scholarly journals Fast Removal of Co2+ and Ni2+ from Aqueous Solution Using Partial Carbonized Nanoporous Resin

2015 ◽  
Vol 10 (3) ◽  
pp. 729-737
Author(s):  
Imed Ghiloufi
Keyword(s):  
Electron Microscopy ◽  
Metal Ion ◽  
Sol Gel ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Effective Parameters ◽  
Order Kinetic Model ◽  
Adsorption Of Co2 ◽  
Organic Xerogel

Partial carbonized nanoporous resin (PCNR-150), based on organic xerogel compounds, was prepared at 150 ºC by sol–gel method from pyrogallol and formaldehyde mixtures in water using perchloric acid as catalyst. The PCNR-150 was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transformed infrared spectroscopy (FTIR) and nitrogen porosimetry. The metal uptake characteristics were explored using well-established and effective parameters including pH, contact time, initial metal ion concentration, and temperature. Optimum adsorptions of Co2+ and Ni2+, using PCNR-150 as adsorbent, were observed at pH 5 and 7, respectively. Langmuir model gave a better fit than the other models, and kinetic studies revealed that the adsorption is fast and its data are well fitted by the pseudo-second-order kinetic model and thermodynamic properties, i.e., ΔGo, ΔHo, and ΔSo, showed that adsorption of Co2+ and Ni2+ onto PCNR-150 was endothermic, spontaneous and feasible in the temperature range of 300–328 K.

Partial carbonized nanoporous resin for uptake of lead from aqueous solution

2015 ◽  
Vol 72 (6) ◽  
pp. 974-982 ◽  
Author(s):  
I. Ghiloufi ◽  
A. S. AL-Hobaib ◽  
L. El Mir
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Metal Ion ◽  
Picric Acid ◽  
Sol Gel ◽  
The Other ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Effective Parameters ◽  
Lead Uptake

Four partial carbonized nanoporous resins (PCNRs), based on organic xerogel compounds, were synthesised by the sol–gel method from pyrogallol and formaldehyde mixtures in water using picric acid as catalyst. The PCNRs were prepared at different pyrolysis temperatures: T1 = 200 °C (PF-200), T2 = 300 °C (PF-300), T3 = 400 °C (PF-400), or T4 = 500 °C (PF-500). The PCNRs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transformed infrared spectroscopy, and nitrogen porosimetry. The obtained results show that PF-200 is more efficient for the removal of Pb2+ from aqueous solution than the other adsorbent prepared in this study. The characteristics of lead uptake by PF-200 were explored using well-established and effective parameters including pH, contact time, initial metal ion concentration and temperature. Optimum adsorption of Pb2+, using PF-200, was observed at pH 4.5. The Langmuir model gave a better fit than the other models, and kinetic studies revealed that the adsorption was well fitted by the pseudo second-order kinetic model and thermodynamic properties, i.e., Gibbs free energy change, enthalpy change and entropy change, showed that adsorption of Pb2+ onto PF-200 was endothermic, spontaneous and feasible in the temperature range of 298–328 K.

Equilibrium and Kinetic Studies of Copper Metal Ion Biosorption by Flavobacterium sp. as a Low-Cost Natural Biosorbent

2011 ◽  
Vol 322 ◽  
pp. 436-439 ◽  
Author(s):  
Xi Chan Zhang ◽  
Xing Guang Li
Keyword(s):  
Metal Ion ◽  
Binding Capacity ◽  
Low Cost ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Equilibrium Studies ◽  
Initial Ph ◽  
Order Kinetic Model ◽  
Pseudo Second Order

Present study deals with the evaluation of biosorptive removal of copper byFlavobacterium sp.Experiments have been carried out to find the effect of various parameters such as initial pH, contact time and initial metal ion concentration. Adsorption equilibrium studies showed that Cu(II) adsorption data followed the Langmuir model, the maximum binding capacity ofwas 55.20 mg/g at pH 6.0. Kinetics of copper biosorption by Flavobacterium sp. biomass is better described by pseudo second order kinetic model. It was also clearly observed that The present study indicated thatFlavobacterium sp.biomass may be used as a cost and effective biosorbent for the removal of Cu(II) ions from wastewater.

