Adsorption of cellulose triacetate on calcium silicate

Trivedi, H. C.; Patel, Vikas; Patel, R. M.

doi:10.1016/0014-3057(73)90036-0

Cited by 123 publications

(39 citation statements)

References 16 publications

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“…should be equal to the intercept of a plot of log(q e q t ) against t. In order to ® t equation (2) to experimental data, the equilibrium sorption capacity, q e , must be known. In many cases q e is unknown and as chemisorption tends to become unmeasurably slow, the amount sorbed is still signi® cantly smaller than the equilibrium amount 24 .…”

Section: The Pseudo-first Order Equationmentioning

confidence: 99%

“…Several applications of the Lagergren equation have been widely applied throughout the years. An early application of the pseudo-® rst order rate equation of Lagergren was the sorption of cellulose triacetate from chloroform onto calcium silicate by Trivedi et al 2 . Numerous studies report ® rst order Lagergren kinetics for the sorption of metals such as the sorption of As(III) from aqueous solutions by haematite 3 , the sorption of nickel(II) from aqueous solutions by Woolastonite and china clay 4,5 , the sorption of chromium(VI) by bismuth trioxide 6 , the sorption of cadmium(II) onto hydrous ceric oxide 7 , the sorption of chromium(III) by natural moss and chromium(VI) by copper-coated moss 8 , the sorption of mercury(II) onto hydrous zirconium oxide 9 , the sorption of lead(II) onto kaolinitic clay 10 , the sorption of arsenite(III) and arsenate(V) using basic yttrium carbonate 11 and the sorption of arsenic(V) on haematite and feldspar 12 ; of dyes such as the sorption of Omega Chrome Red ME (OCRME) using a 1:1 ratio of¯y ash and coal 13 , the sorption of Methylene Blue on water hyacinth roots 14 , the sorption of Orlamar Red BG (ORBG) by Fomitopsis carnea 15 , the sorption of Congo Red, Procin Orange and Rhodamine-B by waste orange peel 16 , the sorption of Congo Red on red mud 17 and the sorption of Acid Blue 29 and Reactive Blue 3 on chrome sludge 18 .…”

Section: Introductionmentioning

confidence: 99%

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A Comparison of Chemisorption Kinetic Models Applied to Pollutant Removal on Various Sorbents

McKay

1998

Process Safety and Environmental Protection

2,034

898

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A comparison of kinetic models describing the sorption of pollutants has been reviewed. The rate models evaluated include the Elovich equation, the pseudo-® rst order equation and the pseudo-second order equation. Results show that chemisorption processes could be rate limiting in the sorption step. The pseudo-second order equation may be applied for chemisorption processes with a high degree of correlation in several literature cases where a pseudo-® rst order rate mechanism has been arbitrarily assumed.

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Section: The Pseudo-first Order Equationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Comparison of Chemisorption Kinetic Models Applied to Pollutant Removal on Various Sorbents

McKay

1998

Process Safety and Environmental Protection

2,034

898

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“…In this study, the adsorption data of PCBs by alginate-montmorillonite were fitted through two kinetic models including pseudo-first-order and pseudo-second-order. The pseudo-first order kinetic (Trivedi et al, 1973) is shown in Eq. (2).…”

Section: Adsorption Kinetic Studymentioning

confidence: 99%

The effect of montmorillonite clay in alginate gel beads for polychlorinated biphenyl adsorption: Isothermal and kinetic studies

Barreca

Orecchio

Pace

2014

Applied Clay Science

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Beads of alginate montmorillonite have been used as sorbent for polychlorinated biphenyls from aqueous solutions. The structure and the differences between the different beads were established by IR spectroscopy (FT-IR). The adsorption at 25°C has been studied in a batch system, following its kinetics and assessing adsorbent dose, initial PCB concentrations, and pH effects. The results show that increasing the initial concentration of the PCBs and the adsorption time favored the adsorption. Adsorption isotherm data were modeled using Chapman, Freundlich and Langmuir adsorption isotherms and the appropriate parameters were calculated. Adsorption of trichlorobiphenyls on alginate-montmorillonite beads followed a Freundlich isotherm type model, while adsorption of tetra-, penta-, and hexachlorobiphenyls displayed a sigmoid-shaped (S-type) isotherm fitting the Chapman sigmoidal equation with the highest non-linear R 2 values among the three tested models. By comparing the percentage adsorptions using the same number of beads (same volumes), best removals were obtained by using alginate montmorillonite beads. Kinetic models were investigated to determine the mechanism of adsorption showing a best fit for the pseudosecond order model (R 2 from 0.998 to 0.982). Moreover, to underline the effect of montmorillonite in alginate gel beads, we have compared the isothermal adsorption curves between alginate montmorillonite and alginate beads.

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“…The rate constant of the adsorption process, k ads , at different temperatures was determined by using the Lagergren rate equation (10,11) log 10 ͑q e Ϫ q͒ ϭ log 10 q e Ϫ k ads 2.303 t, [1] where q e and q (both in mg g…”

Section: Adsorption Dynamicsmentioning

confidence: 99%