Removal of nickel and kadmium in the water by bentonite

The preparation of the study was carried out to determine the removal of nickel and cadmium from the aqueous solutions of bentonite treatment by adsorption method. The experiments, where optimum removal conditions were presented, were carried out for two metals. The adsorption efficiency of adsorbent dosage, contact time, tem-perature and adsorbent size parameters were investigated. For the initial concentration of 0,1 mg / L (100 ppb), the optimal adsorbent dosage is 3 g / 25 mL for nickel removal and 1 g / 25 mL for cadmium. Adsorption equilibrium was reached in 30 chambers for nickel and cadmium removal. Maximum adsorption efficiency in two heavy metals at 40 ° C was achieved. The highest yield was obtai-ned with 0.5 mm bentonite in terms of adsorbent size and> 2 mm in cadmium remo-val. The process was found to be in accordance with Langmuir isotherm model. As a result, it has been concluded that bentonite can be used as an effective and eco-nomical adsorbent to remove nickel and cadmium ions from aqueous solutions.