National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Printed Cotton Fabrics with Antibacterial Properties Based on Honey Gum Containing Printing Paste Formulation
2175
2182
EN
Mohamed
Ramadan
0000-0002-4647-002X
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
amaramadan1@hotmail.com
Eman M.
El-khatib
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
dreman411@yahoo.com
Sahar
Nassar
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
nassarsahar@hotmail.com
Ahmed
Montaser
0000-0002-4884-1998
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
abohabbiba2012@gmail.com
Fayza
Kantouch
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
amontas@ncsu.edu
10.21608/ejchem.2019.18110.2105
Printed cotton fabrics using different concentration of honey gum( propolis )inside printing paste Propolis is a gum has been used as a traditional cure for various diseases due to a variety of biological activities of this folk medicine. In the present work, an attempt made to investigate antibacterial formulation. The interaction between printing paste containing propolis and cotton was confirmed using FTIR. Morphological properties and printing pigment distribution was examined using SEM. Printing color strength and fastness properties were examined. Antibacterial activity was explored against gram positive, negative and yeast. ATR/IR showed different intensities at OH region that confirm interaction between propolis and fabrics and in comparison with fabric and printed cotton without propolis. Thick coating and highly distributed fabrics was visualized at SEM images at printed cotton fabrics containing propolis. The color strength of printed cotton fabrics containing propolis was directly proportional with propolis content up to 4%. Printed cotton fabrics containing propolis showed stability at all fastness evaluations. Printed cotton fabrics containing 4% propolis showed efficient antimicrobial activity towards both gram positive and negative bacteria
Propolis,Cotton Fabrics,pigment dye,printing,Antibacterial activity,thermo-fixation
https://ejchem.journals.ekb.eg/article_58181.html
https://ejchem.journals.ekb.eg/article_58181_22ce260776375edcbdd1e21ab16a91cd.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Adsorption of the anionic dye (Diamond Fast Brown KE) from textile wastewater onto chitosan/montmorillonite nanocomposites
2183
2193
EN
M.M.
El-Defrawy
Chemistry Department, Faculty of Science, Mansoura University, Egypt
mmeldefrawy@hotmail.com
I.M.M.
Kenawy
Chemistry Department, Faculty of Science, Mansoura University, Egypt
ibrahimkenawy45@gmail.com
Elsayed
Zaki
0000-0001-7053-3169
Egyptian Petroleum Research Institute (EPRI)
chemparadise17@yahoo.com
R.M.
El-tabey
Chemistry Department, Faculty of Science, Mansoura University, Egypt
r_magdy_sci@live.com
10.21608/ejchem.2019.12467.1775
A novel nanocomposite chitosan/montmorillonite has been prepared by using two different weight ratios of nano-montmorillonite (Chs1 and Chs2). The structure of the prepared adsorbents has been characterized by Fourier transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). The adsorption kinetics and isotherm behaviors of Diamond Fast Brown KE (DFB) dye molecules onto prepared chitosan nanocomposites had been studied and compared using pseudo-first, pseudo-second, and Langmuir, Freundlich, Dubinin_Radushkevich models, respectively. The maximum adsorption capacities of DFB according to Langmuir isotherm model were 403.23 and 375.94 mg g-1 for Chs1 and Chs2, respectively. Moreover, our results indicate that the adsorption mechanism can be explained by the formation of the hydrogen bond. Based on the obtained results, Chs1 and Chs2 can be successfully applied for DFB dye removal from textile wastewater.
Chitosan,Nanocomposite,Adsorption,textile Diamond Fast Brown KE dye
https://ejchem.journals.ekb.eg/article_31531.html
https://ejchem.journals.ekb.eg/article_31531_77423d3670c2a33380cf9ed622a27b18.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Fast and Efficient RP-HPLC Method for Simultaneous Determination of Water-soluble Vitamins in Some Nutraceutical Supplements
2195
2211
EN
Ahmad
M.
