Equilibrium and Kinetic Studies of Phenol Sorption by Chitosan Coated Montmorillonite

Yan, Jinlong; Quan, Guixiang

doi:10.4067/s0717-97072009000100017

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…Conditions: solution pH=7.0; temperature=25°C; biosorbent concentration=1 g/L ). The L-type isotherm generally reflects the occurrence of chemisorption (Yan and Quan 2009), which is consistent with the results from the kinetic studies described above. In this work, the Langmuir and Freundlich isotherm models were used to simulate the Ni(II) biosorption isotherm.…”

Section: Kinetic Modeling Of Ni(ii) Biosorption Processsupporting

confidence: 84%

Nickel(II) biosorption from aqueous solutions by shrimp head biomass

Hernández-Estévez

Cristiani‐Urbina

2014

Environ Monit Assess

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The present study evaluates the capacity of shrimp (Farfantepenaeus aztecus) head to remove toxic Ni(II) ions from aqueous solutions. Relevant parameters that could affect the biosorption process, such as shrimp head pretreatment, solution pH level, contact time and initial Ni(II) concentration, were studied in batch systems. An increase in Ni(II) biosorption capacity and a reduction in the time required to reach Ni(II) biosorption equilibrium was manifested by shrimp head biomass pretreated by boiling in 0.5 N NaOH for 15 min; this biomass was thereafter denominated APSH. The optimum biosorption level of Ni(II) ions onto APSH was observed at pH 7.0. Biosorption increased significantly with rising initial Ni(II) concentration. In terms of biosorption dynamics, the pseudo-second-order kinetic model described Ni(II) biosorption onto APSH best. The equilibrium data adequately fitted the Langmuir isotherm model within the studied Ni(II) ion concentration range. According to this isotherm model, the maximum Ni(II) biosorption capacity of APSH was 104.22 mg/g. Results indicate that APSH could be used as a low-cost, environmentally friendly, and promising biosorbent with high biosorption capacity to remove Ni(II) from aqueous solutions.

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Section: Kinetic Modeling Of Ni(ii) Biosorption Processsupporting

confidence: 84%

Nickel(II) biosorption from aqueous solutions by shrimp head biomass

Hernández-Estévez

Cristiani‐Urbina

2014

Environ Monit Assess

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“…Adsorption of phenol on granular activated carbon from nutrient medium: equilibrium and kinetic study was reported by Dabhade et al [24]. Yan and Quan [25] investigated equilibrium and kinetic studies of phenol sorption by chitosan coated montmorillonite. Liquid phase adsorption of phenol by activated carbon derived from Hazelnut bagasse was studied by Karabacakoglu et al [26].…”

Section: Introductionmentioning

confidence: 99%

Removal of 2-Nitrophenol, 2,4-Dinitrophenol and 2,4,6- Trinitrophenol From Aqueous Solution Through Adsorption on Cobalt, Nickel and Tungsten Ferrocyanides

Tewari¹,

Grant²

2021

Rev. Bol. Quim.

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Los ferrocianuros de cobalto, níquel y tungsteno se sintetizaron y caracterizaron mediante estudios elementales y espectrales. Se estudió la eliminación de 2-nitrofenol, 2,4-dinitrofenol y 2,4,6-trinitrofenol de una solución acuosa mediante adsorción en ferrocianuros metálicos sintetizados en el rango de pH 1.0 - 10.0 y a una temperatura de 30 ± 1º C. La adsorción de tipo Langmuir se siguió en el rango de concentración de 10-3 M a 10-4 M para las soluciones de 2-nitrofenol, 2,4-dinitrofenol y 2,4,6-trinitrofenol. Se encontró que el 2,4,6-trinitrofenol y 2-nitrofenol tenían afinidad máxima y mínima con los tres ferrocianuros metálicos estudiados. Se encontró que los ferrocianuros de níquel y tungsteno tienen mayor y menor capacidad de adsorción con los tres fenoles sustituidos.

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“…The rapid rate of adsorption could be explained by the availability of adsorption sites in abundance at the beginning of adsorption. As the stirring was increased, the adsorption sites on the surface of the CS-based nanofibres were depleted until a saturation point (Yan and Quan, 2009). The stirring time of 150 min was then chosen as the optimum time for adsorption of 3-methyl-4-nitrophenol on CS-based nanofibres.…”

Section: The Effect Of Contact Timementioning

confidence: 99%

Electrospun chitosan-based nanofibres for removal of phenols from drinking water

Nthunya

Masheane

Malinga

et al. 2018

WSA

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Chitosan-based nanofibres were synthesized using a fibre electrospinning technique and tested for the removal of 3-methyl-4-nitrophenol from aqueous solutions. The downside of chitosan-based materials is swelling. In this study, it was found that the addition of polyisoprene not only improved the electrospinning ability of chitosan but also reduced the swelling of the nanofibres by 50%. The adsorption studies of 3-methyl-4-nitrophenol on the chitosan-based nanofibres were conducted in a batch process. The nanofibres were found to remove up to 90% of 3-methyl-4-nitrophenol with an adsorption reduction capacity of 12% at each cycle of reusability test. The reduction capacity was associated with the chemical interaction of the adsorbate and the adsorbent. This indicated that the nanofibres can effectively remove 3-methyl-4-nitrophenol from water for at least 3 cycles. The adsorption efficiency improved as the degree of cross-linking was reduced and the adsorption mechanism followed the Freundlich isotherm suggesting that the adsorption of 3-methyl-4-nitrophenol occurred in different layers on the surface of the nanofibres. The degree of crosslinking of the electrospun nanofibres with glutaraldehyde was found to affect theadsorption capacity. Nanofibres with different degrees of crosslinking were used to study the effect of pH, adsorbent dose, and initial concentration.

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Equilibrium and Kinetic Studies of Phenol Sorption by Chitosan Coated Montmorillonite

Cited by 7 publications

References 17 publications

Nickel(II) biosorption from aqueous solutions by shrimp head biomass

Nickel(II) biosorption from aqueous solutions by shrimp head biomass

Removal of 2-Nitrophenol, 2,4-Dinitrophenol and 2,4,6- Trinitrophenol From Aqueous Solution Through Adsorption on Cobalt, Nickel and Tungsten Ferrocyanides

Electrospun chitosan-based nanofibres for removal of phenols from drinking water

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