Ehab Alshamaileh

University of Jordan | UJ · Department of Chemistry

The self-assembly of cyclohexylamine dithiocarbamate (C6DTC) on gold (Au) and gold nanoparticles (AuNPs) was studied electrochemically using cyclic voltammetry (CV). Cyclic voltammetry was used to study the system at the electrode surface of (C6DTC/Au) and (C6DTC/AuNPs). The application of the resulting chemically modified surface as a selective se...

The surface structures formed by deposition of 0.25 ML and 0.50 ML Bi on Cu{100} at room temperature have been determined quantitatively using the symmetrised automated tensor low energy electron diffraction (SATLEED). At θBi=0.25 ML, Bi forms a semi-ordered p(2×2) surface alloy with the Bi atoms located at a height of 0.56±0.06 Å with respect to c...

The kinetics and mechanism of an irreversible overlayer to underlayer transition in the Cu(1 0 0)-c(2×2) surface alloy has been investigated by LEED. The activation energy for Pd site switching from the outermost layer to sub-surface (second layer) sites has been estimated to be 109±12 kJ mol−1 (1.13±0.12 eV).The structure of the underlayer alloy h...

The geometric structure and compositional profile of a Cu{1 0 0}-c(2×2)-Pt surface alloy formed by thermal activation of a monolayer Pt film has been determined by tensor low energy electron diffraction (LEED). A wide range of models have been tested. The favoured model consists of an ordered c(2×2) CuPt underlayer below a Cu terminated surface. Mo...

Many techniques are used for the treatment of wastewater, including physical, chemical, biological, physiochemical, and biophysical methods. Advanced oxidation processes (AOPs), a chemical approach, are a key procedure for wastewater treatment. AOPs are applied to nonbiodegradable effluents, using less energy and chemicals while producing a complet...

Lead sulfide (PbS) on the nanoscale was synthesized via a chemical route at room temperature using lead nitrate {Pb(NO3)2} and sodium sulfide (Na2S). The Na2S was prepared at ~105 °C using sodium hydroxide (NaOH) and sulfur (S) powder. The produced PbS, denoted as Lab-PbS, was compared with a high-concentration PbS phase of galena. The produced Na2...

Soft-sediment deformation structures (SSDSs) typically form in unconsolidated sedimentary deposits before lithification. Understanding these structures involves evaluating their characteristics, genesis timing, and the dynamics of sediment deformation. SSDSs are essential for deciphering ancient environments, reconstructing depositional processes,...

Galena is a natural mineral enriched with lead sulfide (PbS). It typically forms in hydrothermal veins associated with igneous rocks and can also occur as a gangue mineral in other ore deposits. PbS is of special importance for scientific research applications due to the possibility of tuning its semiconductor energy gap using nanotechnology in con...

Cancer, an incurable global disease, demands urgent anti-cancer drug development. Marine alkaloids like Manzamine and its derivatives show promise as RSK inhibitors against cancer cell invasion. Replacing the hydrogen at the 8-position of Manzamine A with a hydroxyl group has been shown to significantly enhance its biological activity. In this arti...

Citation: AlShamaileh, E.; Altwaiq, A.M.; Al-Mobydeen, A.; Hamadneh, I.; Al-Saqarat, B.S.; Hamaideh, A.; Moosa, I.S. The Corrosion Inhibition of Montmorillonite Nanoclay for Steel in Acidic Solution. Materials 2023, 16, 6291. https://doi. Abstract: The aim of this research is to study the anticorrosive behavior of a coating consisting of modified m...

Novel materials from Feldspar as clay material and KH2 PO4 (KHP) are prepared by grinding in a planetary ball mill in a mechanochemical process, one of the most effective ways to synthesize slow-release fertilizers. In two paths, tests were carried out with (3) weight ratio of Feldspar: KH2PO4 contents, at mill the incorporation of KH2PO4 and the l...

In this work, one of the novel types of slow-release fertilizers (SRF) consisting of kaolin as clay material andK2SO4 was synthesized through a mechanochemical process by grinding in a ball mill planetary model. The test samplesof different weight % from 25 to 75 of kaolin contents were milled for 2 h at fixed milling speeds about 600 rpm to assess...

Aluminum oxide production from aluminum filings, which are a byproduct of several industrial machining processes and cannot be recycled to attain bulk aluminum (Al), is vital due to its wide use in scientific research and industry. The goal of this paper is to produce ultrafine and down-to-the-nanoscale alumina powder (Al2O3), starting from a waste...

In this research, some physical properties such as the density, specific heat capacity, and micro-hardness of galena ore lumps purchased from the public market were determined. The microscopic study, using the scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS), confirmed that the as-received galena ore was mostly lead...

