Mohammad W Amer

• Professor
• Professor of Analytical Chemistry at Department of Chemistry-School of Science-The University of Jordan

This study explores the adsorption potential of hydrothermally treated waste derived algal biomass for removing methylene blue (MB) dye. Synthesizing a modified hydrochar through hydrothermal carbonization (150°C, 35 bar) followed by NaOH modification, we observed enhanced thermal stability and distinctive chemical changes. Optimal conditions were...

The use of catalysts to promote sorbent regeneration is currently considered an effective method to reduce the energy required in CO2 capture processes. Aiming at identifying stable and cost-effective catalysts with high CO2 desorption efficiency, here we investigated the performance of fly ash (FA) during thermal regeneration of aqueous amine solu...

Blending two or more amines has recently been recognized as an efficient strategy to formulate competitive sorbents for post-combustion CO2 capture, as it allows to benefit from the advantages of each individual amine. In the present work, we devised four new dual-amine aqueous blends, based on the tertiary amine 2-dimethylamino-2-methyl-1-propanol...

The reactivity of kerogens from two different types of oil shales, marine Attrat oil shale from Jordan (type II kerogen, high sulfur) and lacustrine Colorado from USA (type I kerogen, low sulfur) has been studied. The kerogens were obtained using the NaOH/HCl demineralization method. The reaction products from the kerogens were compared with those...

The electronic effects electron donating and withdrawing groups R on the properties of N-(4-R-phenyl)-N'-(4-nitrophenyl)oxamito zincate(II) complexes was investigated featuring R = Me (a), H (b), F (c), Cl (d) and Br (e). The N-(4-R-phenyl)-N'-(4-nitrophenyl)oxamide ligands 2 were synthesized by reacting ethyl 4-nitrooxanilate with the respective 4...

Oil shale is a raw material that is considered to be an alternative fossil fuels and it is widely used in producing energy and chemicals. Oil shale bitumen identification are not widely described in literature. This article tackles the structural elucidation of oil shale bitumen using gas chromatography-mass spectrometry (GC-MS) and nuclear magneti...

The only method currently used for producing oil from oil shale is high temperature retorting, which is wasteful of energy and gives oil with a high content of heavy oil. The novel method of extraction used in this study, involving supercritical propane with tetrahydrofuran as a co-solvent, solves the problem of the high cost of producing oil by co...

Jordanian kaolinite was treated with two phosphate modifiers: sodium polyphosphate (MK 1) and sodium hexametaphosphate (MK 2). Both raw and modified kaolinites were characterised by XRD and FTIR techniques. The adsorption behaviour of Th(IV) and U(VI) ions onto the two modified kaolinites were studied as a function of dosage, contact time, pH and t...

Purpose: To study the adsorption of dye (E120) from aqueous solution onto activated carbon. Method: Factors influencing adsorption were examined and optimized. Three adsorption isotherm models (Langmuir, Freundlich and Temkin) were investigated. Agitation time was set at 72 hours, E120 dye concentration at 10-80 mg/L, pH at 7, temperature at 25 o C...

In view of promising adsorption efficiency of clay based materials, a modified iron-kaolin clay was used as an adsorbent of Pb(II) and Cd(II) ions from aqueous solutions. The effects of various experimental parameters, such as initial metal ions concentration, contact time, temperature and pH were investigated. The Langmuir and Freundlich adsorptio...

Development of a sustainable route for preparation Fe(OH)3/kaolinite nanoplatelets from Batin El-Ghoul clay deposits, south Jordan with uniform platelike morphology. Fe(OH)3/kaolinite nanoplatelets is an efficient adsorbent for the removal of Pb(II) ions from aqueous solutions. Effects of pH solution, adsorbent dose, initial metal ion concentration...

Thermal degradations of biomass corn leaves were studied for kinetic modeling. Thermogravimetric-differential analyzer runs at 5, 10, 20, and 30 °C min ⁻¹ heating rates were employed. Apparent activation energy and frequency factor values were calculated for first-order kinetics using several procedures. The procedure of Coats and Redfern showed 28...

