Removal of Trivalent Chromium From Aquatic Environment by Cement Kiln Dust: Batch Studies

Al-Meshragi, Mohamed; Ibrahim, Hesham G.; Okasha, Aly Y.; Ao, Sio-Iong

doi:10.1063/1.3146200

Cited by 9 publications

(10 citation statements)

References 1 publication

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“…The kinetic data show that the adsorption of topramezone onto both soils could be described by a pseudo-second-order kinetic model, where some R 2 values are higher than 0.9 (Table 5). Also, it is of note that the experimental q t and calculated q 2 values are in a better agreement for a pseudo-second-order kinetic model than the pseudo-first-order kinetic model [43]. The pseudo-first-model R 2 values and kinetic constants are too low, and this may be due to the fact that the influence of the temperature is small on the kinetic constant whatever the porous structure of the adsorbent particle, which suggests that this adsorption is not a pseudo-first-order reaction [44,45].…”

Section: Adsorption Kineticsmentioning

confidence: 71%

Evaluating Biochar Impact on Topramezone Adsorption Behavior on Soil under No-Tillage and Rotary Tillage Treatments: Isotherms and Kinetics

Uwamungu

Nartey

Uwimpaye

et al. 2019

IJERPH

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The evaluation of biochar application on the adsorption behavior of topramezone on soil under no-tillage (NT) and rotary tillage treatments (RT) has been assessed. Fourier Transform Infra-Red Spectrometry (FTIR), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller) (BET) were used for the biochar characterization. Batch experiments were carried out in a laboratory to assess the adsorption of topramezone on soil through equilibrium and kinetic modeling under biochar addition. The clay content has been found to be higher under NT (18.24 ± 0.01) than under RT (15.91 ± 0.02). The total organic carbon was higher under NT. The topramezone adsorption equilibrium reached after 8 and 12 h, for NT and RT, respectively. The kinetic and thermodynamic analyses showed the adsorption under both treatments matched with pseudo-second-order kinetic and Langmuir models, respectively. After biochar addition, the pesticide adsorption capacity (40 < 25 < 15 °C) increased with decreasing temperature suggesting an exothermic adsorption process while negative values of Gibbs free energy (ΔG); −1848.07 and −366.531 J mol−1; for the soil under NT and RT at 25 °C, respectively, indicated spontaneous adsorption. Negative entropy values (ΔS); −21.92 and −78.296 J mol−1K−1, for NT and RT, respectively, explained a decreased randomness process. The enthalpy was higher (p < 0.05) under RT (−23,274.6 J mol−1) than under NT (−1313.73 J mol−1). Conclusively, it was shown that the topramezone adsorption capacity was higher under NT, and biochar addition increased more pesticide adsorption under NT than under RT.

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Section: Adsorption Kineticsmentioning

confidence: 71%

Evaluating Biochar Impact on Topramezone Adsorption Behavior on Soil under No-Tillage and Rotary Tillage Treatments: Isotherms and Kinetics

Uwamungu

Nartey

Uwimpaye

et al. 2019

IJERPH

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“…The CO 2 adsorption capacity should be considered in addition to the kinetics and regeneration of adsorbents. [ 48 ] However, rapid adsorption and desorption kinetics are required for an effective CO 2 adsorption process under typical operating conditions. To confirm the kinetics of CO 2 adsorption, we applied the pseudo‐first‐order and pseudo‐second‐order kinetic models to the adsorption experimental data, as shown in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

Mass transport, kinetic model, and application of CO₂ adsorption on zeolite 5A granules

