eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2175
2182
10.21608/ejchem.2019.18110.2105
58181
Original Article
Printed Cotton Fabrics with Antibacterial Properties Based on Honey Gum Containing Printing Paste Formulation
Mohamed Ramadan
amaramadan1@hotmail.com
1
Eman M. El-khatib
dreman411@yahoo.com
2
Sahar Nassar
nassarsahar@hotmail.com
3
Ahmed Montaser
abohabbiba2012@gmail.com
4
Fayza Kantouch
amontas@ncsu.edu
5
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
Textile Research Division, National Research Centre, Cairo, Giza, Egypt.
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
https://ejchem.journals.ekb.eg/article_58181_22ce260776375edcbdd1e21ab16a91cd.pdf
Propolis
Cotton Fabrics
pigment dye
printing
Antibacterial activity
thermo-fixation
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2183
2193
10.21608/ejchem.2019.12467.1775
31531
Original Article
Adsorption of the anionic dye (Diamond Fast Brown KE) from textile wastewater onto chitosan/montmorillonite nanocomposites
M.M. El-Defrawy
mmeldefrawy@hotmail.com
1
I.M.M. Kenawy
ibrahimkenawy45@gmail.com
2
Elsayed Zaki
chemparadise17@yahoo.com
3
R.M. El-tabey
r_magdy_sci@live.com
4
Chemistry Department, Faculty of Science, Mansoura University, Egypt
Chemistry Department, Faculty of Science, Mansoura University, Egypt
Egyptian Petroleum Research Institute (EPRI)
Chemistry Department, Faculty of Science, Mansoura University, Egypt
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.
https://ejchem.journals.ekb.eg/article_31531_77423d3670c2a33380cf9ed622a27b18.pdf
Chitosan
Nanocomposite
Adsorption
textile Diamond Fast Brown KE dye
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2195
2211
10.21608/ejchem.2019.11256.1725
35319
Original Article
Fast and Efficient RP-HPLC Method for Simultaneous Determination of Water-soluble Vitamins in Some Nutraceutical Supplements
Ahmad Farag
afarag49@yahoo.com
1
Mahmoud Rizk
ms_rizk@yahoo.com
2
Hamdi El-Bassel
h.elbassel17@gmail.com
3
Mona Youssif
mona.hanafy83@gmail.com
4
Department of Chemistry, Faculty of Science, Cairo university
Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt.
Department of Nutritional Biochemistry and Metabolism, National Nutrition Institute, Cairo, Egypt.
National Nutrition Institute, Cairo, Egypt
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.
https://ejchem.journals.ekb.eg/article_35319_cff18a214f7a3bae0b17b0cfe6e2385d.pdf
Water-soluble vitamins
Nutraceuticals
Dietary supplements
Gradient RP-HPLC
Photodiode array detector (PDA)
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2213
2228
10.21608/ejchem.2019.11366.1728
35318
Original Article
P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.
Esmat Abou El-Anwar
abouelanwar2004@yahoo.com
1
Hamed Mekky
mekkyhamed60@gmail.com
2
Wael Abdel Wahab
dr.wael.nrc@gmail.com
3
Prof. of Geochemistry Geological Sciences Dept., National Research Centre, Dokki, Giza, Egypt.
National Research Centre- Geology Sciences Department
Geological Sciences Dept., National Research Centre, Dokki
Abstract 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. 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.
https://ejchem.journals.ekb.eg/article_35318_9dd512518f13dea8ff691f5286b8ebd3.pdf
Key Words: Qusseir-Safaga
Duwi Phosphates
Fluorapatite
trace elements
Phosphuranylite
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2229
2243
10.21608/ejchem.2019.12363.1768
32542
Original Article
Nano-sized Titanium-zirconia Catalyst Modified by Sulphate as an Efficient Catalyst
Shady El-Dafrawy
shomirage@yahoo.com
1
chemistry department, faculty of science, mansoura university
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.
https://ejchem.journals.ekb.eg/article_32542_9e7937d77e4957788d8abd286136bca3.pdf
modified Titanium Zirconia catalyst
surface acidity
sol-gel method
Catalytic activity
Photodegradation
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2245
2252
10.21608/ejchem.2019.12817.1801
33491
Original Article
Preparation and Characterization of Novel Poly(MMA-co-GMA)/Ag Nanocomposites for Biomedical Applications
Dalia Hanaa
dalia_hanna@yahoo.com
1
Ahmed Youssef
amyoussef27@yahoo.com
2
Eman El-Metwally
emiiii.ahmed@gmail.com
3
Magdy Abdelaal
myabdelaal@gmail.com
4
Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt
National Research Centre, 30 El-Tahrir Street
Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt
Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt
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.
