Động học hấp phụ phốt phát trên vật liệu hydroxit lớp kép ( hạt mg-al ldh-polyvinyl ancol/alginat)

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Tác giả: Nguyễn Nhật Hà Hồ, Phú Đông Lê, Thị Kim Phượng Nguyễn, Thị Minh Trang Nguyễn, Thị Phương Diệu Nguyễn, Thị Thanh Hà Nguyễn, Việt Văn

Ngôn ngữ: vie

Ký hiệu phân loại: 553.64 Nitrates and phosphates

Thông tin xuất bản: Hóa học, 2014

Mô tả vật lý: 410-415

Bộ sưu tập: Metadata

ID: 564179

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The Mg-Al LDH-PVA/Alginate beads was fonned by entrappment of Mg - Al layered double hydroxide powdered into polyvinyl alcohol and calcium alginates for phosphate removal from aquoeus solution. A Scanning Electron Microscope (SEM) and an X-Ray Diffractometer (XRD) were used to analyse the properties of Mg-Al LDH PVA/Alginate beads. SEM images showed that the surface of Mg-Al LDH-PVAI Alginate beads was heterogenerous topography with intenninglement of Mg-L LDHs powders and PV A/Alginate polymers. The optimum LDHs content in beads was 8 percent (mass/volume)
pH of solution did not effect to the phosphate removal. The kinetic reaction reached equilibrium around 8 hours of reaction time with 96.05 and 92.32 percent phosphate removal at 10 and 25 mgP/L, respectively. The adsorption kinetic study showed that adsorpion process followed pseudo-second order kinetic. This study approved that Mg-AI LDH-PVA/Alginate beads have high potential for phosphate removal as adsorption media.

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