Comparative Study of Direct Red 81 Sorption using Date Pits Waste

Abstract

This study evaluates the ability of recycled date pit waste for dye sorption. The potential of natural date pits waste (NDP) to remove direct red 81 from an aqueous solution was compared with activated date pits (ADP) and commercial activated carbon (CAC). The effect of operating parameters such as initial pH, initial dye concentration, and contact time were investigated in batch system. The maximum capacity of sorption reaches 3.06 mg/g 1.29 mg/g and 19.23 mg/g for (NDP); (ADP) and (CAC), respectively, showing the potential of natural date pits to direct red 81 removal. The pseudo-second-order kinetic model has proved favorable for (RD81) sorption by (NDP), (ADP), and (CAC). The prepared materials were analyzed using FT-IR spectroscopy before and after direct red 81 sorption, to detect the major functional groups related to the sorption process.