Highly efficient removal of basic blue 41 with nanoporous silica

Zarezadeh-Mehrizi, Mansoureh; Badiei, Alireza

doi:10.1016/j.wri.2014.04.002

Cited by 66 publications

(21 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most conventional adsorption systems use activated carbon despite its high production costs and regeneration difficulty [14]. Recently, many low-cost adsorbents have been investigated in the removal of dyes such as agricultural wastes [15], clays [16], chitosan [17], silica [18], kaolinite [19], perlite [20], sepiolite [21], montmorillonite [22] and some natural biosorbents [23]. However, these materials generally have low adsorption capacities, and hence, a large adsorbent dosage is required to achieve a low dye concentration in the treated effluents.…”

Section: Introductionmentioning

confidence: 99%

Zn–Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions: Synthesis, characterisation and dye removal properties

Mahjoubi¹,

Khalidi

Abdennouri³

et al. 2017

Journal of Taibah University for Science

207

109

View full text Add to dashboard Cite

In this work, Zn-Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions were synthesised via a co-precipitation method at a constant solution pH. The as-synthesised samples were characterised by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and simultaneous thermogravimetric/differential thermal analysis (TGA-DTA). The XRD patterns showed that Zn-Al-SO 4 had the greatest interlayer spacing, followed by Zn-Al-Cl, Zn-Al-NO 3 and Zn-Al-CO 3 . The FTIR spectra clearly confirmed the presence of intercalated anions in the structure of the LDHs. Batch experiments for methyl orange (MO) adsorption onto synthesised samples were investigated under various conditions such as contact time, initial dye concentration and solution pH. The experimental results show that pH is the most influencing factor. The effective pH range for the MO removal was found to be 3.5-4.5. The kinetics data can be described accurately by a pseudo-second-order kinetic model instead of a pseudo-first-order model. The equilibrium data were analysed using the Langmuir, Freundlich and Dubinin-Radushkevich models. The results showed that the Langmuir and Dubinin-Radushkevich isotherm models fit well to the experimental data. The Zn-Al-LDH samples exhibited exceptional Langmuir maximum adsorption capacities of 2758, 2455, 2270 and 1684 mg/g for Zn-Al-SO 4 , Zn-Al-Cl, Zn-Al-NO 3 and Zn-Al-CO 3 , respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

Zn–Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions: Synthesis, characterisation and dye removal properties

Mahjoubi¹,

Khalidi

Abdennouri³

et al. 2017

Journal of Taibah University for Science

207

109

View full text Add to dashboard Cite

show abstract

“…Activated carbon is regarded as an effective but expensive adsorbent due to its high costs of manufacturing and regeneration [3]. In addition to activated carbon, some adsorbents including agricultural wastes [4,5], lignite [6], natural phosphate [7], chitosan [8], silica [9], kaolinite [10], hydroxyapatite [11,12], perlite [13], sepiolite [14], montmorillonite [15] and some natural biosorbents have also been reported [16,17]. However, studies in this field have not produced materials which meet all demands of adsorption activity.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics

Elmoubarki

Mahjoubi

Tounsadi

et al. 2015

Water Resources and Industry

286

104

View full text Add to dashboard Cite

a b s t r a c tInexpensive and easily available Moroccan natural clays were investigated for the removal availability of textile dyes from aqueous solution. For this purpose, the adsorption of methylene blue (MB) as reference molecule, malachite green (MG) representative of cationic dyes and methyl orange (MO) representative of anionic dyes, was studied in batch mode under various parameters. The clays were characterized by means of XRD, cationic exchange capacity and BET surface area analysis. The experimental results show that, the adsorption was pH dependent with a high adsorption capacity of MB and MG in basic range and high adsorption of MO in acidic range. The pseudo-second-order kinetic model provided the best fit to the experimental data for the adsorption of MB and MG by the clays. However, the adsorption of MO was more suitable to be controlled by an intra-particle diffusion mechanism. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. The adsorption process was found to be exothermic in nature in the case of MB and MO. However, the adsorption of MG was endothermic. (N. Barka). Water Resources and Industry ] (]]]]) ]]]-]]] Please cite this article as: R. Elmoubarki, et al., Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics, Water Resources and Industry (2014), http://dx.

show abstract

“…In comparison with the adsorption capacities of other adsorbents for BB41 (Table 4), the adsorption capacity of MW-g-C was found to be better than the most other adsorbents reported in the literature [36][37][38][39] . The higher capacity of MW-g-C is due to the high specific surface area and many pores on adsorbent for dye removal from solution.…”

Section: Isotherm Studiesmentioning

confidence: 73%

Preparation of A MWCNT-Graphite Composite Based on Sol Gel Method for Dye Removal

Shirgholami¹,

Mirjalili²,

Nasirizadeh³

2017

Orient. J. Chem

View full text Add to dashboard Cite

Carbon based composites have good capability for elimination of colored pollutants. In this work, a multi-walled carbon nanotube-graphite Composite (MW-g-C) was prepared using a sol gel method. The N 2 adsorption/desorption curves, scanning electron microscopy and zeta potential were used for characterization of MW-g-C. The adsorption characteristics of MW-g-C were studied using Basic Blue 41 (BB41) dye as an adsorbate. The effects of several influential parameters such as contact time, pH, adsorbent dose and initial concentration on the adsorption were well investigated and optimized. The maximum amount of dye adsorbed in optimal conditions (include pH= 6.8, amount of MW-g-C= 1.37 g L -1) was 115 mg g -1 . The linear correlation coefficients and the standard deviations of Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Temkin isotherms were determined. The results also showed that the adsorption kinetics was controlled by a pseudo second-order model for adsorption of dye onto MW-g-C. The ∆G°, ∆H° and E a values indicated that the adsorption of BB41 onto MW-g-C was physisorption.

show abstract

Highly efficient removal of basic blue 41 with nanoporous silica

Cited by 66 publications

References 36 publications

Zn–Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions: Synthesis, characterisation and dye removal properties

Zn–Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions: Synthesis, characterisation and dye removal properties

Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics

Preparation of A MWCNT-Graphite Composite Based on Sol Gel Method for Dye Removal

Contact Info

Product

Resources

About