Farag
0000-0003-4796-1266
Department of Chemistry, Faculty of Science, Cairo university
afarag49@yahoo.com
Mahmoud
S.
Rizk
Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt.
ms_rizk@yahoo.com
Hamdi
A.
El-Bassel
Department of Nutritional Biochemistry and Metabolism, National Nutrition Institute, Cairo, Egypt.
h.elbassel17@gmail.com
Mona
H.
Youssif
National Nutrition Institute, Cairo, Egypt
mona.hanafy83@gmail.com
10.21608/ejchem.2019.11256.1725
The purpose of this study is the development of analytical method for simultaneous determination of water-soluble vitamins (B1, B2, B3, B6, B9, B12 and vitamin C) in dietary supplement syrup, multivitamins and mineral dietary supplement syrup with iron, dietary supplement capsules and balanced supplemental nutrition for children by using gradient RP-HPLC methods with PDA detector. The separation of water-soluble vitamins was performed on waters Spherisorb ODS2 (250 mm×4.6mm, 5μm) column. The wavelength was 272 nm at room temperature and the detection limits ranged from 2.4 to 8.3 ng/µl. The average recovery was 98%-102 % and correlation coefficient (r) was 0.9992 to 1.
Water-soluble vitamins,Nutraceuticals,Dietary supplements,Gradient RP-HPLC,Photodiode array detector (PDA)
https://ejchem.journals.ekb.eg/article_35319.html
https://ejchem.journals.ekb.eg/article_35319_cff18a214f7a3bae0b17b0cfe6e2385d.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.
2213
2228
EN
Esmat
Ahmed
Abou El-Anwar
0000-0001-5947-2254
Prof. of Geochemistry Geological Sciences Dept., National Research Centre, Dokki, Giza, Egypt.
abouelanwar2004@yahoo.com
Hamed
Mekky
0000-0003-3396-3770
National Research Centre- Geology Sciences Department
mekkyhamed60@gmail.com
Wael
IBRAHEM
Abdel Wahab
Geological Sciences Dept., National Research Centre, Dokki
dr.wael.nrc@gmail.com
10.21608/ejchem.2019.11366.1728
Abstract <br /> The Duwi Formation in Qusseir-Safaga region is conformably overlain by the Qusseir variegated shales and underlain by the Dakhla shales. The studied phosphatic rocks in the Duwi Formation, is an attractive rock unit for it’s enrichment in heavy metals and U content. <br /> Mineralogically, phosphatic rocks in the Duwi Formation are mainly composed mainly of fluorapatite, in addition to minor occurrence of calcite, dolomite, gypsum, quartz, and pyrite. Geochemical data reveal that the rocks of the Duwi Formation were deposited under anoxic environments. The present study used the statistical result of the interrelation between P2O5, F and U concentrations on Egyptian phosphate samples and compared to the measured data. Uranium mostly occurs in an oxidized U 6+ state. It could be fixed with the phosphatic ion, forming secondary uranium phosphate minerals such as phosphuranylite and belovite in Qusseir region. In addition to Uranyl phosphates, uranium minerals in Safaga region contain also Uranyl carbonates and Uranyl sulfates, which had been attributed to the post-depositional U enrichment. The chemical data and index show that the phosphatic rocks in Safaga region are more enriched in the majority trace and rare earth elements, and are subjected to high chemical weathering than those in Qusseir region.
Key Words: Qusseir-Safaga,Duwi Phosphates,Fluorapatite,trace elements,Phosphuranylite
https://ejchem.journals.ekb.eg/article_35318.html
https://ejchem.journals.ekb.eg/article_35318_9dd512518f13dea8ff691f5286b8ebd3.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Nano-sized Titanium-zirconia Catalyst Modified by Sulphate as an Efficient Catalyst
2229
2243
EN
Shady
El-Dafrawy
chemistry department, faculty of science, mansoura university
shomirage@yahoo.com
10.21608/ejchem.2019.12363.1768
A series of sulphate modified titanium zirconia catalysts was set up by a sol-gel technique. All samples were calcined at several temperatures of 500, 600, and 750°C for 3h. The investigation methods of structural characteristics were used such as; thermal analysis, powder X-ray diffraction (XRD), transmission electron microscope (TEM), and Scanning electron microscope (SEM). In addition, the textural features were evaluated from low temperature adsorption of N2 at -196 oC. The measurement of surface acidity was determined with non aqueous titration of n-butylamine in acetonitrile. Peckman condensation for production of cumarin was used in testing the catalytic activity of the constructed catalysts. The photo degradation of methylene blue dye using sulphate modified zirconia titanium catalyst was investigated.
