Adsorption of naphthalene onto a high-surface-area carbon from waste ion exchange resin

Shi, Qianqian; Li, Aimin; Zhu, Zhenyue; Liu, Bing

doi:10.1016/s1001-0742(12)60017-5

Cited by 46 publications

(19 citation statements)

References 31 publications

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“…This phenomenon supports that the diffusion is the rate-controlling step in the sorption process [ 60 ]. The half-adsorption time t 1/2 (min) defined as the time required for the adsorption to take up half amount of the equilibrium metal ions was found within the range of 0.54 to 4.03 indicating high affinity between the adsorbate and adsorbent molecules [ 61 ].…”

Section: Resultsmentioning

confidence: 99%

Heavy Metal Adsorption ontoKappaphycussp. from Aqueous Solutions: The Use of Error Functions for Validation of Isotherm and Kinetics Models

Rahman

Sathasivam

2015

BioMed Research International

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Biosorption process is a promising technology for the removal of heavy metals from industrial wastes and effluents using low-cost and effective biosorbents. In the present study, adsorption of Pb2+, Cu2+, Fe2+, and Zn2+ onto dried biomass of red seaweed Kappaphycus sp. was investigated as a function of pH, contact time, initial metal ion concentration, and temperature. The experimental data were evaluated by four isotherm models (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich) and four kinetic models (pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models). The adsorption process was feasible, spontaneous, and endothermic in nature. Functional groups in the biomass involved in metal adsorption process were revealed as carboxylic and sulfonic acids and sulfonate by Fourier transform infrared analysis. A total of nine error functions were applied to validate the models. We strongly suggest the analysis of error functions for validating adsorption isotherm and kinetic models using linear methods. The present work shows that the red seaweed Kappaphycus sp. can be used as a potentially low-cost biosorbent for the removal of heavy metal ions from aqueous solutions. Further study is warranted to evaluate its feasibility for the removal of heavy metals from the real environment.

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Section: Resultsmentioning

confidence: 99%

Heavy Metal Adsorption ontoKappaphycussp. from Aqueous Solutions: The Use of Error Functions for Validation of Isotherm and Kinetics Models

Rahman

Sathasivam

2015

BioMed Research International

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“…Therefore, alcohol treatment is a good choice for the regeneration of naphthalene-exhausted MCAC-500 W. Shi et al observed that naphthalene adsorption onto a high-surface-area carbon has high capacity after three cycles by the alcohol treatment for the regeneration of the spent carbon [37].…”

Section: Regenerationmentioning

confidence: 99%

Adsorption of naphthalene from aqueous solution on coal-based activated carbon modified by microwave induction: Microwave power effects

Tian

et al. 2015

Chemical Engineering and Processing: Process Intensification

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To remove polycyclic aromatic hydrocarbons effectively, coal-based activated carbon (CAC) was produced by various microwave power modification. Original and modified CAC (MCACs) were characterized by N2 adsorption method, scanning electron microscopy, X-ray photoelectron spectroscopy, Boehm method, and point of zero charge determination. Their adsorption behavior of naphthalene was also investigated. Adsorption equilibrium isotherms, adsorption kinetics, and thermodynamics of naphthalene adsorption on CAC and MCACs were generated. Microwave modification enhanced the basic surface groups of MCACs, extended their Brunauer-Emmett-Teller surface area and pore volume, and varied their distribution of surface oxygen groups. Surface area, pore volume, and functional groups of MCACs were positively related to their naphthalene-adsorption capacity.The adsorption equilibrium of naphthalene on CAC and MCACs needed only 40 min, and this adsorption was fast. Adsorption isotherms revealed that the Freundlich model was applicable to the adsorption process. The adsorption kinetics of naphthalene onto adsorbents was described by pseudo-second-order kinetic model. Naphthalene adsorption was found to a spontaneous and exothermal adsorption process. All these results showed that microwave radiation was an efficient and rapid method of modifying activated carbons. Moreover, MCACs was a promising low-cost and fast adsorbent that can be used to remove naphthalene from aqueous solutions.

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“…With the increase of pH value in the solution from 7 to 11, the concentration of H + and the dissolved action of acid in the solution decreased gradually; thus, the surface of MBC could provide much more adsorption sites so as to improve the adsorption capacity of PHE. This showed that the molecules of PHE might have adsorbed on BC and MBC mainly via the hydrophobic partitioning interaction [ 29 ], not electrostatic action. BC and MBC both showed high removal rates for PHE at a pH of 7.…”

Section: Resultsmentioning

confidence: 99%

Sorptive removal of phenanthrene from aqueous solutions using magnetic and non-magnetic rice husk-derived biochars

Guo

Wang

et al. 2018

R. Soc. open sci.

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A magnetically modified rice husk biochar (MBC) was successfully prepared by a hydrothermal method from original biochar (BC) and subsequently used to remove phenanthrene (PHE) from aqueous solutions. The porosity, specific surface area and hydrophobicity of BC were significantly improved (approx. two times) after magnetic modification. The adsorption data fitted well to pseudo-second-order kinetic and Langmuir models. Compared with BC, MBC had a faster adsorption rate and higher adsorption capacity of PHE. The adsorption equilibrium for PHE on MBC was achieved within 1.0 h. The maximum adsorption capacity of PHE on MBC was 97.6 mg g−1 based on the analysis of the Sips model, which was significantly higher than that of other sources of BCs. The adsorption mechanism of the two BCs was mainly attributed to the action of surface functional groups and π–π-conjugated reactions. The adsorption of PHE on MBC mainly occurred in the functional groups of C–O and Fe3O4, but that on BC was mainly in the functional groups of –OH, N–H, C=C and C–O.

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Adsorption of naphthalene onto a high-surface-area carbon from waste ion exchange resin

Cited by 46 publications

References 31 publications

Heavy Metal Adsorption ontoKappaphycussp. from Aqueous Solutions: The Use of Error Functions for Validation of Isotherm and Kinetics Models

Heavy Metal Adsorption ontoKappaphycussp. from Aqueous Solutions: The Use of Error Functions for Validation of Isotherm and Kinetics Models

Adsorption of naphthalene from aqueous solution on coal-based activated carbon modified by microwave induction: Microwave power effects

Sorptive removal of phenanthrene from aqueous solutions using magnetic and non-magnetic rice husk-derived biochars

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