Basic Dye Adsorption on Low Cost Biopolymer: Kinetic And Equilibrium Studies

Shouman, Mona A.

doi:10.9790/5736-0242736

Cited by 10 publications

(7 citation statements)

References 43 publications

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“…These findings lend credence to the assumption behind Freundlich equation that the isotherm does not reach a plateau as the concentration of adsorbate in solution increases (Limousin et al, 2007). Adsorption isotherms of crystal violet onto adsorbent prepared from sugarcane bagasse, chitosan, cocoa shell, mangrove plant, tamarind fruit shell, mango leaf, teak tree bark and almond tree bark have been described in the literature (Chinniagounder et al, 2011;Patil et al, 2011 andShouman et al, 2012) . …”

Section: Resultssupporting

confidence: 69%

“…These methods can broadly be classified as biological, chemical and physical (Adinew, 2012). Specifically, decolourization, degradation or removal of crystal violent from aqueous solution has been investigated using biodegradation methods (Azmi et al, 1998;Oranusi and Ogugbue, 2005;ZablockaGodlewska et al, 2009;Thorat and Sayyad, 2010;Gursahani and Gupta, 2011;Tom-Sinoy et al, 2011;Kunjadia et al, 2012), methods involving chemical reaction (Mohammed et al, 2011;Patil, 2011;Su and Wang, 2011;Fayoumi et al, 2012;Ovejero et al, 2012) and adsorption methods (Chen et al, 2011;Lin et al, 2011;Nidheesh et al, 2011;Patil et al, 2011;Rammel et al, 2011;Gandhimathi et al, 2012;Nidheesh et al, 2012a;Pandian et al, 2012;Patil and Shrivastava, 2012;Prasad and Santhi, 2012;Shouman et al, 2012). Among these three approaches, adsorption is the preferred method because it does not leave any toxic residue behind in the treated water.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Crystal Violet onto Adsorbents Derived from Agricultural Wastes: Kinetic and Equilibrium Studies

Akinola¹,

Umar²

2015

Journal of Applied Sciences and Environmental Management

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Suitability of adsorbents derived from groundnut shell (GS) and bean pod (BP) in removing crystal violet from aqueous solution was evaluated in a series of batch experiments. Findings reveal that the points of zero charge (PZC) of GS and BP are 3.50 and 3.00 respectively. Findings also show that GS and BP exhibit maxima adsorption at pH values of 6.00 and 5.00 respectively. For both GS and BP, pseudo-second order model gives the best fit for the sorption kinetic data while Freundlich isotherm gives the best fit for the sorption equilibrium data. These findings suggest that the adsorption of crystal violent onto GS and BP probably involves chemisorption and the adsorption does not reach a plateau as the concentration of crystal violet in the aqueous solution increases. This study demonstrates the suitability of GS and BP as low-cost adsorbents for removing crystal violet from industrial wastewater. © JASEM http://dx.doi.org/10.4314/jasem.v19i2.15

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Section: Resultssupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Adsorption of Crystal Violet onto Adsorbents Derived from Agricultural Wastes: Kinetic and Equilibrium Studies

Akinola¹,

Umar²

2015

Journal of Applied Sciences and Environmental Management

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“…Furthermore it is also evident that equilibrium is reached in higher times for high values of initial dye concentration. In the process of dye adsorption, initially the dye molecules have to be transferred at the adsorbent surface and then finally, they have to diffuse into the porous structure of the adsorbent [35]. Therefore, dye at higher initial concentrations will take relatively longer contact time to attain equilibrium due to higher amount of dye molecules respect to the number of available surface adsorption sites that in time decrease.…”

Section: Resultsmentioning

confidence: 99%

Applicative Study (Part I): The Excellent Conditions to Remove in Batch Direct Textile Dyes (Direct Red, Direct Blue and Direct Yellow) from Aqueous Solutions by Adsorption Processes on Low-Cost Chitosan Films under Different Conditions