modified Titanium Zirconia catalyst,surface acidity,sol-gel method,Catalytic activity,Photodegradation
https://ejchem.journals.ekb.eg/article_32542.html
https://ejchem.journals.ekb.eg/article_32542_9e7937d77e4957788d8abd286136bca3.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Preparation and Characterization of Novel Poly(MMA-co-GMA)/Ag Nanocomposites for Biomedical Applications
2245
2252
EN
Dalia
Hanaa
Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt
dalia_hanna@yahoo.com
Ahmed
Youssef
National Research Centre, 30 El-Tahrir Street
amyoussef27@yahoo.com
Eman
El-Metwally
Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt
emiiii.ahmed@gmail.com
Magdy
Abdelaal
0000-0002-1948-6413
Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt
myabdelaal@gmail.com
10.21608/ejchem.2019.12817.1801
The current work aims at preparation of novel nanocomposite materials based on polymerization of methyl methacrylate (MMA), glycidyl methacrylate (GMA), monomers and silver nanoparticles (Ag-NPs) for biomedical applications. The fabricated poly(MMA-co-GMA)/Ag nanocomposites were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), FT-IR spectroscopy as well as the mechanical testing. The XRD and FT-IR spectra results confirmed the formation of the poly(MMA-co-GMA)/Ag nanocomposites with silver in nanoform. Furthermore, SEM indicated that the Ag-NPs had well dispersion in polymer matrix. Moreover, the prepared nanocomposites were displayed good enhancement in the thermal stability after addition of (Ag-NPs) by different ratios during polymerization process. Additionally, the antimicrobial activity of the synthesized poly(MMA-co-GMA)/Ag nanocomposites against Staphylococcus aureus, Escherichia coli, Candida albicans and Aspergillus niger as representatives for gram positive, gram negative bacteria, yeast and fungi were investigated. Thus, poly(MMA-co-GMA)/Ag nanocomposites were concluded as good candidates for biomedical applications.
PMMA,PGMA,SLIVER NANOPARTICLES,Nanocomposites,Antimicrobial properties,SEM,XRD
https://ejchem.journals.ekb.eg/article_33491.html
https://ejchem.journals.ekb.eg/article_33491_99517a88481288a6805d13ef44b939be.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Synthesis and Application of New Reactive Disperse Dyes Based on Isatin Derivatives and their Antibacterial Activity
2253
2264
EN
Mervat
El-Sedik
Textile Research Division, National Research Centre, Egypt
mervatelsedik@yahoo.com
Saadia
Abd Elmegied
Textile Research Division, National Research Centre, Egypt
sa_abdelraoof@yahoo.com
Tarek
Aysha
0000-0001-5632-1426
Textile Research Division, National Research Centre, Egypt
tarekaysha@hotmail.com
Safia
Mahmoud
Textile Research Division, National Research Centre, Egypt
sofyalie@yahoo.com
10.21608/ejchem.2019.12976.1810
A new two reactive disperse dyes based on a hybrid structure of isatin and benzanthrone or anthraquinone via 1, 3, 5 triazine spacer were prepared. The prepared compounds were characterized by 1H-NMR, mass spectrometry and elemental analysis. The UV/vis absorption spectra and emission spectra were measured in N, N-dimethylformamide (DMF) solution at room temperature, the effects of substituent's on the emission spectra of these compounds were interpreted. The dyeing application of the prepared dyes on wool and polyamide-6 fabrics at various concentrations of dye and different pH were investigated as well as the exhaustion and dye fixation were studied. The antibacterial activity of the prepared reactive disperse dyes were studied against different kind of bacteria such as Staphylococcus aureus (Gram-positive bacteria) and Escherichia coli (Gram-negative bacteria). The antibacterial affinity of the prepared dyes was exhibit a significant effect compared with selected antibiotics as reference standard. The fastness properties of the dyed fabrics were studied which showing excellent wash fastness, rubbing and perspiration fastness as well as high stability to light.
