scholarly journals Ion exchange Behavior of Polyaniline and Polyaniline/Silica Composite

2020 ◽  
Vol 17 (1) ◽  
pp. 59
Author(s):  
Amirah Amalina Ahmad Tarmizi ◽  
Muhammad Adam 'Azmi
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Rice Husk ◽  
Inductively Coupled Plasma ◽  
Contact Time ◽  
Ph Value ◽  
Potassium Dichromate ◽  
Optical Emission ◽  
Silica Composite ◽  
Exchange Behaviour

This study was conducted to compare the ion exchange behaviour of polyaniline (PANI) and polyaniline/silica (PANI/silica) composite. Rice husk silica (SiRH) was obtained from the combustion of rice husk ash followed by acid digestion method using sulfuric acid. Next, pristine PANI was synthesized via in situ oxidative polymerisation method using aniline and potassium dichromate in the acidic medium. Composite of PANI/SiRH was prepared with a similar method with the addition of SiRH in the process. Characterisations were done by employing X-Ray diffractometry and Fourier transform infrared spectroscopy. Polyaniline and PANI/SiRH composite were mixed with a solution containing Na+, Mg2+, and K+. The concentrations of metal ions before and after contact with PANI and PANI/SiRH were measured using inductively coupled plasma-optical emission spectroscopy (ICP-OES). The effect of SiRH composition, contact time and pH on the ion exchange behaviour of PANI and PANI/SiRH composite was investigated. Results revealed that higher SiRH content in PANI/SiRH shows better ion-exchange properties with the optimum contact time of 30 minutes. The pH value of the metal ions decreased throughout the experiment.

Intermediate-stage transition metal ion exchange in a zeolite X

1982 ◽  
Vol 35 (7) ◽  
pp. 1335 ◽  
Author(s):  
M Chatterjee ◽  
D Ganguli
Keyword(s):  
Ion Exchange ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Intermediate Stage ◽  
Transition Metal Ions ◽  
Zeolite X ◽  
Counter Ions ◽  
Metal Ion Exchange ◽  
Exchange Behaviour

The exchange behaviour of some divalent transition metal ions M2+ (Zn2+, Cu2+, Ni2+, Co2+, Mn2+) in a zeolite NaX (SiO2/Al2O3 2.75) was studied at intermediate stages before equilibrium. The equivalent counter ion supply in the solution, given by the equivalent ratio of the two counter ions 2M2+/Na+, was found to be critical in determining the saturation level of exchange. The series of relative abilities of exchange was very similar to the well known selectivity series at equilibrium. It is suggested that water exchange of the metal ions in solution could be one of the factors controlling the relative ease of ion exchange.

Ion exchange behaviour of crystalline niobium antimonate towards alkali metal ions

1978 ◽  
Vol 40 (3) ◽  
pp. 545-547 ◽  
Author(s):  
J.P. Gupta ◽  
D.V. Nowell ◽  
M. Qureshi ◽  
A.P. Gupta
Keyword(s):  
Ion Exchange ◽  
Alkali Metal ◽  
Metal Ions ◽  
Alkali Metal Ions ◽  
Exchange Behaviour

scholarly journals Chromatographic separation of In(III) from Cd(II) in aqueous solutions using commercial resin (Dowex 50W-X8)

2010 ◽  
Vol 8 (3) ◽  
pp. 696-701 ◽  
Author(s):  
Ayman Massoud ◽  
F. Abou El-Nour ◽  
H. Killa ◽  
U. Seddik
Keyword(s):  
Hydrochloric Acid ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Chromatographic Separation ◽  
Contact Time ◽  
Ph Value ◽  
Aqueous Media ◽  
Cadmium Ions ◽  
Initial Concentration ◽  
Commercial Resin

AbstractThis work assesses the potential of an adsorptive material, Dowex 50w-x8, for the separation of indium ions from cadmium ions in aqueous media. The adsorption behavior of Dowex 50 w-x8 for indium and cadmium ions was investigated. The effect of pH, initial concentration of metal ions, the weight of resins, and contact time on the sorption of each of the metal ions were determined. It was found that the adsorption percentage of the indium ions was more than 99% at pH 4.0. The result shows that In (III) was most strongly extracted, while Cd(II) was slightly extracted at this pH value. The recovery of In(III) and Cd(II) ions is around 98% using hydrochloric acid as the best eluent.

