National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
56
3
2013
06
30
Honey Bee for Eco-friendly Green Synthesis of Silver Nanoparticles and Application to Cotton Textile
187
198
EN
10.21608/ejchem.2013.1107
<span style="font-size: xx-small;">ARAPID and eco-friendly method was devised for fabrication of …….sliver nanoparticles AgNPs at low temperature using honey bee as a reducing agent for silver nitrate and stabilizing agent for AgNPs formed thereof. Formation of AgNPs was evaluated by monitoring UV-vis spectra of the silver colloidal solution, whereas the size of the formed nanoparticles were measured by transmission electron microscopy(TEM). Different reaction parameters pertaining to the synthesis of AgNPs were studied in order to establish optimization. Accordingly, by the most appropriate conditions for preparation of AgNPs colloidal solution having adequate concentration for industrial application, that is, (1080 ppm) were: 10 ml honey bee, 0.17g AgNO</span><span style="font-size: xx-small;">3</span><span style="font-size: xx-small;">/ 100ml, pH11, temperature 50</span><span style="font-size: xx-small;">o</span><span style="font-size: xx-small;">C and reaction duration of 60 min. Cotton fabric was treated by the prepared silver nanoparticles colloidal solution using pad-dry curing technique in presence and absence of a binding agent. Thus treated fabrics were evaluated using scanning Electron microscopy (SEM) and bio-assay for antimicrobial activity. </span>
Honey bee,Nanoparticales,Antimicrobial activity and Cotton fabric
https://ejchem.journals.ekb.eg/article_1107.html
https://ejchem.journals.ekb.eg/article_1107_fe134d9e38f66ff3ec4305544f322555.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
56
3
2013
06
30
Catalytic Degradation of Phenol Using Different Chelating Agent at Near Neutral pH in Modified-Fenton Process
199
212
EN
10.21608/ejchem.2013.1108
FENTON'S reagent is a mixture of ferrous iron catalyst and
<span style="color: #ffffff; font-family: Times New Roman; font-size: xx-small;" lang="JA"><span style="color: #ffffff; font-family: Times New Roman; font-size: xx-small;" lang="JA"><span style="color: #ffffff; font-family: Times New Roman; font-size: xx-small;" lang="JA">…….</span></span></span><span style="font-family: Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman; font-size: xx-small;">hydrogen peroxide, used for oxidation of organic compounds in acidic medium. As the pH increases, the iron ions precipitate and diminish the oxidative efficiency of Fenton reaction. We selected different chelating agents [glutamic acid (Glu), citric acid (CIT) and sodium citrate (SC)] that form Fe-chelates soluble in neutral pH (Modified-Fenton) for studying its effect on phenol degradation. The results revealed that the rate of degradation by Glu, CIT and SC iron chelates were 73, 60 and 77%, respectively, in short term experiments (3hr). In the long term experiments (24hr), the degradation was increased to 82, 72 and 86%, respectively.</span></span>
Phenol,Modified Fenton (MF),Hydrogen Peroxide,Degradation,Glutamic acid (Glu),Advanced oxidation processes (AOPs),Citric acid (CIT) and Sodium citrate (SC)
https://ejchem.journals.ekb.eg/article_1108.html
https://ejchem.journals.ekb.eg/article_1108_4cd5f89660afeb01f2d8a9a953aace88.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
56
3
2013
06
30
Formulation and Application of Whey-Protein Based Coatings for Improved Paperboard Properties
213
224
EN
10.21608/ejchem.2013.1109
