20 research outputs found
Adsorption of chromium from aqueous solution by activated alumina and activated charcoal
Original article can be found at: http://www.sciencedirect.com/science/journal/09608524 Copyright Elsevier Ltd. DOI : 10.1016/j.biortech.2006.03.018Cr (VI) is considered to be potentially carcinogenic to humans. Removal of Cr (VI) ions from aqueous solution under different conditions was investigated using activated alumina (AA) and activated charcoal (AC) as adsorbents. Batch mode experiments were conducted to study the effects of adsorbent dose, contact time, pH, temperature and initial concentration of Cr (VI). Results showed that the adsorption of Cr (VI) depended significantly on pH and temperature. Equilibrium studies showed that Cr (VI) had a high affinity for AA at pH 4 and AC at pH 2. For AA, maximum adsorption was found at 25°C, indicating exothermic adsorption, while for AC, maximum adsorption was at 40°C. Freundlich and Langmuir adsorption isotherms were also applied and they showed good fits to the experimental data. The results suggest that both AA and AC could be used as effective adsorbents for the removal of Cr (VI) ions.Peer reviewe
Metal tolerance and sequestration of Ni(II), Zn(II) and Cr(VI) ions from simulated and electroplating wastewater in batch process: Kinetics and equilibrium study
International audienc
Statistical modelling and optimization of substrate composition for bacterial growth and cadmium removal using response surface methodology
International audienc
Sorption of heavy metals from electroplating effluent using immobilized biomass Trichoderma viride in a continuous packed-bed column
International audienc