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Absorption Of Carbon Dioxide Into Aqueous Ammonia Solution Using Blended Promoters (Mea, Mea+Pz, Pz+Argk, Mea+Argk), Farah Al-Sudani Aug 2026

Absorption Of Carbon Dioxide Into Aqueous Ammonia Solution Using Blended Promoters (Mea, Mea+Pz, Pz+Argk, Mea+Argk), Farah Al-Sudani

Engineering and Technology Journal

Absorption of CO2 into promoted-NH3 solution utilize a packed column (1.25 m long, 0.05m inside diameter) was examined in the present work. The process performance of four different blended promoters monoethanolamine (MEA)+ piperazine (PZ), piperazine (PZ)+ potassium argininate (ArgK) and monoethanolamine +potassium argininate was compared with unpromoted-NH3 solution by evaluated the absorption rate (φ_(CO_2 )) and overall mass transfer coefficient (K_(G,CO_2.) a_v) over the operating ranges of the studied process variables (1-15Kpa initial partial pressure of CO2, 5-15 Liter/min gas flow rate, 0.25-0.85 Liter/min liquid flow rate). The results exhibit that the absorption behavior and efficiency can be enhanced by …

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Numerical And Experimental Explorations For The Formability Of Drawing Square Cups Through Deep Drawing Operation (January 2020), Nareen Obaeed Aug 2026

Numerical And Experimental Explorations For The Formability Of Drawing Square Cups Through Deep Drawing Operation (January 2020), Nareen Obaeed

Engineering and Technology Journal

This study aims to examine the formability of drawing cups having square shapes through direct deep drawing process on a single action press through one pass. This can be accomplished by conducting an FE simulation and performing an experimental investigation on steel substrate type AISI 1008 blank with diameter and thickness dimensions 80, 0.5 mm respectively. To explore and analyze the formability of such a drawing process, two process parameters have been included in this work which is the speed of punch (30 and 300 mm/min) and the lubrication state (with machine oil and dry drawing). Both direct and indirect …

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Effect Of Powder-Mixed Dielectric On Edm Process Performance, Safa Fadhil, Shukry Aghdeab Aug 2026

Effect Of Powder-Mixed Dielectric On Edm Process Performance, Safa Fadhil, Shukry Aghdeab

Engineering and Technology Journal

Electrical Discharge Machining (EDM) is extensively used to manufacture different conductive materials, including difficult to machine materials with intricate profiles. Powder Mixed Electro-Discharge Machining (PMEDM) is a modern innovation in promoting the capabilities of conventional EDM. In this process, suitable materials in fine powder form are mixed in the dielectric fluid. An equal percentage of graphite and silicon carbide powders have been mixed together with the transformer oil and used as the dielectric media in this work. The aim of this study is to investigate the effect of some process parameters such as peak current, pulse-on time, and powder concentration …

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Mechanical Properties Of Martensitic Stainless Steel (Aisi420) Subjected To Conventional And Cryogenic Treatments, Hareer Mohamed, Ali Ataiwi, Jamal Dawood Aug 2026

Mechanical Properties Of Martensitic Stainless Steel (Aisi420) Subjected To Conventional And Cryogenic Treatments, Hareer Mohamed, Ali Ataiwi, Jamal Dawood

Engineering and Technology Journal

Martensitic Stainless Steel (AISI420) MSS are vastly used because of their properties conventional which mix good mechanical and corrosion resistance. Cryogenic up to -196°C for different soaking time and heat treatments at (1000,500,200°C) for 15 minutes is one of the ways that used to enhance mechanical properties of these steels by means transformation of retained austenite, deformation regarding martensite then carbide refinement. the result showed an increase in tensile strength of samples that were treated cryogenically and tempered at 500°C was 933 (MPa) compared to samples that just treated conventionally in austenitizing and tempering at the same temperature that was …

