Nghiên cứu tối ưu hóa điều kiện xử lý phenol trong nước thải phòng thí nghiệm bằng phương pháp oxy hóa nâng cao

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Tác giả: Văn Dưỡng Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Sức khỏe, 2024

Mô tả vật lý: tr.52

Bộ sưu tập: Báo, Tạp chí

ID: 341918

Thêm vào giỏ Liên kết toàn văn

. Introduction: Toxic organic substances such as phenol are usually very stable, and difficult to oxidize by common oxidizing agents. Finding a strong oxidizing agent that can oxidize stable and toxic organic substances into CO2 and H2O which are non-polluting substances is necessary. Aims, Subjects, and Methods: The study was carried to optimize the conditions of the advanced oxidation method for phenol treatment in wastewater by experimental chemical methods. Results: Phenol conversion increased over time, with time t = 180 minutes, phenol was almost completely converted (=98.57%). The best phenol removal efficiency under the following conditions: pH = 11, [Co2+]0 ≥ 10-3mol/l
[H4L]0: [Co2+]0 = 1
[H2O2]0 ≥ 10-2M, t = 180 min. Conclusion: The optimal conditions in the process of treating phenol with H2O2 under the catalytic effect of Co(II) – citric acid complex were pH = 11, [Co2+]0 ≥ 10-3 mol/l
[H4L]0: [Co2+]0 = 1
[H2O2]0 ≥ 10-2M, t ≥ 180 min. At optimal conditions and after 180 minutes, phenol is almost completely converted (= 98.57%), showing that the catalytic complex formed by Co2+ and H4L has very strong activity, the wastewater sample contains phenol after treatment. Management meets the criteria of QCVN 08- MT:2015/BTNMT.Đặt vấn đề: Các chất hữu cơ độc hại như phenol thường rất bền, khó bị oxy hóa bởi các tác nhân oxy hóa thông thường. Việc tìm ra tác nhân oxy hóa mạnh, có thể oxy hóa các chất hữu cơ bền, độc hại thành CO2 và H2O là những chất không gây ô nhiễm là cần thiết. Mục tiêu, đối tượng, phương pháp nghiên cứu: Đề tài được thực nhiện nhằm tối ưu hóa các điều kiện của phương pháp oxy hóa nâng cao ứng dụng xử lý phenol trong nước thải bằng các phương pháp hóa học thực nghiệm. Kết quả nghiên cứu: Độ chuyển hóa phenol tăng lên theo thời gian, với thời gian t = 180 phút thì phenol hầu như bị chuyển hóa hoàn toàn (α = 98,57%). Kết quả khảo sát hiệu suất xử lý COD tốt nhất tại các điều kiện: pH = 11, [Co2+]0 ≥ 10-3mol/l
[H4L]0: [Co2+]0 = 1
[H2O2]0 ≥ 10-2M, t ≥ 180 phút. Kết luận: Đã xác định được các điều kiện tối ưu trong quá trình xử lý phenol bằng H2O2 dưới tác dụng xúc tác của phức Co (II) – Axit xitric: pH = 11, [Co2+]0 ≥ 10-3 mol/l
[H4L]0: [Co2+]0 = 1
[H2O2]0 ≥ 10-2M, t ≥ 180 phút. Tại các điều kiện tối ưu và sau 180 phút, phenol gần như bị chuyển hóa hoàn toàn (α = 98,57%), chứng tỏ phức xúc tác tạo bởi Co2+ và H4L có hoạt tính rất mạnh, mẫu nước thải chứa phenol sau xử lý đạt QCVN 08-MT:2015/BTNMT.

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