Background: In this work, one of the novel types of slow-release fertilizers (SRF) consisting of kaolin as clay material and K2SO4 was synthesized through a mechanochemical process by grinding in a ball mill planetary model. Methodology: The test samples of different weight % from 25 to 75 of kaolin contents were milled for 2 h at fixed milling spe...

In this study, a novel slow-release fertilizer (SRF) consisting of kaolinite and K2SO4 was prepared, employing the process of mechanochemical milling in a planetary ball mill. To obtain the optimum milling time and speed, several samples were made at fixed mass ratios of kaolinite: K2SO4 (3:1). The milling rotational speed ranged from 200 to 700 rp...

The Sun is a huge and clean energy source that must be relied upon to reduce greenhouse gases and promote the renewable and sustainable energy transition. In this paper, the testing of Al, Cu, and Fe metals with different thicknesses, both bare and painted matte black, was investigated for solar water heating systems. The used technique was a direc...

Background: In this work, one of the novel types of slow-release fertilizers (SRF)consisting of kaolin as clay material and K2SO4 was synthesized through amechanochemical process by grinding in a ball mill planetary model.Methodology: The test samples of different weight % from 25 to 75 of kaolin contentswere milled for 2 h at fixed milling speeds...

Novel materials from Feldspar as clay material and KH2PO4 (KHP) are prepared by grinding in a planetary ball mill in a mechanochemical process, one of the most effective ways to synthesize slow-release fertilizers. In two paths, tests were carried out with (3) weight ratio of Feldspar: KH2PO4 contents, at mill The incorporation of KH2PO4 and the li...

As a greener method of preparing molecules, mechanochemistry has recently been identified as an ideal strategy for preparing diverse molecules. It is becoming a valuable synthetic tool for multiple fields (e.g., physics, chemistry, and materials science) because it can be performed without solvents or with minimal solvents (catalytic quantities). T...

Humans are increasingly required to harvest green solar energy in order to reduce energy bills and save the environment from the excessive use of fossil resources. In this article, the microstructures of both commercial non‑colored anodized Al and commercial blackened anodized Al were studied using optical and scanning electron microscopy in order...

The removal of the widely used drug (paracetamol) from water using Jordanian olivine was investigated. The olivine was characterized using the Scanning electron microscopy energy dispersive spectroscopy (SEM-EDX) and the Fourier transform infrared (FT-IR) analyses. The effect of the temperature, contact time and ultrasonic waves at an ultrasonic fr...

The influence of surfactant synergism between sodium dodecyl benzene sulfonate (SDBS) and N,N-dimethyldodecan-1-amine Oxide (DDAO) on zinc corrosion in 0.05 M hydrochloric acid (HCl) solutions at 25 °C was investigated. Firstly, solutions of SDBS and DDAO with mole fractions of 0.00, 0.25, 0.50, 0.75 and 1.00 were prepared and their surface tension...

As a greener method of preparing molecules, mechanochemistry has recently been identified as an ideal strategyfor preparing diverse molecules. It is becoming a valuable synthetic tool for multiple fields (e.g., physics, chemistry,and materials science) because it can be performed without solvents or with minimal solvents (catalytic quantities).The...

Solvent-free ball milling was used to activate kaolin, a trioctahedral clay material, with diammonium phosphate[(NH4)2HPO4] to serve as a fast-acting phosphorus and nitrogen releasing fertilizer. Different tests on a mixture of 3:1 weight ratio of kaolin: (NH4)2HPO4 were performed to analyze the level of incorporation of (NH4)2HPO4 in the kaolin an...

Mild steel is one of the most widely used construction materials that finds various applications in industry owing to its exceptional mechanical properties and low cost. However, hydrochloric acid is widely used as an efficient pickling agent in steel industries to remove rust and scales, but it accelerates steels corrosion rate. Corrosion inhibito...

Mild steel is one of the most widely used construction materials that finds various applications in industry owing to its exceptional mechanical properties and low cost. However, hydrochloric acid is widely used as an efficient pickling agent in steel industries to remove rust and scales, but it accelerates steels corrosion rate. Corrosion inhibito...

Mechanochemistry is a branch of solid-state chemistry which describes processes that proceed in the solid form upon the application of mechanical energy. At present, mechanochemistry appears to be a science with a sound theoretical foundation which exhibits a wide range of potential applications. Amongst the potential viable processes we can mentio...

Slow- and controlled-release fertilizers (S/CRFs) are considered as novel and revolutionary approaches in the field of fertilizer synthesis. S/CRFs are seen as economical and environment-friendly alternative to chemical fertilizers. However, there is no consolidated, perfect, and institutionalized classification basis. This chapter highlights the v...

