Effect of molar ratio (M²⁺/M³⁺) of Mg-Al-NO₃-layered double hydroxide on dye adsorption / Asiah Mohd. Shafiee

Mohd. Shafiee, Asiah (2010) Effect of molar ratio (M²⁺/M³⁺) of Mg-Al-NO₃-layered double hydroxide on dye adsorption / Asiah Mohd. Shafiee. Student Project. Faculty of Applied Sciences, Shah Alam. (Unpublished)

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Abstract

Layered double hydroxide (LDH) is lamellar mixed hydroxide containing positively charged main layers and undergoing anion exchange chemistry. In this study, MgAl layered hydroxides (LDHs) have been prepared with NO₃⁻ interlayer anions and with Mg/Al ratio 2, 3 and 4. The LDHs were characterized by X-Ray Diffractometer (X-RD), Fourier Transform Infrared (FT-IR) and Field Emission Scanning Electron Microscopy (FESEM). The X-RD patterns for the LDHs show intense and sharp peaks of d-spacing at about 8.00 Å - 8.90 Å and interlayer spacing peaks approximately 4.00 Å - 4.50 Å. After adsorption, the basal spacing of the LDHs decreases due to the small molecular size of anionic dyes and mostly, the adsorption occurs on the external surface of the LDHs. The FT-IR spectrum of the LDHs were identified and the adsorption has occurred onto the LDHs as the functional groups of dyes appear in the FT-IR spectrum. While, from the FESEM analysis, it shows that the LDHs has well-defined plate-shaped crystals. Moreover, the different ratio of LDHs were investigated by comparing their adsoption efficiency on different type of dyes which are Reactive Red 120 (RR120), Reactive Orange 16 (R016) and Reactive Black 5 (RB5). And, the results obtained shows that LDH of ratio 4 has the best adsorption efficieny, followed by LDH of ratio 3 and then ratio 2.

Item Type: Monograph (Student Project)
Creators:
CreatorsEmail
Mohd. Shafiee, AsiahUNSPECIFIED
Subjects: T Technology > TP Chemical technology > Textile bleaching, dyeing, printing, etc.
T Technology > TP Chemical technology > Textile bleaching, dyeing, printing, etc. > Dyeing
T Technology > TP Chemical technology > Textile bleaching, dyeing, printing, etc. > Dyes
Divisions: Faculty of Applied Sciences
Item ID: 23137
Uncontrolled Keywords: Layered double hydroxide; dye adsorption
Last Modified: 25 Feb 2019 06:42
Depositing User: Staf Pendigitalan 7
URI: http://ir.uitm.edu.my/id/eprint/23137

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