Evaluation of activated carbon and bio-polymer modified activated carbon performance for palladium and platinum removal

Sharififard, Hakimeh; Soleimani, Mansooreh; Ashtiani, Farzin Zokaee

doi:10.1016/j.jtice.2012.04.007

Cited by 85 publications

(29 citation statements)

References 43 publications

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“…13: where F (=q t /q e ) is the fractional attainment of equilibrium at time t, and k fd (1/min) is the liquid film diffusion rate constant [40]. The plots of -ln(1 − F) versus t ( Figure 18) did not pass through the origin, which suggested that the liquid film diffusion was not the sole rate controlling step [71]. The deviation of the liquid film plots from the origin might be attributed to high speed agitation during experimentation.…”

Section: Kinetics Studiesmentioning

confidence: 99%

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Khan¹,

Shahjahan²,

Khan

2018

Env Prog and Sustain Energy

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Adsorptive removal of cationic dyes such as methyl violet (MV) and methyl green (MG) from aqueous solution using magnetic iron‐manganese oxide coated graphene oxide (IMGO) was examined. The IMGO was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X‐ray spectroscopy, X‐ray diffraction (XRD), N2 adsorption–desorption isotherm, and vibrating sample magnetometer. The effect of different process parameters such as contact time, IMGO dose, initial dyes concentration, initial solutions pH, and temperature was investigated. The equilibrium experimental data were fitted with Langmuir, Freundlich, Dubinin–Radushkevich (D‐R), and Temkin isotherm models. The data fitted well with Freundlich isotherm model suggesting multilayer adsorption of dyes onto heterogeneous adsorbent surface. The Langmuir adsorption capacity (Qm, mg/g) of IMGO with MV and MG was 172.96 and 195.64, respectively. The data obeyed the pseudo‐second order kinetic model, and the mechanism of adsorption was controlled by both intra‐particle and liquid film diffusion models. The adsorption process was found to be spontaneous, endothermic, and physical in nature. The dye‐loaded IMGO was regenerated and used for at least four cycles without any substantial loss of its efficacy. The present adsorptive removal studies of MV and MG revealed that IMGO is an effective and efficient adsorbent for the removal of basic dyes from aquatic system. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S214–S229, 2019

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Section: Kinetics Studiesmentioning

confidence: 99%

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Khan¹,

Shahjahan²,

Khan

2018

Env Prog and Sustain Energy

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“…In general, chitosanbased sorbents, which bear amine groups, have higher binding affinity than other sorbents. Alginate and AB discs show comparable (slightly higher) sorption levels with activated carbons [51], and much better than Fe 3 O 4 nano-particles [52], melamine-formal dehyde-thiourea chelating resin [46], and aminated lignin [53], while AB/PEI discs present similar sorption capacity with ethylenediamine-modified chitosan nanoparticles [54], and thiourea-modified chitosan microspheres [43]. Compared to chitosan or alginate, algal biomass-based sorbents are much more environmentally friendly.…”

Section: Sorption Isothermsmentioning

confidence: 99%

Innovative conditioning of algal-based sorbents: Macro-porous discs for palladium sorption

Wang

Vincent

Roux

et al. 2017

Chemical Engineering Journal

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“…In particular, platinum group metals (PGMs), i.e. platinum (Pt(IV)) and palladium (Pd(II)), are applied in various industries, including chemical processes [2]. This suggests that PGMs are very important natural resources.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Pt(IV) and Pd(II) from Aqueous Solution by Calcined Gibbsite (Aluminum Hydroxide)

Ogata

Inoue

Tominaga

et al. 2013

e-J. Surf. Sci. Nanotechnol.

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In the present study, calcined gibbsite (GB) was prepared by calcination treatment between 200 and 1000 • C (GB200-GB1000). The properties of GBs (i.e., the amount of hydroxyl groups, specific surface area, mean pore diameter, and pore volume) were evaluated. GB400 had the highest amount of hydroxyl groups (0.46 mmol/g), as well as the highest specific surface area (295.3 m 2 /g) and micropore volume (0.036 mL/g). It also provided the highest amount of the adsorbed Pt(IV) and Pd(II), which suggests that the adsorption of Pt(IV) and Pd(II) onto GB is related to the amount of hydroxyl groups, specific surface area, and micropore volume. The optimal pH values for the adsorption of Pt(IV) and Pd(II) onto GB400 were 4.5-5.0 and about 6.0, respectively. The equilibrium adsorption of both cations onto GB400 was reached within 30 min. Moreover, the experimental data of the adsorption of Pt(IV) and Pd(II) onto GB400 was fitted by pseudo-second-order model (r = 0.997-0.999) and the Langmuir equation (r = 0.934-0.953). The calculated thermodynamic parameters ∆G, ∆H, and, ∆S indicate that the adsorption of Pt(IV) onto GB400 is feasible, spontaneous, and exothermic. In addition, the amount of Pt(IV) and Pd(II) adsorbed onto GB400 decreased with increasing chloride ion concentration.

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Evaluation of activated carbon and bio-polymer modified activated carbon performance for palladium and platinum removal

Cited by 85 publications

References 43 publications

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Innovative conditioning of algal-based sorbents: Macro-porous discs for palladium sorption

Adsorption of Pt(IV) and Pd(II) from Aqueous Solution by Calcined Gibbsite (Aluminum Hydroxide)

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