Brazil nut shells as a new biosorbent to remove methylene blue and indigo carmine from aqueous solutions

Brito, Suzana Modesto de Oliveira; Andrade, Heloysa Martins Carvalho; Soares, Luciana Frota; Azevedo, Rafael Pires de

doi:10.1016/j.jhazmat.2009.09.020

Cited by 182 publications

(44 citation statements)

References 51 publications

(57 reference statements)

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“…The comparison of the q m values is given in Table 6. Our adsorbent did perform fairly well than others that have been previously reported (Bulut and Aydin 2006;De Oliveria Brito et al 2010;ALzaydien 2009;Ncibi et al 2007;Bhattacharya and Sharma 2005;Ansori and Mosayebzadeh 2010;Caparkaya and Cavas 2008;) while it performed below other adsorbents reported by others (Elmorsi 2011;Ofomaja 2007;Salleh et al 2011;Kannan andSundaram 2001 andOlajire et al 2013). …”

Section: Adsorption Isothermsupporting

confidence: 51%

Competitive adsorption of dye species from aqueous solution onto melon husk in single and ternary dye systems

Olajire

Giwa

Bello

2014

Int. J. Environ. Sci. Technol.

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Polluted water may contain more than one dye species. Consequently, the behavior of a particular dye in a water system may be affected by the presence of the others. In this study, the adsorption of methylene blue (MB) in single dye system (SDS) and in ternary dye system (TDS) comprising of MB, congo red and methyl orange onto formaldehyde-treated melon husk (FMH) was investigated as a function of pH, contact time and species concentrations. Surface studies of FMH were investigated by Fourier transform infrared and scanning electron microscopy. The dye species adsorption equilibria were rapidly attained after 60 (SDS) and 90 min (TDS) of contact times. The adsorption kinetics were analyzed using pseudo first-order, pseudo second-order and intraparticle diffusion models and the adsorption data were well described by the pseudo second-order model. The equilibrium adsorption data were interpreted in terms of the Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Harkin-Jura and Halsey isotherm models and the goodness of fittings were inspected using linear regression analysis (R 2 ). Our results indicated that the Langmuir model was best fitted, suggesting monolayer adsorption. Thermodynamic study showed that the adsorptions in SDS and TDS on FMH are favourable. The change in entropy (DS°) and heat of adsorption (DH°) of dye species on FMH in TDS were estimated as 82.2 J/ mol K and 17.95 kJ/mol. respectively while in SDS, they were respectively -43.76 J/mol K and -21.84 kJ/mol. The sorption process in both systems was thermodynamically feasible with negative DG°values.

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Section: Adsorption Isothermsupporting

confidence: 51%

Competitive adsorption of dye species from aqueous solution onto melon husk in single and ternary dye systems

Olajire

Giwa

Bello

2014

Int. J. Environ. Sci. Technol.

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“…A weighed amount (0.2 g) of adsorbent was added to the solution. The flasks were agitated at a constant speed of 150 rpm for 4 h in an incubator shaker (Model Innova 42, New Brunswick Scientific, Canada) at 303 ± 1 K. The influence of particle size (>500 m, 250-500 m and <250 m), pH (2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0), initial dye concentration (10,20,40,50,60,80, 100 mg L −1 ), adsorbent dose (0.5, 1, 2, 3, 4, 5 g L −1 ), contact time (10,20,30,40,60,90,120,180, and 240 min), and temperature (303, 313, 323, 333 K) were evaluated during the present study. Samples were collected from the flasks at predetermined time intervals for analyzing the residual dye concentration in the solution.…”

Section: Batch Experimentsmentioning

confidence: 99%

“…According to this model, if the plot of q t versus t 0.5 gives a straight line, then the adsorption process is controlled by intraparticle diffusion, while, if the data exhibit multi-linear plots, then two or more steps influence the adsorption process [28][29][30].…”

Section: Intraparticle Diffusion Modelmentioning

confidence: 99%

Sea shell powder as a new adsorbent to remove Basic Green 4 (Malachite Green) from aqueous solutions: Equilibrium, kinetic and thermodynamic studies

Chowdhury

Saha

2010

Chemical Engineering Journal

334

134

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“…For a better illustration of these results, it is required to determine experimentally the point of zero charge (pH PZC ). The point of zero charge of FAG was determined as described by the solid addition method using KNO 3 (0.01 M) solution [55,56]. Initial pH of (0.01M) KNO 3 solutions (pH i ) was adjusted from pH 2 to 12 by adding either (0.01 M) HCl or 0.01 M (NaOH).…”

Section: Batch Adsorption Testsmentioning

confidence: 99%

R emoval of Cationic Dye – Methylene Blue - from Aque ous Solution by Adsorption on Fly Ash - based Geopolymer

Alouani¹,

Alehyen²,

Achouri³

et al. 2018

jmes

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Brazil nut shells as a new biosorbent to remove methylene blue and indigo carmine from aqueous solutions

Cited by 182 publications

References 51 publications

Competitive adsorption of dye species from aqueous solution onto melon husk in single and ternary dye systems

Competitive adsorption of dye species from aqueous solution onto melon husk in single and ternary dye systems

Sea shell powder as a new adsorbent to remove Basic Green 4 (Malachite Green) from aqueous solutions: Equilibrium, kinetic and thermodynamic studies

R emoval of Cationic Dye – Methylene Blue - from Aque ous Solution by Adsorption on Fly Ash - based Geopolymer

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