Effect of carbon surface chemistry on the removal of reactive dyes from textile effluent

Al‐Degs, Yahya S.; Khraisheh, Majeda; Allen, Stephen; Ahmad, Masroor

doi:10.1016/s0043-1354(99)00200-6

Cited by 542 publications

(254 citation statements)

References 24 publications

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“…For pH value higher than the pH zpc indicates that the superficial charge is negative and the adsorption of cations are favoured. Similar results were reported by Al-Degs et al (2000) in the adsorption of commercial activated carbon F-400 on three reactive dyes. The pHzpc value for F-400 was found to be 7.2 and the pH values measured at equilibrium for the three reactive dyes studied were 5.5, 5.0 and 5.0, respectively, for the yellow, black and red reactive dyes.…”

Section: Effect Of Ph Of Adsorption Kineticssupporting

confidence: 90%

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

Geethakarthi

Phanikumar

2011

Int. J. Environ. Sci. Technol.

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AB S TRAC T:Adsorption kinetic and equilibrium studies of two reactive dyes, namely, Reactive Red 31 and Reactive Red 2 were conducted. The equilibrium studies were conducted for various operational parameters such as initial dye concentration, pH, agitation speed, adsorbent dosage and temperature. The initial dye concentration was varied from 10 -60 mg/L, pH from 2 -11, agitation speed from 100-140 rpm, adsorbent dosage from 0.5 g to 2.5 g and temperature from 30 o C -50 o C respectively. The activated carbon of particle size 600 µm was developed from preliminary tannery sludge. The dye removal capacity of the two reactive red dyes decreased with increasing pH. The zero point charge for the sludge carbon was 9.0 and 7.0 for the two dyes, respectively. Batch kinetic data investigations on the removal of reactive dyes using tannery sludge activated carbon have been well described by the lagergren plots. It was suggested that the Pseudo second order adsorption mechanism was predominant for the sorption of the reactive dyes onto the tannery sludge based carbon. Thus, the adsorption phenomenon was suggested as a chemical process. The adsorption data fitted well with Langmuir model than the Freundlich model. The maximum adsorption capacity(q 0 ) from Langmuir isotherm were found to have increased in the range of 23.15-39.37 mg/g and 47.62-55.87 mg/g for reactive dyes reactive red 31 and reactive red 2, respectively.

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Section: Effect Of Ph Of Adsorption Kineticssupporting

confidence: 90%

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

Geethakarthi

Phanikumar

2011

Int. J. Environ. Sci. Technol.

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“…In the case where the pH<pH PZC , the surface of the marble powder has a positive charge, whereas at pH>pH PZC , the surface has a negative charge. [24]. The pH PZC is the point where the pH final = pH initial [22], for the marble powder used in this work, the pH PZC = 8.3 this is in agreement with the results founded by Shaban E. Ghazy H.M. Gad and Abdullah [25].…”

Section: Characterization Of the Adsorbent A Determining The supporting

confidence: 91%

Kinetics of Direct Yellow 50 Dye Adsorption onto Marble Powder Sorbents

Diouri¹,

Chaqroune²,

Kherbeche³

et al. 2014

IJIRSET

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ABSTRACT:The aim of this present work is evaluation of the effect of marble powder, which is an industrial discharge, in the adsorption of a direct "yellow 50" dye, used in traditional industries of textile. On the other hand, various techniques for characterizing the adsorbent were used, in particular X-ray Diffraction (XRD), X-ray Fluorescence spectroscopy, Scanning Electron Microscopy (SEM), Fourier Transform Infrared spectroscopy (FTIR) and Raman spectroscopy. The effect of various experimental factors; adsorbent dose, contact time (equilibrium is established after 20 minutes), dye concentration and pH media, were studied by using the batch technique. The isotherms of adsorption data were analyzed by various adsorption isotherm models such as Langmuir and Freundlich. The dye yellow adsorption by marble powder made have excellent performance related to the adsorption potential.

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“…The combined influence of all the functional groups of activated carbon determines pH pzc , i.e., the pH at which the net surface charge on carbon was zero. At pH \ pH pzc , the carbon surface has a net positive charge, while at pH [ pH pzc the surface has a net negative charge (Al-Degs et al 2000). Cation adsorption becomes enhanced at higher than the pHpzc, while adsorption of anions is equally enhanced at pH less than pHpzc (Almeidal et al 2009;Farahani et al 2011).…”

Section: Energy Dispersive X-raymentioning

confidence: 99%

Sustainable conversion of agro-wastes into useful adsorbents

et al. 2016

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Preparation and characterization of raw and activated carbon derived from three different selected agricultural wastes: kola nut pod raw and activated (KNPR and KNPA), bean husk raw and activated (BHR and BHA) and coconut husk raw and activated (CHR and CHA) were investigated, respectively. Influences of carbonization and acid activation on the activated carbon were investigated using SEM, FTIR, EDX, pH pzc and Boehm titration techniques, respectively. Carbonization was done at 350°C for 2 h followed by activation with 0.3 M H 3 PO 4 (orthophosphoric acid). Results obtained from SEM, FTIR, and EDX revealed that, carbonization followed by acid activation had a significant influence on morphology and elemental composition of the samples. SEM showed welldeveloped pores on the surface of the precursors after acid treatment, FTIR spectra revealed reduction, broadening, disappearance or appearance of new peaks after acid activation. EDX results showed highest percentage of carbon by atom respectively in the order BHA [ KNPA [ CHA respectively. The pH pzc was found to be 5.32, 4.57 and 3.69 for KNPA, BHA and CHA, respectively. Boehm titration result compliments that of pH pzc , indicating that the surfaces of the prepared adsorbents are predominantly acidic. This study promotes a sustainable innovative use of agrowastes in the production of cheap and readily available activated carbons, thereby ensuring more affordable water and effluent treatment adsorbents.

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Effect of carbon surface chemistry on the removal of reactive dyes from textile effluent

Cited by 542 publications

References 24 publications

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

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

Kinetics of Direct Yellow 50 Dye Adsorption onto Marble Powder Sorbents

Sustainable conversion of agro-wastes into useful adsorbents

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