Phân hủy siêu âm kháng sinh sulfamethoxazole trong nước sử dụng vật liệu xúc tác bùn đỏ và than sinh học từ trấu=Sonodegradation of Sulfamethoxazole in Water Using Red Mud and Rice Husk Biochar Catalysis

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Tác giả: Thị Mai Nguyễn

Ngôn ngữ: vie

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Thông tin xuất bản: Khoa học Trái đất và Môi trường, 2024

Mô tả vật lý: tr.20-29

Bộ sưu tập: Metadata

ID: 474312

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Nghiên cứu này được thực hiện để đánh giá hiệu quả của việc sử dụng bùn đỏ và than trấu (RMC) làm vật liệu xúc tác cho quá trình phân hủy bằng siêu âm nhằm loại bỏ kháng sinh Sulfamethoxazole (SMX) trong nước. Kính hiển vi điện tử truyền qua (TEM), nhiễu xạ tia X (XRD) và phổ tán sắc năng lượng tia X (EDX) được thực hiện để khảo sát tính chất của vật liệu xúc tác. Kết quả cho thấy, vật liệu RMC có chứa các nguyên tố C, O, Si và Fe với tỉ lệ % theo khối lượng lớn (lần lượt là 26,56%, 50,89%, 1,86% và 10,26%) và thành phần pha tinh thể cao nên rất thuận lợi cho các phản ứng phân hủy SMX trong nước dưới sự tác động của bức xạ siêu âm. Ảnh hưởng của các yếu tố như pH, thời gian, nồng độ đầu và khối lượng xác tác cũng được khảo sát. Kết quả cho thấy tại pH = 3, thời gian 180 phút, nồng độ đầu 20 mg/L và liều lượng vật liệu RMC 1,0 g/L thì hiệu suất phân hủy SMX đạt giá trị lớn nhất 75% và 15 mg SMX được xử lý bằng 1 g vật liệu RMC. Nghiên cứu này mở ra một hướng mới trong tận dụng nguồn chất thải để xử lý chất thải đạt hiệu quả cao.This research evaluated the effectiveness of sulfamethoxazole (SMX) antibiotic degradation in aqueous solution using red mud and rice husk biochar (RMC) as catalytic material for ultrasound-supported degradation process. Transmission Electron Microscopy (TEM), X-ray diffraction (XRD), and Energy-dispersive X-ray spectroscopy (EDX) were applied to study the characteristics of the catalytic material. The results demonstrated that the main components of RMC catalytic material are C, O, Si, and Fe elements with high weight percentage of 26.56%, 50.89%, 1.86% and 10.26%, respectively, and with high crystallized mix ratio. These are beneficial for SMX degradation reactions in water under the effect of ultrasound irradiation. The SMX degradation products were analyzed using High-performance liquid chromatography (HPLC). The effect of pH, contact time, initial concentration, and catalyst weight on degradation effectiveness were also investigated. The highest degradation efficiency of 75% at the treated rate of 15 mg SMX/g RMC was observed at pH = 3, contact time of 180 minutes, initial concentration of 20 mg SMX/L. This suggested a new solution to utilize the waste resources for waste treatment.

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