Investigation of the success of physical and chemically modified process waste in heavy metal removal from synthetic wastewater

Abstract

This study investigated removal efficiency of nickel in adsorption system by using the process waste obtained from the exit point of ore processing, modified with ultrasound and acid in laboratory. The experimental study was conducted in an intermittent process by taking into account the criteria of different adsorbent dosages (0,1-5 g/100 mL), pH (2-10), contact times (0-150 minutes) and mixing speeds (100-400 rpm). During experimental optimization, 100 mg/L initial nickel solution concentration, pH original (5.8), adsorbent dose 8 g /L, contact time 40 minutes, mixing speed 200 rpm, temperature 298 Kelvin (250C) was determined. Chemical properties and SEM images pertaining to modified process waste (MPA) were specified. In nickel removal, it was observed that the obtained results were found more concordant with Langmuir Isotherm models as evidenced by correlation coefficients. Kinetics data were obtained from treatment results, and qmax value obtained for MPA was found as 25.77 mg/g.