Adsorption of phenol and m-chlorophenol on organobentonites and repeated thermal regeneration

Lin, Sheng H.; Cheng, Mei-Ling

doi:10.1016/s0956-053x(01)00029-0

Cited by 85 publications

(42 citation statements)

References 20 publications

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“…A large value of b also implies that strong bonding of phenolnoccurred with Sorbent [7] . Similar observation have been reported of the sorption of phenol on; bentonite, organobentonite and palm seed coat activated carbon, and the sorption of antimony and cadmium on rice husk [2,4,6,16,17,21] . …”

Section: Adsorption Isothermssupporting

confidence: 87%

“…In the past several decades, extensive research has been conducted to develop innovative and promising adsorbent material for dealing with the treatment problem of contaminate industrial effluents. The ultimate goal of this endeavor is to identify an effective and expensive adsorbent for the Volatile Organic Compound (VOC) removal from aqueous solution [2] . Phenols as a class of organics are similar in structure the more common herbicides and insecticides in that they are resistant to biodegration.…”

Section: Introductionmentioning

confidence: 99%

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Potential of Rice Husk and Rice Husk Ash for Phenol Removal in Aqueous Systems

Mahvi¹,

Maleki²,

Eslami³

2004

American J. of Applied Sciences

171

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Abstract:The potential of rice husk and rice husk ash for phenol adsorption from aqueous solution was studied. Batch kinetics and isotherm studies were carried out under varying experimental conditions of contact time, phenol concentration, adsorbent dose and pH. Adsorption equilibrium of rice husk and rice husk ash was reached within 6 hours for phenolic concentration 150-500 µg/L and 3 hours for phenol concentration 500-1300 µg/L, respectively. Kinetics of adsorption obeyed a firstorder rate equation. The adsorption of phenol increases with increasing the solution pH value. The suitability of the Freundlich and Langmuir adsorption models of the equilibrium data was investigated for each phenol-sorbent system. The results showed that the equilibrium data for all the phenol-sorbent systems fitted the Freundlich model best within the concentration range studied. A comparative study showed that rice husk ash is very effective than rice husk for phenol removal. The studies showed that the rice husk ash can be used as an efficient adsorbent material for removal of phenolic from water and wastewater.

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Section: Adsorption Isothermssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Potential of Rice Husk and Rice Husk Ash for Phenol Removal in Aqueous Systems

Mahvi¹,

Maleki²,

Eslami³

2004

American J. of Applied Sciences

171

View full text Add to dashboard Cite

show abstract

“…These constants can be evaluated from the intercept and slope of the linear plot experimental data of 1/Q e (g/mg) versus 1/C e (L/mg) (Giles and Nakhwa 1962;Lin and Cheng 2002). The linear form of the Langmuir isotherm model can be represented by the following relation:…”

Section: Langmuir Isotherm Modelmentioning

confidence: 99%

Adsorption of phenol on natural clay

et al. 2012

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Natural clay being locally abundant and cheap material in Algeria can be easily activated to become a promising adsorbent for phenol removal from aqueous solution. The natural clay before and after activation was characterized using XRD and IR techniques. The effects of various experimental parameters, such as initial phenol concentration, temperature, pH, contact time, and adsorbent dose on the adsorption extent were investigated. Langmuir adsorption model was used for the mathematical description of the adsorption equilibrium and the equilibrium data fixed very well with this model. The activated natural clay had the monolayer adsorption capacity equal to 15 mg/g at pH value of 5.0 and 23°C; adsorption measurements show that the process is very fast and physical in nature. The extent of the phenol removal increased with decrease in the initial concentration of the phenol and contact time of solution. The results showed that as the amount of the adsorbent was increased, the percentage of phenol removal increased accordingly. Thermodynamic parameters showed that the adsorption of phenol on activated natural clay was exothermic.

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“…Thus, HDTMA can be used to modify clay to improve its sorption capability. A successful response to this synthetic challenge was given by several authors who prepared organobentonites by using cations of alkylammonium for the adsorption of VOCs [5,6].…”

Section: Introductionmentioning

confidence: 99%

Sorption study of organic contaminant on raw and modified clay materials

Dammak

Fakhfakh

Fourmentin

et al. 2013

MATEC Web of Conferences

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Abstract. The adsorption of volatile organic compound VOC (o-xylene) was studied by a static headspace coupled to gas chromatography in natural and intercalated clay. Vapor-solid adsorption isotherms of o-xylene were measured at 20 • C, 30 • C and 40 • C. Clay was modified with hexadecyl trimetyl ammonium bromide (HDTMA). Absolute values of the amounts of o-xylene adsorbed in intercalated clay were about eighteen times higher than natural clay. The adsorption isotherm were analysed with Langmuir, Freundlich, Langmuir-Freundlich and Toth models. LangmuirFreundlich model describes well the equilibrium adsorption data. The evaluation of thermodynamic parameters presents an exothermic and spontaneous adsorption process.

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Adsorption of phenol and m-chlorophenol on organobentonites and repeated thermal regeneration

Cited by 85 publications

References 20 publications

Potential of Rice Husk and Rice Husk Ash for Phenol Removal in Aqueous Systems

Potential of Rice Husk and Rice Husk Ash for Phenol Removal in Aqueous Systems

Adsorption of phenol on natural clay

Sorption study of organic contaminant on raw and modified clay materials

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