Ahmad A. Abu-Obaid

Ahmad A. Abu-Obaid
An-Najah National University · Department of Chemistry

Ph.D (Physical - Analytical Chemistry)

About

31
Publications
9,234
Reads
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147
Citations
Additional affiliations
May 1980 - present
An-Najah National University
Position
  • Lecturer

Publications

Publications (31)
Article
Full-text available
Corrosion inhibition of aluminium in carbonate sodium solution was investigated by weight loss and electrochemical techniques using eugenol oil as inhibitor. The inhibition efficiency increase when the eugenol concentration enhance. The obtained data revel that the tested oil acts as an excellent inhibitor for the corrosion of aluminium in Na2CO3 s...
Article
Full-text available
Water pollution is a major environmental problem especially that produced from different industries, which produce large amounts of toxic heavy metals to the soil and wastewater; these heavy metals affect human health. This study was made to study the removal of one of these toxic heavy metals which is Cr(VI) by adsorption technique using silica ge...
Article
Full-text available
Novel 5,5-dimethyl-2,2-di(pyridin-2-yl)hexahydropyrimidine was synthesized in good yield by a one-pot condensation reaction of 2,2-dimethylpropane-1,3-diamine with di(pyridin-2-yl)methanoneusing dichloromethane as solvent at room temperature. The structure of the synthesized compound was assigned on the basis of its elemental analysis, UV-visible,...
Article
Full-text available
Abstract In this study we examined the adsorption, kinetics and thermodynamics of heavy metals of used engine oil that come during engine operation and forsaw the possibility of polluting soil and ground water. the effect of temperature on adsorption was investigated in the range (15 – 45o C) and results showed that maximum removal occurred at 45C...
Article
Full-text available
Abstract Through smoking, important flux of heavy metals and many other toxins reaches smokers ' lungs. This project reports the heavy metal concentrations in tobacco from samples of 25 cigarette products, sold in Palestine. Cadmium (Cd), lead (Pb), cobalt (Co), nickel (Ni), copper (Cu) and zinc (Zn) contents were determined in 25 brands of tobacco...
Article
Full-text available
Abstract In this study we examined the adsorption, kinetics and thermodynamics of heavy metals of used engine oil that come during engine operation and for saw the possibility of polluting soil and ground water. the effect of temperature on adsorption was investigated in the range (15 – 45oC) and results showed that maximum removal occurred at 45o...
Article
Full-text available
Abstract In the present work cellulose powder was extracted from olive industry solid waste and then converted into cellulose acetate. The cellulose powder was extracted from olive industry solid waste by kraft pulping process and multistep bleaching p sequences. An elemental chlorine-free chemical bleaching sequence chlorine dioxide (D)-cold caust...
Conference Paper
Full-text available
Abstract This study focuses on a new approach for removal of phenol from an aqueous solution. In this approach cross-linked polyitaconic acid (x-PIA) was used as phenol adsorpent. Cross-linked polyitaconic acid was prepared from itaonic acid and the cross-linking agent 1,4-butane diglcidyl ether using chain growth polymerization technique The adsor...
Article
Three diamine-bis(diphenylphosphinobutane)ruthenium(II) complexes, isolated from the reaction of [Cl2Ru(dppb)] with diamines, have been synthesized and characterized on the basis of various physico-chemical studies viz., elemental analyses, IR, UV/Vis, FAB-MS, TG-DTA, EXAFS, EDX and 1H-, 13C- and 31P{1H}NMR spectroscopy. 31P{1H}NMR investigations c...
Article
Full-text available
Abstract: In this contribution, two novel supported and non-supported ruthenium(II) complexes of type [RuCl2(dppme)(NN)] where [dppme is H2C=C(CH2PPh2)2 and NN is N1-(3-(trimethoxysilyl)propyl)ethane-1,2-diamine] were prepared. The NN co-ligand caused release of one of the dppme ligands from [RuCl2(dppme)2] precursor to yield complex 1. The process...
Article
Full-text available
In this contribution, two novel supported and non-supported ruthenium(II) complexes of type [RuCl2(dppme)(NN)] where [dppme is H2C=C(CH2PPh2)2 and NN is N1-(3-(trimethoxysilyl)propyl)ethane-1,2-diamine] were prepared. The NN co-ligand caused release of one of the dppme ligands from [RuCl2(dppme)2] precursor to yield complex 1. The process of substi...
Article
Full-text available
Phenolic organic compounds are extremely highly generated from many resources which disposed to sewerage system without treatments that increase the risk of contaminating water resources. This study is focused on preparing and studying the properties of activated carbon produced from cypress fruit by chemically activation using phosphoric acid (H 3...
Article
Full-text available
Abstract Imidaclopid and abamectin are the most pesticides used in Palestine for agricultural purpose. Those pesticides released some amount to the soil and this will affect both soil and groundwater. Results indicate that the highest percentage of imidacloprid and abamectin removal was 13.4 % and 7.5 % respectively when adsorbent dosage was 3.0 g....
Article
Full-text available
Phenolic organic compounds are extremely highly generated from many resources which disposed to sewerage system without treatments that increase the risk of contaminating water resources. This study is focused on preparing and studying the properties of activated carbon produced from cypress fruit by chemically activation using phosphoric acid (H3P...
Article
Full-text available
Metal ions are required for many critical functions in humans. Scarcity of some metal ions can lead to disease. Well-known examples include pernicious anemia resulting from iron deficiency, growth retardation arising from insufficient di- etary zinc, and heart disease in infants owing to copper deficiency. The ability to recognize, to understand at...
Article
Full-text available
Heavy metals are persistent pollutants in the environment. Problems associated with the cleanup of sites contaminated by metals have demonstrated the need to develop remediation technologies that are feasible, quick, and effective in a wide range of physical settings. In this study we have investigated the adsorption of Cu(II), onto red soil in sin...
Conference Paper
Plain weave fabrics comprised of high-strength continuous-filament yarns such as Kevlar are used in many applications requiring impact and penetration resistance against high energy projectiles. Computationally simulating the impact of these fabrics using a finite element (FE) analysis is an extremely useful tool to investigate architectural and ma...
Article
A method for catalytic determination of copper (II) is presented. The method is based on the catalytic effect of copper(II) on the rate of oxidation of indigo carmine by potassium bromate. The method is satisfactory for the determination of copper(II) in the range 1.2 to 38 ng/mL. Effect of acidity, indigo carmine, potassium bromate, temperature an...
Article
A method for simultaneous spectrophotometric determination of total iron, iron(II) and iron(III) in mixtures containing other metal ions has been described. The method is based on the complexation of iron with di-2-pyridyl ketone benzoylhydrazone (DPKBH) in 50% (v/v) ethanolic solution. Iron(II) complex with DPKBH exhibits two absorption maxima at...
Article
The kinetics and mechanism of hydrolysis of a series of substituted benzylidene benzoylhydrazones (X-BBH) have been studied at five different temperatures in the range 25-45 C by UV-Visible spectrophotometry. The hydrolysis reactions were found to follow 1st order kinetics. A mechanism has been postulated in which attack of water on the protonated...
Article
A theoretical study has been made of the properties of a liquid bridge between spheres of equal and unequal radii taking into account the effect of gravity on the meniscus shape and capillary attractions. The interfacial shape of the bridge is obtained by a numerical solution of the Young-Laplace equation employing the Runge-Kutta method for a give...

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