The inherent reactivity of kerogens isolated from marine oil shales has not been extensively studied. Determining the conversion and products of demineralized oil shales simplifies modelling of oil shale pyrolysis because the complications introduced by the mineral matter are removed. Accordingly, the reactive behaviour of demineralized products (k...

The increase in energy demand, especially in Jordan, has encouraged researchers to consider alternative sources of energy, such as biofuel production from agricultural waste. For this study, Jordanian corn leaf waste was characterized by ultimate and proximate analysis, TGA, FTIR and solid state ¹³C NMR. The waste showed high volatile matter, high...

In view of advantages of green synthesis, a novel green route for the synthesis and stabilization of copper nanoparticles (CuNPs) using aqueous extract of Citrus limon fruits at room temperature was reported. The formation of CuNPs is monitored by recording the UV–vis absorption spectra for surface Plasmon resonance (SPR) peak (∼579 nm). X-ray diff...

Metal oxides nanoparticles/clay nanocomposites attractd much attention as an adsorbent for the removal of metal ions. TiO2/kaolinite nanocomposite was prepared from the raw Jordanian kaolin clay and evaluated for the removal of Pb(II) and Cd(II) ions from aqueous solutions through adsorption process. The removal percent (%R) of metal ions was deter...

An eco-friendly green route for synthesis copper oxide nanoparticles (CuONPs) by Ailanthus altissima leaf aqueous extract was reported. The synthesized copper oxide nanoparticles were characterized in terms morphology, crystalline nature, structural and antibacterial activity with UV-vis, SEM, TEM, FT-IR analysis tools. The synthesized copper oxide...

Few comparisons have been made between low-aromaticity marine and lacustrine oil shales and their kerogens, because the reliability of structural analyses has been limited by a reliance on only one method of kerogen isolation, HCl-HF. Therefore, a detailed analysis by ¹³C NMR and X-ray photoelectron spectroscopy (XPS) was made for Attrat marine oil...

Two oil shales from Jordan, El-Lajjun (EL) in the centre of the country and Isfir Al-Mahata (IA) in the south, have been analysed by elemental analysis, XRF, XRD, FTIR, TGA and 13C NMR. Both oil shales have high S contents and atomic H/C ratios. The calorific value of EL (1630 ± 10 kcal/kg) was similar to that of IA (1571 ± 13 kcal/kg). IA has high...

Marine oil shale from the Sultani mine was characterized (ultimate and proximate analysis, ¹³C NMR, differential thermogravimetry (DTG)). The ¹³C NMR indicated that the shale is highly aliphatic, and the concentration of carbonyl carbon is small. DTG indicated a total weight loss of 21 wt% to 550 °C. The shale was pyrolysed to different final tempe...

The organic matter (kerogen, defined as including the organic material soluble and insoluble in organic solvents at room temperature) from two marine oil shales, El-Lajjun (Jordan) and Julia Creek (Queensland, Australia), has been extracted by the commonly used HCl-HF method and the resulting products compared with those obtained using the NaOH-HCl...

In this paper, a one pot and easy method at room temperature, a modification macro-particles of Jordanian raw kaolin clay by hydrochloric acid and hydrogen peroxide to obtain Nano-crystalline kaolinite as an adsorbent for the removal of As(V) from aqueous solutions. Nano-crystalline kaolinite was characterized by XRD, FT-IR, and SEM. The adsorption...

The oil shale (OS) sample from Sultani mine, southern Jordan, was subjected to thermogravimetric/differential thermogravimetric (TG/DTG) and differential scanning calorimetry (DSC) analysis. Analysis was used to determine the kinetic parameters in the 300–540 °C temperature range, employing different heating rates (3, 5, 10, 20, 30 °C/min). The fir...

The adsorption of Zn(II), Cu(II) and Cd(II) ions from aqueous solution onto nano-structured kaolinite (NSK) has been investigated. In this study, the effects of adsorbent dose, solution pH, initial metal concentration, contact time and temperature were determined. Thermodynamic parameters, the negative values of δG° revealed that the adsorption pro...

