ORIGINAL_ARTICLE
Synthesis, Spectroscopic and Antimicrobial Studies of Some Simple Thiomorpholide−Schiff`s base Congeners
A set of eight thiomorpholide-hydrazone conjugates 6a-g and 7 was prepared in good yield by sequential Willgerodt-Kindler reaction on 4-aminoacetophenone then condensation with the considered aromatic aldehydes. The molecular fragmentation of these conjugates by EIMS was interpreted. Structure elucidation of these derivatives was further studied using 1H NMR, COSY, 13C NMR, Dept135 and HSQC techniques. The preferred conformation of the morpholine ring was assigned as the 4C1 conformation. The COSY spectrum of compound 6c showed abnormal deshielding of the N(CH2)2 over the O(CH2)2 protons which was explained. In vitroantimicrobial screening of these congeners with standard antibiotics disclosed their moderate activity against E. coli, S. aureus and C. albicans.
https://ejchem.journals.ekb.eg/article_22495_0680233727e6d8f7715f4bd682c92ae0.pdf
2019-06-01
977
989
10.21608/ejchem.2018.6165.1517
Willgerodt-Kindler
Thiomorpholide
hydrazone
spectroscopy
antimicrobial activity
Mona
Jaranabi Al-Malki
muna.awwad.m@gmail.com
1
Chemistry Department, Faculty of Science, Taif University, 21974-Hawyah-Taif, Kingdom of Saudi Arabia,
AUTHOR
Nehad
Abdel Latif
nehad_km@yahoo.com
2
Natural Products Chemistry, Chemistry of Natural Compounds Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, National Research Centre , Dokki, Cairo, Egypt.
LEAD_AUTHOR
Mohamed
El Sayed Alya
mrea34@hotmail.com
3
Chemistry Department, Faculty of Science, Port Said University, 42522-Port Said, Egypt
AUTHOR
ORIGINAL_ARTICLE
Mapping the Molecular Electrostatic Potential of Fullerene
Fullerene (C60) as well as fullerene based systems show unique properties dedicating them for many applications. Accordingly, the present work carried out to study the molecular electrostatic potential ESP of C60. C60 and their decorated ZnO and OZn interacted with halides as XOZn where X is the halides F; Cl and Br respectively. The studied structures calculated at density functional theory level at B3LYP/6-31g*. Electrostatic potential ESP is a perfect indication and identification for possible sites representing the electrophilic and/or nucleophilic attack. Throughout the ESP, it is easy to map then drive the ability of the studied fullerene for reactivity through the interaction with its surrounding structures by forming bonding and/or forming surface. The ESP in this work is utilized as a test for reactivity. The mapped contours of the studied C60 and its decorated structures show that, the distribution of charges and the electrostatic contour affected by decoration, which dedicated the decorated C60 for several applications.
https://ejchem.journals.ekb.eg/article_25474_21f8903f269ad17dd1df8a0fcd416b90.pdf
2019-06-01
991
1002
10.21608/ejchem.2019.5353.1472
C60
Decorated C60
B3LYP/6-31g*
ESP
H.
Ezzat
1
National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt.
AUTHOR
R.
Badry
2
Physics Department, Faculty of Women for Arts, Science and Education, Ain Shams University, 11757 Cairo, Egypt.
AUTHOR
I.S.
Yahia
3
Advaned Functional Materials & Optoelectronic Laboratory (AFMOL), Physics Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia.
AUTHOR
H.Y.
Zahran
4
Advaned Functional Materials & Optoelectronic Laboratory (AFMOL), Physics Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia.
AUTHOR
A.
Ibrahim
5
Physics Department, Faculty of Women for Arts, Science and Education, Ain Shams University, 11757 Cairo, Egypt.
AUTHOR
H.
Elhaes
6
Physics Department, Faculty of Women for Arts, Science and Education, Ain Shams University, 11757 Cairo, Egypt.
