Thomas Shean Yaw Choong
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View article: Controlled-release kinetics of hydrogen peroxide from dextran-coated calcium peroxide nanoparticles
Controlled-release kinetics of hydrogen peroxide from dextran-coated calcium peroxide nanoparticles Open
In this study, the controlled release kinetics of hydrogen peroxide (H 2 O 2 ) from dextran-coated calcium peroxide nanoparticles (DEX@CaO 2 (DEX) NPs) were investigated. CaO 2 NPs were synthesized and coated with dextran to regulate the r…
View article: The Recovery of Unburned Carbon from Coal Bottom Ash Using Froth Flotation: The Taguchi Optimization Method
The Recovery of Unburned Carbon from Coal Bottom Ash Using Froth Flotation: The Taguchi Optimization Method Open
The high consumption of coal in thermal power plants generates a significant amount of bottom ash, most of which is currently disposed of in landfills. However, the presence of unburned carbon in bottom ash limits its potential application…
View article: Optimized Degradation of Doxycycline in Aqueous Systems Using Calcium Peroxide Nanoparticles via Response Surface Methodology
Optimized Degradation of Doxycycline in Aqueous Systems Using Calcium Peroxide Nanoparticles via Response Surface Methodology Open
The presence of antibiotic residues in aqueous systems, particularly doxycycline (DOX), is harmful to the environment and public health. In this study, dextran-coated calcium peroxide nanoparticles (DEX@nCPs(DEX)), Fe(II), and oxalic acid …
View article: Esterification of Kenaf Core Fiber as a Potential Adsorbent for Oil Removal from Palm Oil Mill Effluent (POME)
Esterification of Kenaf Core Fiber as a Potential Adsorbent for Oil Removal from Palm Oil Mill Effluent (POME) Open
Palm oil mill effluent (POME) is a major contributor to industrial oily wastewater in Malaysia, demanding effective treatment solutions. This study explores the potential of esterified kenaf core (EKC) fiber as an oil adsorbent for oil rem…
View article: A novel CFD-MILP-ANN approach for optimizing sensor placement, number, and source localization in large-scale gas dispersion from unknown locations
A novel CFD-MILP-ANN approach for optimizing sensor placement, number, and source localization in large-scale gas dispersion from unknown locations Open
Illegal practices like open electronic waste incineration release hazardous pollutants, endangering the environment and human health. The Internet of Things (IoT) enables online real-time gas concentrations, but its capability to predict l…
View article: Microscopic insight into evaporation and condensation of binary system ammonia-water with the effect of hydrogen bond
Microscopic insight into evaporation and condensation of binary system ammonia-water with the effect of hydrogen bond Open
Ammonia recovery for fertilizer and energy production faces a critical bottleneck: inaccurate prediction of evaporation and condensation rates in dilute solutions due to strong hydrogen bonds between ammonia and water. The presence of thes…
View article: Mass transfer studies on the solvent-free lipase-catalyzed partial hydrolysis ofpalm oil in packed-bed reactor
Mass transfer studies on the solvent-free lipase-catalyzed partial hydrolysis ofpalm oil in packed-bed reactor Open
Packed-bed reactor (PBR) is widely employed for enzyme-mediated reactions at an industrial scale because the reactor configuration enables reusability of the biocatalyst with ease, thereby reducing the overall operating expenses. However, …
View article: Tailing Ash for the Removal of Methylene Blue from Aqueous Solutions by Batch Adsorption
Tailing Ash for the Removal of Methylene Blue from Aqueous Solutions by Batch Adsorption Open
One of the more problematic textile wastewaters to manage is dyeing wastewater, especially methylene-blue-containing wastewater. Its release has a significant negative impact on ecosystems, which could harm the environment. Adsorption tech…
View article: Prediction of tar yield produced from devolatilisation of empty fruit bunch in a fluidised-bed reactor using pseudo-equilibrium model
Prediction of tar yield produced from devolatilisation of empty fruit bunch in a fluidised-bed reactor using pseudo-equilibrium model Open
In this work, a pseudo-equilibrium model (PEM) is developed for prediction of yield and product from devolatilisation of empty fruit bunch (EFB). The yield of individual species (H2, CO, CO2, CH4, bio-oil, tar, and char) from the primary d…
View article: Kinetic study on the production of biodegradable lubricant by enzymatic transesterification of high oleic palm oil
