Article
Chemistry, Physical
Chuncai Yao, Chenxi Zhu
Summary: A new multi-mechanism kinetic model for batch adsorption is proposed in this study, where a dimensionless parameter serves as a mechanism indicator. The model can convert to different adsorption kinetics models as the dimensionless parameter changes values. The estimated mass transfer coefficients show a reasonable agreement with literature values.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
O. O. Zhokh, A. I. Trypolskyi, P. E. Strizhak
Summary: Different kinetic models can fit experimental data equally well, but cannot be distinguished based on the values of kinetics constants. This paper proposes an intraparticle diffusion approach to discriminate between kinetic models by analyzing the effectiveness factor. By investigating the process rate under reaction-rate control and internal diffusion control, the kinetic scheme can be easily distinguished.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
John P. Wakefield, Aaron M. Lattanzi, M. Brennan Pecha, Peter N. Ciesielski, Jesse Capecelatro
Summary: This article presents a methodology for modeling multi-step reaction rates in porous catalyst particles. The method accurately captures the cascading reaction systems common in high temperature vapor-phase chemical reactors. The article also provides solutions for various catalyst shapes and discusses the computational challenges caused by diffusion limitations.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Guojia Yu, Dongyu Jin, Fan Zhang, Shichao Tian, Zhiyong Zhou, Zhongqi Ren
Summary: This study used novel porous liquids to achieve the desulfurization process of fuel oil, and improved the desulfurization performance through electrostatic interaction and microporous structure. The experimental results showed that the porous liquids have dual functions of extraction and adsorption. This new type of solvent has great potential for application and research value.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Mustafa A. Fawzy, Mohamed Gomaa
Summary: The utilization of biorefinery waste from Sargassum latifolium for the preparation of an environmentally friendly xerogel showed high adsorption efficiency for Methylene Blue (MB) and Congo Red (CR). The developed xerogel is suitable for cationic and anionic dye removal from single or multicomponent dye containing effluents, making it an environmentally benign biosorbent.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Environmental Sciences
Fitfety M. Teshager, Nigus G. Habtu, Kibret Mequanint
Summary: This study demonstrates the efficient removal of cellulose-reactive anionic dyes using water hyacinth root powder (WHRP) bioadsorbent. By adjusting adsorption conditions such as pH, adsorbent dose, dye concentration, particle size, mixing speed, and temperature, the adsorption performance can be effectively enhanced. The adsorption process exhibits spontaneity and exothermicity in terms of Gibbs free energy and enthalpy, and is controlled by multiple mechanisms.
Article
Engineering, Environmental
Hyokyung Kim, Kwang-Jun Ko, Masoud Mofarahi, Kyung-Min Kim, Chang-Ha Lee
Summary: This study elucidates the adsorption characteristics of low-concentration tetrahydrothiophene (THT) and tert-butyl mercaptan (TBM) in CH4 on Cu-impregnated activated carbon (Cu/AC). THT removal is dominated by physical adsorption, allowing facile regeneration by N2 thermal treatment. TBM removal is primarily carried out by chemical adsorption utilizing CuO, Cu2O, and oxygen on the AC.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Fabiano Bisinella Scheufele, Eliane Soares da Silva, Barbara Bulhoes Cazula, Daniel Sena Marins, Rodrigo Sequinel, Carlos Eduardo Borba, Giovani Silvero Patuzzo, Thiago Fernando Magrini Lopez, Helton Jose Alves
Summary: This study evaluated the H2S removal by a microporous babassu-derived biochar in a fixed bed column under low pressure and temperature conditions. A mathematical model was developed to describe equilibrium and mass transfer kinetics, showing that the biochar displayed desirable textural properties and high affinity for the H2S system. The model had predictive capacity and could support the design and scale-up of adsorption systems.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Chemistry, Applied
