Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk

Nassar, Mamdouh M.; Magdy, Yehia H.; Daifullah, Abd El Hakim; Kelany, Hanan A

doi:10.1260/026361708786036070

Cited by 12 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The plots of log K id versus logC o (figure not shown) were linear, thus indicating a gradual increase in K id with increasing C o and supporting the view of an increase in the driving adsorbate from the bulk solution onto the solid surface [32]. The essential characteristics of the Langmuir isotherm can be expressed in terms of a dimensionless constant separation factor or equilibrium parameter R L , which describes the type of isotherm [34] and is defined by the following relationship:…”

Section: Effect Of Phsupporting

confidence: 53%

Adsorption properties of activated carbon prepared from pre-carbonized petroleum coke in the removal of organic pollutants from aqueous solution

Ahmed¹,

El-Enin²,

El-Nabarawy³

2011

Carbon letters

View full text Add to dashboard Cite

Activated carbon was prepared from pre-carbonized petroleum coke. Textural properties were determined from studies of the adsorption of nitrogen at 77 K and the surface chemistry was obtained using the Fourier-transform infrared spectrometer technique and the Boehm titration process. The adsorption of three aromatic compounds, namely phenol (P), p-nitrophenol (PNP) and benzoic acid (BA) onto APC in aqueous solution was studied in a batch system with respect to contact time, pH, initial concentration of solutes and temperature. Active carbon APC obtained was found to possess a high surface area and a predominantly microporous structure; it also had an acidic surface character. The experimental data fitted the pseudo-second-order kinetic model well; also, the intraparticle diffusion was the only controlling process in determining the adsorption of the three pollutants investigated. The adsorption data fit well with the Langmuir and Freundlich models. The uptake of the three pollutants was found to be strongly dependent on the pH value and the temperature of the solution. Most of the experiments were conducted at pH 7; the pH (PZC) of the active carbon under study was 5.0; the surface of the active carbon was negatively charged. The thermodynamic parameters evaluated for APC revealed that the adsorption of P was spontaneous and exothermic in nature, while PNP and BA showed no-spontaneity of the adsorption process and that process was endothermic in nature.

show abstract

Section: Effect Of Phsupporting

confidence: 53%

Adsorption properties of activated carbon prepared from pre-carbonized petroleum coke in the removal of organic pollutants from aqueous solution

Ahmed¹,

El-Enin²,

El-Nabarawy³

2011

Carbon letters

View full text Add to dashboard Cite

show abstract

“…It should be noted that whereas the present study indicates that the optimum removal of phenol occurred at a pH value of 8, Al-Zahrani et al (2008) reported that the maximum adsorption of phenol occurred in the pH range 4-10. Similarly, Singh et al (1994) reported that, for impregnated fly ash, maximum removal of phenol occurred at a pH value of 6.5.…”

Section: Effect Of Ph On Phenol Adsorptionmentioning

confidence: 85%

“…Among these, the adsorption of phenol using various types of adsorbents such as low-cost clay, activated carbon (Nassar et al 2008), silica, etc. have been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…have been investigated. A wide array of adsorbents such as waste tyre rubber granules (Alam et al 2006), aniline-modified polystyrene resin (Jianhan et al 2008), lignite (Polat et al 2006), poly(ethyleneimine) (PEI)/SiO 2 (Fuqiang and Baojiao 2007), Aspergillus niger biomass (Rao and Viraraghavan 2002), fly ash (Jain et al 1979;Singh et al 1994;Meng 2003;Wang and Hongwei 2006) and β-cyclodextrin derivativegrafted chitosan (Chen et al 2006) have been examined for the removal of phenol. Aksu and Yener (1999) used dried activated sludge and fly ash as a substitute for activated carbon and compared the capacities achieved with that of granular activated carbon.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of Phenol from Aqueous Solution onto Fly Ash from a Thermal Power Plant