Rizzi¹,

Longo²,

Fini³

et al. 2014

ACES

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In recent years the development of chitosan (CH) based materials as useful adsorbent polymeric matrices is an expanding field in the area of adsorption science. Even though CH has been successfully used for dye removal from aqueous solutions due to its low cost, no considerations have been made about, for example, the effect of changing the pH of chitosan hydrogelor about the dehydrating effect of Ethanol (EtOH) treatment of chitosan film on the dyes removal from water. Consequently in our laboratory we carried out a study focusing the attention, mainly, on the potential use of CH films under different conditions, such as reducing the intrinsic pH, increasing the hydrophobic character by means of ethanol treatment and neutralization of CH films to improve their absorption power. Textile anionic dyes named Direct Red 83:1, Direct Yellow 86 and Direct V. Rizzi et al. 455Blue 78 have been studied with the aim of reducing the contact time of CH film in waste water improving the bleaching efficiency. Neutralized acid CH film and longtime dehydrated one result to be the better films in dye removal from water. Also the reduction of the CH solution acidity during the film preparation determines the decreasing of the contact time improving the results. The effect of initial dye concentration has been examined and the amount of dye adsorption in function of time t, qt (mg/cm 2 ), for each analyzed film has been evaluated comparing the long term effect with the decoloration rate. A linear form of pseudo-first-order Lagergren model has been used and described. The best condition for removing all examined dyes from various dye solutions appears to be the dehydration of a novel projected CH film obtained by means of the film immersion in EtOH for 4 days. Also CH films prepared by well-known literature procedure and neutralized with NaOH treatment appear having an excellent behavior, however the film treatment requires a large quantity of water and time.

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“…(2015) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] www.deswater.com doi: 10.1080/19443994.2015.1044915 technologies are insufficient for the decolorization of textile wastewater and the color remains due to the nonbiodegradable nature of the chromophoric groups. Physical treatment technologies, such as coagulation/ flocculation, adsorption (mainly on activated carbon), and membrane processes, can result in successful removal of color from the effluent, however, the disadvantage of these methods is the existence of another form of waste for example solid waste such as spent carbon or sludge [2,3].…”

Section: Desalination and Water Treatmentmentioning

confidence: 98%

“…Crystal violet is harmful by inhalation, ingestion, and skin contact and also has been found to cause cancer and severe eye irritation in human beings. It is also a mutagen and a mitotic poison [4,5].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Heterogeneous Fenton-like oxidation of crystal violet using an iron loaded ZSM-5 zeolite

Ünnü

Gündüz

Dükkancı

2016

Desalination and Water Treatment

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A B S T R A C TThe heterogeneous Fenton-like oxidation of a cationic triphenylmethane dye, crystal violet (CV), dissolved in water was investigated using an iron-loaded ZSM-5 zeolite catalyst. The catalyst was characterized by powder X-ray diffraction patterns, Fourier Transform infrared spectroscopy (FTIR), scanning electron microscope, analysis, and nitrogen adsorption-Brunauer-Emmet-Teller (N 2 -BET) studies. The effects of temperature, solution pH, H 2 O 2 amount, catalyst amount, and initial dye concentration were investigated using the heterogeneous Fenton-like oxidation of an aqueous CV. The increase in the concentration of H 2 O 2 from 3 to 7.5 mM enhanced the decolorization. Whereas increasing the H 2 O 2 amount from 7.5 to 10 mM led to a decrease in the color removal from 94.1 to 85.5%. An acidic pH of 3.5 was favorable for the decolorization of the dye. The decolorization of the dye decreased with the increase in the initial concentration of CV. Doubling the amount of the catalyst enhanced the decolorization from 94.1 to 99.6% while the chemical oxygen demand (COD) removal changed from 50 to 58.8%. The increase in temperature positively affected the decolorization and the COD reduction of the dye. The stability of the catalyst was maintained even after using the catalyst for three cycles, and a small iron leaching was also proof of the stability of the catalyst. The initial color removal rate of the CV was described as −r CV , o = 7.3 e −14.7/RT C CV,o 0.7 C H2O2;0 where R = 8.314 J/mol K and C CV,o and C H2O2;0 were in mol/dm 3 .

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Basic Dye Adsorption on Low Cost Biopolymer: Kinetic And Equilibrium Studies

Cited by 10 publications

References 43 publications

Adsorption of Crystal Violet onto Adsorbents Derived from Agricultural Wastes: Kinetic and Equilibrium Studies

Adsorption of Crystal Violet onto Adsorbents Derived from Agricultural Wastes: Kinetic and Equilibrium Studies

Applicative Study (Part I): The Excellent Conditions to Remove in Batch Direct Textile Dyes (Direct Red, Direct Blue and Direct Yellow) from Aqueous Solutions by Adsorption Processes on Low-Cost Chitosan Films under Different Conditions

Heterogeneous Fenton-like oxidation of crystal violet using an iron loaded ZSM-5 zeolite

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