scholarly journals Kinetic studies of manganese removal from aqueous solution by adsorption on natural zeolite

2015 ◽  
Vol 34 (1) ◽  
pp. 213 ◽  
Author(s):  
Afrodita Zendelska ◽  
Mirjana Golomeova ◽  
Krsto Blažev ◽  
Blažo Boev ◽  
Boris Krstev ◽  
...  
Keyword(s):  
Natural Zeolite ◽  
Metal Ion ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Manganese Concentration ◽  
Order Kinetic ◽  
Uptake Mechanism ◽  
Manganese Removal ◽  
Rate Determining Step ◽  
Order Kinetic Model

<p>         The kinetics of manganese adsorption onto natural zeolite (clinoptilolite) were studied with respect to initial metal ion concentration and adsorbent mass. In order to select the main rate-determining step in the overall uptake mechanism, a series of experiments were performed under batch conditions from single ion solutions. Data obtained from the kinetic experiments are interpreted in terms of Pseudo-second order kinetic model, Weber and Morris model and model proposed by Furusawa and Smith.</p><p>          The adsorption kinetics is reasonably fast. It means that in the first 20 min approximately 75% of Mn<sup>2+</sup> is adsorbed from solutions. From the kinetic data can be concluded that adsorption of manganese ions from solution by natural zeolite is more efficiency at higher adsorbent mass and at lower manganese concentration in solution. Amount of Mn adsorbed on zeolite increase at higher manganese concentration in solution.</p><p>            From the kinetic models, can be concluded that intraparticular diffusion is more likely to be the rate determining step, but at higher concentrations of Mn ions in solution, film diffusion may be take a part in a rate determining step.</p>

Adsorption of Cu(II), Ni(II) and Zn(II) ions by nano kaolinite: Thermodynamics and kinetics studies

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Adsorption Process ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Adsorption Data ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Ft Ir

An easy route for preparation emulsion of kaolinite (Al2Si2O5.4H2O) from Sweileh sand deposits, west Amman, Jordan by hydrochloric acid under continuous stirring for 4 h at room temperature was performed and nano kaolinite powder was used as an adsorbent for the removal of Cu(II), Zn(II) and Ni(II) ions. Nano kaolinite was characterized by XRD, FT-IR and SEM techniques. Effect of pH, adsorbent dose, initial metal ion concentration, contact time and temperature on adsorption process was examined. The negative values of ΔGo and the positive value of ΔHo revealed that the adsorption process was spontaneous and endothermic. The Langmuir isotherm model fitted well to metal ions adsorption data and the adsorption capacity. The kinetic data provided the best correlation of the adsorption with pseudo-second order kinetic model. In view of promising efficiency, the nano kaolinite can be employed for heavy metal ions adsorption.

Lead removal from aqueous solutions by natural Greek bentonites

Clay Minerals ◽  
2013 ◽  
Vol 48 (5) ◽  
pp. 771-787 ◽  
Author(s):  
A. Bourliva ◽  
K. Michailidis ◽  
C. Sikalidis ◽  
A. Filippidis ◽  
M. Betsiou
Keyword(s):  
Kinetic Model ◽  
Metal Ion ◽  
Measurement Techniques ◽  
Ion Concentration ◽  
Area Measurement ◽  
Lead Removal ◽  
Order Kinetic ◽  
Solution Ph ◽  
Intra Particle Diffusion ◽  
Order Kinetic Model