Sharan

Singh

Gupta

2009

Adsorption Science & Technology

View full text Add to dashboard Cite

Phenol ranks as one of the most common hazardous pollutants present in water and industrial effluents. The object of the work describe herein was to assess the phenol adsorption capacity of fly ash under varying experimental conditions such as adsorbent dosage, pH, varying phenol concentration and contact time. The study showed that, at a phenol concentration of 100 mg/ᐉ, the percentage removal of phenol was 95.69% at an optimum dosage of 7 g/ᐉ fly ash. The effect of the initial phenol concentration indicated that the percentage phenol removal increased with increasing phenol concentration, being a maximum (98.08%) at a phenol concentration of 700 mg/ᐉ. Further increase in phenol concentration (1000 mg/ᐉ) resulted in a slight decrease in phenol removal. The adsorption of phenol also varied with the pH and was found to be a maximum at a pH value of 8. Adsorption equilibrium studies indicated that an equilibrium time of 2 h was necessary for the maximum removal of phenol. Isotherm studies showed that the adsorption of phenol onto fly ash was best described by the Langmuir isotherm relative to the Freundlich isotherm. Accordingly, the Langmuir adsorption coefficients, i.e. the maximum adsorption capacity (q 0 ) and the Langmuir adsorption constant (K L ) were evaluated and found to be 142.86 mg/g and 0.0199 ᐉ/g, respectively. Analysis of the kinetic data indicated that the kinetics of phenol adsorption closely follow the pseudo-second-order model.

show abstract

“…Persistent chemicals discharged into surface water can have adverse influences on human life and aquatic animals and plants. Chemical treatments such as ozone oxidation, 1,2 UV irradiation, 3,4 and adsorption on activated carbon [5][6][7] have been used for the treatment of effluents containing persistent chemicals. However, there are problems to be solved, such as insufficient decreases in dissolved organic carbon, large-scale equipment, and high expenses.…”

Section: Introductionmentioning

confidence: 99%

Removal of alkylphenols by the combined use of tyrosinase immobilized on ion‐exchange resins and chitosan beads

Tamura

Satoh

Kashiwada

et al. 2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

Mushroom tyrosinase was covalently immobilized on a poly(acrylic acid)-type, weakly acidic cation-exchange resin (Daiaion WK10, Mitsubishi Chemical Corp., Tokyo, Japan) with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride salt as a water-soluble carbodiimide. Ion-exchange resins immobilized with tyrosinase were packed in one column, and crosslinked chitosan beads prepared with epichlorohydrin were packed in another column. The enzymatic activity was modified by covalent immobilization, and the immobilized tyrosinase had a high activity in the temperature range of 30-45 C and in the pH range of 7-10. When solutions of various alkylphenols were circulated through the two columns packed with tyrosinase-immobilized ion-exchange resins and crosslinked chitosan beads at 45 C and pH 7 (the optimum conditions determined for p-cresol), alkylphenols were effectively removed through quinone oxidation with immobilized tyrosinase and subsequent quinone adsorption on chitosan beads. The use of chemically crosslinked chitosan beads in place of commercially available chitosan beads was effective in removing alkylphenols from aqueous solutions in shorter treatment times. The removal efficiency increased with an increase in the amount of crosslinked chitosan beads packed in the column because the rate of quinone adsorption became higher than the rate of enzymatic quinone generation. The activity of tyrosinase was iteratively used by covalent immobilization on ion-exchange resins. One of the most important findings obtained in this study is the fact that linear and branched alkylphenols suspected of weak endocrine-disrupting effects were effectively removed from aqueous solutions.

show abstract

Mass Transfer and Adsorption Kinetics of Phenolic Compounds onto Activated Carbon Prepared from Rice Husk

Cited by 12 publications

References 15 publications

Adsorption properties of activated carbon prepared from pre-carbonized petroleum coke in the removal of organic pollutants from aqueous solution

Adsorption properties of activated carbon prepared from pre-carbonized petroleum coke in the removal of organic pollutants from aqueous solution

Adsorption of Phenol from Aqueous Solution onto Fly Ash from a Thermal Power Plant

Removal of alkylphenols by the combined use of tyrosinase immobilized on ion‐exchange resins and chitosan beads

Contact Info

Product

Resources

About