Comparative MCDM Analysis for AMD Treatment Method Selection

2021 ◽  
Author(s):  
Zoran Štirbanović ◽  
Vojka Gardić ◽  
Dragiša Stanujkić ◽  
Radmila Marković ◽  
Jovica Sokolović ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Adsorption Process ◽  
Mine Drainage ◽  
Ph Value ◽  
Low Cost ◽  
Treatment Method ◽  
Passive Treatment ◽  
Copper Production ◽  
Capital Costs

Abstract Robule Lake is located in Eastern Serbia, near city of Bor, known for copper production, and it is being influenced by waste materials from mining activities. For the purification of water from Robule Lake, contaminated with various metal ions (Fe, Cu, Zn, Mn, Cd, Ni, etc.), acid mine drainage (AMD) treatment methods such as: passive treatment method, sequential neutralization, ion exchange, adsorption process based on low cost adsorbents, adsorption process based on natural zeolits, electrodialysis, filtration with nanofiltration membranes, and reverse osmosis, were evaluated by following MCDM methods: TOPSIS, VIKOR, MOOSRA; WASPAS, and CoCoSo. Criteria used for the evaluation were: efficiency in the metal ions removal and the quality of the purified water, necessity of pre-treatment and / or post-treatment of treated water, possibility of using the generated waste, capital costs, operating and maintenance costs, needed area, and sensitivity of the method. The results of the MCDM analysis showed that sequential neutralization was the most appropriate for this wastewater, while passive treatment system and ion exchange were ranked as second and third, respectively.After the selection of AMD treatment method, neutralization tests with lime were carried out on the water sample from Robule Lake. The results of sequential neutralization testing showed that concentration of Fe ions could be lowered below the maximal allowable concentration prescribed by Serbian legislation at pH value 4. The other metal ions: Cu, Zn, and Ni needed pH value 7, and Mn and Cd needed pH 10 for effective removal.

scholarly journals Optimization with Response Surface Methodology of biosorption conditions of Hg(II) ions from aqueous media by Polyporus Squamosus fungi as a new biosorbent

2017 ◽  
Vol 43 (2) ◽  
pp. 37-43 ◽  
Author(s):  
Yusuf Uzun ◽  
Tekin Şahan
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Inductively Coupled Plasma ◽  
Contact Time ◽  
Low Cost ◽  
Aqueous Media ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Optimal Conditions ◽  
Polyporus Squamosus

Abstract Removal of mercury(II) (Hg(II)) from aqueous media by a new biosorbent was carried out. Natural Polyporus squamosus fungus, which according to the literature has not been used for the purpose of Hg(II) biosorption before, was utilized as a low-cost biosorbent, and the biosorption conditions were analyzed by response surface methodology (RSM). Medium parameters which were expected to affect the biosorption of Hg(II) were determined to be initial pH, initial Hg(II) concentration (Co), temperature (T (°C)), and contact time (min). All experiments were carried out in a batch system using 250 mL fl asks containing 100 mL solution with a magnetic stirrer. The Hg(II) concentrations remaining in fi ltration solutions after biosorption were analyzed using Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). Based on the RSM results, the optimal conditions were found to be 5.30, 47.39 mg/L, 20°C and 254.9 min for pH, Co, T (°C), and contact time, respectively. Under these optimal conditions, the maximum biosorbed amount and the biosorption yield were calculated to be 3.54 mg/g and 35.37%, respectively. This result was confi rmed by experiments. This result shows that Polyporus squamosus has a specifi c affi nity for Hg ions. Under optimal conditions, by increasing the amount of Polyporus squamosus used, it can be concluded that all Hg ions will be removed

scholarly journals Enhanced Removal of Metal Ions from Water by Novel Composite Magnesia-Amended Silica Granules

2009 ◽  
Vol 27 (4) ◽  
pp. 383-394
Author(s):  
P. Y. Zhu ◽  
H.Z. Wang ◽  
X. Li ◽  
X.F. Tang
Keyword(s):  
Silicon Dioxide ◽  
Metal Ions ◽  
Contact Time ◽  
Ph Value ◽  
Weak Acid ◽  
Adsorption Processes ◽  
Infrared Spectral ◽  
Removal Of Metal ◽  
Removal Of Metal Ions ◽  
Best Fit

The potential of a novel sorbent, magnesia-amended silica granules (MAS), for the removal of metal ions from aqueous solution has been examined. MAS, prepared by calcining magnesium chloride-impregnated silicon dioxide at 773 K, exhibited an adsorption capacity towards metal ions that was 15- to 30-times larger than that of silicon dioxide. Batch sorption studies were performed as a function of contact time and pH. X-Ray powder diffraction (XRD), infrared spectral analysis (FT-IR), porosity and surface area measurements were used to characterize the physicochemical properties of MAS. At an initial concentration of 50 mg/ℓ, more than 90% removal of metal ions was achieved within 8 h contact time at a weak acid pH value. Of the kinetic models tested, the pseudo-second-order model gave the best fit to the kinetic data, while the Langmuir isotherm model provided the best fit to the equilibrium adsorption data for metal ions onto MAS. The adsorption processes were endothermic.

scholarly journals Synthesis of keratin spray from chicken feathers for biomedical applications

2021 ◽  
Vol 3 (2) ◽  
pp. 18-22
Author(s):  
Mohamed Saad Bala ◽  
Liyana Maryam ◽  
Basma Yahya Alashwal ◽  
Arun Gupta ◽  
Triveni Soubam ◽  
...  
Keyword(s):  
Wound Healing ◽  
Inductively Coupled Plasma ◽  
Ph Value ◽  
Wound Care ◽  
Healing Process ◽  
Optical Emission ◽  
Repair Process ◽  
Emission Spectrometry ◽  
Wound Healing Process ◽  
Chicken Feathers

