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

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Tác giả: Thuy Vi Vo

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Công nghệ và Thực phẩm (Tên mới: Tạp chí Khoa học Đại học Công Thương), 2022

Mô tả vật lý: tr.3

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ID: 333233

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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.Trong nghiên cứu này, một vật liệu sinh học chuẩn bị từ lá sả sau khi chưng cất tinh dầu được điều chế bằng phương pháp xử lý kiềm với NaOH 10%. Hiệu suất hấp phụ metylen xanh (MB) được khảo sát trong các điều kiện sau: liều lượng chất hấp phụ (0,02-0,4 mg), pH (2-10), và nồng độ MB (20 và 100 mg/L). Khi liều lượng chất hấp phụ và pH tăng lên, hiệu suất hấp phụ màu tăng lên. Các nghiên cứu động học cho thấy rằng quá trình hấp phụ MB tuân theo phương trình động học bậc hai với cân bằng hấp phụ sau 30 phút. Hiệu suất và dung lượng hấp phụ tại MB có nồng độ 20 mg/L là 90,9% và 6,30 mg/g khi sử dụng 0,1 g chất hấp phụ trong 30 phút. Kết quả nghiên cứu cho thấy bã lá sả sau khi xử lý kiềm là một vật liệu sinh học rẻ tiền và hiệu quả trong xử lý nước thải nhuộm.

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