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Phương pháp tổng hợp dễ dàng các hợp chất từ nano từ có chức năng bề mặt để hấp phụ chọn lọc hiệu quả các phẩm nhuộm cation
Tóm tắt
Một loại nano hấp phụ từ tính mới, hạt nano từ Fe3O4 được biến đổi bằng polycatechol (Fe3O4/PCC MNPs) đã được chế tạo bằng phương pháp đồng kết tủa hóa học dễ dàng sử dụng muối sắt và dung dịch catechol làm nguyên liệu chính. Fe3O4/PCC MNPs có bề mặt mang điện tích âm với các nhóm chứa oxy và thể hiện khả năng hấp phụ mạnh mẽ, cũng như tốc độ hấp phụ nhanh đối với việc loại bỏ các phẩm nhuộm cation trong nước. Khả năng hấp phụ của phẩm nhuộm methylene blue (MB), phẩm nhuộm xanh lục cation turquoise blue GB (GB), phẩm nhuộm xanh malachite (MG), phẩm nhuộm tím tinh thể (CV) và phẩm nhuộm hồng cation FG (FG) lần lượt là 60.06 mg g− 1, 70.97 mg g− 1, 66.84 mg g− 1, 66.01 mg g− 1 và 50.27 mg g− 1. Cơ chế hấp phụ đã được đề xuất thông qua phân tích các isotherm hấp phụ và động học hấp phụ của các phẩm nhuộm cation trên Fe3O4/PCC MNPs. Hơn nữa, các phẩm nhuộm cation hấp phụ trên MNPs cũng đã được khảo sát theo thời gian tiếp xúc, giá trị pH, nhiệt độ, các ion cation đồng tồn tại và độ mạnh ion. Các kết quả này đã gợi ý rằng Fe3O4/PCC MNPs có tiềm năng được sử dụng như một chất hấp phụ từ tính cho sự hấp phụ chọn lọc các phẩm nhuộm cation trong xử lý nước thải.
Từ khóa
#hạt nano từ Fe3O4 #nano hấp phụ #phẩm nhuộm cation #xử lý nước thải #hấp phụ chọn lọcTài liệu tham khảo
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