Equilibrium and thermodynamic study of cobalt adsorption on activated carbon derived from date seeds

Aljundi, Isam H.; Al-Dawery, Salam K.

doi:10.1080/19443994.2013.804455

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…From Fig. 1, we could find that ACLM has a coarse porous surface with irregular pores similar with coal-based granular activated carbon [24]. The particle size, morphological features, and porosity of ACLM had not been changed through the load process.…”

Section: Characterization Of the Aclmmentioning

confidence: 89%

Coal-based granular activated carbon loaded with MnO₂as an efficient adsorbent for removing formaldehyde from aqueous solution

Wang

Zhong

Chen

2015

Desalination and Water Treatment

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A B S T R A C TIn this study, coal-based granular activated carbon loaded with MnO 2 (ACLM) was tested as adsorbent for the removal of formaldehyde from aqueous solution. The ACLM was characterized by scanning electron microscopy, energy dispersive X-ray spectrometry, Brunauer-Emmett-Teller, and Fourier transform infrared spectra. The optimized pH of formaldehyde adsorption was 7.0. The removal percentage increased from 21.8 to 72.1% by raising the ACLM dosage from 0.1 to 1.0 g. The formaldehyde adsorption rate increased a little at initial formaldehyde concentrations from 0.6 to 1.8 mg/L. The adsorption equilibrium time was 24 h. The adsorption rate of formaldehyde increased from 58.1 to 61.2% with temperature rising from 298 to 308 K and decreased from 61.2 to 54.0% when temperature from 308 to 318 K. Isotherm modeling revealed that Langmuir equation could better describe the adsorption of formaldehyde onto the ACLM and the maximum adsorption capacity obtained was 4.53 mg/g. Kinetic data efficiently fitted with the pseudo-second order. The decrease of ΔG˚from 298 to 308 K suggested more favorable of formaldehyde adsorption onto the ACLM and increase of ΔG˚from 308 to 318 K revealed that the sorption was more unfavorable. Results from this study suggest that ACLM is an effective adsorbent for the removal of formaldehyde from aqueous solution in drinking water treatment field.

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Section: Characterization Of the Aclmmentioning

confidence: 89%

Coal-based granular activated carbon loaded with MnO₂as an efficient adsorbent for removing formaldehyde from aqueous solution

Wang

Zhong

Chen

2015

Desalination and Water Treatment

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“…(2014) [1][2][3][4][5][6][7][8][9] www.deswater.com doi: 10.1080/19443994.2014.980331 including the manufacturing of methanol such as that exists in regional cities of Sohar and Salalah. These industries are major water consumers and therefore cause large water pollution.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…The most common method of treatment of contaminated water is the use of AC due to its large surface area of adsorption, fast adsorption kinetics, and costeffectiveness. The unique adsorption characteristics of AC depend on the specific surface area, pore structure, and surface functional groups [4][5][6][7][8][9]. However, depending on the adsorption capacity, AC becomes saturated after being used and, thus, needs to be regenerated and reused [10].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Adsorption of methanol from methanol–water mixture by activated carbon and its regeneration using photo-oxidation process

Al-Dawery

2014

Desalination and Water Treatment

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To cite this article: Salam K. Al-Dawery (2014): Adsorption of methanol from methanol-water mixture by activated carbon and its regeneration using photo-oxidation process, Desalination and Water Treatment, Activated carbon (AC) has been used as an adsorbent for centuries as a result of its ability to remove a large variety of compounds from contaminated waters. The objective of this study was to investigate the removal of methanol by adsorption and the use of advanced oxidation process for the regeneration of the exhausted AC as an alternative to thermal, biological, and chemical methods that are currently applied. Several experimental tests were carried out to examine the ability of AC for adsorbing methanol from methanol-water mixture. The results show fast saturation of the AC and short breaking time, especially for solutions consisting of methanol above 3% vol. However, adsorption capacity of exhausted AC with methanol, after washing, showed an improvement in its adsorption capacity over that of fresh AC. This improvement may be due to that methanol may harsh the surface of AC causing an increase in the sizes of pores and cavities. Large cavities were micrograph using scanning electron microscope (SEM). After saturation, AC was regenerated using the photocatalytic process, the adsorption capacity of AC was fully restored. The results showed that the titanium dioxide with the aid of UV light can easily regenerate the AC by oxidizing the organic compounds adsorbed on the surface of AC. It was observed that the increase of UV light intensity had a positive effect on adsorption capacity. However, the increases of TiO 2 concentrations had a limited effect on the adsorption capacity of the AC.

