Preparation and characterization of Na-A zeolite from aluminum scrub and commercial sodium silicate for the removal of Cd2+ from water
| Autor: | Mohamed M. Selim, Reham M.M. Aboelenin, Sohair A. Sayed Ahmed, Ghada M. Mohamed, Doaa M. EL-Mekkawi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Sodium aluminate General Mathematics Inorganic chemistry Sodium silicate 02 engineering and technology 010501 environmental sciences 01 natural sciences General Biochemistry Genetics and Molecular Biology chemistry.chemical_compound symbols.namesake Specific surface area General Materials Science Zeolite 0105 earth and related environmental sciences General Environmental Science Ion exchange Precipitation (chemistry) Langmuir adsorption model Sorption General Chemistry 021001 nanoscience & nanotechnology General Energy chemistry symbols 0210 nano-technology General Agricultural and Biological Sciences |
| Zdroj: | Journal of the Association of Arab Universities for Basic and Applied Sciences. 24:19-25 |
| ISSN: | 1815-3852 |
| DOI: | 10.1016/j.jaubas.2017.05.002 |
| Popis: | In this work, a low cost preparation scheme of Na-A zeolite from low cost materials was described. Aluminum scrubs were used to prepare sodium aluminate. Commercial sodium silicate and sodium aluminate were then used in the synthesis of zeolite through hydrothermal method under mild conditions. X-ray fluorescence (XRF), X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques were employed to confirm the synthesis of pure Na-A zeolite phase. The specific surface area (BET) of the prepared zeolite has also been measured. Results indicated that zeolite has relatively high surface area (=374 m2/g). The performance of the prepared zeolite in the removal of Cd2+, a highly toxic heavy metal, from water was investigated. The removal of Cd2+ from water which occurred through precipitation and ion exchange mechanisms was seen to be more efficient comparing to the previous studies. The maximum sorption capacity of Cd2+ was found to be 54.05 meq/100 g according to the Langmuir isotherm model. However, the sorption capacity was found to be 84.09 meq/100 g after 4 repetitions which is attributed to the ease of reaching the Cd2+ ions to the inner pores of zeolite upon using slightly dilute Cd2+ solutions in each repetition. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|