Chemical modification of brown algae Sargassum glaucescens for thorium biosorption from aqueous solutions
The biosorption process of thorium in a batch system by modified brown algae Sargassum glaucescens is discussed in this paper. For this purpose, the results of biosorption on raw algae and modified by glutaraldehyde and diethylenetriamine (DETA) were compared. Also, other variables that are necessar...
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| Format: | Article |
| Language: | fas |
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Nuclear Science and Technology Research Institute
2015-08-01
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| Series: | مجله علوم و فنون هسته‌ای |
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| Online Access: | https://jonsat.nstri.ir/article_78_43cc857ecc09935c07eac226d1376107.pdf |
| _version_ | 1797835097643155456 |
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| author | Alireza Keshtkar Mohammad Amin Hassani |
| author_facet | Alireza Keshtkar Mohammad Amin Hassani |
| author_sort | Alireza Keshtkar |
| collection | DOAJ |
| description | The biosorption process of thorium in a batch system by modified brown algae Sargassum glaucescens is discussed in this paper. For this purpose, the results of biosorption on raw algae and modified by glutaraldehyde and diethylenetriamine (DETA) were compared. Also, other variables that are necessary for adsorption process design such as optimum pH, time effect, biosorption isotherm, adsorbent dosage, number of biosorbent recovery stages for reuse were investigated. It was deduced that 10% of glutaraldehyde solution is the best. The experimental results indicated that the maximum sorption was observed at pH 3.5. The uptake was rapid and the biosorption process reached equilibrium within 6h of contact time at the optimum pH. The kinetics data were fitted well to Lagergren’s pseudo-second-order rate equation. Modeling of equilibrium sorption data with the Langmuir and Freundlich models (two-parameter models), and Redlich-Peterson three-parameter model indicated that the Redlich-Peterson model gave a better fitting to the experimental observations. The maximum thorium sorption was 151.52 mg Th/g adsorbent obtained from the Langmuir isotherm. The algae recovery by using 1 M HCl solution for biosorbent reuse showed that the biosorbent capacity decreases from 89.15 mg Th/g adsorbent at the first stage of recovery to 70.02 mg Th/g adsorbent at its fifth stage. |
| first_indexed | 2024-04-09T14:47:48Z |
| format | Article |
| id | doaj.art-6cdb3126f7b44821800d43a700695080 |
| institution | Directory Open Access Journal |
| issn | 1735-1871 2676-5861 |
| language | fas |
| last_indexed | 2024-04-09T14:47:48Z |
| publishDate | 2015-08-01 |
| publisher | Nuclear Science and Technology Research Institute |
| record_format | Article |
| series | مجله علوم و فنون هسته‌ای |
| spelling | doaj.art-6cdb3126f7b44821800d43a7006950802023-05-02T10:27:53ZfasNuclear Science and Technology Research Instituteمجله علوم و فنون هسته‌ای1735-18712676-58612015-08-01362202878Chemical modification of brown algae Sargassum glaucescens for thorium biosorption from aqueous solutionsAlireza Keshtkar0Mohammad Amin Hassani1پژوهشکده ی چرخه ی سوخت هسته ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایرانپژوهشکده ی چرخه ی سوخت هسته ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایرانThe biosorption process of thorium in a batch system by modified brown algae Sargassum glaucescens is discussed in this paper. For this purpose, the results of biosorption on raw algae and modified by glutaraldehyde and diethylenetriamine (DETA) were compared. Also, other variables that are necessary for adsorption process design such as optimum pH, time effect, biosorption isotherm, adsorbent dosage, number of biosorbent recovery stages for reuse were investigated. It was deduced that 10% of glutaraldehyde solution is the best. The experimental results indicated that the maximum sorption was observed at pH 3.5. The uptake was rapid and the biosorption process reached equilibrium within 6h of contact time at the optimum pH. The kinetics data were fitted well to Lagergren’s pseudo-second-order rate equation. Modeling of equilibrium sorption data with the Langmuir and Freundlich models (two-parameter models), and Redlich-Peterson three-parameter model indicated that the Redlich-Peterson model gave a better fitting to the experimental observations. The maximum thorium sorption was 151.52 mg Th/g adsorbent obtained from the Langmuir isotherm. The algae recovery by using 1 M HCl solution for biosorbent reuse showed that the biosorbent capacity decreases from 89.15 mg Th/g adsorbent at the first stage of recovery to 70.02 mg Th/g adsorbent at its fifth stage.https://jonsat.nstri.ir/article_78_43cc857ecc09935c07eac226d1376107.pdfbiosorptionbrown algae sargassumthoriumkineticadsorption isotherm |
| spellingShingle | Alireza Keshtkar Mohammad Amin Hassani Chemical modification of brown algae Sargassum glaucescens for thorium biosorption from aqueous solutions مجله علوم و فنون هسته‌ای biosorption brown algae sargassum thorium kinetic adsorption isotherm |
| title | Chemical modification of brown algae Sargassum glaucescens for thorium biosorption from aqueous solutions |
| title_full | Chemical modification of brown algae Sargassum glaucescens for thorium biosorption from aqueous solutions |
| title_fullStr | Chemical modification of brown algae Sargassum glaucescens for thorium biosorption from aqueous solutions |
| title_full_unstemmed | Chemical modification of brown algae Sargassum glaucescens for thorium biosorption from aqueous solutions |
| title_short | Chemical modification of brown algae Sargassum glaucescens for thorium biosorption from aqueous solutions |
| title_sort | chemical modification of brown algae sargassum glaucescens for thorium biosorption from aqueous solutions |
| topic | biosorption brown algae sargassum thorium kinetic adsorption isotherm |
| url | https://jonsat.nstri.ir/article_78_43cc857ecc09935c07eac226d1376107.pdf |
| work_keys_str_mv | AT alirezakeshtkar chemicalmodificationofbrownalgaesargassumglaucescensforthoriumbiosorptionfromaqueoussolutions AT mohammadaminhassani chemicalmodificationofbrownalgaesargassumglaucescensforthoriumbiosorptionfromaqueoussolutions |