Adsorption of Congo Red Dye from Aqueous Solutions by Montmorillonite as a Low-cost Adsorbent

Khaniabadi, Yusef Omidi; Basiri, Hassan; Nourmoradi, Heshmatollah; Mohammadi, Mohammad Javad; Yari, Ahmad Reza; Sadeghi, Shahram; Amrane, Abdeltif

doi:10.1515/ijcre-2016-0203

Cited by 25 publications

(11 citation statements)

References 49 publications

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“…Anionic dyes (i.e., congo red, CR) and cationic dyes (i.e., methylene blue, MB) are the most frequent synthetic dyes found in dye-contaminated water 2,3 . Earlier studies have reported the adverse effect of these dyes for environment and human health, where extended contact may trigger kidney disease, cancer and allergies 4,5 . Due to the severity of dye contamination, several removal methods, such as electrolysis, membrane filtration, photo-assisted degradation, and adsorption, have been developed [6][7][8] .…”

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confidence: 99%

Aqueous synthesis of highly adsorptive copper–gallic acid metal–organic framework

Azhar

Angkawijaya

Santoso

et al. 2020

Sci Rep

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A greener route to synthesize mesoporous copper–gallic acid metal–organic framework (CuGA MOF) than the conventional method using harmful DMF solvent was proposed in this study. Various synthesis attempts were conducted by modifying the synthesis conditions to produce CuGA MOF with comparable physical properties to a reference material (DMF-synthesized CuGA NMOF). The independent variables investigated include the molar ratio of NaOH to GA (1.1 to 4.4) and the synthesis temperature (30, 60, 90 °C). It was found that proper NaOH addition was crucial for suppressing the generation of copper oxide while maximizing the formation of CuGA MOF. On the other hand, the reaction temperature mainly affected the stability and adsorption potential of CuGA MOF. Reacting Cu, GA, and NaOH at a molar ratio of 1:1:2.2 and a temperature of 90 °C, produced mesoporous MOF (CuGA 90–2.2) with a surface area of 198.22 m2/g, a pore diameter of 8.6 nm, and a thermal stability of 219 °C. This MOF exhibited an excellent adsorption capacity for the removal of methylene blue (124.64 mg/g) and congo red (344.54 mg/g). The potential usage of CuGA 90–2.2 as a reusable adsorbent was demonstrated by its high adsorption efficiency (> 90%) after 5 adsorption–desorption cycles.

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confidence: 99%

Aqueous synthesis of highly adsorptive copper–gallic acid metal–organic framework

Azhar

Angkawijaya

Santoso

et al. 2020

Sci Rep

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“…However, adsorption method has proven to be a promising method due to its efficiency, relatively low cost, reusability, and easy operation [9,18]. Congo red adsorption has been reported with adsorbents such as activated carbon with a removal efficiency of about 100% [19], activated carbon prepared from Aloe Vera leaves with a performance of almost 100% [20], jujuba seeds with a dye removal of 88% [21], roots of Eichhornia crassipes with 96% [22], and montmorillonite clay with 85% [23]. The use of solid waste as an adsorbent material has been extensively studied, however, such hazardous waste materials as leather have rarely been applied to this purpose.…”

Section: Adsorbentsmentioning

confidence: 99%

Functionalized Leather: A Novel and Effective Hazardous Solid Waste Adsorbent for the Removal of the Diazo Dye Congo Red from Aqueous Solution

Clavijo

Osma

2019

Water

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The leather industry produces a high yield of solid hazardous wastes that generate a major impact on the environment. At the same time, the use of dyes by different manufacturing industries, including the footwear industry, creates large amounts of colored wastewater that is hard to treat. In this paper, potential adsorbents based on the functionalization of solid waste from leather in the removal of anionic dye Congo Red were studied. Twelve different functionalized adsorbents were analyzed in terms of dye removal. From those, the best adsorbents were characterized and tested to determine their life cycle, pH dependency and the resulting phytotoxicity of the treated dye baths. Different kinetic models were evaluated to describe this adsorption process. It was found that functionalized leather adsorbents presented multi-linearity behavior when removing Congo Red. Life cycle analysis showed that the adsorbents presented a high yield of absorption until the third cycle of operation, while phytotoxicity tested showed reductions up to 50% in the toxicity of the treated dye baths.

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“…Therefore, it is highly important to remove azo dyes from wastewater effluents before discharge into water bodies. Today, the use of adsorbents has increased for removing dyes from the wastewater [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of modified boehmite nanoplatelets and nanowires for dye removal from aqueous solution

Kamari¹,

Shafiee²,

Salimi³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tIn this study, boehmite (-AlOOH) nanoplatelets and nanowires were synthesized at a pH of 5 and 12, respectively, modified with sulfonic acid (-AlOOH-SA5), (-AlOOH-SA12), and were used to adsorb eriochrome black T (EbT) dye solutions. Transmission electron microscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy and X-ray diffraction were used to characterize the prepared nanoplatelets and nano wires. The effect of many parameters including initial concentration, pH and contact time was investigated. Values of 212.76 and 116.28 mg g -1 were, respectively, obtained for AlOOH-SA5 and AlOOH-SA12 for the adsorption maximum of EbT. Compared between two structures, the results indicated that the optimum conditions for 100 mg L -1 EbT solution were pH of 3 and 0.5 g L -1 AlOOH-SA5 as well as pH of 3 and 1 g L -1 AlOOH-SA12. Results of adsorption isotherms and adsorption kinetics indicated which they better matched by the Langmuir isotherm and also the adsorption kinetics better described by the pseudo-second-order model. Thermodynamic parameters have been measured, and results indicate that the adsorption process was spontaneous and exothermic for AlOOH-SA12 and nonspontaneous and endothermic for AlOOH-SA5. Finally, AlOOH-SA5 is a suitable adsorbent than that of AlOOH-SA12 and can be used for dye removal in wastewater treatment processes.

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Adsorption of Congo Red Dye from Aqueous Solutions by Montmorillonite as a Low-cost Adsorbent

Cited by 25 publications

References 49 publications

Aqueous synthesis of highly adsorptive copper–gallic acid metal–organic framework

Aqueous synthesis of highly adsorptive copper–gallic acid metal–organic framework

Functionalized Leather: A Novel and Effective Hazardous Solid Waste Adsorbent for the Removal of the Diazo Dye Congo Red from Aqueous Solution

Comparison of modified boehmite nanoplatelets and nanowires for dye removal from aqueous solution

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