Kinetic study on the production of biodegradable lubricant by enzymatic transesterification of high oleic palm oil Open
View article: Synthesis of Calcium Peroxide Nanoparticles with Starch as a Stabilizer for the Degradation of Organic Dye in an Aqueous Solution
Synthesis of Calcium Peroxide Nanoparticles with Starch as a Stabilizer for the Degradation of Organic Dye in an Aqueous Solution Open
One of the most significant environmental problems in the world is the massive release of dye wastewater from the dyeing industry. Therefore, the treatment of dyes effluents has received significant attention from researchers in recent yea…
View article: Effective Removal of Glyphosate from Aqueous Systems Using Synthesized PEG-Coated Calcium Peroxide Nanoparticles: Kinetics Study, H2O2 Release Performance and Degradation Pathways
Effective Removal of Glyphosate from Aqueous Systems Using Synthesized PEG-Coated Calcium Peroxide Nanoparticles: Kinetics Study, H2O2 Release Performance and Degradation Pathways Open
Glyphosate (N-phosphonomethyl glycine) is a non-selective, broad-spectrum organophosphate herbicide. Its omnipresent application with large quantity has made glyphosate as a problematic contaminant in water. Therefore, an effective technol…
View article: Kinetics Study on the Production of Biodegradable Lubricant by Enzymatic Transesterification of High Oleic Palm Oil
Kinetics Study on the Production of Biodegradable Lubricant by Enzymatic Transesterification of High Oleic Palm Oil Open
View article: Removal of Cationic Dyes by Iron Modified Silica/Polyurethane Composite: Kinetic, Isotherm and Thermodynamic Analyses, and Regeneration via Advanced Oxidation Process
Removal of Cationic Dyes by Iron Modified Silica/Polyurethane Composite: Kinetic, Isotherm and Thermodynamic Analyses, and Regeneration via Advanced Oxidation Process Open
Emerging dye pollution from textile industrial effluents is becoming more challenging for researchers worldwide. The contamination of water by dye effluents affects the living organisms in an ecosystem. Methylene blue (MB) and malachite gr…
View article: Investigation of Glyphosate Removal from Aqueous Solutions Using Fenton-like System Based on Calcium Peroxide
Investigation of Glyphosate Removal from Aqueous Solutions Using Fenton-like System Based on Calcium Peroxide Open
Glyphosate [N-(phosphonomethyl)-glycine], an organophosphate broad-spectrum herbicide, is a serious environmental contaminant that poses a significant threat to humans. It can be detected as a contaminant in water; thus, effective procedur…
View article: Investigation of glyphosate removal from aqueous solution using calcium peroxide
Investigation of glyphosate removal from aqueous solution using calcium peroxide Open
Glyphosate, an organophosphate herbicide containing carboxyl group, is widely used in agriculture. It can be found as a contaminant in water, and procedures are required for its removal. The present study investigated the efficiency of gly…
View article: Synthesis of Controlled-Release Calcium Peroxide Nanoparticles Coated with Dextran for Removal of Doxycycline from Aqueous System
Synthesis of Controlled-Release Calcium Peroxide Nanoparticles Coated with Dextran for Removal of Doxycycline from Aqueous System Open
Nanoscale calcium peroxide (nCP) has turned out to be one of the effective and environmentally friendly approaches for wastewater remediation purposes. The rapid hydrolysis of nCPs and burst oxygen release caused by the high surface-to-vol…
View article: A Heterogeneous Bifunctional Carbon Nanocatalyst from Plastic Waste to Efficiently Catalyze Waste Cooking Oil into Biodiesel
A Heterogeneous Bifunctional Carbon Nanocatalyst from Plastic Waste to Efficiently Catalyze Waste Cooking Oil into Biodiesel Open
In this study, black carbon derived from polyethylene terephthalate (PET) wastes was utilized as the precursor for heterogeneous bifunctional nanocatalyst, which successively catalyzed waste cooking oil into biodiesel. The nano-sized catal…
View article: Kinetic Study of Fenton-Like Degradation of Methylene Blue in Aqueous Solution Using Calcium Peroxide
Kinetic Study of Fenton-Like Degradation of Methylene Blue in Aqueous Solution Using Calcium Peroxide Open
The textile industry is one of the fastest-growing industries that significantly contribute to the economic growth in Malaysia. Dyeing wastewater is one of the more difficult to control in industrial wastewater. Methylene blue is a widely …
View article: Enzymatic Synthesis of Palm Oil-Based Trimethylolpropane Ester as Biolubricant Base Stock Catalyzed by Biocatalyst from Candida Antarctica (Lipozyme 435)
