Platinum(IV) Chloride Complex Ions Adsorption on Activated Carbon Organosorb 10CO

2017 ◽  
Vol 70 (7) ◽  
pp. 769 ◽  
Author(s):  
Marek Wojnicki ◽  
Ewa Rudnik ◽  
Robert P. Socha ◽  
Krzysztof Fitzner
Keyword(s):  
Activated Carbon ◽  
Photoelectron Spectroscopy ◽  
Kinetic Studies ◽  
Reaction Model ◽  
Chloride Complex ◽  
Complex Ions ◽  
Spectrophotometric Methods ◽  
The Individual ◽  
Adsorption Desorption ◽  
Platinum Recovery

Kinetic studies on the recovery of platinum(iv) chloride complex ions from acidic solutions using commercially available activated carbon (AC) were carried out using spectrophotometric methods. The overall process obeyed first-order reaction model. The overall process is complex and consists of two steps: the first one is related to the reversible adsorption–desorption of PtIV complex and the second one is related to the reduction of PtIV complex on the AC surface. The first step of the overall process was limited by diffusion, whereas the second step ran under kinetic control. The activation energies of the individual reactions in both steps were determined and corresponded to 18.27, 7.85, and 31.2 kJ mol–1 for the adsorption, desorption, and reduction reactions, respectively. X-ray photoelectron spectroscopy results confirmed that the chemical reaction was related to the reduction of PtIV to PtII on the AC surface. The results show that the investigated AC can be applied for platinum recovery from highly diluted aqueous systems.

scholarly journals Spectrophotometric Analysis of the Kinetic of Pd(II) Chloride Complex Ions Sorption Process from Diluted Aqua Solutions Using Commercially Available Activated Carbon

2017 ◽  
Vol 62 (4) ◽  
pp. 2405-2411 ◽  
Author(s):  
M. Wojnicki
Keyword(s):  
Activated Carbon ◽  
Kinetic Model ◽  
Thermodynamic Parameters ◽  
Kinetic Studies ◽  
Sorption Process ◽  
Spectrophotometric Analysis ◽  
Chloride Complex ◽  
Adsorption Kinetic ◽  
Complex Ions ◽  
Process Kinetic

AbstractIn this paper, results of adsorption kinetic studies of Pd(II) chloride complex ions on activated carbon Organosrob 10 CO are presented. Spectorphotometrical method was applied to investigate the process. Kinetic model was proposed, and fundamental thermodynamic parameters were determined. Proposed kinetic model describes well observed phenomenon in the studied range of concentration of Pd(II) chloride complex ions as well, as concentration of activated carbon.

Kinetic Studies of Gold Recovery from Diluted Chloride Aqueous Solutions Using Activated Carbon Organosorb 10 CO

2016 ◽  
Vol 69 (3) ◽  
pp. 254 ◽  
Author(s):  
Marek Wojnicki ◽  
Ewa Rudnik ◽  
Magdalena Luty-Błocho ◽  
Robert P. Socha ◽  
Zbigniew Pędzich ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Acidic Solution ◽  
Activation Parameters ◽  
Kinetic Studies ◽  
Reaction Model ◽  
Surface Functional Groups ◽  
Complex Ions ◽  
First Order ◽  
Material Theory

The kinetic studies of gold(iii) chloride complex ions recovery from acidic solution using activated carbon (AC) were carried out using spectrophotometry. AC samples were characterized in terms of surface area, porosity, and zeta potential. The surface functional groups were also identified. It was found that adsorption of AuCl4– onto AC was followed by reduction of the ions to the metallic form. The process obeyed the first order reaction model, but the reaction was controlled by diffusion. Arrhenius and Eyring–Polanyi equations were used for determination of the activation parameters. Distribution of gold across the AC pellets was also determined and discussed according to the porous material theory.

Kinetic studies of sorption and reduction of gold(III) chloride complex ions on activated carbon Norit ROX 0.8

2015 ◽  
Vol 29 ◽  
pp. 289-297 ◽  
Author(s):  
Marek Wojnicki ◽  
Magdalena Luty-Błocho ◽  
Robert P. Socha ◽  
Krzysztof Mech ◽  
Zbigniew Pędzich ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Kinetic Studies ◽  
Chloride Complex ◽  
Complex Ions

scholarly journals Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

2017 ◽  
Vol 120 (2) ◽  
pp. 715-734 ◽  
Author(s):  
Marek Wojnicki ◽  
Robert P. Socha ◽  
Magdalena Luty-Błocho ◽  
Krzysztof Fitzner
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies ◽  
Chloride Complex ◽  
Complex Ions

Adsorption and reduction of platinum(IV) chloride complex ions on activated carbon

2013 ◽  
Vol 23 (4) ◽  
pp. 1147-1156 ◽  
Author(s):  
Marek WOJNICKI ◽  
Krzysztof PACŁAWSKI ◽  
Robert P. SOCHA ◽  
Krzysztof FITZNER
Keyword(s):  
Activated Carbon ◽  
Chloride Complex ◽  
Complex Ions

scholarly journals Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid Solutions

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 630
Author(s):  
Lorena Alcaraz ◽  
Dayana Nathaly Saquinga ◽  
Francisco J. Alguacil ◽  
Esther Escudero ◽  
Félix A. López
Keyword(s):  
Activated Carbon ◽  
Kinetic Studies ◽  
Nitrogen Adsorption ◽  
Liquid Solution ◽  
Physical Activation ◽  
Solution Ph ◽  
Sem Images ◽  
Spent Coffee Ground ◽  
Liquid Solutions ◽  
Adsorption Desorption