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“…In an attempt to explore alternative use of date seeds, researchers have examined the sorption ability of date seeds 17,18 . Also, due to elevated lignocellulose composition, date seeds were identified as an efficient feedstock for activated carbon 19,20 . Bouchelta et al 21 identified that dateseeds constitutes majorly cellulose (42%), followed by hemicellulose (25%), and lignin (11%).…”

Section: Introductionmentioning

confidence: 99%

Single and competitive sorption potential of date seed‐derived biochar during removal of lead (II) and cadmium (II) ions

Saravanakumar

Prasad²,

Senthilkumar

et al. 2021

Env Prog and Sustain Energy

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The current research was performed to examine the effects of date seed‐derived biochar (DSDB) for remediation of hazardous metal ions (lead (II) and cadmium (II)) from binary and single systems. The maximum sorption uptakes of 0.484 and 0.798 mmol/g were recorded for lead (II) and cadmium (II) ions, respectively, at an equilibrium pH of 4.5. For both metal ions, DSDB produced quick kinetic uptake rates with most of the removal process (90%) completed within 60 mins. Different types of models were applied to depict lead (II) and cadmium (II) isotherms (Toth, Redlich–Peterson, Freundlich, and Langmuir) and kinetics (pseudo‐first and ‐second order) data. Desorption method was attempted and DSDB was reutilized in five consecutive cycles successfully using 0.01 M HCl as elutant. During binary sorption, decreased uptake of cadmium (II) by DSDB was observed due to the presence of lead (II). In comparison to single solute system, the uptake of cadmium (II) was reduced to 26.5% while only 1.2% reduction for lead (II) was observed. While comparing the two multi‐component isotherm models (Langmuir and Freundlich), the multicomponent Langmuir model performed well in describing the cadmium (II)+lead (II) binary isotherm with high accuracy.

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Equilibrium and thermodynamic study of cobalt adsorption on activated carbon derived from date seeds

Cited by 8 publications

References 30 publications

Coal-based granular activated carbon loaded with MnO₂as an efficient adsorbent for removing formaldehyde from aqueous solution

Coal-based granular activated carbon loaded with MnO₂as an efficient adsorbent for removing formaldehyde from aqueous solution

Adsorption of methanol from methanol–water mixture by activated carbon and its regeneration using photo-oxidation process

Single and competitive sorption potential of date seed‐derived biochar during removal of lead (II) and cadmium (II) ions

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Equilibrium and thermodynamic study of cobalt adsorption on activated carbon derived from date seeds

Cited by 8 publications

References 30 publications

Coal-based granular activated carbon loaded with MnO2as an efficient adsorbent for removing formaldehyde from aqueous solution

Coal-based granular activated carbon loaded with MnO2as an efficient adsorbent for removing formaldehyde from aqueous solution

Adsorption of methanol from methanol–water mixture by activated carbon and its regeneration using photo-oxidation process

Single and competitive sorption potential of date seed‐derived biochar during removal of lead (II) and cadmium (II) ions

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Coal-based granular activated carbon loaded with MnO₂as an efficient adsorbent for removing formaldehyde from aqueous solution

Coal-based granular activated carbon loaded with MnO₂as an efficient adsorbent for removing formaldehyde from aqueous solution