Reactive disperse dyes,dyeing,polyamide,wool,Antibacterial
https://ejchem.journals.ekb.eg/article_33493.html
https://ejchem.journals.ekb.eg/article_33493_9538a79f636400b29b6b61668435293d.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Silica sulfuric acid / ethylene glycol: An Efficient Eco-friendly Catalyst for One-pot Synthesis of Tricyclic and Tetarcyclic Dihydropyrimidine Derivatives.
2265
2276
EN
Nagwa
Abdelazeem
https://orcid.org/00
Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt.
nagwamorad@yahoo.com
Wahid
Basyouni
Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt.
w_basyouni2002@yahoo.com
Samir
Abbas
Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt.
samiryoussef98@yahoo.com
Khairy
El-Bayouki
Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt.
khelbayouki@yahoo.com
Mohamed
El-kady
Chemistry Department, Faculty of Science, Ain Shams University
samiryoussef@rocketmail.com
10.21608/ejchem.2019.13142.1827
A simple and efficient eco-friendly chemical procedures were developed for the synthesis of series of tricyclic and tetarcyclic dihydropyrimidine derivatives in excellent yields via a one-pot, multi-component reaction in the presence of silica sulfuric acid / ethylene glycol catalyst. The Tricyclic dihydropyrimidine derivatives 1a-g (benzo[4,5]imidazo[1,2-a]pyrimidine derivatives) were synthesized in high yields and high purity with short reaction times by reacting 2-aminobenzimidazole, aldehydes and ethyl acetoacetate. Also, the tetracyclic dihydropyrimidine derivatives 3a-f (benzo[4,5]imidazo[1,2-a]pyrimido[4,5-d]pyrimidin-4(1H)-one derivatives) were synthesized by the reaction of 2-aminobenzimidazole, aldehydes and cyanoacetamide. This present new protocol offers shorter reaction time, high yields and low cost. This method provides much improved protocol over the existing methods.
Silica sulfuric acid/ethylene glycol,Dihydropyrimidine derivatives Benzo[4,5]imidazo[1,2-a]pyrimidine,2-Aminobenzimidazole
https://ejchem.journals.ekb.eg/article_34213.html
https://ejchem.journals.ekb.eg/article_34213_d9ba7f272743ac42a32a0cea2219535a.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Carbon xerogel/Carbon Nanotubes Nanohybrid Doped with Ti for Removal of Methylene Blue Dye
2277
2288
EN
Nady
A
Fathy
0000-0002-6522-1053
Physical Chemistry, Inorganic chemical industries division, National Research Centre,
fathyna.77@hotmail.com
Sahar
Mohamed
Elkhouly
National Research Centre
sm_elkhouly@yahoo.com
Reham
Aboelenin
National Research Centre
reham.aboelenin@yahoo.com
10.21608/ejchem.2019.12870.1803
A facile technology for decorating carbon xerogel (CX) with carbon nanotubes (CNTs) to prepare carbonaceous nanohybrid (CX-CNTs) was simultaneously implemented during carbonization of resorcinol-formaldehyde xerogel at 1123K meanwhile camphor as carbon nanotubes source is heated at 523K. Then the prepared CX-CNTs hybrid is doped with tetrabutyl orthotitanate as a titanium (Ti) precursor giving CX-CNTs-Ti nanohybrid used as an efficient photocatalyst. The morphology and textural properties of the samples were investigated using field-emission scanning electron microscope (FE-SEM), High resolution transmission electron microscopy (TEM) and N2 adsorption-desorption isotherm at 77K. The adsorption and photocatalytic properties of these samples toward methylene blue dye (MB) were performed. FE-SEM and TEM approved the formation of CNTs over the surface of CX and the developed nanohybrids have mesoporous structures. The adsorption efficiency of CX-CNTs and CX-CNTs-Ti samples was found to be 70 and 86.8% along 180 min, respectively. Under visible irradiation, the removal efficiency of CX-CNTs and CX-CNTs-Ti is enhanced to 90 and 99% at 60 min, respectively. Thus, CX-CNTs-Ti nanohybrid exhibited superior adsorptivity and photoactivity for removing MB dye as a result of the presence of Ti particles over CX-CNTs matrix. Doping CX-CNTs with Ti particles led to a decrease in the specific surface area and to enhance in both the total pore volume and amount of wider pores. Therefore, the reported CX-CNTs-Ti nanohybrid exhibits as an effective adsorbent and photocatalyst toward the removal of the MB dye from their aqueous solutions.