AUTHOR
Medhat
Ibrahim
medahmed6@yahoo.com
7
Spectroscopy Department, National Research Centre, 33 El-Bohouth Str. 12622 Dokki, Giza, Egypt.
LEAD_AUTHOR
ORIGINAL_ARTICLE
Eco-Friendly Surface Treatment of Cotton Fabric Using Silver Nanoparticles
The utilization of high performance textiles and the increasing concern of environmental and ecological issues have grown. The processing requirement for creative finishing technologies e.g. nanotechnology, to give the request useful properties in various textile sector applications, without unfavorably influencing the earth has become in link manner. This research work was focused on using silver nanoparticles (AgNPs) with particle size ˃100 nm, for treating cotton fabrics and compares such treatment with those previously treated physically with microwave for 2 minutes followed by AgNPs. These finishing techniques were evaluated via the following measurements: fourier transform infrared spectroscopy FTIR–ATR, x-ray diffraction XRD, scanning electron microscope SEM with energy dispersive x-ray analysis EDX, mechanical properties, conductivity, biological and dyeing characteristics. The results clarified the importance of such modification with tiny amount for improvement the properties of cotton samples and renders multi functionality, besides samples previously treated with microwave for 2 minutes clarified superior improvement in properties compared with their corresponding treated with AgNPs only. The main role of nanoparticles treatment is to increase the surface area per unit volume of treated samples without affecting its chemical structure and the energy of microwave is to activate the surface and alter such treatment.
https://ejchem.journals.ekb.eg/article_23894_6df4601f62b00ce6c51aea048a7825d1.pdf
2019-06-01
1003
1016
10.21608/ejchem.2019.6322.1554
silver nanoparticles
Cotton Fabrics
Antibacterial
UPF
FTIR–ATR
XRD
SEM (EDX)
Amal
El-Ebissy
amebissy@yahoo.com
1
National Institute for standards-Egypt
Textile Metrology Laboratory
LEAD_AUTHOR
Monira
Michael
drmoniramichael@yahoo.com
2
National Institute for Standards (NIS), Tersa St., Alharam, Giza, Egypt, P.O Box: 136 Giza, Code No. 12211.
AUTHOR
Yasser
El. Hamaky
yasser@elshehab.org
3
Faculty of applied arts - Helwan Univ. - Egypt
AUTHOR
Hoda
Hussein
hoda_hessiun@yahoo.com
4
Textile metrology laboratory - National Inst. of Standards (NIS) - Eygpt
AUTHOR
ORIGINAL_ARTICLE
Characteristic Properties of Unmodified Polypropylene Fabric Dyed with Pigment Dyes in Aqueous Medium for Medical Uses
An easy and direct method was adopted for dyeing unmodified polypropylene (PP) fabric using pigment dyes blue15 and green 7 in aqueous medium. The dyes are based on copper and are used for dyeing PP at high temperature (100-115 °C). The dyeing parameters include dye concentration, dyeing time and temperature were studied. Color strength (K/S) and colorimetric data (L*, a* and b*) are evaluated at specific λmax. In addition washing and light fastness were determined for PP dyed fabric. Antibacterial activity of pigments blue15 and green 7 dyed PP fabric against S-aureus, E-coli and C-candida were evaluated by optical density method. SEM and EdX were performed for PP dyed fabric with pigment blue 15. PP dyed fabric with pigment dyes is useful for making staff coat uniforms, patients and others products such as mattress covers, bed sheets in clinics and hospitals. This medical dyed PP fabric will prevent propagation of diseases in these medical places and the excess can be exported abroad.