<span style="font-size: xx-small;">AN ECONOMICALLY acceptable approach to improve water ........barrier property of paperboard was established. This approach is based on preparation and application of biodegradable- based polymeric coatings onto paperboard surfaces composed of a combination of commercial whey protein and polyvinyl alcohol. Blending of PVA solution with whey protein solution led to improvement in the viscosity of the resultant formula. Low molecular weight polyol (glycerol) was also used as a plasticizer in the formula. Films containing different ratios of whey protein and PVA were prepared and characterized by FTIR. SEM was used to investigate the surface morphology of the prepared films as well as the coated paperboard. It was noticed that film surfaces containing large percent whey protein were rough. Mechanical tests of films and coated paperboard show positive results. Water permeability of coated paperboard by biopolymer blend was improved by approximately 60% compared to uncoated substrate. This work has also explored the recycling potential of barrier-coated boards as an alternative option to disposal in a landfill. </span>
coating,Paperboard,Whey protein and Water permeability
https://ejchem.journals.ekb.eg/article_1109.html
https://ejchem.journals.ekb.eg/article_1109_f59fd5255ddd026c2b7afb9005b8900a.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
56
3
2013
06
30
Aminotrimethylene Phosphonic Acid and Sodium Ethyl Xanthate for Purification of Stripped Phosphoric Acid Produced from Commercial Acid by Solvent Extraction
225
240
EN
10.21608/ejchem.2013.1110
<span style="font-size: xx-small;">PHOSPHORIC acid is the second most produced acid after …….H</span><span style="font-size: xx-small;">2</span><span style="font-size: xx-small;">SO</span><span style="font-size: xx-small;">4</span><span style="font-size: xx-small;">. It was used as a raw material for the production of detergents, food products, and alimentary supplies for cattle, toothpastes and fertilizers. High grade phosphoric acid was obtained using liquid-liquid extraction with aliphatic alcohols to separate metal and fluoride ion impurities in the aqueous phase. The influence of alcohol concentration, organic/aqueous phase ratio, temperature, shaking time and phosphoric acid concentration on P</span><span style="font-size: xx-small;">2</span><span style="font-size: xx-small;">O</span><span style="font-size: xx-small;">5 </span><span style="font-size: xx-small;">extraction was studied. N-Nonanol proved to be the most efficient and selective alcohol and the temperature had a slight positive effect and the extraction was enhanced by increasing P</span><span style="font-size: xx-small;">2</span><span style="font-size: xx-small;">O</span><span style="font-size: xx-small;">5 </span><span style="font-size: xx-small;">and with the increase of organic/aqueous phase ratio. The optimum organic/aqueous phase ratio was determined to be 2.0. Stripping was also investigated, the purification of stripped phosphoric acid was achieved using sodium ethyl xanthate where 95.1% of iron was removed, also aminotrimethylene phosphonic acid can be successfully used for decreasing iron content to 190.9 ppm and to produce highly pure grade phosphoric acid. </span>
Aminotrimethylene phosphonic acid,Sodium ethyl xanthate,Stripped phosphoric acid solution and Solvent extraction technique
https://ejchem.journals.ekb.eg/article_1110.html
https://ejchem.journals.ekb.eg/article_1110_6ad63676622efa94b75849691a8c5fbf.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
56
3
2013
06
30
Establishment of Optimum Conditions for Preparation of Silver Nanoparticles Using Carboxymethyl Chitosan
241
254
EN
10.21608/ejchem.2013.1111
SILVER nanoparticles (AgNPs) with tailored characteristics are prepared using carboxymethyl chitosan (CMCs) which plays a dual role ; as a reducing agent for conversion of Ag+ to Ago and as a stabilizing agent to prevent aggregation of Ago and / or its clusters. The preparation involves a thorough investigation into factors affecting formation of AgNPs characteristics and dependence of them on these factors. Factors studied encompass concentrations of silver nitrate and CMCs as well as pH, time and temperature of the synthesizing medium. Sophisticated tools such as FT-IR, UV-vis spectral analyses and TEM reveal major characteristics of AgNPs formed as well as size, distribution and shape of AgNPs. According to current work, the most appropriate condition of converting silver ions into AgNPs are 0.25% solution of CMCs and 6ml of 0.1N AgNO3 (0.102 g / 100 ml) and carrying out the reaction at 70 oC for 45 min at pH 11.
