Cadmium Removal from Aqueous Solution by Canola

Cadmium is a hazardous non-biodegradable material that enters the food chain. In this study, the removal of cadmium from aqueous solutions by Canola residues (a natural biosorbent) was investigated. The effect of parameters such as contact time, pH, cadmium concentration and adsorbent dose were evaluated, the results showed that increasing of pH, contact time and adsorbent caused increasing of efficiency of removal cadmium from aqueous solutions. A comparison between non-linear and linear of estimating the isotherm and kinetic parameters was discussed. The results confirmed that the non-linear method was a more efficient method to gain isotherm and kinetic parameters.