A process aimed at the recovery of terbium from liquid solutions using activated carbon (AC) derived from spent coffee grounds (SCG) was assessed. AC was obtained using the hydro-alcoholic treatment of SCG, followed by the physical activation of the as-obtained product. The AC exhibited both microporous and mesoporous structures, which were shown by the corresponding nitrogen adsorption–desorption isotherms and scanning electron microscopy (SEM) images. In addition, a certain graphitic character was found in the micro-Raman measurements. By use of this AC, terbium adsorption was investigated, and the influence of solution pH, temperature, and the adsorbent amount on terbium uptake was tested. In addition, adsorption isotherms and kinetic studies were also evaluated. The best fit was found for the type-1 Langmuir isotherm and pseudo-second-order kinetics model. Thermodynamic studies revealed that terbium adsorption is an endothermic and spontaneous process. Terbium desorption by the use of acidic solutions was also investigated. This work demonstrated that it is possible to recover this valuable metal from liquid solution using the present AC.

scholarly journals CdS Loaded Activated Carbon: An Efficient, Solar Light Driven Photocatalyst for RhB Dye Degradation

2019 ◽  
Vol 35 (3) ◽  
pp. 1037-1044
Author(s):  
Sagar Kande ◽  
Udhav Ghoshir ◽  
Jayshree Khedkar ◽  
Anil Gambhire
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Activated Carbon ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Dye Degradation ◽  
Xrd Analysis ◽  
Band Gap Energy ◽  
X Ray ◽  
Adsorption Desorption

A series of novel photocatalyst with CdS loaded on activated carbon (xAC/CdS) were successfully synthesized by a simple hydrothermal method. The activated carbon content was varied between 0-7 wt. %. The prepared photocatalysts were characterized by X-ray diffraction, scanning electron microscopy with EDX, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy, N2 adsorption-desorption analysis and photoluminescence spectroscopy. The photocatalytic activity of as-synthesized photocatalysts was studied for RhB dye degradation under natural sunlight irradiation. XRD analysis assigned both cubic and hexagonal morphology for xAC/CdS photocatalysts. The UV-vis DRS studies showed that loading of CdS on activated carbon enhances its visible light absorption with decrease in band gap energy. The lowest photoinduced e/h pair recombination rate in 3wt% AC/CdS results in optimum photocatalytic activity as revealed by photoluminescence study. The enhancement in dye degradation ability (̴ 11 times) of prepared photocatalysts can be attributed to synergistic effect of CdS and activated carbon.

scholarly journals Studies of adsorption kinetics and regeneration of aniline, phenol, 4-chlorophenol and 4-nitrophenol by activated carbon

2013 ◽  
Vol 19 (2) ◽  
pp. 195-212 ◽  
Author(s):  
S. Suresh ◽  
V.C. Srivastava ◽  
I.M. Mishra
Keyword(s):  
Activated Carbon ◽  
Thermal Desorption ◽  
Kinetic Studies ◽  
Order Model ◽  
Heating Value ◽  
High Heating Value ◽  
Ftir Spectral Analysis ◽  
Pseudo Second Order ◽  
Adsorption Desorption ◽  
Desorption Cycle

The present paper reports kinetic studies of the adsorption of aniline (AN), phenol (P), 4-chlorophenol (CP) and 4-nitrophenol (NP) from aqueous solution onto granular activated carbon (GAC). In FTIR spectral analysis, the transmittance of the peaks gets increased after the loading of AN, P, CP and NP signifying the participation of these functional groups in the adsorption and it seems that the adsorption of AN, P, CP and NP is chemisorptive in nature. The rates of adsorption were found to obey a pseudo-second order model and that the dynamics of AN, P, CP and NP adsorption are controlled by a combination of surface and pore diffusion. The diffusion coefficient were of the order of 10-10 m2 s-1. Thermal desorption at 623 K was found to be more effective than solvent desorption. GAC performed well for at least five adsorption-desorption cycle, with continuous decrease in adsorption efficiency after each thermal desorption. Owing to its relative high heating value, the spent GAC can be used as co-fuel for the production of heat in a boiler or a furnace.

scholarly journals Pectin/Activated Carbon-Based Porous Microsphere for Pb2+ Adsorption: Characterization and Adsorption Behaviour

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2453
Author(s):  
Ri-si Wang ◽  
Ya Li ◽  
Xi-xiang Shuai ◽  
Rui-hong Liang ◽  
Jun Chen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Profile Analysis ◽  
Removal Rate ◽  
Physical Adsorption ◽  
Kinetic Studies ◽  
Maximum Adsorption Capacity ◽  
Texture Profile ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Adsorption Desorption

The development of effective heavy metal adsorbents has always been the goal of environmentalists. Pectin/activated carbon microspheres (P/ACs) were prepared through simple gelation without chemical crosslinking and utilized for adsorption of Pb2+. Scanning electron microscopy (SEM) revealed that the addition of activated carbon increased the porosity of the microsphere. Texture profile analysis showed good mechanical strength of P/ACs compared with original pectin microspheres. Kinetic studies found that the adsorption process followed a pseudo-second-order model, and the adsorption rate was controlled by film diffusion. Adsorption isotherms were described well by a Langmuir isotherm model, and the maximum adsorption capacity was estimated to be 279.33 mg/g. The P/ACs with the highest activated carbon (P/AC2:3) maintained a removal rate over 95.5% after 10 adsorption/desorption cycles. SEM-energy-dispersive X-ray spectrum and XPS analysis suggested a potential mechanism of adsorption are ion exchange between Pb2+ and Ca2+, electronic adsorption, formation of complexes, and physical adsorption of P/ACs. All the above results indicated the P/ACs may be a good candidate for the adsorption of Pb2+.

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