AbstractThree bentonite samples (B1, B2, B3) from Milos Island, Greece, were investigated by XRD, AAS, DTA-TG, FTIR and specific surface area measurement techniques. A laboratory batch study has been performed to investigate the adsorption characteristics of lead ions (Pb2+) onto natural bentonite samples. The effect of various physicochemical factors that influence adsorption, such as solution pH (2–6), adsorbent dosage (1–10 g L–1), contact time (20–360 min), and initial metal ion concentration (5–150 mg L–1) was studied. A number of available models like the Lagergren pseudo first-order kinetic model, the pseudo second-order kinetic model and intra-particle diffusion were utilized to evaluate the adsorption kinetics. The adsorption of Pb2+ was modelled with the Langmuir, Freundlich and D-R isotherms. The maximum Pb2+ adsorption capacities for B1, B2 and B3 were 85.47 mg g–1, 73.42 mg g–1 and 48.66 mg g–1, respectively.

scholarly journals Phragmites karkaas a Biosorbent for the Removal of Mercury Metal Ions from Aqueous Solution: Effect of Modification

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Muhammad Hamid Raza ◽  
Aqsa Sadiq ◽  
Umar Farooq ◽  
Makshoof Athar ◽  
Tajamal Hussain ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Freundlich Isotherm ◽  
Agitation Speed ◽  
Second Order ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Phragmites Karka

Batch scale studies for the adsorption potential of novel biosorbentPhragmites karka(Trin), in its natural and treated forms, were performed for removal of mercury ions from aqueous solution. The study was carried out at different parameters to obtain optimum conditions of pH, biosorbent dose, agitation speed, time of contact, temperature, and initial metal ion concentration. To analyze the suitability of the process and maximum amount of metal uptake, Dubinin-Radushkevich (D-R) model, Freundlich isotherm, and Langmuir isotherm were applied. The values ofqmaxfor natural and treated biosorbents were found at 1.79 and 2.27 mg/g, respectively. The optimum values of contact time and agitation speed were found at 50 min and 150 rpm for natural biosorbent whereas 40 min and 100 rpm for treated biosorbent, respectively. The optimum biosorption capacities were observed at pH 4 and temperature 313 K for both naturalP. karkaand treatedP. karka.RLvalues indicate that comparatively treatedP. karkawas more feasible for mercury adsorption compared to naturalP. karka. Both pseudo-first-order and pseudo-second-order kinetic models were applied and it was found that data fit best to the pseudo-second-order kinetic model. Thermodynamic studies indicate that adsorption process was spontaneous, feasible, and endothermic.

scholarly journals Equilibrium and kinetics studies for the adsorption of Ni2+ and Fe3+ ions from aqueous solution by graphene oxide

2017 ◽  
Vol 19 (3) ◽  
pp. 120-129 ◽  
Author(s):  
Wojciech Konicki ◽  
Małgorzata Aleksandrzak ◽  
Ewa Mijowska
Keyword(s):  
Graphene Oxide ◽  
Kinetic Model ◽  
Metal Ion ◽  
Second Order ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Intraparticle Diffusion Model ◽  
Order Kinetic Model ◽  
Pseudo Second Order

Abstract In this study, the adsorption of Ni2+ and Fe3+ metal ions from aqueous solutions onto graphene oxide (GO) have been explored. The effects of various experimental factors such as pH of the solution, initial metal ion concentration and temperature were evaluated. The kinetic, equilibrium and thermodynamic studies were also investigated. The adsorption rate data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order kinetic model and the intraparticle diffusion model. Kinetic studies indicate that the adsorption of both ions follows the pseudo-second-order kinetics. The isotherms of adsorption data were analyzed by adsorption isotherm models such as Langmuir and Freundlich. Equilibrium data fitted well with the Langmuir model. The maximum adsorption capacities of Ni2+ and Fe3+ onto GO were 35.6 and 27.3 mg g−1, respectively. In addition, various thermodynamic parameters, such as enthalpy (ΔHO), entropy (ΔSO) and Gibbs free energy (ΔGO), were calculated.

