scholarly journals Preparation, Characterization and Utilization of Amidoximated Poly(AN/MAA)-grafted Alhagi Residues for the Removal of Zn(II) Ions from Aqueous Solution

2009 ◽  
Vol 27 (4) ◽  
pp. 363-382 ◽  
Author(s):  
A.A. Khalil ◽  
H.H. Sokker ◽  
A. Al-Anwar ◽  
A. Abd El-Zaher ◽  
A. Hashem
Keyword(s):  
Aqueous Solution ◽  
Hydroxylamine Hydrochloride ◽  
Factors Affecting ◽  
Monomer Composition ◽  
Freundlich Isotherms ◽  
Adsorption Temperature ◽  
Adsorption Data ◽  
Adsorption Processes ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Radiation grafting by the mutual method of methacrylic acid/acrylonitrile (MAA/AN) onto Alhagi residues in the presence of dimethylformamide (DMF) as a solvent is discussed. The factors affecting the radiation graft copolymerization were investigated. These included radiation dose, co-monomer composition and concentration. The grafted samples were characterized using FT-IR spectroscopy and scanning electron microscopy (SEM), as well as by the estimation of their nitrogen and carboxyl group contents. The grafted samples were then amidoximated by treatment with hydroxylamine hydrochloride in an alkaline medium. Such amidoximated poly(MAA/AN)-grafted Alhagi residues were utilized for the removal of Zn(II) ions from aqueous solution by adsorption and the factors affecting such adsorption processes were studied. These factors were the pH of the adsorbate solution, the adsorbent dosage, the contact time and the adsorption temperature. The adsorption data obeyed the Langmuir and Freundlich isotherms. The Langmuir adsorption capacity (Qmax) of the amidoximated poly(MAA/AN)-grafted Alhagi residues towards Zn(II) ions was found to be 212.76 and 344.8 mg/g at 30 °C and 50 °C, respectively. Similarly, the Freundlich constants, KF and 1/n, at 30 °C were found to be 21.47 and 0.3489, respectively. The study showed that amidoximated poly(MAA/AN)-grafted Alhagi residues were effective in the adsorption of Zn(II) ions from aqueous solutions. The thermodynamics parameters of the adsorption process, viz. ΔH0, ΔG0 and ΔS0, were evaluated. The results showed that the adsorption of Zn(II) ions onto amidoximated poly(MAA/AN)-grafted Alhagi residues was endothermic and spontaneous. The adsorption data followed second-order kinetics.

scholarly journals γ-Induced Graft Copolymerization onto Cellulosic Fabric Waste for Cationic Dye Removal

2005 ◽  
Vol 23 (6) ◽  
pp. 455-466 ◽  
Author(s):  
A. Hashem ◽  
H.H. Sokker ◽  
E.S. Abdel Halim ◽  
A. Gamal
Keyword(s):  
Methylene Blue ◽  
Graft Copolymerization ◽  
Monomer Concentration ◽  
Maximum Adsorption Capacity ◽  
Factors Affecting ◽  
Freundlich Isotherms ◽  
Adsorption Data ◽  
Ft Ir ◽  
Cellulosic Fabric ◽  
Ft Ir Spectroscopy

Radiation grafting of itaconic acid (IA) onto cellulosic fabric in the presence of dimethylformamide (DMF) as a solvent by the mutual method is discussed. Factors affecting the radiation graft copolymerization were investigated. These factors include the radiation dosage, the monomer concentration and the solvent. The grafted samples were characterized using FT-IR spectroscopy, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). Utilization of the grafted cellulosic fabric waste in the removal of Methylene Blue (MB) from aqueous solution was examined. The adsorption data showed that the maximum adsorption capacity of Methylene Blue onto grafted cellulosic fabric waste was 38 mg/g. The adsorption data also obeyed the Langmuir and Freundlich isotherms.

scholarly journals Application of Some Starch Hydrogels for the Removal of Mercury(II) Ions from Aqueous Solutions

