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The Effect of Different Operating Conditions on Removal of Reactive Dye by Green Carbon Adsorption

TL;DR: In this article, the removal of reactive dye (Remazol red denoted as RR) from aqueous solutions onto green carbon under various experimental conditions was investigated, and the maximum dye removal was obtained as 88.97% with 0.4 g/50 mL adsorbent dosage within 1 h contact time.
Abstract: The aim of this study was to investigate the removal of reactive dye (Remazol Red denoted as RR) from aqueous solutions onto green carbon under various experimental conditions. Green carbon derived from sunflower seed cake (SSCAC) by impregnation with 50% wt. NH 4 Cl solution following low temperature carbonization methods was characterized by FT-IR, SEM and elemental analysis. SSCAC was used as the adsorbent to examine the effects of pH, adsorbent dosage, contact time, temperature and electrolytes. The adsorption of RR on SSCAC was favored at acidic medium with pH value of 2. When 50 mg/L dye solution was used, the maximum dye removal was obtained as 88.97% with 0.4 g/50 mL adsorbent dosage within 1 h contact time. The adsorption isotherm was best defined by the Langmuir model and dimensionless separation factors (R L values) denoted that the adsorption was favorable. Kinetic study was found to be followed by the pseudo-second order model with high correlation coefficients.
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Journal ArticleDOI
TL;DR: In this article, a newly isolated yeast, Diutina rugosa capable of decolorizing indigo dye was investigated, and the optimization of physicochemical parameters such as pH of the solution, initial dye concentration, adsorbent mass, and temperature were studied to scale- up the conditions of dye removal.
Abstract: Isolation, identification, and characterization of newly isolated yeast, Diutina rugosa capable of decolorizing indigo dye were investigated in this study. Molecular and phylogenetic analyses of 23S rRNA sequence data indicated that the yeast belonged to the new genus, Diutina . The optimization of physicochemical parameters such as pH of the solution (2–8), initial dye concentration (10–60 mg L −1 ), adsorbent mass (0.1–2 g), and temperature (10–50 °C) was studied to scale- up the conditions of dye removal. Furthermore, complete decolorization (99.97%) of indigo dye (10 mg L −1 ) was achieved at pH 2, temperature 30 °C and 2.0 g cell biomass within 5 days. Degradation was monitored through UV–vis spectrophotometric, FTIR, and GCMS analyses. The results of FTIR analysis obtained revealed the loss and shifts in spectra peaks of the experimental in comparison with the biological control. Possible degradation pathway was proposed using the intermediate metabolites; 1, 2-dihydro-3 H -indol-3-one and cyclopentanone obtained through GCMS analysis. The enzyme analyses revealed significant inductions and major roles played by NADH-DCIP reductase and lignin peroxidase in the asymmetric cleavage, initial reduction and deamination of indigo dye. The equilibrium experimental data were fitted to Langmuir, Freundlich and Temkin adsorption isotherms with high adjusted coefficient of determination values; adjR 2 = 0.907, adjR 2 = 0.867, and adjR 2 = 0.965 respectively. However, the Langmuir and Temkin adsorption isotherms affirmed the monolayer and heterogeneous biosorption characteristics of Diutina rugosa. Temkin adsorption isotherm model (R 2 = 0.971) represented the best fit of experimental data than other isotherm models.

35 citations


Cites background from "The Effect of Different Operating C..."

  • ...Lower dye concentration of indigo dye propels and favors mass transfer resistance between solid and aqueous surfaces [48]....

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Journal ArticleDOI
TL;DR: In this article, the potential of converting Asteraceae crops into biochars is investigated. But, a large amount of agricultural wastes has been yearly released from Asteraceae crop, causing adverse impacts on the environment.

32 citations

Journal ArticleDOI
TL;DR: Thiazole Yellow G dye was completely mineralised by Aspergillus niger LAG and a degradation pathway was proposed showing initial asymmetric cleavage action, confirming the dye’s detoxified status.

21 citations


Cites result from "The Effect of Different Operating C..."

  • ...Yargic et al [23] also corroborated the fact that lower concentrations of thiazole yellow G dye propel mass transfer resistance between adsorbent and adsorbate....

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References
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Journal ArticleDOI
TL;DR: It is evident from a literature survey of about 210 recent papers that low-cost sorbents have demonstrated outstanding removal capabilities for certain dyes, and chitosan might be a promising adsorbent for environmental and purification purposes.

3,906 citations


"The Effect of Different Operating C..." refers background in this paper

  • ...Adsorption plays a key role in modern industries with the increasing environmental consciousness of people all over the world [4]....

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Journal ArticleDOI
TL;DR: The paper examines the mismatch between strong scientific progress in the field of biosorption and lack of commercialization of research and examines various biosorbents, which are capable of decolorizing dye wastewaters.

713 citations


"The Effect of Different Operating C..." refers background in this paper

  • ...It can be preferred that the salt cations neutralize the negative charge of the carbon surface enabling the adsorption of more molecules or the cations to act directly on the negative adsorbate ions [15]....

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Journal ArticleDOI
TL;DR: Sunflower seed hull was an attractive candidate for removing methyl violet from aqueous solution and the single-stage batch-adsorber design of the adsorption of MV onto SSH was studied based on the Freundlich isotherm equation.

318 citations


"The Effect of Different Operating C..." refers background in this paper

  • ...) is cultivated for the production of cooking oil with the total world production of 38 million tons, thus oil industries take out tons of seed cake as biomass material [5]....

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  • ...where k2 is the rate constant of pseudo-second order adsorption (g/mg∙min) [5]....

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Journal ArticleDOI
TL;DR: The coir pith activated carbon was not only effective in removal of colour but also significantly reduced COD levels of the textile wastewater.

298 citations


"The Effect of Different Operating C..." refers background in this paper

  • ...Then it has to diffuse from boundary layer film onto adsorbent surface and finally, it has to diffuse into the porous structure of the adsorbent [2]....

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  • ...They are not easily biodegradable, thus, the color may still remain in the effluent even after extensive treatment [2]....

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Journal ArticleDOI
TL;DR: In this paper, the effects of dye initial concentration, contact time, solution temperature and pH on RBO3R adsorption were investigated and it was found that the adsorptive process was endothermic with the reaction mechanism follows a physisorption process.

239 citations


"The Effect of Different Operating C..." refers background or methods in this paper

  • ...The amount of dye adsorbed per unit mass is calculated using the following equation [3]:...

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  • ...The dye removal efficiency is defined as [3]:...

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  • ...where k1 is the rate constant of pseudo-first order adsorption (min −1 ), t is the contact time (min), qe and qt (mg/g) are the amounts of RR adsorbed at equilibrium and at time t (min), respectively [3]....

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  • ...Physical or chemical treatment processes such as flocculation combined with flotation, electroflocculation, membrane filtration, electrokinetic coagulation, electrochemical destruction, ion-exchange, irradiation, adsorption, precipitation, ozonation are used to treat dye wastewater [3]....

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  • ...The pseudo-second order model estimates the behavior over the whole range adsorption [3] and is also based on the adsorption capacity of the solid phase....

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