Chế tạo vật liệu bentonite biến tính bằng citric acid để xử lý methylene blue trong nước

Các tác giả

  • Thị Xuân Mai Trần
  • Thị Ngọc Quí Nguyễn
  • Văn Thắng Bùi

DOI:

https://doi.org/10.52714/dthu.14.2.2025.1435

Tóm tắt

Để giải quyết vấn đề ô nhiễm nguồn nước nghiêm trọng do chất thải dệt nhuộm gây ra, bentonite  biến tính bằng citric acid (BCA) được điều chế bằng cách hoạt hóa bentonite thô trực tiếp với citric acid. Sản phẩm được xác định bằng phương pháp phổ nhiễu xạ tia X và phổ FTIR. Một số yếu tố ảnh hưởng đến quá trình hấp phụ methylene blue (MB) của BCA như lượng chất hấp phu, thời gian, nồng độ, nhiệt độ đã được khảo sát. Kết quả khảo sát cho thấy, dung lượng hấp phụ tăng khi lượng chất hấp phụ, nồng độ và thời gian và nhiệt độ tăng. Quá trình hấp phụ MB trên BCA phù hợp với mô hình đẳng nhiệt Langmuir, với dung lượng hấp phụ đạt 244,45 mg/g. Động học hấp phụ MB trên BCA phù hợp với mô hình động học biểu kiến bậc 2. Quá trình hấp phụ MB trên vật liệu là quá trình thu nhiệt và tự xảy ra. Từ các kết quả cho thấy, BCA là một chất hấp phụ tiềm năng trong việc loại bỏ thuốc nhuộm từ dung dịch nước. 

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Đã Xuất bản

2024-12-14

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Khoa học Tự nhiên (Tiếng Việt)