https://ejchem.journals.ekb.eg/article_29457_f9874e0f8cab495e7638f30124af6eb8.pdf
2019-06-01
1017
1024
10.21608/ejchem.2019.9981.1660
Polypropylene fabric
pigment dyes
aqueous medium
Antibacterial activity
Samiha
Gawish
smgawish@yahoo.com
1
Textile Research Division, National Research Cetre
AUTHOR
Hamada
Mashaly
hamada_mashaly@yahoo.com
2
Dyeing, Printing and Auxiliaries Department, Textile Research Division, National Research Centre, Cairo 12622, Egypt
AUTHOR
Sayeda
Mosleh
h.mosleh1959@yahoo.com
3
Textile Division ,,National Research Centre, Dokki, Cairo
AUTHOR
Hany
Helmy
hany_helmy2001@yahoo.com
4
National Research center
LEAD_AUTHOR
ORIGINAL_ARTICLE
Evaluation of Synthesized Ozone by Dielectric Barrier Discharge Plasma for Degradation of Anionic Dyes from Their Solutions
Degradation of hardly degradable textile dyes in wastewater using DBD plasma method becomesa competitive technology for primary decomposition. In the same trend, newcomplex Dielectric Barrier Discharge Plasma device was been used in this study to evaluate its results in degradation of textile dyes. The six dyes used are from different classes (acid, basic and reactive) and structure to cover all the bases of dye. Different parameters asexposure time, ozone and dye concentration and their effect on%efficiency (η) of color removal of dyes from their solution were investigated. The de-colorization kineticsandboth chemical oxygen demand (COD), the effect of final product of the degradation process on the aquatic live is expressed using biological oxygen demand (BOD) analysis. The resultantstudy show that, the maximum color removal was obtained by treating the dyesolution for 90 sec using ozone concentration 20g/m2 and concentration of dye 0.5g/l for all the dyes for all the dye. Kinetic studies were been also considered and the obtained results were following first-order reaction.
https://ejchem.journals.ekb.eg/article_24137_2292ac92521136410b7714f826de075d.pdf
2019-06-01
1025
1036
10.21608/ejchem.2019.6370.1536
plasma
anionic dye
BOD
COD
Kinetic studies
Hend
Ali
hend_plasma@yahoo.com
1
Dye and pigment department Textile Research Division, National Research Centre, Dokki, Cairo, Egypt
AUTHOR
Heba
Hennawi
skybird740@yahoo.com
2
national;l research centre
LEAD_AUTHOR
Kawther
Abdelzaher
kawther_zaher@yahoo.com
3
National Research Centre
AUTHOR
Azza
El-Halwagy
azza@journeywithyou.com
4
national research centre
AUTHOR
Ahmad
Samir
ahmadsamir@yahoo.com
5
University of Al-Azhar
AUTHOR
Abdo
Garamoon
abdogaramoon@yahoo.com
6
University of Al-Azhar
AUTHOR
ORIGINAL_ARTICLE
Development of Smart Alginate/chitosan Grafted Microcapsules for Colon Site-specific Drug Delivery
In this study, a smart delivery system for colon site-specific release of diclofenac sodium (DS) was developed based on alginate grafted chitosan (Alg-g-CS) microcapsules. The developed microcapsules were characterized using FTIR and SEM characterization tools, while the present amine content on the alginate microcapsules surface was estimated by ion exchange capacity (IEC) measurements. Besides, both swelling and in vitro drug release profiles were studied at colon pH medium (pH7.4). The results showed an increase in IEC values from 1.1 to 3.6meq/g with increasing CS concentration from 0.1 to 0.5%. Moreover, grafting of alginate microcapsules with chitosan prevented the drug burst release as well as protected alginate microcapsules from the fast disintegration at colon conditions. The gained results clearly suggested that the developed smart Alg-g-CS (0.5%CS) microcapsules could be used effectively for the delivery of diclofenac sodium (DS) to colon tract.
https://ejchem.journals.ekb.eg/article_24138_e1af50c7d81bd81275ca4f0402592e71.pdf
2019-06-01
1037
1045
10.21608/ejchem.2019.6716.1562
Alginate
Chitosan
Drug delivery
diclofenac sodium
M.
Taher
amo101981@yahoo.com
1
Department of Chemistry, Faculty of Science, AL-Azhar University (Assuit Branch), Egypt
AUTHOR
Ahmed
Omer
ahmedomer_81@yahoo.com
2
Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, City for Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P.O: Box: 21934, Alexandria, Egypt
LEAD_AUTHOR
A.
