Biosorption of Acid Blue 15 using fresh water macroalga Azolla filiculoides: Batch and column studies

Padmesh, T.V.N.; Vijayaraghavan, K.; Sekaran, G.; Velan, M.

doi:10.1016/j.dyepig.2005.06.003

Cited by 120 publications

(56 citation statements)

References 27 publications

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“…The load of metal adsorbed on the surface of chitin was observed to decrease with an increasing flow rate. Similar findings were reported too by Padmesh et al (2006). They investigated the influence of flow rate on biosorption of AB15 by keeping initial dye concentration (100 mg/dm 3 ) and varying the flow rate.…”

Section: Resultssupporting

confidence: 77%

Adsorption of reactive dye on chitosan in air-lift reactor

Filipkowska

Waraksa

2008

Adsorption

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This study was undertaken to identify factors exerting the strongest influence on the adsorption of dye. The maximum adsorption capacity (at the adopted operating conditions) was the main parameter used to evaluate the process. In addition, the feasible adsorption capacity of chitosan was evaluated. Breakthrough experiments were carried out in a circulating air-lift reactor at a constant concentration of reactive dye Black 8 (100 mg/dm 3 ). The tests studied different chitosan concentrations in the reactor and a range of flow intensities. The results of the breakthrough tests were compared by means of apparent mass transfer coefficients, determined by slopes at C/C 0 = 1/2. The adsorption capacity of chitosan was affected to the greatest extent by the flow rate of the medium to the reactor. In turn, the utilization of the maximum adsorption capacity of chitosan, at the assumed efficiency of dye removal, was determined by chitosan concentration in the reactor.

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Section: Resultssupporting

confidence: 77%

Adsorption of reactive dye on chitosan in air-lift reactor

Filipkowska

Waraksa

2008

Adsorption

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“…The λ max values of the wastewater samples varied ±10 nm from the λ max values of pure dyes at a fixed pH. The amount of dye adsorbed onto the CNSAC, q e (mg/g), was calculated by the following mass balance relationship: (1) where C o and C e are the initial and equilibrium liquid-phase concentrations of dye, respectively (mg/L), V the volume of the solution (L), and W is the mass of the CNSAC used (g).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…The discharge of these dyes in the environment is worrying for both toxicological and aesthetical reasons as dyes impede light penetration, damage the quality of the receiving streams and are toxic to food chain organisms [1]. Since dyes have a synthetic origin and complex aromatic molecular structures, they are inert and difficult to biodegrade when discharged into waste streams.…”

Section: Introductionmentioning

confidence: 99%

Removal of methylene blue dye from aqueous solution by activated carbon prepared from cashew nut shell as a new low-cost adsorbent

Kumar

Ramalingam

Kumar

2010

Korean J. Chem. Eng.

161

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Methylene blue dye was adsorbed on an adsorbent prepared from cashew nut shell. A batch adsorption study was carried out with variable adsorbent amount, initial dye concentration, contact time and pH. Studies showed that the pH of aqueous solutions affected dye removal as a result of removal efficiency increased with increasing solution pH. The experimental data were analyzed by the Langmuir, Freundlich, Redlich-Peterson, Koble-Corrigan, Toth, Temkin, Sips and Dubinin-Radushkevich models of adsorption using MATLAB 7.1. The experimental data yielded excellent fits within the following isotherm order: Redlich-Peterson>Toth>Sips>Koble-Corrigan>Langmuir>Temkin>Dubinin-Radushkevich>Freundlich, based on its correlation coefficient values. Three simplified kinetic models including a pseudofirst-order, pseudo-second-order and intraparticle diffusion equations were selected to follow the adsorption process. It was shown that the adsorption of methylene blue could be described by the pseudo-second-order equation. The results indicate that cashew nut shell activated carbon could be employed as a low cost alternative to commercial activated carbon in the removal of dyes from wastewater.

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“…Studies on the treatment of effluents containing heavy metals have revealed adsorption to be a highly effective technique for the removal of heavy metals from dilute aqueous metal solutions [15]. Additionally, adsorption has been found to be superior to other techniques for water reuse in terms of the initial cost, simplicity of design, and easiness of operation [11,16,17,19]. In this study, Cr(VI) and Pb(II) ion removal from aqueous solutions by column adsorption method was investigated by using an adsorbent zeoliteNaX.…”

Section: Introductionmentioning

confidence: 99%

Removal of Cr(VI) and Pb(II) from Wastewater by ZeoliteNaX in Fixed Bed Column

Pandey

Sharma

2017

Water Conserv Sci Eng

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The ability of synthetic zeoliteNaX to remove Cr(VI) and Pb(II) from aqueous solutions was studied in fixed bed column. The effect of bed height (4, 6, 8 in.) and flow rate (0.825, 1.6, 2.14, 4.0, 5.0 L/h) was studied. The uptake and percentage removal of Cr(VI) Pb(II) and on zeoliteNaX for 4-in. column were found to be 5.66 and 8.896 mg/g and 84.99 and 89%, respectively. The bed depth service time (BDST) and Thomas model were used for the analysis of the column. The column experiments showed that the breakthrough time and the exhaustion time are found to increase with increase in bed height. Favorable results were obtained with the BDST model, which describe the experimental data well.

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Biosorption of Acid Blue 15 using fresh water macroalga Azolla filiculoides: Batch and column studies

Cited by 120 publications

References 27 publications

Adsorption of reactive dye on chitosan in air-lift reactor

Adsorption of reactive dye on chitosan in air-lift reactor

Removal of methylene blue dye from aqueous solution by activated carbon prepared from cashew nut shell as a new low-cost adsorbent

Removal of Cr(VI) and Pb(II) from Wastewater by ZeoliteNaX in Fixed Bed Column

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