Biswajit Saha, Sundaramurthy Vedachalam, Ajay K. Dalai
Summary: ADS is gaining attention as a low-cost desulfurization technique for petroleum fuels, utilizing adsorbents to remove sulfur compounds. The latest developments focus on enhancing selectivity, stability, reusability, and performance improvement through the incorporation of metals. Selectivity is a key challenge in ADS, and testing with real feedstocks is crucial for commercial application.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Thermodynamics
Lili Yu, Wei-Lun Hsu, Shubo Fei, Hirofumi Daiguji
Summary: This study investigates the adsorption kinetics of a silica gel bead using the volumetric method and proposes a comprehensive diffusion model. The rate-limiting step in the diffusion and adsorption process changes with increasing sample mass. The model successfully determines the effective mesopore diffusivity considering the effect of interparticle diffusion.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Multidisciplinary
ZeynabAlsadat Khatami Shal, Cheuk-Wai Tai, Michael Goepel, Roger Glaeser, Mozaffar Shakeri
Summary: In-situ growth of supported embryonic TS-1 zeolite (<10nm) on a silica support was achieved by steam-assisted crystallization(SAC). The use of low amounts of TPABr and steam at a moderate temperature of 130 degrees C was the key factor to control partial transformation of silica into supported embryonic TS-1. Supported embryonic TS-1 exhibits higher catalytic activity, resistance to poisoning, and selectivity compared to reference crystalline TS-1.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Environmental Sciences
Md Shahinoor Islam, Jin-Hyeob Kwak, Christopher Nzediegwu, Siyuan Wang, Kumuduni Palansuriya, Eilhann E. Kwon, M. Anne Naeth, Mohamed Gamal El-Din, Yong Sik Ok, Scott X. Chang
Summary: Biochar's effectiveness in removing contaminants, especially heavy metals, from water depends on biomass type and the purging gas used during production; the sorptive capacity of biochar is mainly influenced by biomass type and varies for different heavy metals based on the Langmuir adsorption model.
ENVIRONMENTAL POLLUTION
(2021)
Article
Polymer Science
Kankana Baruah, Riku Dutta, Simanta Doley, Bipul Sarma, Swapan Kumar Dolui
Summary: This study aims to use a cost-effective and high removal efficiency polymeric adsorbent to remove highly toxic heavy metal ions from underground water systems. The experimental results showed that the adsorbent had removal rates of nearly 80% for arsenic ions, 70.5% and 70.7% for lead and chromium ions, and 60.7% for cadmium ions.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Chemical
Mohammed Khisro Murshed, Arzu Yadigar Dursun, Gulbeyi Dursun
Summary: The present study investigates the removal of Astrazon Orange G dye from aqueous solutions using ZnO as a photocatalyst under UV-C light. The optimal conditions for dye removal are determined and the factors influencing the degradation of the dye are studied. The results demonstrate that ZnO exhibits excellent photocatalytic performance, with the chemical step largely controlling the reaction rate.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Akihisa Miyagawa, Ryosuke Ide, Shigenori Nagatomo, Kiyoharu Nakatani
Summary: In this study, the distribution behavior of single-stranded DNA molecules in silica particles was investigated. It was found that at high salt concentrations, the distribution kinetics followed a sigmoidal pattern. A model based on DNA aggregation successfully explained the sigmoidal distribution behavior, even when the number of DNA molecules involved in aggregation was greater than two. In addition, analysis using a pore and surface diffusion model revealed that the intraparticle diffusion of DNA aggregates mainly occurred through surface diffusion.