Enzymatic Synthesis of Palm Oil-Based Trimethylolpropane Ester as Biolubricant Base Stock Catalyzed by Biocatalyst from Candida Antarctica (Lipozyme 435) Open
View article: Trimethylamine functionalized radiation-induced grafted polyamide 6 fibers for p-nitrophenol adsorption
Trimethylamine functionalized radiation-induced grafted polyamide 6 fibers for p-nitrophenol adsorption Open
The method of pre-irradiation grafting was used with the aid of electron beam (EB) accelerator to accomplish the grafting of polyamide 6 fibers (PA6) with glycidyl methacrylate (GMA). The extent to which GMA was grafted on PA6 was found to…
View article: Advances in Valorization of Lignocellulosic Biomass towards Energy Generation
Advances in Valorization of Lignocellulosic Biomass towards Energy Generation Open
The booming demand for energy across the world, especially for petroleum-based fuels, has led to the search for a long-term solution as a perfect source of sustainable energy. Lignocellulosic biomass resolves this obstacle as it is a readi…
View article: Molecular Dynamics Simulation of Nanocellulose-Stabilized Pickering Emulsions
Molecular Dynamics Simulation of Nanocellulose-Stabilized Pickering Emulsions Open
While the economy is rapidly expanding in most emerging countries, issues coupled with a higher population has created foreseeable tension among food, water, and energy. It is crucial for more sustainable valorization of resources, for ins…
View article: Nanobiocatalysts for Biodiesel Synthesis through Transesterification—A Review
Nanobiocatalysts for Biodiesel Synthesis through Transesterification—A Review Open
Converting useless feedstock into biodiesel by utilizing the process of transesterification has been regarded as an alternative approach recently used to address the fuel and energy resources shortage issues. Nanobiocatalysts (NBCs), conta…
View article: Artificial Neural Network Method for Modeling of Microwave-Assisted Esterification of PFAD Over Mesoporous TiO <sub>2</sub>‒ZnO Catalyst
Artificial Neural Network Method for Modeling of Microwave-Assisted Esterification of PFAD Over Mesoporous TiO <sub>2</sub>‒ZnO Catalyst Open
View article: Insights into the<i>p</i>-nitrophenol adsorption by amidoxime-modified poly(acrylonitrile-<i>co</i>-acrylic acid): characterization, kinetics, isotherm, thermodynamic, regeneration and mechanism study
Insights into the<i>p</i>-nitrophenol adsorption by amidoxime-modified poly(acrylonitrile-<i>co</i>-acrylic acid): characterization, kinetics, isotherm, thermodynamic, regeneration and mechanism study Open
This study performs an appraisal of the adsorptive capacity of amidoxime-modified poly(acrylonitrile-co-acrylic acid) for thep-nitrophenol (PNP) adsorption, from aqueous solutions.
View article: Spirogyra Oil-Based Biodiesel: Response Surface Optimization of Chemical and Enzymatic Transesterification and Exhaust Emission Behavior
Spirogyra Oil-Based Biodiesel: Response Surface Optimization of Chemical and Enzymatic Transesterification and Exhaust Emission Behavior Open
Algae are emerging as a major and reliable source of renewable biodiesel that could meet the energy requirements of the world. Like plants, algae produce and store oils in their cells. Algal samples were collected from Gujrat District, Pak…
View article: Optimization Using Response Surface Methodology (RSM) for Biodiesel Synthesis Catalyzed by Radiation-Induced Kenaf Catalyst in Packed-Bed Reactor
Optimization Using Response Surface Methodology (RSM) for Biodiesel Synthesis Catalyzed by Radiation-Induced Kenaf Catalyst in Packed-Bed Reactor Open
In this study, continuous transesterification of refined palm oil by using radiation-induced kenaf denoted as anion exchange kenaf catalyst in a packed-bed reactor was developed. The application of full factorial design and response surfac…
View article: Monolith Metal-Oxide-Supported Catalysts: Sorbent for Environmental Application
Monolith Metal-Oxide-Supported Catalysts: Sorbent for Environmental Application Open
The emission of untreated environmental harmful gases such as sulfur and nitrogen oxide (SOx and NOx) emissions is considered old fashioned, since industries are compelled by governments and legislations to meet the minimum threshold befor…
View article: Filtration analysis and fouling mechanisms of PVDF membrane for POME treatment
Filtration analysis and fouling mechanisms of PVDF membrane for POME treatment Open
Palm oil mill effluent (POME) is a hazardous wastewater which contains high organic constituents and salt concentrations. The ultrafiltration (UF) process is a promising treatment design used for secondary treatment such as POME. However, …