The effect of mixing speed and contact time on the process of dye adsorption using corncobs adsorbent

Abstract

The home screen printing industry generally discharges wastewater directly into drainage without being processed first. By utilizing corncobs waste will reduce the amount of waste in the environment. The purpose of this study is to find out the optimum removal efficiency using corncobs in the removal of dyes. The manufacture of adsorbents using corncobs was dried and carbonized using a kiln to become charcoal powder. After the carbonization process, activated it using H2SO4. The dye adsorption process was carried out with variations in speed of 50, 75, 100, 125, and 150 rpm, variations in contact time of 0, 30, 45, 60, 90, and 120 minutes. From the results of this study it was found that the optimum conditions with a dye removal efficiency of 99.98% were obtained when the mixing speed was 100 rpm, contact time was 60 minutes, and the adsorbent dose was 10 g / L. From these results it can be said that the corncobs adsorbent is effective in removing the screen printing wastewater dye.