Cellulosic fibers were extracted from bolo (Gigantochloa bolo) culm and running bamboo (Phyllostachys aurea) branches grown in Baguio City, Philippines using separate pre-treatment and processing reagents. Food grade reagents such as acetic acid and hydrogen peroxide were used to further process the fibers after NaHCO3 pre-treatment and non-food grade reagents such as hydrochloric acid were...
In this research, the effect of surface modifiers derived from waste on the ammonia adsorption of physically activated bagasse fly ash was investigated. BFA was mixed with 15% w/w of bamboo hydrochar or red mud followed by steam activation. BFA was combined with 15% w/w of either bamboo hydrochar or red mud, followed by steam activation. The research analyzed the adsorption capacity and...
The integration of Internet of Things (IoT) technology in smart buildings presents significant opportunities for enhancing energy efficiency. This pa-per explores advanced IoT-driven innovations, emphasizing next-generation energy management systems, renewable energy integration, and predictive analytics. Taking advantage of the Internet of Things, machine learning al-gorithms, blockchain...
In response to the Philippines’ growing plastic waste problem, the Depart-ment of Science and Technology-Industrial Technology Development Insti-tute (DOST-ITDI) developed a 1-hp Electric Plastic Densifier (EPD) that employs mechanical recycling through extrusion to process low-value plas-tic wastes and produce densified plastic strings. Due to its novelty, there is a need to study its...
Recent advancements in computing power and the availability of online resources have fueled the increasing popularity of machine learning in modeling wastewater treatment plants. This study capitalizes on this trend by developing neural networks and ensemble models for predicting influent BOD using real data from a Sequential Batch Reactor (SBR) plant in the Philippines. The study employed a...
This study investigates the characteristics of microwave-assisted pyrolysis applied to rice husk (RH), teak wood powder (TW), and their blends, with the aim of assessing the impacts of varying raw material composition ratios and microwave power settings on the following parameters: (1) the temperature profiles during pyrolysis, (2) the yield of products generated, and (3) the calorific value...
The textile industry in Indonesia plays an important role in economic development. This research focuses on applying circular economy principles in Indonesia's textile industry to address challenges such as textile waste management and sustainability. The Indonesian Government's initiatives to promote a circular economy, as outlined in various regulations and development plans, aim to enhance...
The objective of this study is to examine the thermal co-pyrolysis process of waste plastics and used engine oil as the effect of plastic material, tempera-ture, and reactor diameter. HDPE, PP, and PS have been used as waste plas-tic samples. Co-pyrolysis method was used in this experimental work, by combining the two materials into one reactor with a total weight of 400 gr with a ratio of...
Among all the known conventional photocatalysts, TiO2 has most popularly been used in many industrial applications for the remediation of multiple environmental pollutants via an advanced oxidation process. However, its wide band gap hinders its application as it poorly absorbs visible light. Various strategies have been made to reduce its band gap for utilizing the solar spectrum absorbance...
The world’s first patented dyeing machine was developed to treat wastewater liquor coming from the reactive dyeing process. Controlled quantities of ozone gas were injected in the machine during the washing process to decolourize dyes present in waster as well as on fabric surface. Several different dyeings were carried out in the machine using variety of reactive dyes. At the completion of...
Mohamad AlNajem1 and Omer Gibreel 2
1 Business Administration Department, College of Business Administration
Gulf University for Science & Technology
Kuwait
alnajem.m@gust.edu.kw
2 Accounting & Management Information Systems Department
Gulf University for Science & Technology
Kuwait
gibreel.o@gust.edu.kw
Abstract. This study aims to evaluate graduate and undergraduate students'...
Global warming is a main issue for every country that affects the increasing of Earth’s temperature, caused by greenhouse gas emissions into the atmosphere, especially methane (CH4) and carbon dioxide (CO2). Therefore, the utilization of CO2 and CH4 gases is an interesting approach. They can be used as reactant gases in the dry reforming reaction, with the resulting products further used as...
High temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) operate at 120-200°C, avoiding water flooding, tolerating CO, and improving reaction kinetics. The gas diffusion layer (GDL), which consist of the microporous layer (MPL) and carbon paper/cloth, is crucial for mass transport, heat transfer, and electricity conduction. The presence of the MPL can enhance electrochemical...
This study explores the transformative effects of biochar and hydrochar amendments on the physiochemical properties of unsuitable soils and the germination rate of Khon Kean 3 sugarcane bud seeds under harsh conditions of unsustainable soils in sugarcane cultivation. Biochar and hydrochar, derived from bagasse carbonization and hydrothermal carbonization, were applied to unsuitable soils,...