Hamed
abdo8522@yahoo.com
3
Department of Chemistry, Faculty of Science, AL-Azhar University (Assuit Branch), Egypt
AUTHOR
A.
Ali
aly.aly88@yahoo.com
4
Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, City for Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P.O: Box: 21934, Alexandria, Egypt
AUTHOR
T.
Tamer
ttamer85@gmail.com
5
City of Scientific Research and technological applications (SRTA)
AUTHOR
M.
Mohy Eldin
mohyeldinmohamed@gmail.com
6
Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, City for Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P.O: Box: 21934, Alexandria, Egypt
AUTHOR
ORIGINAL_ARTICLE
Antimicrobial Polypropylene Loaded by Cubic Cuprous Oxide Micro Particles
Recently, nanotechnology of metals and their oxides is increased and became important for production of antimicrobial textiles. In situ synthesis of micro cuprous oxide particles (Cu2O), 1-30 mM/L onto non-woven polypropylene and study the antimicrobial activity were investigated. Cu2O Micro particles were prepared by chemical method using copper sulphate pentahydrate, sodium hydroxide and glucose as a reducing agent at 90o C for 2 hrs, followed by pad-dry-cure at 150ºC for 5min. Cu2O content onto PP was estimated before and after five washings and drying. Characterization of Cu2O Micro particles onto PP was done by XRD, SEM, EDX and which had revealed the presence of Cu2O micro particles in cubic shape at face dimeter 0.6-0.8μm. Characterization of polypropylene color after Cu2O treatment was determined at λmax 410 nm using the colorimetric data (L*, a*, b*, ΔE) and the color strength ( K/S). The antimicrobial activity of treated PP against pathogenic microbes such S. aureus, E. coliand C. albicans was evaluated after 24 hrs contact time and gave very good antimicrobial results. .
https://ejchem.journals.ekb.eg/article_34834_f95d042162aa6d9b3bc53da9a72df864.pdf
2019-06-01
1047
1055
10.21608/ejchem.2019.13001.1813
Polypropylene (PP)
Copper sulphate pentahydrate
Micro-cuprous oxide
Alkaline glucose
antimicrobial activity
Aziza
Hussien
conf@trdegypt.org
1
National Research Centre, Textile Division, Dokki, Cairo, Egypt
AUTHOR
Samiha
Gawish
smgawish@yahoo.com
2
Textile Research Division, National Research Cetre
LEAD_AUTHOR
Sayeda
Mosleh
h.mosleh1959@yahoo.com
3
Textile Division ,,National Research Centre, Dokki, Cairo
AUTHOR
Ameera
Ramadan
ramadanam2000@yahoo.com
4
Textile Division , National Research Centre ,Dokki, Cairo Egypt
AUTHOR
Galal
Sayed
galal.hosny.sayed@gmail.com
5
Ain Shams University - Faculty of Science
AUTHOR
ORIGINAL_ARTICLE
Recycling of Pre-consumer Viscose Waste Fibers for The Removal of Cationic Dye from Aqueous Solution
Recycling of textile waste materials has attracted significant attention for fabrication low-cost dye adsorbent from aqueous solutions. Viscose cellulosic waste fibers are supposed to give an answer to the finding low-cost adsorbent materials. In this research work, viscose waste fibers (VF) were modified by selective oxidation to improve the ability to absorb cationic dyes during wastewater treatment. For this purpose, different treatment parameters were investigated such as sodium periodate concentration, and time of selective oxidation with sodium chlorite. Then, unmodified and oxidized viscose fibers (OVF) were ball milled to produce viscose powder (VP) and oxidized viscose powder (OVP), respectively. The morphology of obtained viscose powders was characterized by scanning electron microscopy. Furthermore, methylene blue adsorption onto viscose cellulose fiber waste (VF) and oxidized viscose fibers (OVF) was studied as a function of contact time (0–80 min), adsorbent dosage (1–9 g/L), MB solution initial pH (3–9) and MB initial concentration (20–80 mg/L). The results showed that MB adsorption onto VF and OVF is a rapid favorable chemisorption process that can be well described by the Langmuir model. The higher adsorption capacity of OVF than VF was related to the increase of the carboxylic group. The oxidized viscose fiber can be used as a potential adsorbent for water treatment.
