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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | El-Bindary, Ashraf A. El-Sonbati, Adel Z. Mohamed, Khaled S. Farid, Mansour A. Al-Sarawy, Ahmad A. |
| Description | Author Affiliation: El-Bindary AA ( Department of Chemistry, Faculty of Science, University of Damietta, Damietta 34517, Egypt. Electronic address: abindary@yahoo.com.); El-Sonbati AZ ( Department of Chemistry, Faculty of Science, University of Damietta, Damietta 34517, Egypt.); Al-Sarawy AA ( Department of Mathematical and Physical Engineering, Faculty of Engineering, University of Mansoura, Mansoura, Egypt.); Mohamed KS ( Engineering Chemistry Department, Higher Institute for Engineering and Technology, Damietta, Egypt.); Farid MA ( Department of Chemistry, Faculty of Science, University of Damietta, Damietta 34517, Egypt.) |
| Abstract | In this research, activated carbonmade from rice straw (ACRS) was synthesized simply by a low cost and nontoxic procedure and used for the adsorption of hazardous azopyrazole dye. The effect of different variables in the batch method as a function of solution pH, contact time, concentration of adsorbate, adsorbent dosage and temperature were investigated and optimal experimental conditions were ascertaine. Surface modification of ACRS using scanning electron microscopy (SEM) was obtained. More than 75% removal efficiency was obtained within 75min at adsorbent dose of 0.5g for initial dye concentration of 30-100mgL(-1) at pH 3. The experimental equilibrium data were tested by the isotherm models namely, Langmuir and Freundlich adsorption and the isotherm constants were determined. The kinetic data obtained with different initial concentration and temperature were analyzed using a pseudo-first-order and pseudo-second-order equations. The activation energy of adsorption was also evaluated and found to be +13.25kJmol(-1) indicating that the adsorption is physisorption. The thermodynamics of the adsorption indicated spontaneous and exothermic nature of the process. The results indicate that ACRS could be employed as low-cost material for the removal of acid dyes from aqueous solution. |
| ISSN | 13861425 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Volume Number | 136 Pt C |
| e-ISSN | 18733557 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-02-05 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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