Adsorption properties and breakthrough model of 1,1-dichloro-1-fluoroethane on activated carbons

Tsai, Wen‐Tien; Chang, Ching‐Yuan; Ho, Chih-Yin; Chen, Lu-Yen

doi:10.1016/s0304-3894(99)00058-8

Cited by 56 publications

(20 citation statements)

References 25 publications

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“…It is clear that the Langmuir isotherm has best fitted for the sorption of Cr(VI) on TFW at various temperatures. It has been known that the magnitude of K F indicates a measure of the adsorbent capacity [33]. As indicated Table 4, the values of the exponent n were in the range of 3-6, indicating favourable adsorption.…”

Section: Adsorption Isothermsmentioning

confidence: 83%

Potential of tea factory waste for chromium(VI) removal from aqueous solutions: Thermodynamic and kinetic studies

Malkoç¹,

Nuhoğlu²

2007

Separation and Purification Technology

288

131

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Section: Adsorption Isothermsmentioning

confidence: 83%

Potential of tea factory waste for chromium(VI) removal from aqueous solutions: Thermodynamic and kinetic studies

Malkoç¹,

Nuhoğlu²

2007

Separation and Purification Technology

288

131

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“…It is known that the magnitude of the Freundlich constant indicates a measure of the adsorbent capacity [27]. The values of the n as indicated in Tab.…”

Section: Equilibrium Isothermsmentioning

confidence: 99%

Adsorption of Zinc using Tea Factory Waste: Kinetics, Equilibrium and Thermodynamics

Wasewar¹,

Atif

Prasad

et al. 2008

CLEAN Soil Air Water

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In India, the annual production of tea is ca. 857,000 tonnes, which is 27.4% of the total world production. The amount of tea factory waste (TFW) produced per annum after processing is ca. 190,400 tonnes. TFW can be used as a low cost adsorbent for the removal of toxic metals from the aqueous phase. An investigation was carried out to study the feasibility of the use of TFW as an adsorbent for the removal of the heavy metal, zinc. Equilibrium, kinetic and thermodynamic studies were reported. The straight line plot of log (q e -q) versus time t for the adsorption of zinc shows the validity of the Lagergren equation. The various steps involved in adsorbate transport from the solution to the surface of the adsorbent particles were dealt with by using a Weber-Morris plot, q e versus t 0.5 for the TFW. The rate controlling parameters, k id,1 and k id,2 , were determined and it was found that the macro-pore diffusion rate was much larger than micro-pore diffusion rate. A batch sorption model, which assumes the pseudo-second-order mechanism, was used to predict the rate constant of sorption, the equilibrium sorption capacity and the initial sorption rate with the effect of initial zinc (II) ion concentration. Equilibrium data obtained from the experiments were analyzed with various isotherms, i. e., Freundlich, Langmuir, Redlich-Peterson and Tempkin. The adsorption equilibrium was reached in 30 min and the adsorption data fitted well to all models. The maximum adsorption capacity of TFW for zinc (II) ions was determined to be 14.2 mg/g. The capacity of adsorption on Zn(II) increased with increasing temperatures and pH. The maximum uptake level of zinc was observed at pH of 4.2. The various thermodynamic parameters, i. e., DG8, DH8 and DS8, were estimated. The thermodynamics of the zinc ion/TFW system indicated a spontaneous, endothermic and random nature of the process. The results showed that the TFW, which has low economical value, is a suitable adsorbent for the removal of zinc (II) ions from aqueous solutions.

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“…Methods such as condensation, absorption, adsorption, catalytic oxidation, and incineration have been employed for abatement of VOCs. Adsorption is by far the most widespread technology applied because it provides an economical way to recover VOCs from a wide range of gaseous streams [1][2][3][4][5][6][7]. Activated carbons have been employed for the efficient separation, purification, recovery, and storage of VOCs.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of volatile organic compounds onto activated carbon cloths derived from a novel regenerated cellulosic precursor

Ramos

Bonelli

Cukierman

et al. 2010

Journal of Hazardous Materials

133

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Adsorption properties and breakthrough model of 1,1-dichloro-1-fluoroethane on activated carbons

Cited by 56 publications

References 25 publications

Potential of tea factory waste for chromium(VI) removal from aqueous solutions: Thermodynamic and kinetic studies

Potential of tea factory waste for chromium(VI) removal from aqueous solutions: Thermodynamic and kinetic studies

Adsorption of Zinc using Tea Factory Waste: Kinetics, Equilibrium and Thermodynamics

Adsorption of volatile organic compounds onto activated carbon cloths derived from a novel regenerated cellulosic precursor

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