Fast microwave-assisted green synthesis of xanthan gum grafted acrylic acid for enhanced methylene blue dye removal from aqueous solution

Makhado, Edwin; Pandey, Sadanand; Nomngongo, Philiswa N.; Ramontja, James

doi:10.1016/j.carbpol.2017.08.093

Cited by 105 publications

(27 citation statements)

References 60 publications

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“…Effect of initial dye concentration relies on the immediate relation between the active binding sites on the adsorbent surface and dye concentration. An increase in the initial concentration of dye will improve the efficiency of dye removal according to the increased interaction of dye and absorbent surface [21][22][23]. In this study, the effect of initial concentration of dye on adsorption capacity of methylene blue dye onto MWCNT-COOH-cellulose (A1), MWCNT-COOH-cellulose with MgO directly (A2), and MWCNT-COOH-cellulose with MgO indirectly (A3) surfaces as adsorbents was investigated.…”

Section: Effect Of Initial Dye Concentrationmentioning

confidence: 99%

“…For several dyes and absorbents, adsorption process can be endothermic or exothermic in nature. If dye removal efficiency increases with increasing the solution temperature it can be concluded that the dye adsorption process on adsorbent surface is endothermic; on the other hand, if with increasing the solution temperature the efficiency of dye removal decreases, dye adsorption process will be exothermic in nature [22,23]. The relationship between the temperature and the removal of methylene blue dye by MWCNT-COOH-cellulose (A1), MWCNT-COOH-cellulose with MgO directly (A2), and MWCNT-COOH-cellulose with MgO indirectly (A3) as nanocomposite adsorbents was investigated These images are taken in three different zones at different temperatures from 288 K to 308 K, respectively.…”

Section: Effect Of Temperaturementioning

confidence: 99%

“…It means that the adsorption of methylene blue dye onto nanocomposite surfaces is an exothermic process. Entropy (∆S°), the adsorption free energy (∆G°), and standard enthalpy (∆H o ) for methylene blue dye adsorption onto MWCNT-COOH-cellulose (A1), MWCNT-COOH-cellulose with MgO directly (A2), and MWCNT-COOH-cellulose with MgO indirectly (A3) surfaces were calculated to evaluate the MB dye removal thermodynamic feasibility using the adsorbents in this study [22][23][24][25][26]:…”

Section: Adsorption Thermodynamicmentioning

confidence: 99%

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Preparation and characterization of MWCNT–COOH–cellulose–MgO NP nanocomposite as adsorbent for removal of methylene blue from aqueous solutions: isotherm, thermodynamic and kinetic studies

2018

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In this work, MWCNT-COOH-cellulose nanocomposite was prepared with MWCNT-COOH, SOCl2 as leaving group and cellulose as an adsorbent (A1); MgO nanoparticles have been successfully coated on the surface of nanocomposite by directly adding to A1 (MWCNT-COOH-cellulose-MgO; A2), magnesium nitrate was added to A1 and MgO nanoparticles were achieved by coating indirectly on the surfaces (MWCNT-COOH-cellulose-MgO; A3). These nanocomposites (A1, A2, and A3) were used for the removal of methyleneblue (MB) dye from aqueous solution. For characterization of adsorbent surfaces, the FT-IR, TEM, SEM, and XRD analysis were used. The effects of initial concentration of MB dye, contact time, and temperature on the adsorption were studied. According to the results, 55 min was selected as the optimum contact time for the removal process. The equilibrium data of adsorption were well fitted and the Langmuir (type III) model had the best agreement because it possesses high value of linear regression, high value R 2 , and least value of average relative error, ARE (%). Parameters of thermodynamics including enthalpy (∆H°), entropy (∆S°), and Gibbs energy (∆G°) were calculated. Kinetic data had best agreement with pseudo-second-order model. Graphical abstract Schematic synthesis of MWCNT-COOH-cellulose-MgO NP nanocomposite as adsorbent

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Section: Effect Of Initial Dye Concentrationmentioning

confidence: 99%

Section: Effect Of Temperaturementioning

confidence: 99%

Section: Adsorption Thermodynamicmentioning

confidence: 99%

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Preparation and characterization of MWCNT–COOH–cellulose–MgO NP nanocomposite as adsorbent for removal of methylene blue from aqueous solutions: isotherm, thermodynamic and kinetic studies

2018

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“…Moreover, most of the azo dyes are known to cause carcinogenicity and allergic reactions to humans and wild life if enter into the food chain via water supply system . In recent past, various materials, namely, bioadsorbents, bentonite‐based adsorbents, chitosan‐activated carbon, biochar, zeolite, goethite, xanthan gum, and adsorbents developed from industrial by‐products like fly ash, sludge, and red mud have been employed for the removal of color from effluent. Presently, the application of nanoscale materials for the treatment of dye‐loaded water is getting considerable recognition from researchers due to their exclusive size‐dependent assets like large surface area, short intraparticle diffusion distance, high reactivity, efficient reusability, and exceptional tunability for specific purposes .…”