Oil shale samples from Sultani oil shale mine south of Jordan was paralyzed by partially combusted to generate shale oil. The produced water was sent for analysis. The different samples were analyzed for carbon content and results showed that the TOC was 2010 mg per liter of retorted water. Phenol and arsenic content were measured and found to be 6...

Oil shales from two different continents (Australia and North America) of different ages (100 and 40 million years) and origins (one marine, one lacustrine) have been reacted in the range 355-425 °C under H2 or N2 for 1 or 5 h with or without the addition of catalyst. The shales differed in S content, and the nature of the mineral matter, but both...

Four oil shales from different locations and origins have been reacted in a flow-through system (425 °C, with N2 or H2 as sweep gases at 1 atm pressure) with a view to more closely simulating a practical process for oil shale conversion than can be achieved with a sealed autoclave system. It was observed that there was no general correlation betwee...

Background Biosorption of Cu (II), Ni(II), Zn(II) and Pb(II) ions from aqueous solutions onto Sophora japonica pods powder has been studied using batch adsorption technique. The biosorption studies were determined as a function of pH, contact time, initial metal ion concentration, biosorbent dosage and temperature. Results The kinetic study show...

Background Biosorption of Cu (II), Ni(II), Zn(II) and Pb(II) ions from aqueous solutions onto Sophora japonica pods powder has been studied using batch adsorption technique. The biosorption studies were determined as a function of pH, contact time, initial metal ion concentration, biosorbent dosage and temperature. Results The kinetic study showed...

A simple method is used for the study of adsorption of Sudan (III) dye using activated carbon. Activated carbon was found to be effective for taking up the dye, with maximum capacity of 7.8 mg/g at 40 o C under the following experimental conditions: mass of carbon 0.2 g, volume of solution 50 mL, dye concentration range 10–50 mg/L and particle diam...

Reactions of five Jordanian oil shales, Yarmouk in the north, El-Lajjun, Sultani and Attrat Um Ghudran in the center and Ma’an in the south have been carried out at 355 °C, 390 °C and 425 °C for 1 h under N2 or H2. The shales showed significant differences in reactivity, with central and northern Jordanian oil shales being more reactive on a dmmf b...

A high sulfur Jordanian oil shale was converted into liquid hydrocarbons by reaction at 390 °C under N2, and the dichloromethane soluble fraction of the products was isolated then analyzed by using gas chromatography (GC). Comprehensive two-dimensional GC (GC×GC) and multidimensional GC (MDGC) were applied for component separation on a polar – non-...

Flame photometric detection in the sulfur channel has been evaluated for sulfur speciation and quantification in comprehensive two-dimensional gas chromatography [GC×GC-FPD(S)] for S-compound speciation in shale extracts. Signal non-linearity and potential quenching effects were reportedly major limitations of this detector for analysis of sulfur i...

A Jordanian oil shale from the El Lajjun deposit has been reacted with N2, H2 and CO in the presence and absence of water in the temperature range 300–425 °C. The effect of adding Fe, Cu, Ni, Sn and NaAlO2 as potential catalysts to some of these reactions has been studied but none led to improved oil yields. Most of the organic material in the oil...

The viscosity index (VI) and the base number (BN) of motor oils are the most important parameters to be measured in order to assess their performance and service time. Both parameters were simply obtained for virgin and recycled motor oil samples using multivariate calibration based on the FTIR data. Analysis showed that the PLS-1 has outperformed...

The aim of this research work is to determine the potential of application of sodium polyphosphate-modified kaolinite clay as an adsorbent for the removal of lead (II), zinc (II) and cadmium (II) ions from aqueous solutions. The adsorbent dosage, pH, temperature and contact time were investigated. The adsorption isotherms of all three metal ions fo...

In this paper, an attempt has been made to develop a feasible procedure for the prediction of quality parameters of motor gasoline and to discriminate between the different adulterated motor gasoline samples using density values, distillation temperatures and Fourier transform infrared (FTIR) analyses along with multivariate calibrations without th...