Adsorption of water-soluble dyes by peanut hulls

Abstract

In this study, removal of water-soluble dyes from aqueous solution by peanut hull as adsorbent was investigated. Breeding of peanut hull were KAC431 and KAC1. Water-soluble dyes in this study are direct yellow, direct red. Reactive blue and reactive yellow dyes. The suspendion was stirred for 25 hours at 30 degrees celsius and 1 atm. Parameters such as initial concentration of dye solution of 10, 30, and 50 milligram per liter, pH of initial dye solution of 5, 7, and 9, and particle size of adsorbent of 0.150-0.180, 0.180-0.210, and 0.210-0.300 millimeter are studied. The results show that peanut hull as adsorbent can be used to remove dye from aqueous solution. Direct yellow dye can be effectively adsorbed on both breeding of peanut hull when the initial concentration of dye solution is 50 milligram per liter, particle size of adsorbent is in the range of 0.150-0.180 millimeter, and initial pH of dye solution is 5. Adsorption ability of each type of dyes slightly decreases with increasing initial concentration of dye solutions. Adsorption ability of dye depends on components of dye i'n dye solution.