Section: Introductionmentioning

confidence: 99%

Biogenic fabrication of iron nanoadsorbents from mixed waste biomass for aqueous phase removal of alizarin red S and tartrazine: Kinetics, isotherm, and thermodynamic investigation

Gautam

Shivapriya

Banerjee

et al. 2019

Env Prog and Sustain Energy

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Present work deals with the facile and ecologically viable production of iron nanoadsorbents by utilizing different waste plant biomass, orange peel, flower waste, and environmentally harmful Alligator weed. The as‐prepared nanoadsorbents were applied for the aqueous phase minimization of toxic dyes, alizarin red S and tartrazine. Different techniques, namely, X‐ray diffraction, Fourier transform infra‐red spectroscopy, scanning electron microscopy, dynamic light scattering and magnetic properties measurement system, were applied to characterize the synthesized material. Impact of various experimental conditions like pH, adsorbent dose, contact time, and temperature on removal trend was examined. The acidic medium positively favored the process of sorption. Kinetic analysis revealed that the adsorption of both the dyes followed pseudo‐second‐order kinetic model. Equilibrium sorption data were fitted better to Freundlich model as compared with Langmuir model. The maximum adsorption capacities at 50°C were 42.58 and 68.78 mg g–1 for alizarin red S and tartrazine at pH 4.0 and 2.0, respectively. Thermodynamic parameters exhibited that the sorption of both the dyes onto nanoadsorbent was spontaneous and endothermic with increased randomness at the solid–liquid interface. Desorption experiment demonstrated that the regenerated adsorbent can be recycled efficiently up to three times. Overall, the prepared nanomaterials exhibit remarkable removal competency for both dyes tested like alizarin red S and tartrazine.

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“…A search is on more effective and economic treatment techniques. The adsorption process provides an attractive alternative treatment, especially if the adsorbent is inexpensive and readily available [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

mentioning

confidence: 99%

Efficient and Rapid Adsorption Characteristics of Templating Xanthan Gum-Graft-Poly (Aniline) and Silica Nanocomposite toward Removal of Toxic Methylene Blue Dyes

2017

Nov. 27-28, 2017 South Africa ASETWM-17, RCABES-17 &Amp; EBHSSS-17

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Abstract-Conductingpolymer composites with micro/nanostructures have attracted significant academic and technological attention because of their unique physical properties and potential applications in nanoelectronics, electromagnetics, and biomedical devices. This paper deals with application of sol-gel synthesis of xanthan gum-graft-poly (aniline)/silica (XG-g-PANi/SiO 2 ) hybrid nanocomposite toward the rapid removal of methylene blue dyes from aqueous solution. XG-g-PANi being act as a novel template for nanosilica formation. The detailed investigation of the adsorption isotherms of methylene blue dyes from aqueous solution showed that the dyes adsorb in accordance with a Langmuir adsorption isotherm. The results indicate that xanthan gum-graft-poly (aniline)/silica (XG-g-PANi/SiO 2 ) hybrid nanocomposite can be used as an effective adsorbent for removal of dyes from textile effluents.Highlights ► Xanthan gum-graft-poly (aniline)/silica hybrid nanocomposite -an eco-friendly polymer matrix for the treatment of dye effluents. ► The nanocomposite decolorized 99% of dye bath effluent. ► The removal of dyes is largely depending on the solution pH. ► The removal process followed Langmuir isotherm.

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Fast microwave-assisted green synthesis of xanthan gum grafted acrylic acid for enhanced methylene blue dye removal from aqueous solution

Cited by 105 publications

References 60 publications

Preparation and characterization of MWCNT–COOH–cellulose–MgO NP nanocomposite as adsorbent for removal of methylene blue from aqueous solutions: isotherm, thermodynamic and kinetic studies

Preparation and characterization of MWCNT–COOH–cellulose–MgO NP nanocomposite as adsorbent for removal of methylene blue from aqueous solutions: isotherm, thermodynamic and kinetic studies

Biogenic fabrication of iron nanoadsorbents from mixed waste biomass for aqueous phase removal of alizarin red S and tartrazine: Kinetics, isotherm, and thermodynamic investigation

Efficient and Rapid Adsorption Characteristics of Templating Xanthan Gum-Graft-Poly (Aniline) and Silica Nanocomposite toward Removal of Toxic Methylene Blue Dyes

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