Diphosphonium ion-exchanged montmorillonite for Telon dye removal from aqueous media

Makhoukhi, Benamar; Didi, Mohamed Amine; Moulessehoul, Hidayet; Azzouz, Abdelkrim; Villemin, Didier

doi:10.1016/j.clay.2010.08.026

Cited by 25 publications

(9 citation statements)

References 49 publications

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“…So, the removal of these dyes from natural water sources and industrial wastewater becomes a crucial issue. Various treatment technologies, such as electrochemistry [2], ion-exchange [3][4][5][6], membrane filtration [7][8][9], flocculation [10], photocatalytic degradation [11][12][13][14][15] and adsorption [16][17][18][19][20][21] have been used for dye-contaminated wastewater. Among them, adsorption is the most popular and effective due to its attractive advantages such as low cost, fast and strong operability.…”

Section: Introductionmentioning

confidence: 99%

Water–n-BuOH solvothermal synthesis of ZnAl–LDHs with different morphologies and its calcined product in efficient dyes removal

Huang

Sun

Zhao

et al. 2017

Journal of Colloid and Interface Science

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In this study, water-n-BuOH mixed solvents were used to synthesize the ZnAl-layered double hydroxides (ZnAl-LDHs) via hydrothermal method. The XRD, FT-IR, SEM, ICP and CHN analyses revealed that the type of intercalated anions, the layer Zn/Al ratios, and morphologies of the LDHs depended on the ratio of V(water)/V(n-BuOH) in the mixed solvents. When the ratio of V(water)/V(n-BuOH) is 3 or 0.3, the as-prepared LDHs had 3D "silk flowers" (ZnAl-LDH-3) or "Sedimentary rock" morphology (ZnAl-LDH-0.3). Adsorption properties of dyes on calcined LDHs were studied. Compared with ZnAl-LDO-0.3 and ZnAl-LDO-w (calcined from the LDHs obtained in pure water), ZnAl-LDO-3 showed much better adsorption efficiency for anionic dyes thanks to its much larger BET-specific surface area. The sorption kinetics for dyes was appropriately described by the pseudo-second-order model and sorption isotherms can be fitted more satisfactorily by the Langmuir model. With the increasing concentrations of dyes from 10mg/L to 400mg/L, the maximum absorption capacities of ZnAl-LDO-3 were 1540mg/g (2.21mmol/g) for congo red, 1153mg/g (3.52mmol/g) for methyl orange and 390mg/g (0.63mmol/g) for active red (X-3B), respectively. The adsorption dyes onto the external surface is still the main mechanism for LDO adsorbents. The ZnAl-LDO-3 was a potential adsorbent for dyeing wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Water–n-BuOH solvothermal synthesis of ZnAl–LDHs with different morphologies and its calcined product in efficient dyes removal

Huang

Sun

Zhao

et al. 2017

Journal of Colloid and Interface Science

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“…It has also been widely used as a disinfectant and fungicide in aquaculture due to low cost and high effectiveness 5 . In recent years, various treatment technologies have been developed for dye removal from industrial wastewaters which are classified as chemical (ozonation 8 , chemical oxidation 9 , electrochemical 10 , photocatalytic degradation 11 ), physical (adsorption 12 , coagulation/flocculation 13 , ion exchange 14 , membrane filtration 15 ) and biological 16 treatments. The variety of synthetic dyes has been observed in effluents of some industries such as coloring, textile and tanning.…”

Section: Introductionmentioning

confidence: 99%

Removal of crystal violet from aqueous solutions using functionalized cellulose microfibers: a beneficial use of cellulosic healthcare waste