https://ejchem.journals.ekb.eg/article_35321_985544034cbded70d3f89726cc342488.pdf
2019-06-01
1057
1067
10.21608/ejchem.2019.7968.1625
Viscose fiber
physical recycling
powder
Wastewater treatment
Adsorption kinetics
adsorption isotherms
Hany
Abdel Ghafar
hany_ghafar@yahoo.com
1
Department of Chemistry, Faculty of Sciences and Arts, Khulais, University of Jeddah, Saudi Arabia.
AUTHOR
Mohamed
Salama
salama1974@gmail.com
2
Textile Research Division, National Research Centre, Cairo, Egypt.
LEAD_AUTHOR
Emad K.
Radwan
emadk80@gmail.com
3
Department of Water Pollution Research, National Research Centre, El Bohouth St, Dokki, Giza, Egypt 12622
AUTHOR
Tarek
Salem
dr.tarek74@gmail.com
4
dyeing, printing and auxiliaries department
AUTHOR
ORIGINAL_ARTICLE
The Physical Application of Non-destructive Techniques in Detection the Sequence of Intersecting Gel Ink and Printed Laser Toner Strokes
Determination the sequence of intersecting strokes is great evidence in the field of the authentication of documents. Two types of the intersection utilized in preparing the samples of gel ink and toner. The effect of the brands and models of a laser printer, the brands, and colors of gel pen, the nature of the paper surface and the time gap were studied. The samples were examined by two nondestructive techniques; the digital microscope and Raman spectroscopy. The ink properties observed under the digital microscope succeed in determining the sequence of intersection except in case of some colors of some pen brands. Raman spectroscopy combines with a digital microscope to analyze the samples which indistinguishable by the digital microscope. The combination of a digital microscope and Raman spectroscopy is an excellent forensic base to full discrimination the sequence of intersecting strokes regardless of the brands or colors of gel ink.
https://ejchem.journals.ekb.eg/article_23895_f44d9c4f3ae64ca9bbcefe7146598704.pdf
2019-06-01
1069
1091
10.21608/ejchem.2019.6532.1549
Strokes intersection
Toner laser printer
Gel pen
Cross lines
Raman spectroscopy
Non-destructive techniques
Samia
Shraa
samiashara2012@yahoo.com
1
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
AUTHOR
Abdel Aleem
Abo Elmagd
dr.aleem@yahoo.com
2
Al-Azhar University, Chemistry Department, Nasr City, Cairo, Egypt
AUTHOR
Al-Sayed
Bakr
als_water@yahoo.com
3
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
AUTHOR
Yasser
Moustafa
ymoustafa12@yahoo.com
4
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
AUTHOR
A.A
Shabana
5
Al-Azhar University, Chemistry Department, Nasr City, Cairo, Egypt
AUTHOR
Ibrahim
Abd El-Aziz
ibrahimexpert_78@yahoo.com
6
Forgery & Counterfeiting Department, Forensic Medicine Authority, Ministry of justice, Cairo, Egypt
LEAD_AUTHOR
ORIGINAL_ARTICLE
Design, Synthesis, and Biological Evaluation of N-Phenylpyrazole Derivatives Featuring Nitrogen-Containing Side Chains as Potent Antitumor Agents
A series of novel N-phenylpyrazole containing acyl derivatives 3a, b, N-methylimidiazole 4, thiazole derivatives 6a-d, benzimidiazole derivatives 7a-c pyrane and pyridine 8, 9a, b, tetrazole 10, pyridodipyrimidine 11, and dihydronaphthaline derivatives 15 have been synthesized. The structure of the newly synthesized compounds was elucidated by IR, 1H NMR, 13C NMR, Mass spectra and Elemental analysis. The newly synthesized compounds were evaluated for their antitumor activity against three tumor cell lines, liver cancer (HepG2), human colonic carcinoma cell line (HCT-116), and human breast adenocarcinoma (MCF-7). Compounds 6d, 7b, c, 9b and 11 exhibited higher antitumor activity compared with the reference drug Doxorubicin.