The disposal of spent coffee grounds (SCG), a biomass waste produced from coffee brewing, poses a significant environmental challenge due to its high organic content and large quantities. To address this issue, a valorization approach to convert SCG into bio-oil through pyrolysis and to extract oleic acid, the predominant fatty acid in SCG, from the pyrolyzed bio-oil has been explored. A...
Nitrite salts, commonly used as food preservatives, inhibit bacterial growth and are present in water from runoff, industrial discharges, and decay. Elevated nitrite levels in the human body pose health risks, including methemoglobinemia, gastric, and esophageal cancers. Moreover, high nitrite levels in water bodies can adversely impact ecosystems and aquatic life. This research explored the...
The aim of this study is to improve the lifting process for 25kilogram boxes vertically stacked on pallets, with consideration for the inclusion of female workers as per labor regulations. Utilizing the National Institute for Occupational Safety and Health (NIOSH) Composite Lifting Index (CLI) through Digital Human Modeling (DHM), the risk of musculoskeletal dis-orders (MSDs) from a single...
Agricultural waste is rapidly increasing as the agricultural sector expands, presenting significant environmental challenges if not managed properly. While incineration is a common method for agricultural waste treatment, the high moisture content, low heating value, and high ash content hinder its usage in furnaces. Additionally, although agricultural waste is widely utilized as solid...
An aluminum ion battery (AIB) is a multivalent ion battery that used alu-minum as the anode, layered compounds as the cathode, and non-aqueous solvents as the electrolyte. Because of its high safety and ubiquity, this type of battery is expected as an alternative to lithium-ion battery that we use today. Furthermore, compared to lithium-ion batteries, it has approxi-mately four times the...
This paper presented the investigation into the production of H2 and CO through continuous feed CO2/O2 gasification utilizing coconut shell char (CSC) as raw material, the coal was pulverized into powder for the ease of feeding and decomposition. The nitrogen used to regulate the oxygen percentage in the system and the mixture of CO2/O2 gas served as gasification medium, the mixed gas fed...
Biochar has drawn intensive attention, particularly in environmental remediation, such as the removal of various pollutants in water and air. However, dearth of research on the removal efficiency of VOCs on biochar. Honeycomb-like tubular biochars (HT-Bs) were synthesized from pre-treated corn stalks (CS) for the removal of acetone gas. The honeycomb-like tubular structure exhibited great...
Rural building clusters hold significant prospects for solar energy applications. However, the unclear impact of building shading on solar energy potential impedes their effective utilization. To address this challenge, we conducted case studies in three villages with diverse topographies in Nanjing. Utilizing a 12.5 m resolution digital elevation model (DEM), 3D building models, and hourly...
In the Philippines, solid waste from households contributes up to 56.7% of the total waste produced in the country, and more than 50% of the wastes are biodegradables. Due to limited opportunities for waste diversion, most of the recovered biodegradable waste from these households still ends up in landfills. Community-based recycling technologies must be assessed and promoted to lessen the...
The rapid population growth rate has increased the demand across various sectors. The high demand of fossil fuels can lead to an increasing of carbon emissions released into the atmosphere which is affected to the environmental issues such as global warming, air-pollution and climate change problems. This high demand, particularly in the building construction sector which relating to almost...
The greenhouse effect has been a critical issue for the sustainable develop- ment of mankind, to address this issue, the concept of carbon taxes has been in- troduced. The introduction of carbon taxes forced the manufacturing industry to transform into green manufacturing to reduce carbon emissions and most im- portantly reduce cost. In this study, the carbon emission generated by the ma-...
Capacitive deionization (CDI) is a promising technology for electro-chemical deionization of ionic species that is based on the electrical po-tential applied to a pair of electrodes for removing charged ions from an aqueous solution. The electrochemical performance of CDI is highly dependent on the electrode materials used, and carbon-based nanocom-posites have received immense attention...
Currently, Pt nanoparticles-supported carbon materials serve as cathode electrocatalysts for the oxygen reduction reaction (ORR) in commercial hydrogen fuel cells. However, Pt has a high cost, scarcity, and low durability. To address these challenges, nitrogen-doped carbons (NC) have been explored as potential ORR electrocatalysts due to their cost-effectiveness and high durability. Recently,...
Research on supercapacitors has primarily focused on electrode materials, often overlooking the significance of separators. This research explores the use of cellulose nanofibrils (CNFs) derived from rice straw, an abundant biomass resource, processed through TEMPO-mediated oxidation and me-chanical disintegration, as membrane separators in supercapacitors. Initial-ly, an optimal CNF membrane...
To address the climate change and energy crisis caused by traditional fossil fuels, and to promote the achievement of "carbon neutrality" and "carbon peak" goals, the development and application of biomass energy has garnered widespread attention. Among the challenges faced by biomass energy, the alkali and alkaline earth metals (AAEMs) present in biomass ash can lead to boiler corrosion and...