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Hand Gesture Recognition Of Static Letters American Sign Language (Asl) Using Deep Learning, Abdulwahab Abdulhussein, Firas Raheem Aug 2026

Hand Gesture Recognition Of Static Letters American Sign Language (Asl) Using Deep Learning, Abdulwahab Abdulhussein, Firas Raheem

Engineering and Technology Journal

An American Sign Language (ASL) is a complex language. It is depending on the special gesture stander of marks. These marks are represented by hands with assistance by facial expression and body posture. ASL is the main communication language of deaf and people who have hard hearing from North America and other parts of the world. In this paper, Gesture recognition is proposed of static ASL using Deep Learning. The contribution consists of two solutions to the problem. The first one is resized with Bicubic static ASL binary images. Besides that, good recognition results in of detection the boundary hand …

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Pose Estimation Of Objects Using Digital Image Processing For Pick-And-Place Applications Of Robotic Arms, Firas Hameed, Hasan Alwan, Qasim Ateia Aug 2026

Pose Estimation Of Objects Using Digital Image Processing For Pick-And-Place Applications Of Robotic Arms, Firas Hameed, Hasan Alwan, Qasim Ateia

Engineering and Technology Journal

Robot Vision is one of the most important applications in Image processing. Visual interaction with the environment is a much better way for the robot to gather information and react more intelligently to the variations of the parameters in that environment. A common example of an application that depends on robot vision is that of Pick-And-Place objects by a robotic arm. This work presents a method for identifying an object in a scene and determines its orientation. The method presented enables the robot to choose the best-suited pair of points on the object at which the two-finger gripper can successfully …

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Hydrogeological And Hydro Chemical Evaluation Of Groundwater In Karbala Region Using Geographic Information System (Gis), Marwa Hussein, Imzahim Alwan, Tariq Hussain Aug 2026

Hydrogeological And Hydro Chemical Evaluation Of Groundwater In Karbala Region Using Geographic Information System (Gis), Marwa Hussein, Imzahim Alwan, Tariq Hussain

Engineering and Technology Journal

The study area is located in the holy governorate of Karbala, Iraq; the research studied a predictive mathematical model of groundwater within Dibdiba Formation and by fifty (50) wells distributed randomly within the boundaries of the study area, all of them fall within the unconfined aquifer. Likewise, there is no component to direct the activity of these wells, where a mathematical model for the study area has been developed using the groundwater system modeling program (GMS v.10). The area was divided into a grid where the dimensions of a single cell ranged from 250m×250m. The model of the steady flow …

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Considerations On Spark- Gap Channel Radius And Electrical Conductivity, Bassam Habib Aug 2026

Considerations On Spark- Gap Channel Radius And Electrical Conductivity, Bassam Habib

Engineering and Technology Journal

A simple phenomenological model is established to determine the temporal evolution of spark gap channel radius and electrical conductivity during the resistive phase period. The present determination is based on the Braginskii’s equation for the channel radius which includes the electrical conductivity of the discharge channel as a constant quantity. In the present model, however, the electrical conductivity is regarded as a time varyingquantity. Basing on this, a mathematical formulation for the channel radius as a function of time was derived, and this has made possible the derivation of an explicit expression for the conductivity as a function of time …

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Key Generation From Multibiometric System Using Meerkat Algorithm, Duha Salman, Raghad Azeez, Abdul Mohssen Hossen Aug 2026

Key Generation From Multibiometric System Using Meerkat Algorithm, Duha Salman, Raghad Azeez, Abdul Mohssen Hossen

Engineering and Technology Journal

Biometrics are short of revocability and privacy while cryptography cannot adjust the user’s identity. By obtaining cryptographic keys using biometrics, one can obtain the features such as revocability, assurance about user’s identity, and privacy. Multi-biometrical based cryptographic key generation approach has been proposed, subsequently, left and right eye and ear of a person are uncorrelated from one to other, and they are treated as two independent biometrics and combine them in our system. None-the-less, the encryption keys are produced with the use of an approach of swarm intelligence. Emergent collective intelligence in groups of simple autonomous agents is collectively termed …