Adsorption of Nickel Metal Ion from Simulated Aqueous Solution Using Flavobacterium sp. Biomass: a Kinetic and Thermodynamic Study

2011 ◽  
Vol 71-78 ◽  
pp. 2988-2991
Author(s):  
Yuan Hong Wang ◽  
Yun Yu ◽  
Rui Qun Liu ◽  
Wei Feng Liu
Keyword(s):  
Metal Ion ◽  
Binding Capacity ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Nickel Metal ◽  
Equilibrium Studies ◽  
Isotherm Equation ◽  
Langmuir Isotherm Equation ◽  
Initial Ph ◽  
Order Kinetic Model

Present study deals with the evaluation of biosorptive removal of nickel byFlavobacterium sp.Experiments have been carried out to find the effect of various parameters such as initial pH, contact time and initial metal ion concentration. Adsorption equilibrium studies showed that Ni(II) adsorption data followed the Langmuir model, the maximum binding capacity of Ni(II) was 64.20 mg/g at pH 7.0. Kinetics of nickel biosorption by Flavobacterium sp.biomass is better described by pseudo second order kinetic model. The equilibrium isotherm data are very well represented by Langmuir isotherm equation, which confirmed the monolayer coverage of nickel onto Flavobacterium sp.biomass. It was also clearly observed that The present study indicated thatFlavobacterium sp.biomass may be used as an inexpensive and effective biosorbent for the removal of Ni(II) ions from environmental wastewater.

scholarly journals Gum Arabic-Magnetite Nanocomposite as an Eco-Friendly Adsorbent for Removal of Lead(II) Ions from Aqueous Solutions: Equilibrium, Kinetic and Thermodynamic Studies

Separations ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 224
Author(s):  
Ismat H. Ali ◽  
Mutasem Z. Bani-Fwaz ◽  
Adel A. El-Zahhar ◽  
Riadh Marzouki ◽  
Mosbah Jemmali ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Gum Arabic ◽  
Ion Concentration ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Transmission Electron ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model

In this study, a gum Arabic-magnetite nanocomposite (GA/MNPs) was synthesized using the solution method. The prepared nanocomposite was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and thermogravimetric analysis (TGA). The prepared composite was evaluated for the adsorption of lead(II) ions from aqueous solutions. The controlling factors such as pH, contact time, adsorbent dose, initial ion concentration, and temperature were investigated. The optimum adsorption conditions were found to be 0.3 g/50 mL, pH = 6.00, and contact time of 30 min. The experimental data well fitted the pseudo-second-order kinetic model and the Langmuir isotherm model. The maximum adsorption capacity was determined as 50.5 mg/g. Thermodynamic parameters were calculated postulating an endothermic and spontaneous process and a physio-sorption pathway.

scholarly journals Amine modified kaolinite clay from Nigeria: A resource for removing Cd2+ and Pb2+ ions from aqueous solution

2019 ◽  
Vol 17 (2) ◽  
Author(s):  
Adewale Adewuyi ◽  
Fabiano Vargas Pereira ◽  
Omotayo Anuoluwapo Adewuyi
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Bet Surface Area ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
Kaolinite Clay ◽  
Effects Of Ph ◽  
Infrared Spectrometer

Kaolinite clay (KC) obtained from redemption camp; Nigeria was modified by surface grafting and investigated for the removal of Pb2+ and Cd2+ ions from aqueous solution by adsorption. KC and the modified kaolinite clay (MKC) were characterized using X-ray Diffraction analysis (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analyzer, Fourier Transform Infrared spectrometer (FTIR), Particle Size Distribution (PSD), zeta potential, elemental analysis (CHNS/O analyzer) and Energy Dispersive Spectroscopy (EDS). Equilibrium, thermodynamics and kinetic studies were conducted by considering the effects of pH, initial metal ion concentration, contact time, adsorbent weight and temperature. Modification of KC increased its equilibrium adsorption capacity from 8.01 mg/g for Cd2+ and from 24.75 mg/g to 36.41 mg/g for Pb2+ ions. The adsorption process obeys Freundlich and Temkin isotherms. The adsorption was second-order-kinetic and controlled by both intra-particle and liquid film diffusion. Values of ΔGo, ΔHo, and ΔSo, for KC an MKC showed a stable adsorbent-adsorbate configuration.

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