https://ejchem.journals.ekb.eg/article_33491_99517a88481288a6805d13ef44b939be.pdf
PMMA
PGMA
SLIVER NANOPARTICLES
Nanocomposites
Antimicrobial properties
SEM
XRD
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2253
2264
10.21608/ejchem.2019.12976.1810
33493
Original Article
Synthesis and Application of New Reactive Disperse Dyes Based on Isatin Derivatives and their Antibacterial Activity
Mervat El-Sedik
mervatelsedik@yahoo.com
1
Saadia Abd Elmegied
sa_abdelraoof@yahoo.com
2
Tarek Aysha
tarekaysha@hotmail.com
3
Safia Mahmoud
sofyalie@yahoo.com
4
Textile Research Division, National Research Centre, Egypt
Textile Research Division, National Research Centre, Egypt
Textile Research Division, National Research Centre, Egypt
Textile Research Division, National Research Centre, Egypt
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.
https://ejchem.journals.ekb.eg/article_33493_9538a79f636400b29b6b61668435293d.pdf
Reactive disperse dyes
dyeing
polyamide
wool
Antibacterial
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2265
2276
10.21608/ejchem.2019.13142.1827
34213
Silica sulfuric acid / ethylene glycol: An Efficient Eco-friendly Catalyst for One-pot Synthesis of Tricyclic and Tetarcyclic Dihydropyrimidine Derivatives.
Nagwa Abdelazeem
nagwamorad@yahoo.com
1
Wahid Basyouni
w_basyouni2002@yahoo.com
2
Samir Abbas
samiryoussef98@yahoo.com
3
Khairy El-Bayouki
khelbayouki@yahoo.com
4
Mohamed El-kady
samiryoussef@rocketmail.com
5
Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt.
Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt.
Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt.
Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt.
Chemistry Department, Faculty of Science, Ain Shams University
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.
https://ejchem.journals.ekb.eg/article_34213_d9ba7f272743ac42a32a0cea2219535a.pdf
Silica sulfuric acid/ethylene glycol
Dihydropyrimidine derivatives Benzo[4,5]imidazo[1,2-a]pyrimidine
2-Aminobenzimidazole
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2277
2288
10.21608/ejchem.2019.12870.1803
33678
Original Article
Carbon xerogel/Carbon Nanotubes Nanohybrid Doped with Ti for Removal of Methylene Blue Dye
Nady Fathy
fathyna.77@hotmail.com
1
Sahar Elkhouly
sm_elkhouly@yahoo.com
2
Reham Aboelenin
reham.aboelenin@yahoo.com
3
Physical Chemistry, Inorganic chemical industries division, National Research Centre,
National Research Centre
National Research Centre
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.
https://ejchem.journals.ekb.eg/article_33678_a535f247f2c58a2ccefb9cc5cebe866d.pdf
Carbon xerogel
carbon nanotubes
Nanohybrid
Titanium
Adsorption
photocatalysis
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2289
2301
10.21608/ejchem.2019.11135.1714
32497
Original Article
Flow ability Enhancement of Waxy Crude Oil Using New Spirocompound based on Aromatic Amine System
Ahmed Al-Sabagh
alsabaghh@gmail.com
1
Tahany Mahmoud
tahany.mahmoud.a@gmail.com
2
Maher Helal
toto.mood@yahoo.com
3
Abd Ellatif Abd Elrahman
sabaghh@epri.sci.eg
4
Amira E. M. Abdallah
amira.sayed34@hotmail.com
5
Mona El-Rayes
mona.rayes@yahoo.com
6
Egyptian petroleum research institute, Nasr city, Cairo, Egypt
Petroleum application department , Egyptian Petroleum Research Institute
Faculty of Science , Helwan University
Egyptian Petroleum Research Institute
Faculty of science , Helwan university
Egyptian Petroleum Research Institute
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.
https://ejchem.journals.ekb.eg/article_32497_0d7f0f7da4827185d57221a63ca5e8ed.pdf
Spiro compound
Wax Crude Oil
Pour Point
rheology
Physical Blends
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2303
2312
10.21608/ejchem.2019.10688.1696
48811
Original Article
Fate of Heavy Metals in Selective Vegetable Plants Irrigated with Primary Treated Sewage Water at Slightly Alkaline Medium
Hussein Abdel-Shafy
hshafywater@yahoo.com
1
Mohamed A. El-Khateeb
2
Water Pollution Research Department, National Research Centre, Dokki, Cairo, Egypt
Water Pollution Research Department, National Research Centre, Dokki, Cairo, Egypt
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.