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Diffraction Rings Pattern And Nonlinear Optical Properties Of Hybrid Zno-Nps / Epoxy Resin, Zahraa Al-Asady, Ali Al-Hamdani Aug 2026

Diffraction Rings Pattern And Nonlinear Optical Properties Of Hybrid Zno-Nps / Epoxy Resin, Zahraa Al-Asady, Ali Al-Hamdani

Engineering and Technology Journal

In this research, the diffraction ring patterns scan and single-beam Z-scan techniques were used to measure the nonlinear refractive index (n2) and nonlinear absorption coefficient (β). Nano-composite sample, which consists of zinc oxide nanoparticles (ZnO-NPs), and epoxy resin polymer. The sample was prepared by the casting method. A second harmonic generation Nd: YAG laser, which operates at 532 nm and intensity 3183 W/cm2 was used for the two techniques. Z-scan results showed that values for nonlinear refractive index n2 and nonlinear absorption coefficient β were obtained of 6.59*10-9 cm2/W and 1.75*10-3 cm/W respectively. While results for the D-scan technique showed …

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Production Of Self-Cleaning Sio2/Cnt Nanoparticles Substituted Cement Mortar, Layth Al-Gebory, Aseel B. Al‐Zubaidi, Ahmed A. Al‐Tabbakh Aug 2026

Production Of Self-Cleaning Sio2/Cnt Nanoparticles Substituted Cement Mortar, Layth Al-Gebory, Aseel B. Al‐Zubaidi, Ahmed A. Al‐Tabbakh

Engineering and Technology Journal

Manufacturing of building materials with unique properties is one of the most important key-parameters in the development of construction engineering and building materials. The development in the nanomaterials and nanotechnology can be utilized in this field. In this paper, production of eco-friendly, low water absorption and self-cleaning cement mortar reinforced with carbon nanotubes and nano-silica with different weight percentages (0.5%, 1.5%, and 2%) is performed. Results showed prominent improvement of hardness, compression strength and a decrease of water absorption and bending resistance in the reinforced cement mortars. The results show the possibility to control the mechanical properties of the cement …

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Automated Analysis Of Comments On Press Articles In Websites (Articles Literature As Case Study), Afra Abdulrahman, Abdul Monem Rahma Aug 2026

Automated Analysis Of Comments On Press Articles In Websites (Articles Literature As Case Study), Afra Abdulrahman, Abdul Monem Rahma

Engineering and Technology Journal

Due to the increasing electronic publishing sites for printed and certified newspapers, the reader faced the problem of reaching his goal by accessing these sites, which led to the neglect of a large section of important publications. The provision of an automated measure to verify the positive and negative articles based on the analysis of readers' comments on the articles is a necessity to see the important articles that are compatible with the corpus generated by us for inference. The project achieved the previous target and achieved a success rate. The Bag-of-Words Model (BoW) was used to obtain the repetition …

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Extraction Of Rare Earth Elements From Iraqi Phosphate Ore By Using Of Tributyl Phosphate, Muna K. Abbass, Moayyed G. Jalhoom, Aya M. Kadhim Aug 2026

Extraction Of Rare Earth Elements From Iraqi Phosphate Ore By Using Of Tributyl Phosphate, Muna K. Abbass, Moayyed G. Jalhoom, Aya M. Kadhim

Engineering and Technology Journal

Iraqi phosphate ore deposits have been ascertained to be the second global reserve after Morocco, it has been utilized successfully at Al-Qaim phosphate fertilizers complex in the period 1983-2009. The deposit has valuable content of rare piles of earth and uranium, which is expected to have a good impact on the Iraqi economy if they are recovered from the ore. In the present study, solvent extraction was employed for the extraction of the rare earth elements (REEs), tributyl phosphate (TBP) in kerosene was utilized for extracting ytterbium, yttrium, erbium, and lanthanum from an aqueous solution made via the nitric acid …