Carbon xerogel,carbon nanotubes,Nanohybrid,Titanium,Adsorption,photocatalysis
https://ejchem.journals.ekb.eg/article_33678.html
https://ejchem.journals.ekb.eg/article_33678_a535f247f2c58a2ccefb9cc5cebe866d.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Flow ability Enhancement of Waxy Crude Oil Using New Spirocompound based on Aromatic Amine System
2289
2301
EN
Ahmed
Al-Sabagh
Egyptian petroleum research institute, Nasr city, Cairo, Egypt
alsabaghh@gmail.com
Tahany
Mahmoud
Petroleum application department , Egyptian Petroleum Research Institute
tahany.mahmoud.a@gmail.com
Maher
Helmy
Helal
Faculty of Science , Helwan University
toto.mood@yahoo.com
Abd Ellatif
Abd Elrahman
Egyptian Petroleum Research Institute
sabaghh@epri.sci.eg
Amira
E. M. Abdallah
Faculty of science , Helwan university
amira.sayed34@hotmail.com
Mona
El-Rayes
Egyptian Petroleum Research Institute
mona.rayes@yahoo.com
10.21608/ejchem.2019.11135.1714
This work was focused on an investigating of flow ability of waxy crude oil by nontraditional polymer compound. For this propose, a spirocompound consisted of benzaldehyede and triethanolamine 6,6'-(((phenylmethylene) bis (oxy)) bis (ethane-2,1-diyl)) bis (2-phenyl-1,3,6-dioxazocane) [SB] was synthesized using zeolite as a catalyst. The chemical structure of the [SB] was investigated by FT-IR, TGA,GPC, H1NMR and Mass spectroscopy. The rheological behavior and pour point depression of waxy crude oil were also studied different dosages and temperatures. The results showed a significant reduction in the viscosity at different temperatures and dosages. Moreover, it was noticed a decrease in the apparent viscosity and the Bingham yield value for [SB] 437.7, 367.1, and 307.1 cp and 0.48, 0.39 and 0.31 Pa at 15 ºC, 20 ºC and 30 ºC and concentration 1000 ppm respectively. While the blank experiment displayed 743.1, 694.2 and 607.2 cp and 0.74, 0.69 and 0.60 Pa at the same temperatures. This study included blends between [SB] and the acrylate based polymers abbreviated as (B1, B2, B3 and B4). Furthermore, the rheological behavior and the pour point for these blends exhibited that the blend [B4] shew more reduction in the apparent viscosity than [SB] being alone. The apparent viscosity and yield value for [B4] were; 267.8, 249.2 and 212.7 cp and 0.22, 0.11 and 0.09 Pa at 15ºC, 20ºC and 30ºC and concentration 1000 ppm respectively. The pour point depression (Δpp) of [SB] was 9ºC while the blank pour point was 27 º C and the B4 was achieved the maximum depression in the pour point (Δpp= 18 º C) at a concentration of 1000 ppm. This result means that the addition of [SB] to [B4] showed the most positive synergistic effect.