https://ejchem.journals.ekb.eg/article_48811_db63a06e7d111ab4c644cf152ca76a96.pdf
heavy metals accumulation by plants
low of chemical solubility product
sewage irrigation
vegetable plants
alkaline sewage water
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2313
2329
10.21608/ejchem.2019.10428.1685
33649
Original Article
Low-cost Bio-Adsorbent Based on Amorphous Carbon Thin Film/Chitosan Composite for Removal of Methylene Blue Dye from Aqueous Solutions: Kinetic and Isotherm
Mohamed Keshawy
elkeshawy2006@yahoo.com
1
Mahmoud Fathy
fathy8753@yahoo.com
2
Amany Gaffer
amany_jaffer@hotmail.com
3
Rasha Hosny
dr.rashahosny@yahoo.com
4
Thanaa Abdel Moghny
thanaa_h@yahoo.com
5
Petroleum applications department, Egyptian Petroleum Research Institute, Cairo, Egypt.
Petroleum Applications Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt
Petroleum Applications Department,Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt
Production Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt
Petroleum Applications Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt.
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
https://ejchem.journals.ekb.eg/article_33649_17ba69f54012514b9de3bedd339f0283.pdf
ACTF/Chitosan composite
Ultrasonic co Precipitation
Adsorption
Methylene blue dye
kinetic
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2331
2340
10.21608/ejchem.2019.12745.1790
33832
Compressive Strength of Geopolymeric Cubes Produced from Solid Wastes of Alum Industry and Drinking Water Treatment Plants
mohamed Dohim
mohamed.abdelmawla.eg@gmail.com
1
Ahmed Abdelaal
ak_elmalt@yahoo.com
2
Mokhtar Beheary
beheary@hotmail.com
3
Nabil Abdullah
nabilxp9@gmail.com
4
taha A. Razek
taha.rarek@yahoo.com
5
Environmental Science Dept., Faculty of Science, Port Said University, Port Said Gov., Egypt
Environmental Science Department, Faculty of Science, Port Said University, Port said Gov., Egypt.
Environmental Sciences Dep., Faculty of Science, Port Said University, Port Said Gov., Egypt
Research, Development and Scientific Services Dept., Egyptian Co. for Aluminum Sulfate, Kaliobeya Gov., Egypt
Basic Science Dept., Environmental Studies and Researches Institute, Ain shams University, Cairo, Egypt
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.
https://ejchem.journals.ekb.eg/article_33832_e7221a8f70873a6881dbf74598841394.pdf
Geopolymer
Water treatment sludge
Dealuminated Kaolin
Compressive strength
aluminum sulfate
environment
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2341
2349
10.21608/ejchem.2019.10073.1676
33498
Original Article
Vapour Phase Transfer Printing of Polyester Fabrics
Madiha Elkashouty
m_elkashouty@hotmail.com
1
Shimaa Elhadad
shimaa.elhadad@yahoo.com
2
Hamada Mashaly
hamada_mashaly@yahoo.com
3
Hanan Elsayad
elsayad_hanan@yahoo.com
4
Nrc
NRC - department of dyeing and printing -
Dyeing, Printing and Auxiliaries Department, Textile Research Division, National Research Centre, Cairo 12622, Egypt
National Research Centre- dyeing and printing department
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.
https://ejchem.journals.ekb.eg/article_33498_69c9a1c280646ba2f3450cb02320fc90.pdf
Disperse dyes
polyester
printing
dyeing and fastness properties
eng
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
Egyptian Journal of Chemistry
0449-2285
2357-0245
2019-12-01
62
12
2351
2360
10.21608/ejchem.2019.11040.1709
33490
Original Article
Evaluate the Impact of UVB Radiation on Different High Performance Fabrics Treated with Nanomaterials
Dooa H. Elgohary
d_ego44@hotmail.com
1
Y.A Abo El Amaim
engsamaim2000@hotmail.com
2
Ghada M. Taha
ghadasci@yahoo.com
3
Sameh M. Reda
egyreda@outlook.com
4
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.
Spinning and Weaving Department, Faculty of Applied Arts, Beni Suef University, P.O.62512, Beni Suef, East of the Nile
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.
Photometry and Radiometry Division, National Institute of Standards, NIS, Zaeem Anwar ElSadat, Harm , Giza, Egypt,
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.
https://ejchem.journals.ekb.eg/article_33490_211be7c175dc34478bd634a8d8c2378a.pdf
UV Radiation
High Tenacity Yarns
High performance
Nanomaterials
Breaking Strength
Tear Strength