Ahmad A. Abu-Obaid

An-Najah National University · Department of Chemistry

Green technology " phytoremediation " approach was applied in WadiA lsamin in Hebron-Palestine to evaluate the plant efficiency in remediation of soil that is polluted with chromium (Cr). An open field controlled experiment was conducted to assess the efficiency of two plant species, namely corn (Zea mays) and tobacco (Nicotiana tabacum), in remedi...

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...

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...

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,...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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....

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...

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...

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...

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...

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...

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...

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...

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...