Động học hấp phụ phốt-phát trên vật liệu hydroxit lớp kép (hạt Mg-Al LDH-polyvinyl ancol/alginat)

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

  • Nguyễn Thị Kim Phượng
  • Nguyễn Thị Minh Trang
  • Hồ Nguyễn Nhật Hà
  • Văn Việt
  • Nguyễn Thị Thanh Hà
  • Lê Phú Đông
  • Nguyễn Thị Phương Diệu

DOI:

https://doi.org/10.15625/0866-7144.2014-0003

Keywords:

Mg-Al LDH-PVA/Alginate beads, phosphate, adsorption.

Abstract

The Mg-Al LDH-PVA/Alginate beads was formed 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-PVA/Alginate beads was heterogenerous topography with interminglement of Mg-L LDHs powders and PVA/Alginate polymers. The optimum LDHs content in beads was 8 % (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 % 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-Al LDH-PVA/Alginate beads have high potential for phosphate removal as adsorption media.

Keywords: Mg-Al LDH-PVA/Alginate beads, phosphate, adsorption.

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Published

10-09-2014

How to Cite

Kim Phượng, N. T., Minh Trang, N. T., Nhật Hà, H. N., Việt, V., Thanh Hà, N. T., Đông, L. P., & Phương Diệu, N. T. (2014). Động học hấp phụ phốt-phát trên vật liệu hydroxit lớp kép (hạt Mg-Al LDH-polyvinyl ancol/alginat). Vietnam Journal of Chemistry, 52(4), 410. https://doi.org/10.15625/0866-7144.2014-0003

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