Article
Chemistry, Physical
Mohamed Sadou, Adel Saadi, Mohammed Hadj Meliani, Rami K. Suleiman, Tawfik A. Saleh
Summary: A facile synthetic method was used to prepare copper-modified SBA-15 catalysts. The catalysts showed high activity, which could be attributed to the well-dispersed copper nanoparticles on the mesoporous support.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Nasurullah Mahar, Muhammad Haroon, Tawfik A. Saleh, Abdulaziz A. Al-Saadi
Summary: A highly sensitive approach based on surface-enhanced Raman scattering spectroscopy has been developed for the detection of procainamide drug in water and spiked urine samples. The approach utilizes synthesized gold nanoparticles to enhance the Raman intensities, resulting in a wide linear range and high selectivity.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Taoreed O. Owolabi, Talal F. Qahtan, Olawusi Richard Abidemi, Tawfik A. Saleh, Oke Wasiu Adeyemi
Summary: This study focuses on modeling the energy gap of bismuth oxychloride semiconductor with oxygen vacancies using PSVR and STR models. The PSVR-Eg model shows significant improvement in performance and predicts the influence of lattice oxygen and oxygen vacancy on the semiconductor's energy gap. This provides new theoretical evidence for enhancing photocatalytic activity.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Tawfik A. Saleh, Mauliady Satria, Danah Al Moshawer, Hasan Al Abdulgader
Summary: The newly designed superwettable polymers with external stimuli-responsive behavior have aroused great research interest in the oil industry. In this study, advanced silica-based pH-responsive materials have been developed for oil/water separation using a simple dip-coating process. These smart materials exhibit excellent wettability conversion between superhydrophobicity-superoleophilicity and superhydrophilicity-underwater superoleophobicity, providing efficient separation for oil/water mixture. The results demonstrate outstanding superhydrophobic and superhydrophilic features, as well as high efficacy and flux for oil/water system.
SURFACES AND INTERFACES
(2022)
Article
Green & Sustainable Science & Technology
A. Q. Al-Gamal, T. A. Saleh
Summary: Highly efficient membranes were prepared by forming a polymer active layer embedded with amine-modified carbon nanotubes (CNTs) over a polysulfone support. The increase in the amount of amine-modified CNTs significantly improved the morphology, porosity, and hydrophilicity of the membrane, resulting in enhanced flux and salts/hydrocarbons separation.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Chemistry, Physical
Rooh Ullah, Mustafa Tuzen, Saif Ullah, Muhammad Haroon, Rozina Khattak, Tawfik A. Saleh
Summary: A series of novel mixed metal oxides (MOs) were prepared as supports for Ni/MOs using the double hydrolysis technique. The desulfurization study showed that the 10%NiZnO-Al2O3 adsorbent exhibited superior desulfurization performance with a breakthrough point of 10 ppm in model gasoline. The superior desulfurization performance was attributed to its higher Lewis and Lewis/Bronsted acid site ratio, higher surface area, larger pore size distribution, and lesser amount of inactive ZnAl2O4 spinel.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Ayman A. Alazab, Tawfik A. Saleh
Summary: An effective and low-cost method for fabricating superhydrophobic surfaces was investigated. The developed materials showed excellent water-repellency and exhibited significant oil absorption capacities, high separation efficiency, and reusability in the separation of oil-water. They also demonstrated outstanding oil selectivity in different salty waters and retained excellent separation even after 10 abrasion cycles with sandpapers. The prepared materials are promising for oil/water separation in harsh environments.
SURFACES AND INTERFACES
(2023)
Review
Chemistry, Analytical
Gowhar A. Naikoo, Fareeha Arshad, Israr U. Hassan, Fatima Ba Omar, Murtaza M. Tambuwala, Mujahid Mustaqeem, Tawfik A. Saleh
Summary: Diabetes mellitus is a rapidly rising chronic disease globally. Non-enzymatic sensors, known as fourth-generation glucose sensors, have been developed to overcome the limitations of enzymatic glucose sensors. Bimetallic nanocomposite-based sensors have gained attention due to their enhanced reproducibility and stability compared to monometallic nanomaterials.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mohammed Al-Yaari, Tawfik A. Saleh
Summary: Polyethyleneimine-grafted graphene oxide (PEI/GO) was synthesized by using graphene, polyethyleneimine, and trimesoyl chloride. The characterization results confirm the successful synthesis of PEI/GO and its strong interaction with lead (Pb2+) ions. The isotherm study reveals the adsorption process follows the Freundlich isotherm model, with a high maximum adsorption capacity. The prepared PEI/GO adsorbent shows promise for wastewater treatment due to its fast and high uptake removal capacity for Pb2+ ions and other heavy metals.
