Evaluation of Mg/Al Layered Double Hydroxides as Adsorbent Material for
Adsorptive Removal of Congo Red (Acid Red 28) Azodye from Aqueous Solution

The use of inorganic layer compounds as adsorbents for organic dyes in water treatment is of increasing interest. In this study, an attempt is made for the synthesis of Mg/Al LDHs by the hydrothermal method. The synthesis temperature was found to significantly affect to the structure of layered double hydroxides (LDHs), as pointed out by FT-IR analysis. In addition, an adsorption capacity of the synthesized LDHs against Congo red in aqueous solutions was investigated and also compared the adsorption results with other dyes such as methylene blue and methyl orange.

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Congo red and direct yellow dye removal from aqueous solution by Zn/Cr layered double hydroxides

10.1063/1.5064983 ◽

2018 ◽

Cited By ~ 3

Author(s):

Bakri Rio Rahayu ◽

Tarmizi Taher ◽

Poedji Loekitowati Hariani ◽

Aldes Lesbani

Keyword(s):

Aqueous Solution ◽

Layered Double Hydroxides ◽

Congo Red ◽

Dye Removal ◽

Double Hydroxides

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Synthesis of Zn/Al layered double hydroxides as adsorbent for congo red and direct violet removal from aqueous solution

10.1063/1.5065003 ◽

2018 ◽

Cited By ~ 2

Author(s):

Yosi Saria ◽

Tarmizi Taher ◽

Poedji Loekitowati Hariani ◽

Aldes Lesbani

Keyword(s):

Aqueous Solution ◽

Layered Double Hydroxides ◽

Congo Red ◽

Double Hydroxides

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A Comparative Study on The Adsorption Behavior of Congo Red on to ZnAl and ZnCr Layered Double Hydroxides

The Journal of Pure and Applied Chemistry Research ◽

10.21776/ub.jpacr.2020.009.02.519 ◽

2020 ◽

Vol 9 (2) ◽

pp. 108-116

Author(s):

Tarmizi Taher ◽

◽

Nyanyu Ummu Hani ◽

Neza Rahayu Palapa ◽

Risfidian Mohadi ◽

...

Keyword(s):

Experimental Data ◽

Surface Area ◽

Adsorption Kinetics ◽

Layered Double Hydroxides ◽

Congo Red ◽

Adsorption Process ◽

Bet Surface Area ◽

Pseudo Second Order ◽

Ft Ir ◽

Double Hydroxides

In this work, two synthetic layered double hydroxides (LDH) consists of Zn2+ as M2+ cation with different M3+ cation, i.e., Al3+ and Cr3+ were used as an adsorbent for Congo Red removal aqueous solution. Both Zn-Al and Zn-Cr LDH were characterized by X-ray diffraction, FT-IR, and BET surface area analyzer. The effect of contact time, initial dye concentration, and temperature were evaluated in a batch technique in order to investigate the characteristic of Congo Red adsorption onto both adsorbents. The experimental data were assessed according to the parameter of adsorption kinetics, isotherm, and thermodynamics. The results of LDH characterization showed that Zn-Al LDH has a higher interlayer distance than Zn-Cr LDH, although Zn-Cr LDH has a higher surface area. The FT-IR analysis indicated the interlayer space of both Zn-Cr and Zn-Al LDH was dominated by CO32- as the interlayer anion species. The adsorption kinetics study of Congo Red on both LDH revealed that the adsorption process followed the pseudo-second-order model. For the adsorption isotherm, the experimental data fit well with the Freundlich model rather than the Langmuir model. The thermodynamic study indicated that the adsorption process that occurred on both adsorbents was spontaneous with exothermic nature.

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