There is a pressing need to develop wound healing spray that can utilize it for the treatment of skin rebuilding. Wound healing involves the regeneration and tissue repair process with the sequence of molecular and cellular measures that ensue the onset of a tissue lesion to reestablish the damaged tissue. This study aimed to produce the best formulation of keratin-based wound spray which was prepared by varying of the keratin concentration to suit for human nature skin and can be promoted for the wound healing process. A wound-healing bouquet was prepared with keratin as the primary substituent mixed with 2-phenyl ethanol, methyl lactate, and methyl propanediol to rejuvenate the skin effectively. The keratin has been extracted from chicken feathers which have high levels of protein source. Keratinocytes containing keratin migrate from the wound edges to cover the wound during the remedial process. The samples are characterized by Fourier Transform Infrared Spectroscopy (FTIR) to determine the functional groups and Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) for heavy metal analysis. The characteristics of keratin-based wound spray from chicken feather made it an effective wound care product. The pH value of the formulation possesses a little acidic nature (pH 5.56) where is considered an appropriate nature to prevent the growth of bacteria. This wound healing spray gives a suitable domain of cure efficiency to the injured region as they have ideal levels of pH.

scholarly journals In Vitro Evaluation of Biologically Derived Hydroxyapatite Coatings Manufactured by High Velocity Suspension Spraying

2021 ◽  
Author(s):  
M. Blum ◽  
M. Sayed ◽  
E. M. Mahmoud ◽  
A. Killinger ◽  
R. Gadow ◽  
...  
Keyword(s):  
High Velocity ◽  
Inductively Coupled Plasma ◽  
Ph Value ◽  
Low Cost ◽  
Optical Emission ◽  
Fish Bone ◽  
Emission Spectrometry ◽  
Slight Variation ◽  
Flame Spray

AbstractThis investigation aims to study a novel biologically derived coating applied on Ti alloy substrates. Obtained from a low-cost fish bone resource, a nanocrystalline hydroxyapatite has been synthesized and converted to an organic suspension. Coating was then manufactured by a high-velocity suspension flame spray process. The microstructure, phase composition, coating thickness, and roughness of hydroxyapatite (HA)-coated samples were studied. The results indicated the presence of both hydroxyapatite and β-tricalcium phosphate phases and the final coating layer was uniform and dense. In vitro bioactivity and biodegradability of the HA/Ti composite samples were estimated by immersion in simulated body fluid. Remarkable reductions in Ca2+ and PO43− ion concentrations were observed as well as low weight loss percentage and a slight variation in the pH value, indicating the generation of an apatite layer on the surface of all studied samples. Scanning electron microscopy, energy-dispersive x-ray analysis, and inductively coupled plasma–optical emission spectrometry confirm these results. Thus biological derived HA coatings are a promising candidate to enhance bioactivity and biodegradability of bone implants. To demonstrate feasibility on commercial medical components, a medical screw was coated and evaluated.

scholarly journals New Poly(β-Cyclodextrin)/Poly(Vinyl Alcohol) Electrospun Sub-Micrometric Fibers and Their Potential Application for Wastewater Treatments

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 482 ◽  
Author(s):  
Anastasia Anceschi ◽  
Fabrizio Caldera ◽  
Moira Bertasa ◽  
Claudio Cecone ◽  
Francesco Trotta ◽  
...  
Keyword(s):  
Metal Ions ◽  
Vinyl Alcohol ◽  
Inductively Coupled Plasma ◽  
Metal Ion ◽  
Chemical Properties ◽  
Optical Emission ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Fiber Morphology ◽  
Scanning Calorimetry

Cyclodextrin (CD)-based polymers are known to efficiently form molecular inclusion complexes with various organic and inorganic guest compounds. In addition, they also have a great potential as metal complexes because deprotonated hydroxyls can strongly bind metal ions under alkaline conditions. The range of environmental conditions for polycyclodextrin/metal ion complexation can be extended by the polymerization of CDs with polyacids. This article describes the preparation and characterization of a new type of poly(β-cyclodextrin) (Poly-βCD) sub-micrometric fibers and explores their potential as metal ion sorbents. A water-soluble hyper-branched β-cyclodextrin polymer was blended with poly(vinyl alcohol) (PVA) and here used to improve the mechanical and morphological features of the fibers. Solutions with a different Poly-βCD/PVA ratio were electrospun, and the fibers were cross-linked by a post-spinning thermal treatment at 160 °C to ensure non-solubility in water. The fiber morphology was analyzed by scanning electron microscopy (SEM) before and after the curing process, and physical-chemical properties were studied by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The capability of the insoluble cyclodextrin-based fibers to remove heavy metals from wastewaters was investigated by testing the adsorption of Cu2+ and Cd2+ using inductively coupled plasma-optical emission spectroscopy (ICP-OES). The results suggest that the poly(β-cyclodextrin)/poly(vinyl alcohol) sub-micrometric fibers can complex metal ions and are especially effective Cu2+ sorbents, thus opening new perspectives to the development of fibers and membranes capable of removing both metal ions and organic pollutants.

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