Tổng hợp carbon aerogel hoạt hóa bằng KOH để loại bỏ thuốc nhuộm Crystal violet hiệu quả ra khỏi nước
198 lượt xemDOI:
https://doi.org/10.54939/1859-1043.j.mst.VITTEP.2022.51-61Từ khóa:
Activated carbon aerogel; Hiệu quả; Crystal violet.Tóm tắt
Trong nghiên cứu này, một sản phẩm carbon aerogel hoạt hóa bằng KOH (AJCA) từ mít được điều chế bằng quá trình xử lý thủy nhiệt lõi của mít với tốc độ gia nhiệt khác nhau. AJCA được tổng hợp để hấp thụ thuốc nhuộm màu tím pha lê Crystal violet (CV) từ dung dịch nước và xử lý hiệu quả các loại thuốc nhuộm khác. Kính hiển vi điện tử quét (SEM) và quang phổ tia X phân tán năng lượng (EDS) cho thấy bề mặt mẫu có nhiều rãnh có độ sâu khác nhau và nhiều lớp vảy xếp chồng lên nhau.. Diện tích bề mặt riêng được kiểm tra bằng phương pháp The Brunauer-Emmett-Teller (BET), đạt 592,65 m2/g. Tốc độ gia nhiệt phù hợp nhất là 3 độ mỗi phút (AJCA-3). Khả năng hấp phụ tối đa là 386,66 mg/g và hiệu suất hấp thụ đạt 96,5% ở nồng độ 300 ppm, điều này cho thấy AJCA-3 rất hiệu quả và có khả năng cạnh tranh với một số chất hấp phụ. Mô hình bậc hai giả mô tả thỏa đáng động học hấp phụ, và mô hình Langmuir thích hợp để biểu diễn cân bằng hấp phụ. Những thí nghiệm này cho thấy rằng AJCA có tiềm năng tuyệt vời trong việc xử lý các chất sinh màu thực.
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