Nghiên cứu sử dụng đá ong biến tính trong quá trình Fenton dị thể để xử lý chất nhuộm màu = Study on using modified laterite in the heterogeneous Fenton process for removing dye compound

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Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Phát triển Khoa học & Công nghệ: Khoa học Trái đất và Môi trường, 2019

Mô tả vật lý: tr.56

Bộ sưu tập: NCBI

ID: 582984

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In this work, laterite was modified by iron (III) sulfate (Lat-Fe), and it was used in heterogeneous Fenton for the removal of Reactive Yellow 160 dye (RY 160). Properties of chemical composition, surface morphology and specific surface area of modified laterite were characterized by Energy dispersive X-ray spectroscopy (EDX), scanning electron microscopes (SEM) and BET method and that laterite was assessed effectively to apply in the heterogeneous Fenton process. Experimental investigations about conditions such as pH, H2O2 oncentration, and modified materials were conducted to look for the suitable conditions for removing dye compound by Fenton process. Studied results showed that modified laterite by procedure without iron Fe3+ had not catalyzed activation in Fenton process. However, using modified laterite by iron (III) sulfate (Lat-Fe) get good results in the heterogeneous Fenton process for removing Reactive Yellow 160 dye. Removing ReactiveYellow 160 dye (RY 160) with initial concentration of 50ppm with investigated optimal conditions of Lat-Fe: 1,25g/L, H2O2 2,45 mM, pH 7 at 30oC get 70% of removal efficiency in 120 minutes. Trong nghiên cứu này, đá ong được biến tính bằng muối sắt (III) sunfat (Lat-Fe) sử dụng cho quá trình Fenton dị thể để loại bỏ chất nhuộm màu hữu cơ Reactive Yellow 160 (RY 160). Các đặc trưng cơ bản về thành phần hoá học, hình thái bề mặt và diện tích bề mặt riêng của đá ong sau biến tính được xác định thông qua phổ tán xạ năng lượng EDX, ảnh hiển vi điện tử quét SEM và phương pháp đo diện tích bề mặt riêng BET và được đánh giá hiệu quả tốt để có thể ứng dụng trong quá trình Fenton dị thể. Các khảo sát thực nghiệm về điều kiện tiến hành như pH, lượng chất oxy hóa H2O2, lượng vật liệu biến tính được thực hiện để tìm ra điều kiện thích hợp cho quá trình Fentonxử lý chất nhuộm màu. Kết quả thí nghiệm cho thấy: đá ong khi biến tính theo quy trình không có muối sắt thì hầu như không có hoạt tính xúc tác cho quá trình Fenton. Mặt khác, đá ong được biến tính bằng muối sắt có hoạt tính xúc tác, cho kết quả xử lý màu rất tốt khi sử dụng vào quá trình Fenton dị thể xử lý hợp chất nhuộm màu RY160. Loại bỏ RY 160 với nồng độ ban đầu 50 ppm tại các điều kiện thích hợp: Lat-Fe 1,25g/L, nồng độ H2O2 2,45 mM, pH khởi đầu là 7, nhiệt độ 30◦C
cho hiệu quả xử lý đạt 70% trong th ời gian xử lý 120 phút.

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