Enhancement of Congo red dye removal efficiency using Mg-Fe-layered double hydroxide

被引：12

作者：

Tabti, Hadja Alia ^{[1
]}

Medjahed, Baghdad ^{[2
]}

Boudinar, Mohamed ^{[3
]}

Kadeche, Abdelkader ^{[1
]}

Bouchikhi, Noria ^{[1
]}

Ramdani, Amina ^{[4
,5
]}

Taleb, Safia ^{[4
]}

Adjdir, Mehdi ^{[6
,7
]}

机构：

[1] Univ Dr Moulay Tahar, Lab Physicochem Studies, Saida 20000, Algeria

[2] Univ Tlemcen, Fac Sci, Dept Chem, Lab Separat & Purifcat Technol, Tilimsen, Algeria

[3] Univ Sci & Technol Mohamed BOUDIAF Oran USTO MB, Fac Sci, Dept Ind Organ Chem, Lab Sci Technol & Proc Engn, BP 1505 EL Mnaour, Oran 31000, Algeria

[4] Djillali Liabess Univ, Fac Sci, Lab Mat & Catalysis, Site 1 BP 89, Sidi Bel Abbes 22000, Algeria

[5] Univ Dr Moulay Tahar, Fac Sci, Dept Chem, Saida 20000, Algeria

[6] Univ Oran1 Ahmed Ben Bella, Fac Exact & Appl Sci, Lab Appl Organ Synth, BP 1524 El MNaouer, Oran 31000, Algeria

[7] Univ Saida Dr Moulay Tahar, Fac Technol, Dept Engn Proc, Saida, Algeria

来源：

RESEARCH ON CHEMICAL INTERMEDIATES | 2022年 / 48卷 / 06期

关键词：

LDHs; XRD; Adsorption; Congo red; Dyes; HYDROTALCITE CONVERSION COATINGS; AQUEOUS-SOLUTION; HIERARCHICAL STRUCTURES; ADSORPTION PERFORMANCE; SURFACE MODIFICATION; WATER-TREATMENT; CATIONIC DYES; WASTEWATERS; ELIMINATION; ADSORBENT;

D O I：

10.1007/s11164-022-04722-9

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this study, Mg-Fe(II)-Al-layered double hydroxide with different molar ratios Fe/Al (Mg-0.80-Fe-0.14-Al-0.06-LDHs and Mg-0.80-Fe-0.20-Al-0.00-LDHs) was prepared via a co-precipitation method at pH constant of 9.5 for a potential application as an efficient Congo red dye removal. The products are characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Brunauer-Emmet-Teller, and X-ray photoelectron spectroscopy. The X-ray diffraction patterns showed that both Mg-Fe-Al-LDHs synthesized with two molar ratios Fe/Al were successfully synthesized without significant impurities. The surface area of Fe-LDHs was about 98 m(2)/g. The prepared Mg-0.80-Fe-0.14-Al-0.06-LDHs was utilized for the removal of Congo red (CR) dye. Different parameters such as composite dosage, solution pH, contact time, and initial dye concentration were used to evaluate the adsorption process of CR dye. The results indicated that the optimal dose and contact time were 0.05 g and 5 min, respectively. The CR dye adsorption capacity increased with the increase of initial pH from 5 to 7. The isotherm and kinetics models of adsorption were studied. The adsorption kinetic fits the pseudo-second-order kinetic model with a high degree of correlation coefficient. The adsorption isotherm describes an appropriate fit to the Langmuir model with a maximum adsorption q(m) around 11 mg/g. The mechanism interaction study of CR dye molecule on Fe-LDHs was discussed, and it can be attributed to the existence of different forces as hydrogen bonding and electrostatic attraction.

引用

页码：2683 / 2703

页数：21

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