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Ho, Yuh‐Shan; Chiang, Cheng‐Chin

doi:10.1023/a:1011652224816

Cited by 396 publications

(89 citation statements)

References 27 publications

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“…The differential form of the pseudo-second order reaction equation may be written as [38] ( 6) where k 2 is the pseudo-second rate constant (mg/g min), as shown in Table 4. After integration, considering the boundary conditions, the linearized form of this model is given as (7) The intraparticle diffusion model was first proposed by Weber and Morris [39], who concluded that the uptake was proportional to the square root of the contact time during the course of adsorption, i.e., (8) where K d is the rate constant of the intraparticle transport (mg/ gh 0.5 ).…”

Section: Effect Of Dye Solution Ph --------------------mentioning

confidence: 99%

Adsorption of cationic dye (MB) and anionic dye (AG 25) by physically and chemically activated carbons developed from rice husk

A¹,

A²,

El-Bana³

2012

Carbon letters

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Dye removal from waste water via adsorption by activated carbons (ACs) developed from agricultural wastes represents an ideal alternative to other expensive treatment options. Physical and chemical ACs were prepared from rice husks. The textural properties of the ACs were characterized by Brunauer-Emmett-Teller-N 2 adsorption and scanning electron microscopy. The chemistry of the carbon surface was investigated by Fourier transform infrared spectroscopy, base and acid neutralization capacities, pH of the active carbon slurry, and pH pzc . The adsorption capacities of the ACs for the basic dye (methylene blue) and acid dye (acid green 25) were determined using parameters such as contact time, pH, and temperature. NaOH-ACs showed the highest surface area and total pore volume, whereas steam-ACs showed the lowest ones.

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Section: Effect Of Dye Solution Ph --------------------mentioning

confidence: 99%

Adsorption of cationic dye (MB) and anionic dye (AG 25) by physically and chemically activated carbons developed from rice husk

A¹,

A²,

El-Bana³

2012

Carbon letters

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“…The results show that the sorption capacity for cadmium increases from 0.486-1.266 mg g −1 when the mixed sorbent varies from 100 % of date pits (pits date only) to 90% of date pits and 10% of olive stone in mixture; and increases from 0.575-1.41 mg.g −1 when the mixed sorbent varies from 100 % of olive stone (olive stone only) to 90% of olive stone and 10% of date pits in mixture. This indicates that with a mixture of sorbent, more surface area is made available and therefore the total number of sites increases (Ho and Chiang, 2002).…”

Section: ------------------------------------------------------mentioning

confidence: 97%

Kinetics and Thermodynamics of Cd(II) Ions Sorption on Mixed Sorbents Prepared from Olive Stone and Date Pit from Aqueous Solution

Babakhouya¹

2010

American Journal of Environmental Sciences

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Problem statement:The aim of this study is to remove Cd(II) ions from aqueous solutions by adsorption. Mixed sorbent prepared from olive stone and date pit, an agricultural solid by-product was used as adsorbent. Approach: The adsorption experiments of Cd(II) onto the mixture of olive stone and date pit were conducted at different parameters such as, percent of olive stone and date pit in the mixture, temperature, initial solution pH and initial Cd(II) concentration. Adsorption isotherms were obtained at different percent of olive stone and date pit in the mixture. Results: This adsorption data was fitted with the Langmuir. Kinetic studies revealed that the initial uptake was rapid and equilibrium was established in 20 min for all the studied metals and that the data followed the pseudosecond order reaction. The thermodynamic of Cadmium sorption on the mixed sorbent follows the Langmuir model and the sorption capacity for cadmium increases when we add a small amount of olive stone at date pits (90% of date pits in mixture and 10% of olive stone) and a small amount of date pits at olive stone (90% of olive stone and 10% of date pits in mixture. In addition, the thermodynamic parameters, standard free energy (∆G°), standard enthalpy (∆H°) and standard entropy (∆S°) of the adsorption process were calculated. The sorption of Cd(II) onto the mixture of olive stones and dates pit is spontaneous and presents an endothermic nature. The characteristics of the mixture were determined by the analysis of infra red spectral analysis. Conclusion: The results show that the mixture sorbent from olive stone and date pit is an alternative low-cost adsorbent for removing Cd(II).

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“…To describe the adsorption kinetics a pseudo-second order rate model reported in the literature was applied [15][16][17] in the following form t/q t =(1/h) + (1/q e(2) )t (4) Where, h is the initial sorption rate (mg g -1 min -1 ); q e (2) is the amount of metal ion adsorbed at equilibrium (mg/g) and q t is the adsorbed at time t (mg/g).…”

Section: Kineticsmentioning

confidence: 99%

Studies on the Removal of Ni(II) from Aqueous Solutions Using Chemically Activated Pistachios Seed Shell and Commercially Available Carbon

2017

Chem Sci Trans

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Abstract:The powder of pistachios seed shell carbon (PSSC) and commercially available (CAC) carbon were used for the removal of Ni(II) from aqueous solutions. Pista seed shell carbon is a natural, low cost and eco friendly adsorbent. Pistachios seed shell carbon was prepared by charring with concentrated HCl and the carbon's characteristics such as moisture content, ash content, matter soluble in both water and acid, pH, decolourising power, iron content and ion exchange capacity were determined. The carbon is characterized by scanning electron microscopy, dispersive energy of spectroscopy (EDS), fourier transform-Infrared spectroscopy (FT-IR) before and after adsorption. The adsorbents are tested by using batch experiments under controlled conditions. The effect of various experimental parameters such as equilibration time, pH, adsorbent dose are investigated. The obtained equilibrium adsorption data is fitted to the non-linear forms of Langmuir adsorption isotherm and Freundlich adsorption isotherm. The results obtained indicate that PSSC is a very good adsorbent than CAC and it can be used for the separation of heavy metals from synthetic water.

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Cited by 396 publications

References 27 publications

Adsorption of cationic dye (MB) and anionic dye (AG 25) by physically and chemically activated carbons developed from rice husk

Adsorption of cationic dye (MB) and anionic dye (AG 25) by physically and chemically activated carbons developed from rice husk

Kinetics and Thermodynamics of Cd(II) Ions Sorption on Mixed Sorbents Prepared from Olive Stone and Date Pit from Aqueous Solution

Studies on the Removal of Ni(II) from Aqueous Solutions Using Chemically Activated Pistachios Seed Shell and Commercially Available Carbon

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