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Design Of Efficient Inductive Power Link With Small Size Planar Spiral Coil Receiver For Medical Applications, Muammer M. Omran, Ahmed S. Ezzulddin, Saad Mutashar Aug 2026

Design Of Efficient Inductive Power Link With Small Size Planar Spiral Coil Receiver For Medical Applications, Muammer M. Omran, Ahmed S. Ezzulddin, Saad Mutashar

Engineering and Technology Journal

The efficiency of a WPT system greatly depends on both the geometry and operating frequency of the transmitting and receiving structures. Genetic optimizations algorithms are presented to prepare the proposed design parameters using MATLAB to optimize the link efficiency. Single and double layer PSCs are optimally designed with minimal proximity losses effect. In this paper, we used the benefit of a double layer technique to miniaturize the receiver PCS size. The proposed single layer (10×10) mm2 and double layer (8×8) mm2 PSCs are validated and simulated using HFSS 15.03 software at a frequency of 13.56MHz in both cases of the …

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The Characterization And Modeling The Mechanical Properties Of High Strength Concrete (Hsc) Modified With Fly Ash (Fa), Saman M. Kamal, Jalal A. Saeed, Ahmed Mohammed Aug 2026

The Characterization And Modeling The Mechanical Properties Of High Strength Concrete (Hsc) Modified With Fly Ash (Fa), Saman M. Kamal, Jalal A. Saeed, Ahmed Mohammed

Engineering and Technology Journal

One of the main challenges facing Civil Engineering community is to modify cement quantity in the mix design by admixtures to enhance the mechanical properties. According to more than 1000 data from literature, mechanical characteristics of concrete modified with FA were discussed. The statistical variation with modeling were achieved by set of data. The cement was replaced up to 70% with FA (weight of dry cement) and by cube of concrete testing up to 90 days of curing time and different w/c ratio. The compressive strength of concrete varied from 18-67 MPa, while, for modified concrete with FA, compressive strength …

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Improvement Of Image Steganography Using Discrete Wavelet Transform, Manal K. Oudah, Aqeela N. Abed, Rula S. Khudhair, Saad M. Kaleefah M. Kaleefah Aug 2026

Improvement Of Image Steganography Using Discrete Wavelet Transform, Manal K. Oudah, Aqeela N. Abed, Rula S. Khudhair, Saad M. Kaleefah M. Kaleefah

Engineering and Technology Journal

Recently the Discrete-Wavelet-Transform (DWT) has been represented as signal processing powerful tool to separate the signal into its band frequency components. In this paper, improvement of the steganography techniques by hiding the required message into the suitable frequency band is presented. The results show that the increase of the message length will reduce the Peak Signal to Noise Ratio (PSNR), while the PSNR increases with the increasing the DWT levels. It should be noted that the PSNR reduction was from -13.8278 to -17.77208 when increasing the message length from 161 to 505 characters. In this context, the PSNR is increased …

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Numerical Investigations On Seismic Response Of Structures Under The Effect Of Infinite Boundary Of Soil-Structure Interaction, Qais Hasan, Saad Al-Wakel, Zahraa Zaidan Aug 2026

Numerical Investigations On Seismic Response Of Structures Under The Effect Of Infinite Boundary Of Soil-Structure Interaction, Qais Hasan, Saad Al-Wakel, Zahraa Zaidan

Engineering and Technology Journal

The damage caused by large earthquakes is not only due to structures but also due to the soil failure, where the dynamic response varies considerably from the fixed base state because of the interaction between the ground and the structure. The main objective of this paper is to study the effect of the infinitely extended soil on the dynamic response of the structure. A three-dimensional dynamic analysis of reinforced concrete buildingconsidering the effect of soil-structure interaction is performed. Building with a different number of stories rest on soil with various characteristics have been taken into consideration. For simulation of wave …