Mechanochemical processing was applied to produce slow-release fertilizers consisting of kaolinite as clay material and (KDP) KH 2 PO 4 in 3:1 weight ratio by grinding the contents in a planetary ball mill at milling rotational speeds ranging from 200 to 700 rpm for 2 h and at different milling times ranging between 1-3 h at 600 rpm milling speed....

The formation of metal oxide-based hydroxysodalite by alkali-activation of kaolinite is studied using X-ray diffraction (XRD) study and differential scanning calorimetry (DSC) analysis. Different metal oxides (CoO, MgO, FeO and SiO2) were used to form the metal oxide-based hydroxysodalite. The transformation from kaolinite into hydroxysodalite is c...

جائزة خليل السالم للبحث العلمي

This study investigated a mechanochemical (MC) process for synthesizing a slow-release urea fertilizer by co-grinding the starting materials of (NH2)2CO and amorphous kaolinite in a planetary ball mill. The tests with kaolinite contents ranging from 25 to 75 wt. %, milling time ranging from 1 (h) to 3 (h) and mill rotational speeds from 200 to 700...

There are different methods to mitigate or prevent scale formation in pipes, rather by chemical addition e.g. anti-scaling substances, or physically which includes ultrasonic or nanofiltration (NF). Nanofiltration membranes have a selectivity for the multivalent charged ions, so monovalent ions will pass the membrane partly and multivalent ions wil...

In the present study, Fourier Transform Infrared (FTIR) spectroscopic characterization of a novel mixture of kaolinite-NPK is described. Kaolinite is an environmentally friendly substance that exhibits good structural properties when used as a carrier of chemical fertilizers. Mixtures of kaolinite and NPK fertilizer were prepared by mechanochemi...

This study investigated a mechanochemical process for synthesizing slow-release fertilizers of kaolinite and KH2PO4/(NH4)2HPO4 in separate systems by milling in a planetary ball mill. Tests with kaolinite contents ranging from 25 to 75 wt.% and mill rotational speeds at 600 rpm for 2 h were performed to evaluate incorporation of KH2PO4 and (NH4)2HP...

Adsorption is a widely used technique for the removal of pharmaceutical organic micro-pollutants. In this article, calcined gypsum (CaSO4.1/2H2O) was utilized for the removal of ibuprofen medicine from polluted water. Several factors including the adsorbent dose, contact time, and temperature were studied. The influence of the ions in the solution...

In order to monitor the change in the Disi water chemistry that is pumped from the Disi aquifer to Amman city along the 345 km pipeline, the changes in chemistry and surface precipitation of scale were investigated using simulated plumbing system. The influence of flow rate variation was investigated since Disi water usually pumped using different...

Aims/Objective This review discusses the processes and applications associated with the mechanochemical synthesis of Slow-Release Fertilizers (SRF) from different resources. Explanation The effect of mineral fertilizers on the environment and on living species will be discussed. Moreover, various aspects related to fertilizers production and appli...

A computational study of the ozonolysis of phenanthrene has been carried out using DFT methods (B3LYP and M06-2X). The reaction mechanism for the ozonolysis was studied in both gas phase and in solution, using the polarizable continuum solvation model. The structures for all proposed reaction mechanisms were optimized using M06-2X and B3LYP methods...

This book concerns generally with drinking water quality and focused particularly on Disi aquifer water which considered as one of the important water resources in The Kingdom of Jordan. Problems that faced pumping water through plumbing systems were discussed in details particularly the deposition of mineral salts such as calcium carbonate during...

In order to assess water quality in Amman city, the capital of Jordan, 32 samples covering the Disi basin, three major water reservoirs, and Amman’s municipal water from different locations in the city were collected and subjected to physico-chemical measurements. Standard methods of analysis have been used to determine total alkalinity (TA), total...

Purpose – The current status of nanotechnology research and development in Jordan is analyzed. In recent years, Jordanian institutions demonstrated considerable interest in the development and production of nanotechnology. Here the purpose of this paper is to provide detailed information about the status of nanotechnology in Jordan in terms of seve...

Undergraduate Student Poster Session.

The mechanism that accounts for the observed experimental activation energy for the decomposition of ethylamine (EA) is still unknown. This paper reports the first detailed study of possible mechanisms for the pyrolysis of second-stage cracking product of ethylamine: the decomposition reaction of methanimine, ethanimine, and aminoethylene. Investig...

In this work, the inhibitory effect of a commercial anti-scalant (Veolia Hydrex s 9209) on the calcium minerals of carbonate, sulfate and hydrocalumite (Ca/Al) clay deposition from seawater has been investigated. Different concentration factors and anti-scalant doses were studied by analyzing the water hardness and turbidity. The inhibitory effect...

The corrosion inhibition property of sodium lignosulfonate is investigated by three different independent monitoring techniques. These methods include weight loss measurements, electrical conductance and potentiodynamic polarization. Solutions with and without sodium lignosulfonate in 0.01 M HCl and 0.1 M HCl were prepared at 20 oC to study the inf...