Spiro compound,Wax Crude Oil,Pour Point,rheology,Physical Blends
https://ejchem.journals.ekb.eg/article_32497.html
https://ejchem.journals.ekb.eg/article_32497_0d7f0f7da4827185d57221a63ca5e8ed.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Fate of Heavy Metals in Selective Vegetable Plants Irrigated with Primary Treated Sewage Water at Slightly Alkaline Medium
2303
2312
EN
Hussein
Abdel-Shafy
0000-0002-3381-2617
Water Pollution Research Department, National Research Centre, Dokki, Cairo, Egypt
hshafywater@yahoo.com
Mohamed A.
El-Khateeb
Water Pollution Research Department, National Research Centre, Dokki, Cairo, Egypt
10.21608/ejchem.2019.10688.1696
It is well known that pH is the controlling factor for solubility of metals, which is affected by the “law of chemical solubility product constant” (ChSP). The present investigation focuses on the fate of heavy metals resulted from the use of primary treated sewage water for irrigating edible plant in a local sewage farm. The studied plants are maize, green beans, and alfalfa. Extensive sampling program was designed to collect both irrigated water and plant samples every two weeks. The plant samples were partitioned into roots, stems, and leaves, as well as the grains of maize and been plants. The physical and chemical characteristics of irrigated water were determined. Level of heavy metals in sewage water and all plant samples was determined. It was found that the availability of metals to plant is, generally, governed by the law of ChSP constant. In present study, the pH of both irrigated water and the soil were within the slight alkaline medium which restricted the solubility of metals. Thus, negative impact on the accumulation of metals by the irrigated plants was detected. The level of metals in all the studied plant parts was within the permissible limits according to the WHO, FAO and the Egyptian regulations. This is mainly attributed to the limited solubility of metals at the slight alkaline medium according to the law ChSP constant. It was thus concluded that the availability of metals from both irrigated waters and soils were greatly restricted and controlled by the pH value. This explains the limited accumulation of metals by all studied plants. However, log-term irrigation with sewage will certainly result in a dramatic accumulation of metals by both soil and plants. It was recommended to restrict the reuse of disinfected tertiary treated water for irrigating vegetable plants according to the local regulations.
heavy metals accumulation by plants,low of chemical solubility product,sewage irrigation,vegetable plants,alkaline sewage water
https://ejchem.journals.ekb.eg/article_48811.html
https://ejchem.journals.ekb.eg/article_48811_db63a06e7d111ab4c644cf152ca76a96.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Low-cost Bio-Adsorbent Based on Amorphous Carbon Thin Film/Chitosan Composite for Removal of Methylene Blue Dye from Aqueous Solutions: Kinetic and Isotherm
2313
2329
EN
Mohamed
Elsayed
Keshawy
Petroleum applications department, Egyptian Petroleum Research Institute, Cairo, Egypt.
elkeshawy2006@yahoo.com
Mahmoud
Fathy
Petroleum Applications Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt
fathy8753@yahoo.com
Amany
Gaffer
0000-0003-0713-5507
Petroleum Applications Department,Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt
amany_jaffer@hotmail.com
Rasha
Hosny
0000-0002-6761-4424
Production Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt
dr.rashahosny@yahoo.com
Thanaa
Abdel Moghny
Petroleum Applications Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt.
