Adsorption Property of Aniline on Bamboo-Charcoal

The adsorption property of aniline on bamboo-charcoal was studied in aqueous solution. Parameters such as contact time, pH, mass of absorbent, adsorption temperature, and initial concentration of aniline in solution were also studied. The result shows that adsorption equilibrium time is 360 min. The bamboo-charcoal showed high adsorption ability for aniline at a wide pH range(pH 4.0~6.4), the optimized adsorption acidity of bamboo-charcoal for aniline is pH 5.90 in HAc-NaAc medium. As initial concentration of aniline is 0.060 mg·mL－1, the equilibrium adsorption amounts is 44.5 mg·g-1. The aniline can be removed from aqueous solution effectively with bamboo-charcoal. As the adsorption temperature increases, the adsorption decrease. And it has been proved that the adsorption process is an exothermic process. The adsorption behavior of bamboo-carbon for aniline obeys the Freundlich isotherm model. The used bamboo-charcoal is treated with microwave by heating in 0.8 mol·L－1 H2SO4, the adsorption ability can be regenerated to 97%. As absorptive material, the bamboo-charcoal can be applied to remove aniline from wastewater.