The structures formed by adsorbing thin-film platinum, formic acid and oxygen on Cu{100} single crystal are investigated by quantitative low-energy electron-diffraction (LEED) and Temperature Programmed Reaction Spectroscopy (TPRS). Symmetrized Automated Tensor LEED (SATLEED) calculations are used to determine the structure of the formed surface al...

The role of cyclohexylamine dithiocarbamate (CHDTC) in the corrosion inhibition of aluminium in 1 M HCl solution is investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy techniques. The results suggest that CHDTC is a good inhibitor with mixed-type character for aluminium...

The role of cyclohexylamine dithiocarbamate (CHDTC) in the corrosion inhibition of aluminium in 1 M HCl solution is investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy techniques. The results suggest that CHDTC is a good inhibitor with mixed-type character for aluminium...

In this work, the improvement of the setting time (S.T.) of the Plaster of Paris produced from gypsum deposits of Jabal Mulaih, in Tafila, south Jordan, was investigated. The setting time of the reference sample was about 10 min and the final setting time reaches 20 min. Two approaches were investigated. The first one provided the application of so...

The structure, electronic properties, and chemical reactivity of pyrene and its three monochlorinated derivatives have been theoretically studied by using density functional theory (DFT). Several methods and basis sets are tested for the optimization of the geometrical structure and the B3LYP/6-311G** method/basis set is found to be the most suitab...

The UV/Visible spectra of m-methyl red (m-MR) ({3-[4-(dimethyl-amino) phenylazo] benzoic acid}) were examined in basic, acidic and strongly acidic aqueous solutions. The observed spectra of m-MR were analyzed and compared with the tautomeric and resonance structures that suggested theoretically. Three isosbestic points in the spectra were observed...

The release of chlorine in the electrodeionization (EDI) unit causes corrosion in the EDI unit, damaging ion exchange membranes and creating a safety risk for the workers. In this work, adsorption desalination of Cl− ions on low-cost composite synthetic–natural Jordanian materials were investigated as an approach to prevent the release of corrosive...

The UV/Vis spectra of the m-methyl red (m-MR) ({3-[4-(dimethyl-amino) phenylazo] benzoic acid}) were examined in aqueous solutions at various acidities. These were characterized by the overlap of the different bands of m-MR. The thermodynamic acid dissociation constant, K a2, of the equilibrium between m-H2MR + (diprotic form) and m-HMR (monoprotic...

The release of chlorine in the electrodeionization (EDI) unit causes corrosion in the EDI unit, damaging ion exchange membranes and creating a safety risk for the workers. In this work, adsorption desalination of Cl ions on low-cost composite synthetic–natural Jordanian materials were investigated as an approach to prevent the release of corrosive...

Tetrapyridinecopper(I) iodide, [Cu(C 5 H 5 N) 4 ].I, has been synthesized and characterized by single-crystal X-ray diffraction at room temperature: tetragonal with space group I-4, Z =2, a = 12.1801(17) Å, b = 12.1801(17) Å, c = 6.8890(14) Å, V = 1022.0(3) Å 3 and R 1 = 0.0330 at 293 K. There is one independent molecule in the unit cell and neithe...

Purpose Roller burnishing (RB) is a finishing treatment method that is used to impart certain physical and mechanical properties, such as surface roughness, improved visual appearance, or increased corrosion, friction, wear, and fatigue resistance. The purpose of this paper is to study, the influence of RB on corrosion resistance in A53 steel in HC...

Adsorption of thiols on metallic surfaces is one of the methods used for their removal from the environment. Alkanethiols and their degradation products have been detected in the environment and classified as highly toxic with distinctive odor at very low concentrations. 1-octadecanethiol is a representing example of this family and its adsorption...

In this work, the interaction, crystallization and morphology of membranes derived from polyamides/poly (vinylalcohol) (PA/PVA, PA: PA66, PA69, PA610 and PA612) blend materials are studied at various weight fractions and various crystallization temperatures. The experimental work includes differential scanning calorimetry (DSC), Fourier transform i...

In this work, corrosion inhibition in steel water pipes, used in Jordan National Water Supply Network (JNWSN), is studied in different corrosive media by adsorption of ammonium pyrrolidine dithiocarbamate (APDTC) on the surface of the pipes. APDTC is a nontoxic material widely used in agricultural applications. The experimental work utilized mainly...

This paper discusses the concept of water quality and stability, describes various indices available to assess the scale formation (protective layer) and corrosivity of water and the methods of their calculation for different tap water resources in Tafila City, south Jordan. The saturation levels are calculated by Langelier saturation index (LSI),...