https://ejchem.journals.ekb.eg/article_26373_ffe54279554db509fc160531b02eeb66.pdf
2019-06-01
1093
1104
10.21608/ejchem.2019.6773.1565
N-pyrazolyl derivatives
hexahydropyridodipyrimidine-4
6-dione
antitumor activity
Hend
Hafez
dr.hendhafez@yahoo.com
1
Photochemistry department, National Research center, Chemical Industrial Section, DokKi, Gizza
LEAD_AUTHOR
Abdel-Rhman
El-Gazzar
profelgazzar@yahoo.com
2
Al-Imam Mohammad Ibn Saud Islamic University (IMSIU), Faculty of Science, Department of Chemistry
AUTHOR
Ahmed
Ali
a_saly@yahoo.com
3
Photochemistry Department, National Research Centre, Cairo, Egypt
AUTHOR
Abbas Alakhras
Alakhras
aakhrasi@imamu.edu.sa
4
Al-Imam Mohammad Ibn Saud Islamic University (IMSIU), Faculty of Science, Department of Chemistry, Riyadh
AUTHOR
ORIGINAL_ARTICLE
Nano Titania Combined with Micro Silica Reinforced Limestone Cement: Physico-mechanical Investigation
The influence of different ratios of fillers addition such as limestone and micro white sand, as well as nano-titania particles on the physico-mechanical properties of ordinary white Portland limestone cement (OWPC), has been studied. One mix (10.00 wt. %) of equal ratios from limestone and white sand in micro scale, partially replaced by cement clinker. Mechanical strength, phase composition, and microstructure of blended cement have been investigated. The results showed that filler reduces the setting time and total porosity, improve the strength, free lime content, combined water content and bulk density of cement pastes due to the pozzolanic effect of micro white sand that replaces clinker and enhance an excess amount of hydration products. It can be concluded that limestone fills the pores between cement particles due to the formation of carboaluminate, while micro sand increases the hydration C-S-H product. TiO2 nanoparticles (i.e., less than 100 nm) shows a great efficiency in enhancing the mechanical strength of cement paste due to the incorporation efficiency of nanoparticles as active sites for gel Tobermorite C-S-H fibers growth during hydration,
https://ejchem.journals.ekb.eg/article_26939_a2940a84bbec48dc754e5d58525f3237.pdf
2019-06-01
1105
1115
10.21608/ejchem.2019.6810.1571
Ordinary White Portland Cement (OWPC)
White micro Sand
Pozzolania
cement hydration
Titania-Nanoparticles and morphology
Basma A.A
Balboul
1
Chemistry Department, College of Science, Aljouf University, P.O. Box 2014, Sakaka, Aljouf, Kingdom of Saudi Arabia
AUTHOR
Mohamed
Abdelzaher
m.abuelseoud@psas.bsu.edu.eg
2
Environmental Science and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt
LEAD_AUTHOR
Asmaa S.
Hamouda
3
Environmental Science and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt
AUTHOR
A.H.
