Removal of astrazon blue dye from aqueous media by a low-cost adsorbent from coal mining
| Autor: | Murilo Pereira Moisés, Eryza G. de Castro, Patricia P. dos Anjos, Matheus Felipe Viante, Andressa dos Santos, Anthony J. Downs, Naiane Naidek, C.A.P. Almeida |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
021110 strategic
defence & security studies Thermogravimetric analysis Municipal solid waste Aqueous solution Waste management Chemistry 0211 other engineering and technologies Infrared spectroscopy Ocean Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Pollution law.invention Adsorption Chemical engineering law Specific surface area Titration Calcination 0210 nano-technology Water Science and Technology |
| Zdroj: | Desalination and Water Treatment. 57:27213-27225 |
| ISSN: | 1944-3986 1944-3994 |
| Popis: | The aim of this study was to evaluate the removal of astrazon blue (AB) dye from aqueous solution by adsorption on an otherwise despoiling and useless mineral waste obtained from coal mining (MWCM) and how this was affected by calcination. The solid waste, as characterized by elemental and thermogravimetric analyses, X-ray diffraction, infrared spectroscopy, specific surface area measurements and Boehm titrations, was found to be composed primarily of calcite, dolomite, and gypsum. Experiments investigated how adsorption was affected particularly by the conditions of pre-calcination of the waste, and also by the contact time, initial AB dye concentration, pH, and temperature of the aqueous medium. Optimum performance was achieved with waste that had been pre-calcinated at 400°C, MWCM400. The kinetics, equilibrium, and thermodynamics of adsorption for MWCM400 were investigated in detail with results that could be satisfactorily rationalized by a pseudo-second-order kinetic model together with a Lan... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|