Comparison of Jatropha curcas shells in natural form and treated by non-thermal plasma as biosorbents for removal of Reactive Red 120 textile dye from aqueous solution

Prola, Liziê Daniela Tentler; Acayanka, Elie; Lima, Éder C.; Umpierres, Cibele S.; Vaghetti, Júlio C.P.; Santos, Wmekson Oliveira; Laminsi, Samuel; Djifon, Peter T.

doi:10.1016/j.indcrop.2013.02.018

Cited by 155 publications

(85 citation statements)

References 64 publications

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“…For MWCNT and SWCNT, the electrostatic interaction occurs at pH < 6.85 and 6.73, respectively. However, when the pH value is much lower than pH pzc , the surface of the adsorbent becomes more positive 19 . This behaviour explains the high adsorption capacity of both adsorbents for RB-4 dye at pH 2.0.…”

Section: Effects Of Ph On Adsorptionmentioning

confidence: 99%

“…The spectra were obtained with a resolution of 1 cm -1 and scans were in the range of 100-4000 cm -1 . The point of zero charge (pH pzc ) of the adsorbent was determined according to a published procedure 19 .…”

Section: Adsorbentsmentioning

confidence: 99%

“…is the each q value measured experimentally, exp q is the average of experimentally measured q, n p is the number of experiments performed and p is the number of parameters of the fitting model 19 .…”

Section: Isotherm Model Equationmentioning

confidence: 99%

“…In this present work, the Langmuir, Freundlich and Liu isotherm models were tested 19 . The Langmuir isotherm model is based on the following principles 19 : adsorbates are chemically adsorbed at a fixed number of well-defined sites; each site can only take one adsorbate species; all sites are energetically similar; there are no interactions between the adsorbate species. The Freundlich isotherm model assumes that the concentration of the adsorbate on the adsorbent surface increases with the adsorbate concentration.…”

Section: Equilibrium Studiesmentioning

confidence: 99%

“…The Freundlich isotherm model assumes that the concentration of the adsorbate on the adsorbent surface increases with the adsorbate concentration. Theoretically, using this expression, an infinite amount of adsorption can occur 19 . The Liu isotherm model 19 is a combination of the Langmuir and Freundlich isotherm models; therefore, the monolayer assumption of Langmuir model is eliminated and the infinite adsorption assumption that originates from the Freundlich model is also overruled.…”

Section: Equilibrium Studiesmentioning

confidence: 99%

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Adsorption of a textile dye from aqueous solutions by carbon nanotubes

et al. 2013

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Multi-walled and single-walled carbon nanotubes were used as adsorbents for the removal of Reactive Blue 4 textile dye from aqueous solutions. The adsorbents were characterised using Raman spectroscopy, N 2 adsorption/desorption isotherms and scanning and transmission electron microscopy. The effects of pH, agitation time and temperature on adsorption capacity were studied. In the acidic pH region, the adsorption of the dye was favourable using both adsorbents. The contact time to obtain equilibrium isotherms at 298-323 K was fixed at 4 hours for both adsorbents. For Reactive Blue 4 dye, Liu isotherm model gave the best fit for the equilibrium data. The maximum sorption capacity for adsorption of the dye occurred at 323 K, attaining values of 502.5 and 567.7 mg g -1 for MWCNT and SWCNT, respectively.

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Section: Effects Of Ph On Adsorptionmentioning

confidence: 99%

Section: Adsorbentsmentioning

confidence: 99%

Section: Isotherm Model Equationmentioning

confidence: 99%

Section: Equilibrium Studiesmentioning

confidence: 99%

Section: Equilibrium Studiesmentioning

confidence: 99%

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Adsorption of a textile dye from aqueous solutions by carbon nanotubes

et al. 2013

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Biosorption of Organic Dyes: Research Opportunities and Challenges

Dotto

Sharma

Pinto

2015

Green Chemistry for Dyes Removal From Wastewater

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Optimization of anionic dye adsorption onto Melia azedarach sawdust in aqueous solutions: effect of calcium cations

Najafpoor

Hossein

Esmaeili

et al. 2015

Asia-Pacific J Chem Eng

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Adsorption of RR141 (an anionic dye) was carried out onto Melia Azaderach sawdust (MAS) in solutions containing low concentrations of calcium ions. The effect of dye concentration, solution pH, Ca 2+ concentration, adsorbent dose, and contact time was investigated by response surface methodology. The results showed that by adding 50 mg L À1 Ca2+ ions, the decolorization rate increased by 3 fold. Cation bridging between anions of RR141 and negatively charged sites of MAS was recognized as the main mechanism for the enhanced dye removal. Higher removal efficiencies were obtained at higher calcium concentrations. Solution pH (4-10) had a negligible effect on the process in presence of bridging Ca 2+ ions. Initial dye concentration and adsorbent dose were the most influential factors in the process. The equilibrium time was found to be 46 min, which was unchanged at different dye concentrations (10-100 mg L À1 ). The dye uptake obeyed the non-linear equations of pseudo-second order kinetic model and Freundlich/Brunauer-Emmett-Teller (BET) isotherm models. The maximum adsorption capacity of 12.92 mg g À1 was calculated from the Langmuir model.Based on the obtained results, adsorptive properties of Melia Azaderach sawdust can be greatly enhanced for uptake of anionic dyes in calcium-containing solutions like natural waters.

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Comparison of Jatropha curcas shells in natural form and treated by non-thermal plasma as biosorbents for removal of Reactive Red 120 textile dye from aqueous solution

Cited by 155 publications

References 64 publications

Adsorption of a textile dye from aqueous solutions by carbon nanotubes

Adsorption of a textile dye from aqueous solutions by carbon nanotubes

Biosorption of Organic Dyes: Research Opportunities and Challenges

Optimization of anionic dye adsorption onto Melia azedarach sawdust in aqueous solutions: effect of calcium cations

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