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An Experimental Investigation On Thermal Efficiency Of Flat Plate Tube Solar Collector Using Nanofluid With Solar Tracking Mechanism, Saad Hamidi Aug 2026

An Experimental Investigation On Thermal Efficiency Of Flat Plate Tube Solar Collector Using Nanofluid With Solar Tracking Mechanism, Saad Hamidi

Engineering and Technology Journal

In the present work, flat-plate solar collector (FPSC) in terms of various parameters as well as in respect of lower (Area of FPSC, volume fraction concentration of nanofluids, and mass flow rate) has been studied in this work. The FPSC has been fabricated with 0.192 m2, Dioxide silicon SiO2 (40nm) with the volume fraction of SiO2+Distilled water (0.05, 0.075, and 0.1%) and varying of flow rate (10, 15, 20L/h). These technological devices operate under forced circulation mode of fluid under varying climate conditions. The tracking mechanism has been used in the experiment of FPSC for tracking the sun position during …

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Survey Of User To User Recommendation System In Online Social Networks, Sammer Qader, Ayad Abbas Aug 2026

Survey Of User To User Recommendation System In Online Social Networks, Sammer Qader, Ayad Abbas

Engineering and Technology Journal

The widespread use of online social networks (OSN) and their applications by users lead to the lack of knowledge identification of their needs across the vast amount of data, which made the need to create systems that help people to solve the problems and make decisions with more accuracy, an example of these systems is the Recommendation system (RS), which helps users to make decision and save time in search on a commercial or personal level, one of the most critical types of recommendation systems is the friends recommendation system (FRS) . In this survey, several studies have been suggested …

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Recycling Of Waste Paraffin Wax By The Addition Of Sio2 Nano-Powders To Improve Thermal Conductivity, Aseel Al-Zubaidi Aug 2026

Recycling Of Waste Paraffin Wax By The Addition Of Sio2 Nano-Powders To Improve Thermal Conductivity, Aseel Al-Zubaidi

Engineering and Technology Journal

Paraffin wax is an important material used in thermal energy storage (TES) systems. The thermal conductivity of the material is an important parameter that decides the degree of exploitation of the paraffin wax in TES systems. The thermal conductivity is improved by the addition of silicon oxide nanoparticles (1%, 2%, 4%, and 6%) to the paraffin wax. The average size of the SiO2 particles is equal to 38 nm. The addition of SiO2 nano-particles at very small ratios was found to enhance the thermal conductivity of the paraffin wax considerably. SiO2 nanoparticles, add to paraffin wax, have a significant effect …

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The Reality Of University Education In Iraq: Problems And Solutions Through Adoption Of Credit Hours System, Ameer Morad Aug 2026

The Reality Of University Education In Iraq: Problems And Solutions Through Adoption Of Credit Hours System, Ameer Morad

Engineering and Technology Journal

Accreditation has been adopted in the system of credit hours in all international universities and most of the Arab universities because it is characterized by the consolidation of the principle of education and learning by adapting to the ability of the learner to accept the information while maintaining the level of scientific probity. However, few countries, including Iraq, have not adopted this type of education system. This paper presents a brief overview of the system of credit hours and the diagnosis of some of the problems facing education in Iraq at the present time, which rely on the old education …

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Rules For Managing Methods Of Implementation And Evaluation Of Graduation Projects In Engineering Departments, Fatimah Naser, Maryam Naser Aug 2026

Rules For Managing Methods Of Implementation And Evaluation Of Graduation Projects In Engineering Departments, Fatimah Naser, Maryam Naser

Engineering and Technology Journal

Graduation projects are the final product of what university students have acquired from the sciences and knowledge during their academic period of study during the academic years, which range in most Iraqi universities between 4 to 5 years in engineering colleges. In the last year during which the student to implement the engineering graduation project, which begins by choosing the subject or problem that will be dealt with as a research title and ends with the development of all stages of implementation. And the importance of graduation projects for students of engineering departments to study the bachelor's degree and the …

