Dr. Ahmed Mohammed Abu-Dief Mohammed

Prof. Assistant - Assistant professor of Inorganic and Physical Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street



Publications Which contain the keyword: Adsorption

A comparative study for the effect of nano-sized Moringa oleifera and Delonix regia for removal heavy ions from water
The ability of natural biosorbents for removing heavy metal ionswere investigated by studying the effect of nano sized _Delonixregia _and _Moringa__ oleifera_on adsorption of Cd2+and Pb2+ions from aqueous solution. The investigated biosorbents (_Delonixregia_and _Moringa__oleifera)_ were characterized by FT-IR, SEM, TEM, XRD and EDS techniques.The influence of pH, temperature, adsorbent dosage, contact time and initial metal ion concentration on adsorption process ... Read more

2018-12-28 18:31:18 Keywords Adsorption,
Towards an accurate estimation of the isosteric heat of adsorption – A correlation with the potential theory
Accurate estimation of the isosteric heat of adsorption is mandatory for a good modeling of adsorption processes. In this paper a thermodynamic formalism on adsorbed phase volume which is a function of adsorption pressure and temperature has been proposed for the precise estimation of the isosteric heat of adsorption. The estimated isosteric heat of adsorption using the new correlation has ... Read more

2018-12-28 17:51:48 Keywords Adsorption,
A state of the art of required techniques for employing activated carbon in renewable energy powered adsorption applications
This paper reviews, for the first time, the measurement adsorption characteristics techniques to facilitate optimal testing of the validity of adsorbent materials in adsorption applications. Thermo-physical properties, adsorption characteristics and modelling techniques are presented. The characterisation of material thermophysical properties includes true and bulk densities, specific heat capacity, surface area, pore volume distribution and thermal conductivity. The adsorption characteristics were ... Read more

Carbon steel pipelines corrosion inhibition by some novel imines during acidizing treatment of oil wells: Electrochemical and quantum chemical studies
The corrosion protection of the equipments and vessels is one of chief concerns of the maintenance and design engineers. From this point of view, three novel imine compounds were prepared and their structures were characterized by X-ray, 13C-NMR, 1H-NMR, mass, UV-Vis, FT-IR, spectral data and elemental analyses. The corrosion inhibition of the investigated inhibitors towards carbon steel in 15% HCl ... Read more

2018-11-21 19:53:47 Keywords Cooling, Activated carbon, Adsorption, thermal conductivity,
Effect of improving thermal conductivity of the adsorbent on performance of adsorption cooling system
In this paper, effect of using metallic additives on thermal conductivity of granular activated carbon has been investigated. Fillings of iron, copper and aluminum at different mass concentrations ranging from 10 to 30% have been studied. The thermal conductivity of the combinations has been estimated experimentally. The thermal conductivity has been increased with the increase in metal concentrations. A mathematical ... Read more

Disposal of Heavy Transition Cd(II) ions from Aqueous Solution utilizing Nano Sized Flamboyant Pod (Delonix regia)
The absorption of toxic heavy metal by natural adsorbents from water were indicated by investigation the effect of nano sized (_Delonix regia _(DR)) and (CADR) citric acid_ Delonix regia_ chemically modified adsorbent for removing the Cd2+ ions. Different techniques were employed for characterizing the adsorbent (_Delonix regia_) such energy dispersive analysis of X-ray (EDAX), Fourier transform infrared spectroscopy (FT-IR), Transmission ... Read more

High surface area nanostructured activated carbons derived from sustainable sorghum stalk
The Durra (Sorghum) stalk was employed as a novel precursor for the formation of high surface area activated carbons (ACs) by utilizing ZnCl2 as activating agent followed by pyrolysis in a flow ofN2 gas. The formation of ACs has been investigated at different pyrolysis temperatures (400, 500 and 600 °C) and different ZnCl2 impreg- nation concentrations. The results indicated that, ... Read more

2018-10-18 00:14:42 Keywords Adsorption, desorption, ammonium, Zeolite,
خواص ادمصاص وانطلاق الأمونيوم بواسطة معادن الزيوليت
The adsorption of ammonium (NH+4) on zeolite was studied using initial NH+4 concentrations of 100, 200, 400, 600, 800 and 1000 mg/L 0.5, 1 and 2 g of zeolite samples. The suspensions were shaken for 1 h at the room temperature and then centrifuged and were analyzed for the remaining NH+4 cation in the solutions. The difference between the initial ... Read more

Adsorption of the heavy metal ions onto biosorbents: A review
Heavy metal pollution in result of human activities such as mining has become a critical environmental issue nowadays. Various methods for removing heavy metal from industrial wastewater have been investigated. This paper reviews an economic and environment friendly process known as biosorption. Biosorption is a potential alternative to the conventional treatment processes such as adsorption on activated carbon. Some factors ... Read more