Removal of phosphate ions from wastewater by treated hydrogel based on chitosan
| Autor: | Eman M. Shoukry, Aya H. Abdulghany, Mohamed Abdel Khalek, Ghada I. Mahmoud, Mona Amin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
food.ingredient Langmuir adsorption model 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology Methacrylate Phosphate 01 natural sciences Gelatin Chitosan chemistry.chemical_compound symbols.namesake food Adsorption chemistry Thiourea symbols Thiol 0210 nano-technology 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Egyptian Journal of Chemistry. |
| ISSN: | 2357-0245 |
| DOI: | 10.21608/ejchem.2019.9627.1646 |
| Popis: | Chitosan/ Gelatin/2-(Dimethylamino) ethyl methacrylate (Cs/Gltn/PDMAEMA) hydrogel was synthesized by gamma irradiation for the expulsion of phosphate ions from wastewater. Chemical adjustment of the hydrogel with thiourea was performed to introduce thiol groups Cs/Gltn/PDMAEMA-treated. More over trapping of SiO2 into the hydrogel matrix to acquire Cs/Gltn/PDMAEMA/SiO2 composite. It was found that the gelation increases with increasing PDMAEMA content in the hydrogel. The maximum gelation performed at an equal ratio of Cs/Gltn at a radiation dose of 15 kGy. The adsorption capacities of the prepared systems towards phosphate ions were investigated. It was obtained that the maximum removal is achieved at pH 6 through 180 min. However, the removal percent decreases with increasing phosphate ions concentration and temperature. The ability of the prepared adsorbents towards phosphate ions removal are ascending ordered in the sequence of Cs/Gltn/PDMAEMA hydrogel, Cs/Gltn/PDMAEMA-treated , and Cs/Gltn/PDMAEMA/SiO2 composite. The pseudo-second-order equation fits well the adsorption kinetics. The adsorption isotherm follows the Freundlich model higher than the Langmuir model |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|