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Develop And Analyze A Model For Teaching According To The Flipped Class Approach, Ibtisam Hasan, Hatam Karem, Sahar Fafraj Aug 2026

Develop And Analyze A Model For Teaching According To The Flipped Class Approach, Ibtisam Hasan, Hatam Karem, Sahar Fafraj

Engineering and Technology Journal

In this paper, the flipped class strategy has been designed for electromechanical devices lessons. As a first step towards flipping the classroom two lessons are selected from the curriculum common. Delivering lecture content of selected topics before coming to class through notes and other media has been done, while the class time is effectively engaged in high-level thinking. The first step is to try to create the required educational materials to provide content related to topics outside of classroom environment. The second step is to design effective learning strategies for Problem Solving. JIGSAW method has been used for the in …

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Study The Effect Of Apply The Problem Based Learning In Engineering Education, Raed Hwayyin, Azhar Ameed Aug 2026

Study The Effect Of Apply The Problem Based Learning In Engineering Education, Raed Hwayyin, Azhar Ameed

Engineering and Technology Journal

The study examined the effect of application of the problem-based learning method of teaching engineering students in the Department of Petroleum Technology compared to traditional teaching methods (lecture). The problem-based learning method involved a number of assessments and exams that students individually and collectively performed. The study investigates the first class students of petroleum technology department of two subjects which are the calculus and engineering practice subjects. The study is use the statistical calculations to compare between applying the problem based learning and tradition method “lecture method” in engineering education, and taking into consideration the individual differences between students to …

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Assessing The Level Of Reflective Thinking In Engineering Teachers During The Process Of Research Action, Raudhah Ali, Abdulhadi Al-Saady, Najah Al Maimuri Aug 2026

Assessing The Level Of Reflective Thinking In Engineering Teachers During The Process Of Research Action, Raudhah Ali, Abdulhadi Al-Saady, Najah Al Maimuri

Engineering and Technology Journal

A hydrogeologic study has been adopted to conceptualize the concepts of groundwater levels lowering in swamped area of Tyass, middle of Iraq. 2D dimensional groundwater model and, mitigation model have been used to mitigate the aquifer against high salinity and chemical pollutants by the mitigation theory of heterogeneous subsurface media which basically depends upon physical and mathematical derivation, evaluation of chemical pollutants and total dissolved salts (TDS) of subsurface water before and after mitigation process. The water table level was lowered up to 2.43m at the center of a pumping well of abstraction discharge (400m3/day) obtained after 2755days in steady …

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Isolation And Identification Of Ureolytic Bacteria Isolated From Livestock Soil To Improve The Strength Of Cement Mortar, Hussein Khadhim, Saad Ammar, Shahlaa Ebrahim Aug 2026

Isolation And Identification Of Ureolytic Bacteria Isolated From Livestock Soil To Improve The Strength Of Cement Mortar, Hussein Khadhim, Saad Ammar, Shahlaa Ebrahim

Engineering and Technology Journal

The aim of the present study is to isolate and recognize calciumcarbonate-producing bacteria and to check these bacterial strains for use incement mortar to improve its properties such as strength and water absorption.Bacteria were isolated from livestock soils were examined for urease producingactivity, the possibility to precipitate calcite and its activity to improve thecompressive strength. Based on the results, four isolates were selected andidentified. They were characterized as B. atrophaeus, B. subtilis, B. aryabhattaiand B. amyloliquefaciens. Experimental work was performed to evaluate theeffect of bacterial concentration in term of optical density (OD) on thecompressive strength. Bacterial cement mortar samples revealed …

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Hydrogeologic Sustainability And Mitigation Of Shallow Groundwater Against High Saline And Chemical Pollutants, Najah Al Maimuri, Arkan Ali, Abdulhadi Al-Sa’Adi, Mohammed Abed Abed Aug 2026

