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Động học hấp phụ asen trong nước bởi cột phản ứng chứa hạt hydroxit lớp đôi

Hồ Nguyễn Nhật Hà, Nguyễn Thị Mai Thơ, Nguyễn Thị Phương Diệu, Nguyễn Thị Kim Phượng

Abstract


The LDHs-polymer beads (MgAl-polymer beads or MgFe-polymer beads) were generated by impregnating synthetic LDHs (MgAl or MgFe) into polymer (alginate/polyvinyl alcohol-glutaraldehyde gel bead). A Scanning Electron Microscope (SEM) and an X-Ray Diffractometer (XRD) were used to analyze the properties of LDHs-polymer beads. SEM images showed that the surface of LDHs-polymer beads was heterogenerous demonstrating that of the LDHs powders were intermingled with polymer. The adsorption of arsenic onto the LDHs-polymer beads was investigated by performing column experiment. Maximum removal capacity (50-60 %) was found at 0.24 L.h-1 flow rate, 25 cm LDHs-polymer beads height and 300-500 µg.L-1 influent As concentration. The experimental data were well fitted with the Thomas model. This study approved that LDHs-polymer beads have high potential for arsenic removal as adsorptive media.

Keywords. LDHs-polymer beads, column experiment, arsenic.

Keywords


LDHs-polymer beads, column experiment, arsenic.

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