thanaa_h@yahoo.com
10.21608/ejchem.2019.10428.1685
In this article, we focused on using low cost bio-adsorbents such as chitosan from shrimp & crabs shells waste and amorphous carbon thin film ACTF from micro crystalline cellulose waste to prepare a new composite (ACTF/C) for removal of methylene blue (MB) dye from aqueous solution. ACTF/C composite was prepared via a novel ultrasonic co precipitation method instead of traditional chemical vapour deposition (CVD) method. The morphological and structural descriptions are performed using XRD, FTIR, TEM, TGA, SAED and SEM analysis. The analysis results showed that ACTF/C composite was prepared successfully. The effects of several parameters such as adsorbent doses (0.05–0.2 g/100 ml), temperatures (25–45 oC), initial solution pH (3–9), dye concentrations (10,25, 50, and 100 ppm) and contact time (20-80 min) on the adsorption process were examined. The kinetics, thermodynamic analyses and adsorption isotherm models were examined to estimate the empirical results. The empirical facts are properly equipped with the Langmuir isotherm (R2 = 0.997), giving an absorption capacity of more than 85 mgg-1. From kinetic details, we found that adsorption of methylene blue day across ACTF/C composite is represented by pseudo second-order model. In general, these outcomes suggest that the new ACTF/C composite provides great potential to get rid of methylene blue dye from contaminated water
ACTF/Chitosan composite,Ultrasonic co Precipitation,Adsorption,Methylene blue dye,kinetic
https://ejchem.journals.ekb.eg/article_33649.html
https://ejchem.journals.ekb.eg/article_33649_17ba69f54012514b9de3bedd339f0283.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Compressive Strength of Geopolymeric Cubes Produced from Solid Wastes of Alum Industry and Drinking Water Treatment Plants
2331
2340
EN
mohamed
abdelmawla
Dohim
0000-0002-3986-6915
Environmental Science Dept., Faculty of Science, Port Said University, Port Said Gov., Egypt
mohamed.abdelmawla.eg@gmail.com
Ahmed
Abdelaal
Environmental Science Department, Faculty of Science, Port Said University, Port said Gov., Egypt.
ak_elmalt@yahoo.com
Mokhtar
Samy
Beheary
Environmental Sciences Dep., Faculty of Science, Port Said University, Port Said Gov., Egypt
beheary@hotmail.com
Nabil
Ahmed
Abdullah
0000 0002 6969 5942
Research, Development and Scientific Services Dept., Egyptian Co. for Aluminum Sulfate, Kaliobeya Gov., Egypt
nabilxp9@gmail.com
taha
Mohamed
A. Razek
Basic Science Dept., Environmental Studies and Researches Institute, Ain shams University, Cairo, Egypt
taha.rarek@yahoo.com
10.21608/ejchem.2019.12745.1790
In this work, geopolymer is produced from two by-products waste as an alternative environmentally green construction and building materials without using Ordinary Portland Cement (OPC). Water Treatment Sludge (WTS) from Marg Drinking Water Treatment Plants in Cairo and De-Aluminated Kaolin (DAK) from Egyptian Company for Aluminum Sulfate were used in this study. Sodium hydroxide (NaOH)solution was used as an alkaline activator. The effect of the various influential factors on the compressive strengths of WTS/DAK geopolymer was investigated. These factors are mixing ingredient (WTS/DAK) ratios and amounts of NaOH of different normality. The mineralogical and chemical compositions of the WTS/DAK wastes were obtained using X-ray Diffraction (XRD) and X-ray Fluorescence (XRF) analyses. Results show that the optimum ingredients providing maximum strength are the Na2O/SiO2 ratio of 0.56 and WTS/DAK ratio of 30:70. The development of compressive strengths over curing time of WTS/DAK geopolymer samples at optimum ingredients (30:70 WTS/DAK, 60 g NaOH 10 N and 70 oC for 72 hours). The compressive strength of WTS/DAK geopolymer gives 17 MPa after 7 days and increased to the maximum strength of 22 MPa at 28 days. The compressive strengths obtained to comply with the Egyptian Industrial Standards. Moreover, the WTS that traditionally disposed into landfills or drainage canals can be used sustainably in developing cement-free geopolymers with economic and environmental significance.
