نوع مقاله : علمی - پژوهشی
1 دانشجوی کارشناسی ارشد فرآوری مواد معدنی، دانشگاه صنعتی امیرکبیر
2 دانشیار گروه فرآوری مواد معدنی، دانشگاه صنعتی امیرکبیر
3 استادیار گروه فرآوری مواد معدنی، دانشگاه صنعتی امیرکبیر
عنوان مقاله [English]
Ion flotation includes removing of ions from solution by adding chemical reagents such as collectors in the presence of air bubbles. In this study, removal of Ni(II) cations was studied from low concentration synthetic wastewater using ion flotation method. Sodium dodecyl sulfate (SDS) and ethyl hexa decyl dimethyl ammonium bromide (EHDABr) were used as collectors and methyl isobutyl carbonyl (MIBC) and Dowfroth250 as frothers. To investigate the effective parameters, the experimental design was performed by DX7 software and two-level factorial method. Sixteen experiments including 6-level variables were designed. The tests were conducted in Hallimond tube. The best conditions for the removal of nickel with initial concentrations of 10 ppm were: pH=3, SDS= 300 ppm, Dowfroth 250= 90 ppm and air flow rate= 1.8 ml/min. Optimal results were evaluated in a mechanical flotation cell. In optimal condition, the recovery of nickel ions and water were 88% and 28.34% respectively at 60 min. This study showed ion flotation is a very effective method for nickel ions removal from industrial effluents.