Adsorption of reactive dyes from aqueous solutions by tannery sludge developed activated carbon: Kinetic and equilibrium studies

Geethakarthi, A.; Phanikumar, B. R.

doi:10.1007/bf03326242

Cited by 73 publications

(20 citation statements)

References 30 publications

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“…The government of this country has therefore decided not to allow any textile factory without proper effluent treatment plant (ETP), which is under implementation stage. Reactive dyes are the most problematic compared to other form of dyes (Vandevivere et al 1998;Geethakarthi and Phanikumar 2011). Removal of these dyes from wastewater is a major environmental challenge, and there is a constant need to have an effective process that can efficiently remove these dyes.…”

Section: Introductionmentioning

confidence: 99%

Uptake of Indosol Dark-blue GL dye from aqueous solution by water hyacinth roots powder: adsorption and desorption study

Khan

Mukhlish

Mazumder

et al. 2013

Int. J. Environ. Sci. Technol.

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Adsorption characteristics of water hyacinth roots powder for the removal of Indosol Dark-blue GL dye were investigated in batch mode. Operating variables, such as initial solution pH, presence of detergent, adsorbent dosage, initial concentration and contact time, were studied. The results showed that the adsorption of dye increased with increasing the initial concentration and contact time. The adsorption is highly pH dependent and adsorption capacity increased with decrease in pH. Kinetic study revealed that the uptake of Indosol Dark-blue GL was very rapid within the first 15 min and equilibrium time was independent of initial concentration. Batch equilibrium experiments were carried out at different pH and found that equilibrium data fitted well to Langmuir isotherm model. The maximum sorption capacity of the adsorbent was found as 86 mg g -1 at pH 3 which reduced to 64 mg g -1 at pH 5. The presence of detergent reduced the sorption capacity of the adsorbent significantly. Using equilibrium and kinetic data, the forward and backward rate constants were determined from the unified approach model. Desorption study revealed that the dye can be recovered by swing the pH from low to high.

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Section: Introductionmentioning

confidence: 99%

Uptake of Indosol Dark-blue GL dye from aqueous solution by water hyacinth roots powder: adsorption and desorption study

Khan

Mukhlish

Mazumder

et al. 2013

Int. J. Environ. Sci. Technol.

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“…The experimental data has fitted well in Langmuir isotherm, and the linear form the isotherm is represented as Eq. (3) (Geethakarthi and Phanikumar 2011;Manoj Kumar Reddy et al 2013a;Ramaraju et al 2013)…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Preparation of activated carbons from bio-waste: effect of surface functional groups on methylene blue adsorption

Reddy

Krushnamurty

Mahammadunnisa

et al. 2014

Int. J. Environ. Sci. Technol.

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Low-cost activated carbons were prepared by physical activation of bio-waste rice husk. Various physicochemical characterization techniques confirmed the high surface area and oxygen functional groups on the surface. It has been confirmed that activation under humidified carbon dioxide followed by ozonation resulted the highest number of surface functional groups on activated carbon. Nitrogen adsorption-desorption isotherms confirmed the highest surface area (417 m 2 /g), whereas elemental analysis ensured the increasing oxygen content after activation. Temperature-programmed decomposition quantified these surface oxygen functional groups, and it was concluded that ozonation increased both acidic and basic groups. The developed activated carbons were tested during the removal of a model dye methylene blue from aqueous medium in the concentration range 10-30 mg/L. Typical results indicated that adsorption studies are consistent with the Langmuir isotherm model with maximum monolayer adsorption capacity of 28.5 mg/g, and the dimensionless separation factor (R L ) values between 0.006 and 0.030 confirmed a favorable adsorption. Methylene blue adsorption followed pseudo-second order kinetics indicating MB was adsorbed onto the surface via chemical interaction.

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“…Reactive dye is soluble in water and strongly binds to fabric fibers and leathers [4] ; it produces a dense color in water [5]. Every year, a high amount of reactive dyes is produced, 10-15% of which is released back to the environment, i.e., water bodies, and most are carsinogenic [5].…”

Section: Introductionmentioning

confidence: 99%

“…Every year, a high amount of reactive dyes is produced, 10-15% of which is released back to the environment, i.e., water bodies, and most are carsinogenic [5]. If wastes containing chromium and reactive dyes are not controlled, they could lower the water quality, and thus must be treated properly as soon as possible.…”

Section: Introductionmentioning

confidence: 99%

Effectivity of Vertical Sub-Surface Downflow Constructed Wetland System with Varying Composition in Reducing Chromium and Color in Synthetic Textile Wastewater

2016

IJACEBS

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Abstract-Textile and leather tannery wastewater pollute water bodies with their content of chromium metal (Cr) and synthetic dyes which are highly toxic. The use of constructed wetland systems is an approach to treat such wastewater before being discharged directly into the environment. This study was conducted to examine the effectiveness of vertical sub-surface downflow constructed wetlands with varying composition in decreasing Cr concentration and color thickness (value) in synthetic textile wastewater. Systems were varied by substrate composition and presence of the plant Leersia hexandra. Synthetic textile wastewater containing K 2 Cr 2 O 7 and reactive dye were flowed downward into five systems: (1) soil-sandgravel substrate, without plants; (2) soil-sand-wood chips substrate, without plants; (3) soil-sand-gravel substrate, and L.hexandra plants; (4) soil-sand-wood chips substrate, and L. hexandra plants; and (5) a system without substrate or plants as control. Chromium concentration and color thickness were measured at 8, 16, 24, 32 and 40 hours after treatment. Measurements at 8 hours showed that systems no. 1, 2, 3, and 4 decreased Cr concentration in effluent as much as 87,6%; 79,1%; 81,4%; and 89,2% respectively. Meanwhile Cr concentration in the control system's effluent remained relatively constant. Systems no. 1, 2, 3, and 4 decolorized the effluent up to 94,6%; 89,6%; 93,4%; and 86,0% respectively; meanwhile, color in the control system was unchanged. All four treatment systems could effectively reduce Cr concentration and color thickness in synthetic textile wastewater. However, results did not support the hypothesis that the presence of plants would significantly affect Cr removal, or that the addition of wood chips to substrate would enhance decolorization effects.

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Adsorption of reactive dyes from aqueous solutions by tannery sludge developed activated carbon: Kinetic and equilibrium studies

Cited by 73 publications

References 30 publications

Uptake of Indosol Dark-blue GL dye from aqueous solution by water hyacinth roots powder: adsorption and desorption study

Uptake of Indosol Dark-blue GL dye from aqueous solution by water hyacinth roots powder: adsorption and desorption study

Preparation of activated carbons from bio-waste: effect of surface functional groups on methylene blue adsorption

Effectivity of Vertical Sub-Surface Downflow Constructed Wetland System with Varying Composition in Reducing Chromium and Color in Synthetic Textile Wastewater

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