Lalitha, PRenugadevi, N2017-02-152017-02-152011https://ir.avinuty.ac.in/handle/avu/1393Malachite green is traditionally used for dyeing cotton, jute, silk, wool leather, etc. Despite its industrial importance, malachite green poses several risks to the consumers. Therefore, ef fect ive removal of malachi te green f rom was tewater is necessary. The present s tudy involves kinetic modeling of the process of adsorption of malachite green from aqueous solution onto a low cost carbon adsorbent prepared f rom Ceasalpinia. Wi th increase in contact time of adsorption f rom 10 to 180 min, the % adsorption was found to increase from ~ 8% to 29% wi th 100 mg/L at pH 2.87 with 300 mg of the adsorbent. The adsorption kinetics of malachite green onto the low-cost adsorbent used in this study fol lowed first er Lagergren rate equation. The intraparticle diffusion study shows that the rate con- __.Its for intraparticle diffusion (K^) increased with the increase in initial concentration of malachite green solution. Intraparticle diffusion is not the sole rate limiting factor for the adsorption of malachite green.