Zaki
4
Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt
AUTHOR
ORIGINAL_ARTICLE
Assessment of Surface Water Quality, Raw versus Treated, for different uses at Dakahlia Governorate, Egypt
Water is one of the most important sources of economic development. In order to maintain living conditions, attention must be paid to water quality management, water pollution control and environmental protection. The pollution of the Nile river has increased recently due to population growth, economic development and related human activities. Egypt is among the 10 countries that will suffer from water scarcity by 2025 due to rapid population growth. This study aimed the assessment of water quality according to drinking, agriculture and aquatic life purposes in El-Sinbellawein city and some of belonging villages, at Dakahlia governorate, Egypt. The water quality indices are an attempt to represent overall quality of water. Assessment of water quality for treatment plants under study according to drinking and aquatic life purposes was carried out using weighted arithmetic method of water quality index (WQI). Physico-chemical parameters of different water treatment plants at different locations were analyzed before and after water treatment and the obtained values were used for calculation of Water Quality Index (WQI). The values of WQI showed that the water is unsuitable in some treatment plants and excellent in another for drinking and aquatic life. Sodium adsorption ratio (SAR), percent sodium (Na %), residual sodium carbonate (RSC), Kelly Index (KI) and magnesium ratio (MR) were also calculated by using major anions and cations values to assess suitability of water for irrigation. The results indicated that all treatment plants under studying were classified from suitable to excellent for irrigation purposes. The study was extended also to include assess of water pollution by metals (Cd2+, Cu2+, Fe2+, Mn2+, Ni2+, Pb2+, and Zn2+) via calculation of Metal index (MI) and pollution index (PI). The results indicate that there is no effect of metals in the case of water use for agricultural purposes, whereas for drinking and aquatic life, all measured metals except Zn2 + and Ni2 + show different degrees of contamination. The wastes should be treated before disposing and dumped to suitable sites, to protect the water quality from deterioration and maintain its quality.
https://ejchem.journals.ekb.eg/article_24989_549f750beeb99f28fe1088111a5b4a4d.pdf
2019-06-01
1117
1129
10.21608/ejchem.2019.6975.1582
water quality
Treatment
pollution
Heavy metals
indexes
Adel
Elhdad
adelelhdad48@gmail.com
1
Basic science department, Madina Higher Inistitute of Engineering and Technology Giza, Egypt.
LEAD_AUTHOR
ORIGINAL_ARTICLE
Sol-gel, Hydrothermal, and Combustion Synthetic Methods of Zinc Oxide Nanoparticles and Their Modification with Polyaniline for Antimicrobial Nanocomposites Application
Zinc oxide nanoparticles (ZnO NPs) have attracted much medical attention as antibacterial agents through their ability to produce reactive oxygen species (ROS) under ultraviolet light. Conducting polymers can enhance the photocatalytic efficiency of ZnO NPs by expanding their absorption in the visible region. In this article, ZnO NPs were prepared and characterized using three different chemical routes; sol-gel, hydrothermal, and combustion methods. The effect of calcination temperature on their properties had been investigated. ZnO NPs prepared from the combustion method at 750 oC was modified with (10%, 15%, and 20%) polyaniline (PANI) by in situ polymerization of aniline on the dispersion of ZnO NPs to produce PANI/ZnO nanocomposites (NCs) NC10, NC15, and NC20, respectively. Characterization of the synthesized NCs was carried out by FTIR, XRD, TEM, and SEM. Their antibacterial efficiency toward Escherichia coli G- and Staphylococcus aureus G+ and antifungal activity to Aspergillus flavus and Candida albicans were evaluated. The NCs revealed medium antibacterial activity where NC15 showed the highest activity to Staphylococcus aureus (G+) and Candida albicans, however, no efficiency was detected against Aspergillus flavus (Fungus).
https://ejchem.journals.ekb.eg/article_27050_683e8d3992ca540b708bc6081eb7c66c.pdf
2019-06-01
1131
1144
10.21608/ejchem.2019.6952.1578
Polyaniline
Nanocomposite
sol-gel
hydrothermal
Combustion
antimicrobial activity
S.M.M.
Morsi
samirmchemist@gmail.com
1
National Research Centre, Polymer and Pigments Department, 33 El Bohoth St. (Former El Tahrir St.), Dokki, P.O. 12622, Giza, Egypt.
AUTHOR
Ragia
Mohsen
rajiamohsen@yahoo.com
2
National Research Centre, Polymer and Pigments Department, 33 El Bohoth St. (Former El Tahrir St.), Dokki, P.O. 12622, Giza, Egypt.
