Adsorption of Reactive blue 21 onto functionalized cellulose under ultrasonic pretreatment: Kinetic and equilibrium study

Ma, Qianyun; Lijuan, Wang

doi:10.1016/j.jtice.2014.12.018

Cited by 30 publications

(13 citation statements)

References 34 publications

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“…PPAC through electron exchange or sharing. Interestingly, results obtained from similar studies performed on the adsorption of MB employing other adsorbents are also consistence with the results in this research [16,34,36].…”

Section: Modelssupporting

confidence: 90%

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Facile preparation of porous activated carbon under ultrasonic assistance for the Methylene blue removal from aqueous environment: characterization, isothermal, kinetic and thermodynamic studies

Eslami

Khosravi

Miri

et al. 2020

Mater. Res. Express

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Powdered Peganum Harmala activated carbon (PPAC) was synthesized by a new activation method using ultrasonic waves (with a frequency of 37 KHz for 1 h) after carbonization and application to remove methylene blue (MB) from aqueous solutions. In this experiment, the characteristics of the PPAC were examined through BET, FESEM, and FTIR spectrum. The effects of the initial pH (2-12), the adsorbent's dose (0.5-4 g L −1 ), reaction time (2-80 min), initial concentration of the dye (50-300 mg l −1 ), mixing rate (0-300 rpm), and the solution's temperature (10°C-50°C) in adsorption process were investigated. The results indicated that ultrasonic waves have the significant effect on the carbon activating process. BET analysis indicated that the specific surface area of PPAC before activation was 0.776 m 2 g −1 and had increased to 442.14 m 2 g −1 following activation by ultrasonic waves. FESEM images showed that significant elevation of the porosity level and development of numerous pores in the activated carbon. FTIR analysis indicates that following the activation, -OH groups have been developed onto the PPAC surfaces. The adsorption isotherms and kinetics were well fitted by the Freundlich and pseudo-second order model. Investigation of thermodynamic parameters indicated that adsorption process of MB by PPAC is spontaneous, endothermic, and physical.final concentration of methylene blue (mg l −1 ) C t MB concentrations at time t of reaction (mg l −1 ) k 1 pseudo-first order rate constant (1 min −1 ) k 2 pseudo-second order rate constant (mg (g min) −1 ) K f Freundlich adsorbent capacity (mg g −1 (l mg −1 )

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Section: Modelssupporting

confidence: 90%

“…The FTIR spectra for PPC and PPAC are shown in figure 3. The most important bands in PPAC have been developed at 3648 and 3432 cm −1 , suggesting liberated and bonded (-OH) hydroxyl [34,35]. The next band has been developed at 2360 cm −1 , which is related to C-H groups [36].…”

Section: Resultsmentioning

confidence: 95%

Facile preparation of porous activated carbon under ultrasonic assistance for the Methylene blue removal from aqueous environment: characterization, isothermal, kinetic and thermodynamic studies

Eslami

Khosravi

Miri

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Langmuir isotherm model is based on the assumption of a monolayer adsorption on a surface with a finite number of identical sites, where all sites are energetically equivalent and there is no interaction between adsorbed molecules. The experimental data best fit with the Langmuir isotherm implicating that the surface of the used adsorbent in the removal of MG is homogeneous [36,37]. The linear regression coefficient (R 2 ) alone cannot be utilized as a meaningful comparison of models.…”

Section: Adsorption Isothermsmentioning

confidence: 97%

“…The deviation of plots can be due to differences in mass transfer during the initial and final stages of the adsorption [39]. In addition, decreasing the slope from the step 1 to step 2 at each initial MG concentration indicates that the Intra-particle diffusion of MG molecules to the pores was the rate-limiting step in the adsorption process on the SPM [36].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Malachite green removal using modified sphagnum peat moss as a low-cost biosorbent: Kinetic, equilibrium and thermodynamic studies

Hemmati

Norouzbeigi

Sarbisheh

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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“…The value of G 0 at all investigated temperatures was negative and was decreased with temperature increasing. This implied the spontaneous nature of the adsorption processes and improve temperature would be in favor of the adsorption [36,37] . The similar experiment phenomenon was also present in the arsenate adsorption on palygorskite nanocomposites modified alumina and MA [38] .…”

Section: Thermodynamic Studymentioning

confidence: 99%

Adsorption performance and mechanism of As(V) uptake over mesoporous Y–Al binary oxide

Han

Hang

Chen

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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Adsorption of Reactive blue 21 onto functionalized cellulose under ultrasonic pretreatment: Kinetic and equilibrium study

Cited by 30 publications

References 34 publications

Facile preparation of porous activated carbon under ultrasonic assistance for the Methylene blue removal from aqueous environment: characterization, isothermal, kinetic and thermodynamic studies

Facile preparation of porous activated carbon under ultrasonic assistance for the Methylene blue removal from aqueous environment: characterization, isothermal, kinetic and thermodynamic studies

Malachite green removal using modified sphagnum peat moss as a low-cost biosorbent: Kinetic, equilibrium and thermodynamic studies

Adsorption performance and mechanism of As(V) uptake over mesoporous Y–Al binary oxide

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