CMCs,Silver nanoparticles and Chemical reduction method
https://ejchem.journals.ekb.eg/article_1111.html
https://ejchem.journals.ekb.eg/article_1111_376353eac9be586831bdbad2adf598da.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
56
3
2010
06
30
Utilization of Synthetic Zeolite for Removal of Anionic Dyes
449
464
EN
10.21608/ejchem.2010.1236
<span style="font-size: xx-small;">THE REMOVAL performance of highly colored soluble organic pollutpollutants in water has been investigated. Comparative adsorption studies of some anionic dyes on commercially zeolite X and zeolite X powder prepared from Egyptian kaolin have been studied. Brilliant blue FCF (BL), brilliant black PN (BB), eriochrome black T (EBT) and ponceau 3R (P3R) were introduced as models for organic pollutants of different structures. For comparison, the properties of the synthetic zeolite and commercial grade zeolite, such as crystallinity, thermal stability and cation exchange capacity using XRD, DSC and atomic absorption spectroscopy, respectively were conducted. UV/visible spectroscopic measurements have been used to determine the amount of adsorbed dyes by zeolites. The adsorption capacities for batch method were recorded. The influential parameters, such as initial pH value of the solution, temperature, adsorbate concentration and ion exchange on the adsorption process were studied. The suitability of Langmuir and Freundlich isotherms to the equilibrium data was investigated in the solid-liquid system. In all the adsorption experiments, the variation of adsorption capacities were recorded and explained in terms of both zeolite behaviour and dyes structures. Attempts to regenerate the adsorbents physically (at high temperature) were also made and the adsorptive properties of the recovered zeolite have been provided. </span>
Adsorption,Anionic dyes,Zeolite and Egyptian kaolin
https://ejchem.journals.ekb.eg/article_1236.html
https://ejchem.journals.ekb.eg/article_1236_4665495bde8b34c55c0b9c6848c64fcd.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
56
3
2010
06
30
Synthesis and Characterization of Carbon Nanotubes Using Amorphous Alloy Catalysts
465
475
EN
10.21608/ejchem.2010.1238
<span style="font-size: xx-small;">ARC DISCHARGE method was utilized to synthesize carbon nanotubes ….. (CNTs). The arcing was carried out in air atmosphere in presence of amorphous alloy as catalyst. The current density was maintained constant during the experiment. The amorphous alloys used were CoFeB amorphous alloy and ZrCuNiAl amorphous alloy. Characterization of the samples produced indicates that the presence of CoFeB amorphous alloy much enhanced the yield of multiwall carbon nanotubes (MWNTs). In contrast, the use of ZrCuNiAl amorphous alloy exerted an opposite effect. The produced MWNTs were tested for hydrogen sorption at 20 bar. </span>
carbon nanotubes,Amorphous alloy,Hydrogen sorption
https://ejchem.journals.ekb.eg/article_1238.html
https://ejchem.journals.ekb.eg/article_1238_1dc6737830c38b16cf7de6d19b6cd71e.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
56
3
2010
08
30
Mucilage Wastes as a Source for Oils: Part I: Preparation of Anionic Surfactants
477
487
EN
10.21608/ejchem.2010.1241
<span style="font-size: xx-small;">MUCILAGE wastes are industrial by-products which are rich in …… oils. The extracted oils were characterized via spectrophotometric measurements (</span><em><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;">e.g</span></span></em><span style="font-size: xx-small;">. IR, </span><span style="font-size: xx-small;">1</span><span style="font-size: xx-small;">HNMR) and utilized in the preparation of some surface active agents. Two anionic surfactants were prepared </span><em><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;">via </span></span></em><span style="font-size: xx-small;">sulfatation by concentrated sulfuric acid and sulfonation by dry sulfur trioxide from sunflower and cotton seed oils. Yields of the prepared surfactants were 70% and 71%, respectively. </span>
The microanalysis data of (C, H, S) were estimated. In addition, the hydrophilic
<span style="font-size: xx-small;">_ </span><span style="font-size: xx-small;">lipophilic balance (HLB), surface tension, interfacial tension, wetting and foaming power and biodegradability for the prepared surfactants were evaluated. </span>
The importance of these anionic surfactants are due to their environmental friendly nature and relatively safe application to human in addition to their economical feasibility.
Biodegradation is also an important parameter which was taken into consideration. The prepared surfactants showed more than 95% degradation after 21 days that can be considered a great success for environment.
Mucilage wastes,sunflower oil,Cotton seed oil,Anionic surfactants,Sulfatation,Sulfonation and Biodegradation
https://ejchem.journals.ekb.eg/article_1241.html
https://ejchem.journals.ekb.eg/article_1241_15bb114cb56790556cc0047633c00e1a.pdf