2008 ◽  
Vol 26 (8) ◽  
pp. 563-579 ◽  
Author(s):  
A. Hashem ◽  
F. Ahmad ◽  
R. Fahad
Keyword(s):  
Aqueous Solutions ◽  
Water Retention ◽  
Graft Polymerization ◽  
Ph Value ◽  
Ceric Ammonium Nitrate ◽  
Factors Affecting ◽  
Freundlich Isotherms ◽  
Adsorption Data ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Three types of starch hydrogels were prepared via the graft polymerization of acrylonitrile, AN, onto maize starch using ceric ammonium nitrate, CAN, as the initiator, followed by saponification with sodium hydroxide. The prepared hydrogel samples were characterized by estimating their nitrogen and carboxy group contents, and by the application of FT-IR spectroscopy, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM); in addition, their water retention values, WRVs, were also determined. The feasibility of using these hydrogels to remove Hg(II) ions from aqueous solutions was examined. Factors affecting the adsorption of Hg(II) ions onto the starch hydrogels were studied, including the pH value of the solution, the contact time and the concentrations of the adsorbent and adsorbate. The present study has shown that the prepared hydrogels could be used effectively for the adsorption of Hg(II) ions from aqueous solutions. The adsorption data obtained obeyed the Langmuir and Freundlich isotherms. The adsorption of Hg(II) ions onto the starch hydrogels followed second-order kinetics. An examination was made of the mechanism for the adsorption of Hg(II) ions onto the starch hydrogels.

The Study of the Removal of Cu(II) from Aqueous Solution by Papia undulates Shell

2016 ◽  
Vol 675-676 ◽  
pp. 664-666
Author(s):  
Noppadon Chamchoi ◽  
Narong Sangwaranatee ◽  
Jakrapong Kaewkhao ◽  
K. Teanchai ◽  
Wichian Siriprom
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Experimental Result ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
Factors Affecting ◽  
X Ray ◽  
Mixture Phase ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

In present study, the removal of Cu (II) ions from aqueous solution was investigated by both biosorption and investigated by X-ray Diffraction (XRD), Energy Dispersive X-ray Fluorescence (EDXRF) and Fourier transform infrared (FT-IR) spectroscopy. The variable of the batch experiment include solution pH, content time, were conducted to determine the factors affecting capacities sorption of Cu (II). The experimental result explored that that the maximum pH for efficient sorption of Cu (II) was 9. The optimum condition of sorption were found to be contact time of 180 min, and initial Cu concentration 200 mg/L, while the result of XRD reveal that the Paphia undulate shell have aragonite phase and change to mixture phase after sorption which corresponding, with the result of EDXRF which increasing the concentration of Cu

Quantitative Analysis of Monomer Composition in Ethylene-Propylene Block Copolymers by FT-IR Spectroscopy

1987 ◽  
Vol 41 (2) ◽  
pp. 319-320 ◽  
Author(s):  
Ralph M. Paroli ◽  
Jaime Lara ◽  
Jean-Jacques Hechler ◽  
Kenneth C. Cole ◽  
Ian S. Butler
Keyword(s):  
Quantitative Analysis ◽  
Block Copolymers ◽  
Ir Spectroscopy ◽  
Ethylene Propylene ◽  
Monomer Composition ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Gelatin-Glutaradehyde-Poly(Vinyl Alcohol) Bioadsorbent: Synthesis, Characterization and Application for Copper(II) Ion Removal from Synthetic Aqueous Solution

2008 ◽  
Vol 569 ◽  
pp. 217-220 ◽  
Author(s):  
Xue Gang Luo ◽  
Feng Liu ◽  
Xiao Yan Lin ◽  
Jian Zhou
Keyword(s):  
Aqueous Solution ◽  
Vinyl Alcohol ◽  
Freundlich Isotherm ◽  
Poly Vinyl Alcohol ◽  
Isotherm Equation ◽  
Ion Removal ◽  
Adsorption Data ◽  
Initial Ph ◽  
Ft Ir

A new Gelatin-glutaradehyde-Poly(vinyl alcohol) bioadsorbent was synthesized by immobilizing Poly(vinyl alcohol) onto gelatin followed by cross-linking. This technique gives the bioadsorbent of gelatin good chemical resistance and mechanical strength. SEM and FT-IR were conducted for characterization of the bioadsrobent. A comprehensive adsorption study of Copper(II) removal from synthetic aqueous solution by adsorption on this bioadsorbent was conducted regarding the effects of initial pH, time, and copper(II) initial concentration. The adsorption data were applied to Freundlich isotherm equation and its contents were calculated. The results obtained showed that the new absorbent has good performance for the removal of copper(II).