LEAD_AUTHOR
Mohamed
Selim
mmaselim@yahoo.com
3
National Research Centre, Physical Chemistry Department, 33 El Bohoth St. (Former El Tahrir St.), Dokki, P.O. 12622, Giza, Egypt.
AUTHOR
Hazem
Elsherif
elsherifhazem@yahoo.com
4
National Research Centre, Polymer and Pigments Department, 33 El Bohoth St. (Former El Tahrir St.), Dokki, P.O. 12622, Giza, Egypt.
AUTHOR
ORIGINAL_ARTICLE
Durability of Supersulphated Cement Pastes Activated with Portland Cement in Magnesium Chloride Solution
This study investigates the effect of chemical attack of chlorides on the physicomechanical properties of the prepared supersulphated cement (SSC) pastes activated by 2-11 % ordinary Portland cement (OPC) after immersion in 4% magnesium chloride solution for up to 12 months. Results indicated that the bulk density increases while the apparent porosity decreases with hydration time for all the SSC pastes. The compressive strength results showed a significant increase for all SSC samples hydrated up to 12 months whereas they showed high resistance to deterioration. The hydration products appeared via XRD, FTIR, TG, DTG, and DSC are ettringite, gypsum, anhydrite, and calcium silicate hydrate (CSH).
https://ejchem.journals.ekb.eg/article_24437_8a31f8bc619cf6ac4b71c04bbdb6fd1f.pdf
2019-06-01
1145
1155
10.21608/ejchem.2019.6563.1579
Supersulphated cement
Slag
Anhydrite
Physicomechanical properties
Magnesium chloride
Aggressive Media
A.
Hegazy
dr.ahegazy@yahoo.com
1
Refractories, Ceramics and Building Materials Department, National Research Centre, Cairo, Egypt
LEAD_AUTHOR
A.
Khalil
aakhalil10000@yahoo.com
2
Refractories, Ceramics and Building Materials Department, National Research Centre, Cairo, Egypt
AUTHOR
E.
El-Alfi
solimanelsayed614@yahoo.co.uk
3
Refractories, Ceramics and Building Materials Department, National Research Centre, Cairo, Egypt
AUTHOR
M.
El-Shahat
elshahatmf1@yahoo.com
4
Chemistry Dept., Faculty of Science, Ain Shams University, Cairo, Egypt
AUTHOR
ORIGINAL_ARTICLE
Removal of emerging contaminants from municipal wastewater using a compartmentalized anaerobic baffled reactor: Effect of organic loading rate
This study deals with the occurrence and removal efficiency of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) as selected persistent organic pollutants (POPs) in municipal wastewater via a compartmentalized anaerobic baffled reactor (ABR). The treatment processes and removal efficiencies using ABR were assessed with application of three hydraulic retention times (8, 16 and 24 hrs). The detected concentration values for PAHs in raw wastewater were varied from 345 to 1960.1 with an average value of 1003.5 μg/l. While those for PCBs were 2.3 to 18.7 with an average value of 8.7 μg/l. The removal efficiencies for PAHs achieved 52, 81 and 86%, whereas for PCBs they recorded 41, 67 and 77% at HRT of 8, 16 and 24 hrs, respectively. POPs contributor to surface water bodies in Egypt and better reduction efficiencies are achievable, the present study highlights the possibility of utilizing ABR for restoring water quality for reuse or safely discharging on the streams.
https://ejchem.journals.ekb.eg/article_28649_5b84c90fb4dde2f6c57463e8b90d9ac0.pdf
2019-06-01
1157
1165
10.21608/ejchem.2019.7784.1616
Compartmentalized Anaerobic Baffled Reactor
Treatment
Wastewater
PAHs
PCBs
OLR
Hossam
Nassar
hossamnassarnrc@gmail.com
1
Department of Environmental Sciences and Industrial Development, Faculty of Post Graduate Studies for Advanced Sciences, Beni-Suef university
LEAD_AUTHOR