NGHIÊN CỨU CHẾ TẠO VẬT LIỆU TỔ HỢP PANi/BÃ MÍA ĐỊNH HƯỚNG HẤP PHỤ AMONI TRONG NƯỚC=STUDY ON MANUFACTURING PANi/SUGARCANE BAGASSE COMPOSITE FOR AMMONIUM ADSORPTION IN AQUEOUS SOLUTION

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Tác giả: Thùy Linh Đinh, Thủy Tiên Đỗ, Thị Ngọc Ánh Nguyễn, Thị Phương Anh Nguyễn, Quang Huy Phạm

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2024

Mô tả vật lý: tr.263 - 270

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ID: 484671

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In this study, PANi-based composite material with sugarcane bagasse as carrier (PANi/sugarcane bagasse) were synthesized by chemical method and used to adsorb ammonium in aqueous solution. The characteristics of PANi/sugarcane bagasse were evaluated by scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR) and Brunauer–Emmett–Teller (BET) surface area. The ammonium adsorption capacity of the material was investigated by studying the effects of solution pH, adsorption time and initial ammonium concentration. The adsorption isotherm was studied based on the Langmuir and Freundlich isotherm adsorption models. The results show that the adsorption process follows the Langmuir isotherm adsorption model with the maximum ammonium adsorption capacity of PANi/sugarcane bagasse estimated to be 87.72 mg.g-1 at an initial ammonium concentration of 20 mg/L, pH = 6, material content of 0.6 g/L and contact time of 20 min. The PANi/ sugarcane bagasse composite material promises to be a material capable of treating ammonium in water quite well.Trong nghiên cứu này, vật liệu tổ hợp gốc PANi với chất mang là bã mía (PANi/bã mía) được tổng hợp bằng phương pháp hóa học và được sử dụng để hấp phụ amoni trong nước. Đặc điểm bề mặt của vật liệu PANi/bã mía được đánh giá bằng kính hiển vi điện tử quét (SEM), phổ hồng ngoại biến đổi Fourier (FTIR) và diện tích bề mặt riêng Brunauer – Emmett – Teller (BET). Khảo sát khả năng hấp phụ amoni của vật liệu thông qua nghiên cứu ảnh hưởng của pH dung dịch, thời gian hấp phụ và nồng độ amoni ban đầu. Đẳng nhiệt hấp phụ được nghiên cứu dựa trên mô hình hấp phụ đẳng nhiệt Langmuir và Freundlich. Kết quả cho thấy quá trình hấp phụ tuân theo mô hình hấp phụ đẳng nhiệt Langmuir với dung lượng hấp phụ amoni cực đại của PANi/bã mía ước tính là 87,72 mg/g ở nồng độ amoni ban đầu là 20 mg/L, pH = 6, hàm lượng vật liệu hấp phụ là 0,6 g/L và thời gian hấp phụ là 20 phút. Vật liệu tổ hợp PANi/bã mía hứa hẹn sẽ là một vật liệu có khả năng xử lý khá tốt amoni trong nước.

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