2016

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In this research, preparation of functionalized cellulosic microfibers (FCMFs) was proposed as a beneficial use of cellulosic healthcare wastes for removal of crystal violet from aqueous solutions. The functionalization process was performed using sulfonation reaction by chlorosulfonic acid. The results of scanning electron microscopy revealed a significant deformation in fibrous structure of cellulose as a result of sulfonation process. The functionalization of cellulosic fibers was confirmed by investigation of FTIR spectra of cotton and FCMFs. The charge density of FCMFs was calculated from its sulfur content which was measured by CHNS elemental analyzer. The influence of factors affecting the adsorption process such as pH, salt content, contact time, initial dye concentration and temperature were examined. The adsorption capacity was increased by increasing the salt content and temperature. The equilibrium was achieved after 60 min of mixing. The equilibrium adsorption data were well described by Freundlich, Redlich-Peterson isotherms. The maximum adsorption capacity was found to be 872 mg g -1 . The adsorption kinetic data were well fitted to pseudo-second-order and Elovich kinetic models. Thermodynamic parameters indicated that the adsorption process was spontaneous and endothermic in nature. The residual root-mean-square error (RMSE), average absolute relative error (AARE), cross-correlation coefficient (CCC, R) and chi-square test (χ2) were used to evaluate the fitting of the adsorption isotherms and kinetic models to the experimental results. The saturated adsorbent was regenerated by acid washing (HCl, 1 mol L -1 ) and removal efficiency was decreased slightly in each batch adsorption/regeneration cycle.

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“…The natural bentonite used in this study was obtained from deposits in the area of Maghnia, Algeria. The chemical composition of bentonite, as determined by X-ray fluorescence (Philips PW 3710), was found to be as follows: 62.48% SiO 2 , 17.53% Al 2 O 3 , 1.23% Fe 2 O 3 , 3.59% MgO, 0.82% K 2 O, 0.87% CaO, 0.22% TiO 2 , 0.39% Na 2 O, 0.04% As, and 13.0% loss on ignition at 950 • C [16,17]. The mineralogical analysis showed that the native crude clay mineral predominantly contains montmorillonite (86 wt.%).…”

Section: Bentonite Samplementioning

confidence: 99%

“…The chemical composition of purified bentonite was found to be as follows: 64.7% SiO 2 , 18.1% Al 2 O 3 , 0.95% Fe 2 O 3 , 2.66% MgO, 0.8% K 2 O, 0.61% CaO, 0.2% TiO 2 , 1.43% Na 2 O, 0.05% As, and 10.0% loss on ignition [16][17][18][19].…”

Section: Bentonite Samplementioning

confidence: 99%

Synthesis of bisimidazolium–ionic liquids: Characterization, thermal stability and application to bentonite intercalation

Makhoukhi

Villemin

Didi

2016

Journal of Taibah University for Science

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In this study, a convenient method was developed for the synthesis of bisimidazolium salts and bisimidazolium-ionic liquids. The products were characterized by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), mass spectroscopy, elemental analysis and thermogravimetric analyses (TGA). The effect of the counter ion, alkyl chain length and structural isomerism on the thermal stability of the bisimidazolium salts was investigated. Ionic liquid-treated bentonite clays were prepared by ion exchange of the bisimidazolium cations with Na-bentonite. These new organoclays were characterized by X-ray diffraction (XRD), FTIR and TGA. The results show that the ionic liquid-intercalated bentonites have greater thermal stability (450-470 • C) compared with the bisimidazolium-or the diphosphonium-exchanged bentonites.

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Diphosphonium ion-exchanged montmorillonite for Telon dye removal from aqueous media

Cited by 25 publications

References 49 publications

Water–n-BuOH solvothermal synthesis of ZnAl–LDHs with different morphologies and its calcined product in efficient dyes removal

Water–n-BuOH solvothermal synthesis of ZnAl–LDHs with different morphologies and its calcined product in efficient dyes removal

Removal of crystal violet from aqueous solutions using functionalized cellulose microfibers: a beneficial use of cellulosic healthcare waste

Synthesis of bisimidazolium–ionic liquids: Characterization, thermal stability and application to bentonite intercalation

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