Separation of dissolved oil from aqueous solution by sorption onto acetylated lignocellulosic biomass—equilibrium, kinetics and mechanism studies

Cheu, Siew Chin; Kong, Helen; Song, Shiow Tien; Johari, Khairiraihanna; Saman, Norasikin; Yunus, Mohd Azizi Che; Mat, Hanapi

doi:10.1016/j.jece.2015.12.028

Cited by 30 publications

(16 citation statements)

References 47 publications

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“…9c, 10c) agreed with the experimental data, the parameters (Table 5), showed that R 2 > 0.99, the values β el showed that the available site for adsorption decreases with increase in dye concentrations with increasing concentration of adsorbed quantity, α el . The positive values of these constants confirmed the sorption, and hence, Elovich model properly explained the initial kinetics of adsorption of the dyes onto the adsorbent as previously reported in the literature (Vassileva et al 2013;Cheu et al 2016). The intraparticle diffusion model suggested multilinearity adsorptions, the two dyes adsorbed in a biphasic process as depicted in Figs.…”

Section: Adsorption Kineticssupporting

confidence: 86%

Magnetic tuned sorghum husk biosorbent for effective removal of cationic dyes from aqueous solution: isotherm, kinetics, thermodynamics and optimization studies

et al. 2019

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Dyes containing effluents constitute hazards to the environments and endanger human and aquatic lives. Although activated charcoal has been adjudged the best for adsorption treatment of wastewater, its regeneration and high cost have limited their applications, hence the quest for alternative adsorbent. Magnetic tuned biosorbent was prepared from sorghum husks by in situ co-precipitation of Fe 3 O 4 . It was characterized using Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy and scanning electron microscopy. The biosorbent was then used for the removal of crystal violet (CV) and methylene blue (MB) dyes from aqueous solutions in a batch process. The effects of temperature, initial dye concentration, dosage, contact time as well as pH were investigated, and data obtained were analysed with appropriate kinetic and isotherm models. Response surface method was used for the optimization study of the adsorption using Box-Behnken experimental design. Pseudo-second-order kinetic model was the most appropriate model for both dyes with correlation coefficient (R 2 ) > 0.9 and low % standard error values. The equilibrium data were best fitted with Langmuir isotherm with maximum adsorption capacity (Q max ) of 18.87 and 30.00 mg g −1 for CV and MB, respectively. The thermodynamic parameters for the adsorption processes showed that it was spontaneous, endothermic and random systems with free energy changes less than zero, enthalpy changes (∆H) of + 49.81 and + 51.18 kJ mol −1 , entropy changes (∆S) of + 178.39 and + 177.34 J mol −1 K −1 for MB and CV dyes, respectively. Optimization studies revealed that 95% of the dyes are removable at 1.0 g adsorbent dosage and pH of 4.05 at 50 °C with initial dye concentration of 50 mg L −1 . The prepared adsorbent is cheap, easily recycled and highly effective for the treatment of dye-contaminated water.

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Section: Adsorption Kineticssupporting

confidence: 86%

Magnetic tuned sorghum husk biosorbent for effective removal of cationic dyes from aqueous solution: isotherm, kinetics, thermodynamics and optimization studies

et al. 2019

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“…These results imply that chemisorption phenomena may be the rate‐controlling factors on the oil sorption . Furthermore, according to the pseudo‐second order kinetics affinity, it is possible to asses that the occupation rate of binding sites suitable to interact with sorbed oils is proportional to the square number of not occupied active sites on sorbing surfaces …”

Section: Resultsmentioning

confidence: 93%

“…Finally, a plateau can be observed when the equilibrium conditions are reached. In this stage, only a very slight increase in the sorption capacity occurs due to the reduced sorbent surfaces available for oil entrapment …”

Section: Resultsmentioning

confidence: 99%

“…At the same time [Figure (a2)], a chemical phenomenon needs to be taken into account considering that more reactive sites in the foams are free to interact with pollutant. The interactions of oil molecules with sorbent substrate can be either due to physical (van der Waals forces between sorbate molecules and sorbent surface) and/or chemical interactions (involving the electron transfer between sorbates and sorbents) . Consequently, in this stage, the oil sorption rate is controlled by combined physical and chemical mechanisms.…”

Section: Resultsmentioning

confidence: 99%

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Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Piperopoulos

Calabrese

Mastronardo

et al. 2018

J of Applied Polymer Sci

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Sorption kinetics of pollutant oils, such as kerosene, virgin naphtha, crude oil, and pump oil, into porous siloxanic foams filled with carbon nanotubes (CNTs) are investigated. Both, pristine and functionalized, CNTs are used as foam fillers. Among all, the foam filled with pristine CNT shows a poor affinity with water and high sorption rate in light oils, in which it achieves the highest absorption values (7991 mg g−1 after 660 s and 6685 mg g−1 after 420 s, respectively, in virgin naphtha and kerosene). The kinetic data are described by the pseudo‐first order, pseudo‐second order, Elovich and intraparticle diffusion models. Results show that chemisorption processes are rate limiting the sorption step. In fact, pseudo‐second order model better represents the equilibrium isotherm data. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47374.

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“…Finally, the pollutant uptake reaches a plateau, due to a stabilization of the sorption capacity, where an equilibrium condition occurs. In this stage, only a very limited increase in the sorption capacity takes place due to the reduced active sorbent sites available in the bulk and surface of the AD fibers for oil sorption and entrapment [31].…”

Section: IIImentioning

confidence: 99%

Assessment of Arundo donax Fibers for Oil Spill Recovery Applications

Fiore

Piperopoulos

Calabrese

2019

Fibers

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In the last years, natural fibers are increasingly investigated as an oil recovery system in order to overcome the oil spillage phenomena, thus preserving environment and aquatic life. In particular, lignocellulose-based fibers have recently been employed with promising results. In such a context, the aim of this paper is to assess the oil sorption capability of natural fibers extracted from the stem of the giant reed Arundo donax L., a perennial rhizomatous grass belonging to the Poaceae family that grows naturally all around the world thanks to its ability to tolerate different climatic conditions. Sorption tests in several pollutants and water as a reference were carried out. The fibers have absorption capacities that are about five to six times their weight. Depending on the high absorption kinetics, possible applicative interests can be identified. Eventually, depending on the fiber size, adsorption properties were related to the microstructure and morphology of Arundo donax fibers.

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Separation of dissolved oil from aqueous solution by sorption onto acetylated lignocellulosic biomass—equilibrium, kinetics and mechanism studies

Cited by 30 publications

References 47 publications

Magnetic tuned sorghum husk biosorbent for effective removal of cationic dyes from aqueous solution: isotherm, kinetics, thermodynamics and optimization studies

Magnetic tuned sorghum husk biosorbent for effective removal of cationic dyes from aqueous solution: isotherm, kinetics, thermodynamics and optimization studies

Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Assessment of Arundo donax Fibers for Oil Spill Recovery Applications

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