The expanding commercialization of the aviation industry has led to a rising demand for aviation fuel. This increasing demand for fossil fuels is concerning due to the dwindling availability of crude oil and escalating environmental impacts. As a response, alternative fuels are being developed, particularly environmentally sustainable and renewable biofuels. One promising avenue is the...
Congo red (CR) and methylene blue (MB) are considered to be two traditional synthetic dyes of organic provenance. The current study examines the dye removal capacity of the commingled food waste biochar (CFWB) prepared through Microwave-assisted Pyrolysis (MAP). The pristine CFWB has lower efficiency for CR (71.7 %) and MB removal (74.5 %) with initial concentration of 10 mg/L after 150 min,...
With the rising awareness of green manufacturing, the importance of in- volving green energy into the manufacturing process has become a crucial is- sue. However, sustainable energy such as solar power, requires a reliable pre- dicting model for maximizing the power gathered from the solar power system. This research presented a novel machine learning method for predicting the solar radiation...
Gold nanoparticles incorporated into polyvinyl alcohol (AuNPs/PVA) nanofibers were successfully prepared using the electrospinning technique. Two key factors for PVA nanofiber preparation were deter-mined: PVA concentration and tip-to-collector distance. In this study, PVA nanofibers were prepared with various PVA concentrations (i.e., 8, 10, 12, 14, 16, and 18 %) and tip-to-collector distance...
The increasing environmental pollution problem has been attributed to fossil fuels, prompting a high demand for effective replacements. Proton exchange membrane fuel cells (PEMFCs) are a crucial technology for producing electric power in many applications that utilize hydrogen to generate high-efficiency and low-emission electricity. To improve the utilization of supplied gases, dead-end...
Thermochemical conversion of carbonaceous wastes into valuable carbon nanomaterials via catalytic pyrolysis is one of the promising measures to solve the waste pollution crisis. Additionally, the as-produced carbon nanomaterials of high value may incentivize waste collection and provide economic benefits. In this study, a sustainable one-pot synthesis protocol was developed to produce carbon...
Macadamia shell waste from the production of snacks and desserts in Thailand was converted into porous carbon materials through chemical activation with po-tassium hydroxide (KOH) to add value to the residues. Carbonized macadamia shells were mixed with KOH at the ratios of 1:1, 1:2, and 1:3, and pyrolyzed at 800 °C under Ar flow. Scanning electron microscopy images revealed an in-creased...
Higher performance batteries are required for a sustainable society. Therefore, the development of lithium-air batteries (LAB) with high energy density is expected. As important chemical reactions in LAB, oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) occur during charge and discharge, respectively. Li+ reacts with O2 to produce Li2O2 during discharge while decomposition...
The textile, leather, paper, food, and cosmetics industries are major sources of dye pollution, negatively impacting water quality, ecosystems, and posing risks to human and aquatic health. Effective wastewater management is essential and requires innovative solutions. This research introduces an eco-friendly advanced material engineering approach by incorporating an effective adsorbent (SiO2)...
Nowadays, activated carbons (ACs) derived from biomass waste are prom-ising as materials for various applications, particularly supercapacitors, due to their high surface area and porosity, low cost, natural abundance, power delivery performance, and electrochemical stability. In this work, ACs were derived from waste corn cob through carbonization at 600 °C followed by chemical activation...
Coconut coir dust (CCD) is a byproduct generated during the separation process of coconut coir fiber from coconut husk. Due to its high carbon content and relatively low ash content, utilizing CCD as a precursor for carbon production is an attractive option. In this work, activated carbons (ACs) were synthesized from CCD through carbonization at 500, 600, and 700 ºC, followed by steam...
Abstract. Carbon emissions offsetting topic has gained popularity in recent years as a way of reducing the impact of carbon emissions on the environment we live in. The purpose of this study is to highlight the ethical implications of business carbon emissions offsetting projects. A comprehensive literature review has been conducted to analyze the literature and highlight the arguments that...
The aim of the research presented the removal of halogen compound on pyrolysis oil from e-waste adsorptive pyrolysis. Fly ash from coal-fired (LNFA) and rice-husk-fired (RHFA) power plants were considered an al-ternative adsorbent. Adsorptive pyrolysis was performed in term lab scale and pilot scale. Condition of pilot scale was optimized by lab scale-pyrolysis experiment. LNFA performed well...
Reactive dyes like methylene blue (MB) from textile industries significantly affect the environment due to their high carcinogenic and mutagenic potential. The pre-sent study aims at visible light induced photocatalytic degradation of MB using magnetically recyclable biochar (MBC) supported bismuth oxybromide (BiOBr) nanocomposite in aqueous medium. Magnetization of biochar was done by...
