Đặc trưng và khả năng hấp phụ nitrate của vật liệu Amine-SiO2

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Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Phát triển Khoa học & Công nghệ: Khoa học Tự nhiên, 2018

Mô tả vật lý: tr.171

Bộ sưu tập: Metadata

ID: 294262

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Amine-SiO2 material (basically on silicon dioxide) was synthesized by the grafting method with triamine silane to form activated amine groups on the surface of SiO2 support and was applied as a novel adsorbent for nitrate removal from aqueous solution. The characterizations of Amine-SiO2 were determined by using TGA, FTIR, BET, SEM. Nitrate adsorption capacity and durability of Amine-SiO2 were compared with the anion exchange resin (Akualite A420 commercial). The results showed that Amine-SiO2 had high nitrate adsorption capacity, ~ 1.14 fold higher than the Akualite A420 ion exchange resin, based on the adsorption efficiency. This might be due to a strong affinity for nitrate ions of the activated amine groups on the surface of SiO2 support. In addition, the experimental results also proved that Amine-SiO2 material had good durability (stable performance after 10 regeneration times).Vật liệu Amine-SiO2 trên cơ bản là silica được tổng hợp bằng phương pháp tẩm với hợp chất triamine silane để tạo các nhóm amine hoạt tính trên bề mặt chất mang SiO2 và được ứng dụng làm chất hấp phụ nitrate trong môi trường nước. Đặc trưng cơ bản của vật liệu Amine-SiO2 được xác định bằng các kỹ thuật như TGA, FTIR, BET, SEM. Khả năng hấp phụ ion nitrate và độ bền của vật liệu được so sánh với nhựa trao đổi anion thương mại (Akualite A420). Kết quả cho thấy vật liệu Amine-SiO2 có khả năng hấp phụ ion nitrate cao, gấp ~1,14 lần so với Akualite A420 tính theo hiệu quả hấp phụ. Điều này có thể là do ái lực mạnh đối với ion nitrate của các nhóm amine trên bề mặt chất mang SiO2. Ngoài ra, kết quả thực nghiệm đã chứng minh vật liệu AmineSiO2 có độ bền tốt (đạt hiệu suất ổn định sau 10 lần tái sinh).

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