Investigation of Benzoic Acid Adsorption on to ODTMA-Bentonite by Response Surface Optimization
The adsorption of benzoic acid on to a modified bentonite (ODTMA-bentonite) was studied. ODTMA-bentonite was synthesized by the incorporation of a quaternary ammonium surfactant (octadecyltrimethylammonium bromide) on to Ç ankiri sodium bentonite (Ç Na-B) with a cation-exchange capacity of 85 mequiv...
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| Format: | Article |
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SAGE Publishing
2002-10-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361702321104237 |
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| author | H. Kapucu N. Yildiz R. Gönülşen A. Ç Çalimli |
| author_facet | H. Kapucu N. Yildiz R. Gönülşen A. Ç Çalimli |
| author_sort | H. Kapucu |
| collection | DOAJ |
| description | The adsorption of benzoic acid on to a modified bentonite (ODTMA-bentonite) was studied. ODTMA-bentonite was synthesized by the incorporation of a quaternary ammonium surfactant (octadecyltrimethylammonium bromide) on to Ç ankiri sodium bentonite (Ç Na-B) with a cation-exchange capacity of 85 mequiv/100 g clay. A 2 4 full factorial central composite experimental design followed by multi-stage Monte-Carlo optimization was used in designing the experiments and analyzing the results. This procedure limited the number of actual experiments performed whilst allowing for possible interactions between the four parameters studied. These parameters were temperature (20–40°C), agitation rate (30–170 rpm), the amount of organobentonite used (0.1–1.5 g) and the initial benzoic acid concentration (40–200 mg/l). Of these parameters, the amount of organobentonite and the temperature had significant effects in comparison with the agitation rate and initial benzoic acid concentration. To effect the maximum adsorption of benzoic acid on to ODTMA-bentonite, the optimum values for the tested variables over the selected ranges were as follows: initial concentration of benzoic acid = 200 mg/l, agitation rate = 170 rpm, amount of organobentonite = 1.5 g and temperature = 40°C. The coefficient of determination (R 2 ) for the model employed was 0.99343 with a probability value of 9.44 × 10 −14 (p-value < 0.01). This p-value indicates a very high significance for the regression model. The maximum adsorbed concentration of benzoic acid predicted by the equation (169.05 mg/l) agreed well with the value (163 mg/l) obtained from the experimental data measured under optimum conditions. |
| format | Article |
| id | doaj-art-6fa1e90d8d5841dcbb9dd109ec71b176 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2002-10-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-6fa1e90d8d5841dcbb9dd109ec71b1762025-02-03T10:08:00ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382002-10-012010.1260/026361702321104237Investigation of Benzoic Acid Adsorption on to ODTMA-Bentonite by Response Surface OptimizationH. Kapucu0N. Yildiz1R. Gönülşen2A. Ç Çalimli3 Pak Gida Üretim ve Pazarlama A.Ş., POB 149, 41001 İzmit, Kocaeli, Turkey Department of Chemical Engineering, Faculty of Engineering, Ankara University, 06100 Tandoǧan-Ankara, Turkey Department of Chemical Engineering, Faculty of Engineering, Ankara University, 06100 Tandoǧan-Ankara, Turkey Department of Chemical Engineering, Faculty of Engineering, Ankara University, 06100 Tandoǧan-Ankara, TurkeyThe adsorption of benzoic acid on to a modified bentonite (ODTMA-bentonite) was studied. ODTMA-bentonite was synthesized by the incorporation of a quaternary ammonium surfactant (octadecyltrimethylammonium bromide) on to Ç ankiri sodium bentonite (Ç Na-B) with a cation-exchange capacity of 85 mequiv/100 g clay. A 2 4 full factorial central composite experimental design followed by multi-stage Monte-Carlo optimization was used in designing the experiments and analyzing the results. This procedure limited the number of actual experiments performed whilst allowing for possible interactions between the four parameters studied. These parameters were temperature (20–40°C), agitation rate (30–170 rpm), the amount of organobentonite used (0.1–1.5 g) and the initial benzoic acid concentration (40–200 mg/l). Of these parameters, the amount of organobentonite and the temperature had significant effects in comparison with the agitation rate and initial benzoic acid concentration. To effect the maximum adsorption of benzoic acid on to ODTMA-bentonite, the optimum values for the tested variables over the selected ranges were as follows: initial concentration of benzoic acid = 200 mg/l, agitation rate = 170 rpm, amount of organobentonite = 1.5 g and temperature = 40°C. The coefficient of determination (R 2 ) for the model employed was 0.99343 with a probability value of 9.44 × 10 −14 (p-value < 0.01). This p-value indicates a very high significance for the regression model. The maximum adsorbed concentration of benzoic acid predicted by the equation (169.05 mg/l) agreed well with the value (163 mg/l) obtained from the experimental data measured under optimum conditions.https://doi.org/10.1260/026361702321104237 |
| spellingShingle | H. Kapucu N. Yildiz R. Gönülşen A. Ç Çalimli Investigation of Benzoic Acid Adsorption on to ODTMA-Bentonite by Response Surface Optimization Adsorption Science & Technology |
| title | Investigation of Benzoic Acid Adsorption on to ODTMA-Bentonite by Response Surface Optimization |
| title_full | Investigation of Benzoic Acid Adsorption on to ODTMA-Bentonite by Response Surface Optimization |
| title_fullStr | Investigation of Benzoic Acid Adsorption on to ODTMA-Bentonite by Response Surface Optimization |
| title_full_unstemmed | Investigation of Benzoic Acid Adsorption on to ODTMA-Bentonite by Response Surface Optimization |
| title_short | Investigation of Benzoic Acid Adsorption on to ODTMA-Bentonite by Response Surface Optimization |
| title_sort | investigation of benzoic acid adsorption on to odtma bentonite by response surface optimization |
| url | https://doi.org/10.1260/026361702321104237 |
| work_keys_str_mv | AT hkapucu investigationofbenzoicacidadsorptionontoodtmabentonitebyresponsesurfaceoptimization AT nyildiz investigationofbenzoicacidadsorptionontoodtmabentonitebyresponsesurfaceoptimization AT rgonulsen investigationofbenzoicacidadsorptionontoodtmabentonitebyresponsesurfaceoptimization AT accalimli investigationofbenzoicacidadsorptionontoodtmabentonitebyresponsesurfaceoptimization |