Hydrogeologic Sustainability And Mitigation Of Shallow Groundwater Against High Saline And Chemical Pollutants, Najah Al Maimuri, Arkan Ali, Abdulhadi Al-Sa’Adi, Mohammed Abed Abed

Engineering and Technology Journal

A hydrogeologic study has been adopted to conceptualize the concepts of groundwater levels lowering in swamped area of Tyass, middle of Iraq. 2D dimensional groundwater model and, mitigation model has been used to mitigate the aquifer against high salinity and chemical pollutants by the mitigation theory of heterogeneous subsurface media, which depends upon physical and mathematical derivation, evaluation of chemical pollutants and total dissolved salts (TDS) of subsurface water before and after mitigation process. The water table level was lowered up to 2.43m at the center of a pumping well of abstraction discharge (400m3/day) obtained after 2755days in steady state. …

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Design Analysis Of A Compensation Technique In Fso Communication System To Mitigate Atmospheric Turbulence Effect, Jenan Kalati, Shehab Kadhim Aug 2026

Design Analysis Of A Compensation Technique In Fso Communication System To Mitigate Atmospheric Turbulence Effect, Jenan Kalati, Shehab Kadhim

Engineering and Technology Journal

Free-space laser communication systems usually experience strong channel fading caused by atmospheric turbulence. To mitigate the impact of atmospheric turbulence on free-space optical links using compensation techniques including adaptive optical (AO) system as advanced technique. Its three main components have remained constant: a wave front sensor to measure distortion, a wave front corrector to compensate for the distortion and a control system to calculate the required correction and necessary shape to apply to the corrector. Optical communication schemes utilizing adaptive optical at the transmitter are proposed. Numerical simulations show that the proposed schemes can significantly reduce the channel fading. The …

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Synthesis And Fabrication Of Zno Nanorods On Silicon For Methanol Gas Sensor, Abdulqader Faisal, Mofeed Jaleel, Fahad Kamal Aug 2026

Synthesis And Fabrication Of Zno Nanorods On Silicon For Methanol Gas Sensor, Abdulqader Faisal, Mofeed Jaleel, Fahad Kamal

Engineering and Technology Journal

Zinc Oxide nanorods (ZnO NRs) were successfully synthesized via hydrothermal method. The growth process was conducted with seed layer concentration of 30 mM. The as-synthesized nanostructures were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), and ultraviolet-visible (UV-VIS) spectrophotometer. The analysis results revealed a pure Wurtzite ZnO hexagonal nanostructures with preferred orientation (002) along c-direction. The calculated band gap and crystallite size are 3.2 eV and 53.18 nm respectively.  A methanol gas sensor was fabricated based on the annealed ZnO NRs on the silicon substrate. Optimized sensitivity at 250 ppm methanol vapor with fast response …

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Cement Based Solidification/Stabilization Leaching Performances Of Selected Heavy Metal Ions Under Different Ph Extractions, Basim A. Hussain Hussain, Shahlaa Ebrahim, Abbas Sulaymon Aug 2026

Cement Based Solidification/Stabilization Leaching Performances Of Selected Heavy Metal Ions Under Different Ph Extractions, Basim A. Hussain Hussain, Shahlaa Ebrahim, Abbas Sulaymon

Engineering and Technology Journal

Liquid to solid partitioning as a function of pH leaching Procedure LSP EPA method 1313 was carried out to test the effectiveness , performance and efficiency of the cement-based solidification / stabilization (S/S) of heavy metals contaminated sand samples using Ordinary Portland Cement OPC type A . Two cement based mix designs ( 7 and 25 % ) have been applied to (S/S) sand contaminated samples with different heavy metal ions ( Pb , Cu , Cr , and Cd ) having the following concentrations ( 500 , 1500 and 3000 mg / kg ). Fixed water to cement ratio …

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