Removal of Heavy Metals by Using Chitosan/ Poly (Acryl Amide-Acrylic Acid) Hydrogels: Characterization and Kinetic Study

2021 ◽  
Vol 19 (2) ◽  
pp. 31-37
Author(s):  
Layth S. Jasim ◽  
Aseel M. Aljeboree
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Reaction Order ◽  
Time Intervals ◽  
Freundlich Isotherms ◽  
Removal Of Heavy Metals ◽  
Ft Ir ◽  
Structural Surface ◽  
Kinetics Of ◽  
Kinetics Of Sorption

In this Study, hydrogel P(CH/AA-co-AM) was prepared, identification and utilized as an efficient absorbent to eliminate Cr (III) and Cd (II) ions from the aqueous solution. The adsorption of these ions follows Freundlich isotherms. Due to greater activity surface of the hydrogel in adsorption of the contaminants, they can be utilized for elimination of the mentioned ions from water. Therefore, we characterized structural, surface and thermal properties of the prepared materials with technique: TGA, FE-SEM and FT-IR. Moreover, we implemented the kinetics of sorption with regard to the amounts of the metal sorbet at distinct time intervals and thus examined the modeling of the isotherm and kinetic curves. Finally, we computed the reaction order as well as rate constant.

Improved Study on the Performance of Polyacrylamide/Attapulgite Clay Composite Material Removing Copper (II) Ions from Aqueous Solution

2014 ◽  
Vol 609-610 ◽  
pp. 26-31
Author(s):  
Chun Lei Li ◽  
Hui Xu ◽  
Jun Long Zhang ◽  
Wei Wang ◽  
Jing Tang ◽  
...  
Keyword(s):  
Metal Ion ◽  
Ion Concentration ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Freundlich Isotherms ◽  
Thermodynamics And Kinetics ◽  
Equilibrium Data ◽  
Ft Ir ◽  
Adsorption Desorption ◽  
Ft Ir Spectroscopy

A removal of Cu (II) ions from aqueous solutions onto PAM/ATP has been investigated using batch adsorption technique, including the effect of pH, contact time, initial metal ion concentration, adsorption thermodynamics and kinetics. PAM/ATP was characterized with Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The equilibrium data were analyzed using Langmuir and Freundlich isotherms and the best interpretation was given by Langmuir. The maximum adsorption capacity was found to be 212 mg/g after 60 min when pH =3. Regeneration experiments showed that the investigated PAM/ATP could be reused without significant adsorption losses even after five adsorption-desorption cycles.

Hypercrosslinked Polymers Preparation VS Methylene Blue Adsorption

2013 ◽  
Vol 743-744 ◽  
pp. 539-544
Author(s):  
Lin Xiu Zhao ◽  
Si Guo Yuan ◽  
Jiao Sha ◽  
Shao Bin Li
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Reactive Dye ◽  
Freundlich Model ◽  
Polymeric Adsorbents ◽  
Bet Specific Surface Area ◽  
Adsorption Processes ◽  
Ft Ir ◽  
Polymer Adsorbent ◽  
Hypercrosslinked Polymers

In the study, two kinds of hypercrosslinked polymers were prepared by polymerization of dichloromethyl aryl monomer with benzene or itself. The chemical and pore structure of above polymers were characterized by FT-IR and BET. The results showed that these polymers possessed high BET specific surface area (up to 1000 m2/g) and large pore volumes (up to 1.2cm3/g). Two commercial polymer adsorbent (XAD-4, H103) and two new synthesized polymeric adsorbents (BE-XDC, CMB-CMB) have been used for the adsorption of reactive dye methylene blue (MB) from aqueous solution, and the static capacity followed an order as: CMB-CMB(142.77mg/g) > BE-XDC(104.61mg/g) > H103(71.01mg/g) > XAD-4(53.85mg/g). The Equilibrium adsorption data of the four polymeric adsorptions were obtained and fitted very well to Freundlich model. The adsorption equilibrium time of CMB-CMB, BE-XDC resin were less than 200min, which were faster than that of XAD-4, H103. The free energy changes, ΔG for adsorption of MB on the four polymeric adsorbents in the aqueous solution was evaluated. The negative values of ΔG indicated that the overall adsorption processes were spontaneous and thermodynamically favorable.

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