Article
Chemistry, Physical
Tawfik A. Saleh, Mulya Muhammad Nur, Mauliady Satria, Abdulrahman A. Al-Arfaj
Summary: In this study, highly inhibitive and high-temperature-resistant shale inhibitors were developed by grafting silica nanoparticles with hyperbranched APTMS and FOTS. The modified material displayed outstanding shale inhibition properties, with a hot rolling recovery test inhibition rate of approximately 96% compared to KCl standard test. The nanocomposite inhibitor also showed a significantly higher effectiveness in preventing water expansion into the original shale in the swelling test, with an inhibition rate of around 86% compared to KCl.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Imran Khan Rind, Ahmet Sari, Mustafa Tuzen, Muhammad Farooque Lanjwani, Isa Karaman, Tawfik A. Saleh
Summary: In this study, graphene nanoplatelets (GNP) were coupled with Staphylococcus aureus (S. aureus) for the adsorption of antimony (Sb) from water. The optimum conditions for composite dosage, initial concentration, pH level, contact time, and temperature were determined. The GNP/S. aureus composite exhibited promising adsorption capacity for Sb(III) ions in wastewater.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Imran Ali, Hasan M. Khan, Muhammad Naveed Akram, Yang-Fang Chen, Mujahid Mustaqeem, Tawfik A. Saleh, Muhammad Ahmad, Imran Sadiq, Nimra Lateef
Summary: Spinel ferrites with a composition of Ca0.5Ba0.5-xZnxFe2O4 were synthesized by sol-gel autocombustion and annealed at 650℃ for 6 hours. FTIR and XRD results confirmed the spinel structure and single-phase BCC structure. The samples exhibited average crystal sizes between 41.43 and 94.05 nm, and a decrease in lattice constant a value from 8.60 angstrom to 8.54 angstrom. Various parameters were calculated, including atomic packing fraction, bulk density, D-spacing, dislocation density, number of unit cells, porosity, strain, unit cell volume, volume of particles, and X-ray density.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Ayman A. Alazab, Tawfik A. Saleh
Summary: A superhydrophilic/underwater superoleophobic magnetic cellulose and acrylamide-modified polyurethane foam (Fe3O4-CE-AM@PUF) was prepared for efficient oil/water separation. The materials were characterized for their structure and morphology, showing excellent superhydrophilic/underwater superoleophobic properties. Fe3O4-CE-AM@PUF demonstrated high separation efficiency and flux for various oil-water mixtures, with the separation efficiency of n-Hexane remaining stable after 50 cycles. Its magnetic properties allowed easy removal with a magnet.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Construction & Building Technology
Intissar Ferrak, Rami K. Suleiman, Mahfoud Kadja, Mohammad Mizanur Rahman, Lina Boumediene, Fadi A. Al-Badour, Tawfik A. Saleh, Mohammed Hadj Meliani
Summary: This article investigates the hygrothermal behavior of round perforated bricks and its relationship with temperature. Experimental studies were conducted to determine various models that accurately describe the sorption isotherms and hysteresis phenomenon of the bricks. The study confirmed the significant impact of temperature on the hygrothermal behavior of the bricks, and validated the accuracy of the proposed models.
Article
Materials Science, Multidisciplinary
Tawfik A. Saleh
Summary: Apart from industrial production, increased fossil fuel consumption is also responsible for significant CO2 emissions. Photoreduction of CO2 into hydrocarbon fuels using solar energy is a promising method. This review discusses strategies to enhance the efficiency of CO2 photoreduction and different photocatalytic systems used for CO2 reduction.
BULLETIN OF MATERIALS SCIENCE
(2022)