Geopolymer,Water treatment sludge,Dealuminated Kaolin,Compressive strength,aluminum sulfate,environment
https://ejchem.journals.ekb.eg/article_33832.html
https://ejchem.journals.ekb.eg/article_33832_e7221a8f70873a6881dbf74598841394.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Vapour Phase Transfer Printing of Polyester Fabrics
2341
2349
EN
Madiha
Elkashouty
Nrc
m_elkashouty@hotmail.com
Shimaa
Elhadad
NRC - department of dyeing and printing -
shimaa.elhadad@yahoo.com
Hamada
Mashaly
Dyeing, Printing and Auxiliaries Department, Textile Research Division, National Research Centre, Cairo 12622, Egypt
hamada_mashaly@yahoo.com
Hanan
Elsayad
National Research Centre- dyeing and printing department
elsayad_hanan@yahoo.com
10.21608/ejchem.2019.10073.1676
Transfer printing of polyester fabrics using disperse dye vapors is performed by contacting the un-dyed polyester fabrics (receptor) with other heavily dyed polyester fabrics (donor) under the influence of heat and pressure, a technique well known as heat transfer printing. The evolved disperse dye vapors will flow across the small air gap existing between the inner donor and receptor surfaces. Studies revealed that the dye uptake by the receptor fabrics is dependent on the original disperse dye content of the donor fabrics as well as, the transfer printing conditions, (temperature, time). Subsequently the released dye from the donor fabrics strongly depend on the amount of dye present originally. It was proved also that the dyed polyester donor fabrics could be used multiple times producing prints having similar color strength values to a certain extent. The possibility of application of the process as continuous process was also investigated. The color fastness and mechanical properties of the prints were assessed and found to be acceptable.
Disperse dyes,polyester,printing,dyeing and fastness properties
https://ejchem.journals.ekb.eg/article_33498.html
https://ejchem.journals.ekb.eg/article_33498_69c9a1c280646ba2f3450cb02320fc90.pdf
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
62
12
2019
12
01
Evaluate the Impact of UVB Radiation on Different High Performance Fabrics Treated with Nanomaterials
2351
2360
EN
Dooa H.
Elgohary
0000-0002-7272-912X
Department of Spinning and Weaving Engineering, Textile Research Division, National Research Centre, 33 El Bohouth st. (Former El Tahrir St.), Dokki, P.O.12622, Giza, Egypt.
d_ego44@hotmail.com
Y.A
Abo El Amaim
Spinning and Weaving Department, Faculty of Applied Arts, Beni Suef University, P.O.62512, Beni Suef, East of the Nile
engsamaim2000@hotmail.com
Ghada M.
Taha
0000-0003-4364-3957
Preparation and Finishing of Cellulosic Fiber Dept., Textile Research Division, National Research Centre, 33 El Bohouth st. (Former El Tahrir St.), Dokki, P.O.12622, Giza, Egypt.
ghadasci@yahoo.com
Sameh
M. Reda
Photometry and Radiometry Division, National Institute of Standards, NIS, Zaeem Anwar ElSadat, Harm , Giza, Egypt,
egyreda@outlook.com
10.21608/ejchem.2019.11040.1709
This paper summaries the evaluation of using two different nano-particles as UV blocking standard materials for treatment of hi-performance fabrics after UVB exposure. Six woven samples are manufactured using three different weave structure (Twill 2/2, Satin 5, and Weft backed structure), two different high tenacity weft yarn count and materials (polyester and polypropylene) are used. Titanium dioxide - Zinc oxide nano-particles are used as a treated materials to reduce the effect of UVB radiations, after that the samples were exposed to UVB breaking strength and tear strength are performed according to standard test methods to estimate the fabrics performance. The data are statistically analyzed and evaluated for the six samples using t-test for mechanical properties. Scanning electron microscope and ultraviolet protection factor (UPF) are done for samples before and after treatment. The results of Ultraviolet protection factor test shows that nano-titanium oxide material has a better coating treatment than nano-zinc oxide.
UV Radiation,High Tenacity Yarns,High performance,Nanomaterials,Breaking Strength,Tear Strength
https://ejchem.journals.ekb.eg/article_33490.html
https://ejchem.journals.ekb.eg/article_33490_211be7c175dc34478bd634a8d8c2378a.pdf