Sangsuradet,

Worathanakul

2023

CLEAN Soil Air Water

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Environmental damage ranges from soil degradation, air pollution, and wastewater from human‐induced activity. In this study, to reduce CO2 emission, zeolite granules were prepared manually. In addition, the mass transfer and kinetic adsorption were analyzed to understand the mechanism of CO2 adsorption using mathematical models. We studied the effects of amount of binder, temperature, granule size, and flow rate of CO2 on efficient CO2 adsorption on zeolite 5A granules of different sizes (3–4 and 6–7 mm). The kinetics of CO2 adsorption and mass transfer of zeolite 5A granules were evaluated for the rate‐limiting step. The results showed that decreasing the temperature and the amount of binder increased the CO2 adsorption capacity. We observed the highest CO2 adsorption capacity of 2.84 mmol g−1 at 298 K with 4 wt% of the binder at a flow rate of 2 L h−1. The pseudo‐first‐order sorption behavior was the best model with R2 > 0.9832, whereas the root mean square error model showed an R2 < 0.2136. The Biot number and film diffusion model were used to investigate the importance of external mass transfer on intraparticle diffusion. It was confirmed that the adsorption on sustainable zeolite 5A granules was controlled by film diffusion.

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“…The determination coefficient (r 2 ) is used to examine the confirmation of the predicted values of models with experimental data (determination coefficient value close or equal to 1). The validity of these models is evaluated by the determination coefficient (r 2 ), which is within the range of 0-1, in which r 2 closer to unity implies the best fitting toward the particular kinetic model [20].…”

Section: Kinetic Models Of Adsorptionmentioning

confidence: 99%

Experimental Study of Adsorption on Activated Carbon for CO₂Capture

Ibrahim¹,

Al-Meshragi²

2020

CO2 Sequestration

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The adsorption of carbon dioxide (CO) on activated carbon (AC) prepared from olive trees has been investigated by using a fixed bed adsorption apparatus. The adsorption equilibrium and breakthrough curves were determined at different temperatures 30, 50, 70, and 90°C in order to investigate both kinetic and thermodynamic parameters. Maximum CO 2 sorption capacity on AC ranged from 109.5 to 35.46 and from 129.65 to 35.55 mg CO 2 /g of AC for initial concentrations 10 and 13.725% vol., respectively. Different isotherm models are applied to mathematically model the CO 2 adsorption, and on the basis of the estimated adsorption capacity by model and determination coefficient (r 2), the Langmuir model provides a perfect fit to the experimental data owing to closeness of the r 2 to unity. From the correlation coefficient, it is found that the pseudo-second-order model is well-fitted with the experimental data. In addition, it indicates that CO 2 adsorption is a physical adsorption process and demonstrates a behavior of an exothermic reaction, which is consistent with the thermodynamic analysis. The results obtained in this study conclude that AC prepared from olive trees can be considered as adequate for designing a fixed bed cycle to separate carbon dioxide from flue gases and serve as a benchmark while searching for inexpensive and superior activated carbon production in future studies.

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Removal of Trivalent Chromium From Aquatic Environment by Cement Kiln Dust: Batch Studies

Cited by 9 publications

References 1 publication

Evaluating Biochar Impact on Topramezone Adsorption Behavior on Soil under No-Tillage and Rotary Tillage Treatments: Isotherms and Kinetics

Evaluating Biochar Impact on Topramezone Adsorption Behavior on Soil under No-Tillage and Rotary Tillage Treatments: Isotherms and Kinetics

Mass transport, kinetic model, and application of CO₂ adsorption on zeolite 5A granules

Experimental Study of Adsorption on Activated Carbon for CO₂Capture

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Removal of Trivalent Chromium From Aquatic Environment by Cement Kiln Dust: Batch Studies

Cited by 9 publications

References 1 publication

Evaluating Biochar Impact on Topramezone Adsorption Behavior on Soil under No-Tillage and Rotary Tillage Treatments: Isotherms and Kinetics

Evaluating Biochar Impact on Topramezone Adsorption Behavior on Soil under No-Tillage and Rotary Tillage Treatments: Isotherms and Kinetics

Mass transport, kinetic model, and application of CO2 adsorption on zeolite 5A granules

Experimental Study of Adsorption on Activated Carbon for CO2Capture

Contact Info

Product

Resources

About

Mass transport, kinetic model, and application of CO₂ adsorption on zeolite 5A granules

Experimental Study of Adsorption on Activated Carbon for CO₂Capture