Nghiên cứu đánh giá hiệu quả xúc tác quang hóa của hệ UV/S2O8/TiO2 và UV/H2O2/TiO2 trong phản ứng phân hủy các chất kháng sinh

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Tác giả: Duy Trinh Nguyễn, Hữu Vinh Nguyễn, Thị Thương Nguyễn, Xuân Linh Nông, Văn Thuận Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 571.456 *Ultraviolet radiation

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Nguyễn Tất Thành, 2020

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Bộ sưu tập: Metadata

ID: 493325

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In this study, the photocatalytic effect of decomposition of sulfamethoxazole (SMX) using UV/S2O8/TiO2 and UV/H2O2/TiO2 systems was evaluated under the influence of different conditions, including the effects of Na, K, Ca2+, Mg2+ cations and NO3, Cl, and SO42- anions. The results indicate that about 82.36% SMX was removed after 180 minutes of lighting using UV/S2O8/TiO2 catalytic system. In addition, the results also showed that anion and cation have a strong influence on photocatalytic activity of SMX decomposition on UV/S2O8/TiO2 system. The photocatalytic activity slightly increased in the presence of Cl anion and Na cation, and about 89.78% SMX was removed after 180 minutes of illumination Meanwhile, SMX degradation photocatalytic activity significantly reduced in the presence of SO42-anion and K cation, approximately 53.70%, and 60.73% SMX were removed after the180 minutes of lighting in the appearance of SO42- anion and K cation, respectively.Trong nghiên cứu này, hiệu quả quang xúc tác phân hủy hợp chất kháng sinh sulfamethoxazole (SMX) sử dụng hệ xúc tác UV/S2O8/TiO2 và UV/H2O2/TiO2 được đánh giá dưới sự ảnh hưởng của các điều kiện khác nhau, bao gồm ảnh hưởng của các cation Na, K, Ca2+, Mg2+ và các anion NO3, Cl và SO42-. Kết quả nghiên cứu chỉ ra rằng, SMX phân hủy tốt nhất khi hệ xúc tác UV/S2O8/TiO2 được sử dụng, khoảng 82,36% SMX được loại bỏ sau 180 phút chiếu sáng. Ngoài ra, kết quả nghiên cứu cũng cho thấy anion và cation có ảnh hưởng mạnh đến hoạt tính quang xúc tác phân hủy SMX trên hệ xúc tác UV/S2O8/TiO2. Hoạt tính quang xúc tác tăng nhẹ khi có sự hiện diện của anion Cl và cation Na, khoảng 89,78% SMX được loại bỏ sau 180 phút chiếu sáng. Trong khi đó, hoạt tính quang xúc tác phân hủy SMX giảm đáng kể dưới sự hiện diện của anion SO42- và cation Ktương ứng với 53,70% và 60,73% SMX được loại bỏ sau 180 phút chiếu sáng...

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