD indicated that most of diatomite combination was respectively cristobalite, quartz and feldspar. And also the amount of adsorption capacity at Break point and saturation after modification was respectively 131% and 97% increased.
Conclusion: results indicated that with the modification of diatomite, and its calcinating at the temperature of 750 degrees, surface area and adsorption capacity increased, but did not increase significantly compared to the existing substrates such as active carbon and synthetic zeolite types and its Requires to more study. |
| first_indexed | 2024-12-20T13:14:05Z |
| format | Article |
| id | doaj.art-c7b0cb6b09d742409974690c9af92dac |
| institution | Directory Open Access Journal |
| issn | 2383-3378 2383-3378 |
| language | fas |
| last_indexed | 2024-12-20T13:14:05Z |
| publishDate | 2018-05-01 |
| publisher | Hamadan University of Medical Sciences |
| record_format | Article |
| series | Muhandisī-i bihdāsht-i ḥirfah/ī |
| spelling | doaj.art-c7b0cb6b09d742409974690c9af92dac2022-12-21T19:39:36ZfasHamadan University of Medical SciencesMuhandisī-i bihdāsht-i ḥirfah/ī2383-33782383-33782018-05-015181510.21859/johe-5.1.8The Impact of Chemical and Thermal Refining on Adsorption Capacity of Iranian Natural DiatomiteHosein Shojaee Farah Abady0Hasan Assilian Mahabady1Ali Khavanin2Mahdi Abbaszadeh3Department of Occupational Health Engineering, School of Health, Zabol University of Medical Sciences, Zabol, IranDepartment of Occupational Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, IranAssociate Professor, School of Medicine, Tarbiat Modares University, Tehran, IranMSc of Occupational Health Engineering, School of Medicine, Tarbiat Modares University, Tehran, IranIntroduction: One of the factors that affects the rate of adsorption and removal of pollutants is the level of bed surface. Today, the use of active carbon substrates, synthetic zeolite such as Y and ZSM-5, are of great efficiency due to their high surface. In this research, diatomite modification was carried out using chemical and thermal processes to increase the bed surface and also the amount of adsorption capacity. Methods: After washing with distilled water the crude sample of diatomite was purified with 1 M solution of hydrochloric acid in two stages of 6 hours under the temperature of 70 degrees and finally it was calcinated at the temperature of 750 degrees for 4 hours. Eventually, its characteristics’ such as Specific surface area, the pure distribution, sorption – desorption isotherms and its adsorption capacity was studied. Results: Acid refinication increases the specific surface area 2.2 times compared to an example of which only washed with deionized water. Furthermore, the rate of SiO2 reached 88 %. By calcinating the sample, the specific surface decreased 16.4 % and crystalline structure Increased. The results of XRF and XRD indicated that most of diatomite combination was respectively cristobalite, quartz and feldspar. And also the amount of adsorption capacity at Break point and saturation after modification was respectively 131% and 97% increased. Conclusion: results indicated that with the modification of diatomite, and its calcinating at the temperature of 750 degrees, surface area and adsorption capacity increased, but did not increase significantly compared to the existing substrates such as active carbon and synthetic zeolite types and its Requires to more study.http://johe.umsha.ac.ir/article-1-323-en.pdfAdsorptionDiatomiteHeat TreatmentHydrochloric AcidSpecific Surface |
| spellingShingle | Hosein Shojaee Farah Abady Hasan Assilian Mahabady Ali Khavanin Mahdi Abbaszadeh The Impact of Chemical and Thermal Refining on Adsorption Capacity of Iranian Natural Diatomite Muhandisī-i bihdāsht-i ḥirfah/ī Adsorption Diatomite Heat Treatment Hydrochloric Acid Specific Surface |
| title | The Impact of Chemical and Thermal Refining on Adsorption Capacity of Iranian Natural Diatomite |
| title_full | The Impact of Chemical and Thermal Refining on Adsorption Capacity of Iranian Natural Diatomite |
| title_fullStr | The Impact of Chemical and Thermal Refining on Adsorption Capacity of Iranian Natural Diatomite |
| title_full_unstemmed | The Impact of Chemical and Thermal Refining on Adsorption Capacity of Iranian Natural Diatomite |
| title_short | The Impact of Chemical and Thermal Refining on Adsorption Capacity of Iranian Natural Diatomite |
| title_sort | impact of chemical and thermal refining on adsorption capacity of iranian natural diatomite |
| topic | Adsorption Diatomite Heat Treatment Hydrochloric Acid Specific Surface |
| url | http://johe.umsha.ac.ir/article-1-323-en.pdf |
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