ADSORPTION OF METHYLENE BLUE ON WASTES FROM LEMONGRASS LEAVES AFTER ESSENTIAL OIL EXTRACTION

Tóm tắt

In this study, a biosorbent from lemongrass leaf after the distillation of essential oil was prepared by the alkali treatment with NaOH 10%. The removal of Methylene blue (MB) was tested under the following conditions: adsorbent dose (0.02-0.4 mg), pH (2-10), and dye concentration (20 and 100 mg/L). When the adsorbent dose and pH were raised, the percentage removal and adsorption capacity of dye increased. The kinetic studies revealed that the MB adsorption process complied with the pseudo-second-order model with a 30-min adsorption equilibrium. The percentage removal and adsorption capacity of MB at a concentration of 20 mg/L were 90.9% and 6.30 mg/g at the adsorbent dose of 0.1g in 30 min. According to the findings, alkali-treated lemongrass waste is an inexpensive and effective biosorbent in treating dye wastewater.