Abass Olanrewaju Alade

• Ladoke Akintola University of Technology

Dye wastewater, especially from the textile industry, poses a significant environmental challenge due to the complex and non-biodegradable nature of synthetic dyes such as Congo red. Conventional dye removal methods are often costly and inefficient, underscoring the need for affordable, eco-friendly alternatives. This study explores the use of cell...

The high concentration of Polyaromatic hydrocarbons (PAHs) in produced water which are possibly carcinogenic both to humans and wildlife animals poses a significant threat to the environment giving rise to the need for a sustainable and economical method for PAHs elimination in produced water which is the use of Pineapple crown cellulose (PCC) as a...

The high concentration of Polyaromatic hydrocarbons (PAHs) in produced water which are possibly carcinogenic both to humans and wildlife animals poses a significant threat to the environment giving rise to the need for a sustainable and economical method for PAHs elimination in produced water which is the use of Pineapple crown cellulose (PCC) as a...

This study investigated the removal of methylene blue using chicken feather biocomposite. The chicken feather biocomposite was developed by using Simplex Lattice Design (SLD) of the Design Expert (6.0.8) as an optimization tool. The kinetic and diffusion mechanisms of the removal of methylene blue were also investigated. Fourteen experimental runs...

Open burning of solid municipal waste uncontrolledly presents an environmental menace, which exacerbate air pollution and poses considerable health risks in most developing countries. This study aims at investigating the seasonal deposition fluxes, trace metal concentrations and determination of scavenging ratios of the identified metals, resulting...

This study analyzes the elemental and oxide compositions of three selected agricultural residues-Dried Pawpaw Leaves (DPL), Kola Nut Pod (KNP), and Sweet Orange Peel (SOP)-for their potential as heterogeneous catalysts. Energy Dispersive X-ray (EDX) analysis identified calcium (25%) and potassium (29%) as the primary elements in DPL and KNP, with c...

This study analyzes the elemental and oxide compositions of three selected agricultural residues—Dried Pawpaw Leaves (DPL), Kolanut Pod (KNP), and Sweet Orange Peel (SOP)—for their potential as heterogeneous catalysts. Energy Dispersive X-ray (EDX) analysis identified calcium (25%) and potassium (29%) as the primary elements in DPL and KNP, with ca...

This study aimed to use an experimental and statistical approach to develop a cost-effective composite adsorptive biosorbent from acid, base and salt-modified biomass. Almond Shell samples were washed, milled to uniform particle sizes (425 µm) and then modified with H3PO4, NaOH, and BaCl2 separately. The three active samples were combined to form a...

Pharmaceutical wastewater (PWW) as an industrial wastewater presents a potential hazard to natural water systems. This wastewater contains organic matter, which is toxic to the various life forms of the system. PWW is one of the major health problems nowadays, not only for aquatic life but also for human beings and the environment. There are severa...

This study investigates the performance parameters of Direct Injection Spark Ignition (DISI) engines fuelled with alcohol-gasoline blends under varying engine loads and speeds, focusing on methanol, ethanol, butanol and gasoline blends. Alcohols have been recognized for their potential to improve engine performance and reduce harmful emissions due...

In this study, response surface methodology through Box-Behnken design was used to evaluate the interactive effects and optimization of retention time (8-166 days), pH (4.5-7.5), temperature (25-60 °C), and quantity of fruit waste additives (10-50 g) on the power generation performance of double-chamber microbial fuel cell (MFC) in the biotreatment...

This study converted pig dung (PD) with garlic (Allium sativum) peel extract (GPE) to adsorbents (dried pig dung (DPD), activated carbon DPD (ACDPD) and GPE impregnated DPD (EDPD) and GPE impregnated ACDPD (EACDPD)), applied in the removal of Dibenzothiophene (DBT) from diesel. The four adsorbent samples (DPD, EDPD, ACDPD and EACDPD) were used for...

Industrial processes are often multivariable systems with strong loop interactions, nonlinear, and non-minimum phase behaviors with attendant uncertainties thereby making their controlling herculean task. Students often find these concepts extremely difficult to understand when they are being taught in class. Nonetheless, students can gain true und...

Soybean (Glycine max) sample was subjected to solvent extraction with an azeotropic ternary solvent mixture (5-10% water, 5-10% ethanol, and 80-85% ethyl acetate) optimised based on D-optimal Design (DOD) under the Mixture Methodology of the Design Expert (7.0.1). The azeotropic solvent mixture developed was 9.17%, 6.67%, and 84.17% of water, ethan...

The increasing global demand for energy has fueled a search for sustainable and renewable alternatives to traditional fossil fuels. Biodiesel, produced through transesterification of triglycerides, stands out as a promising candidate. This study explores the potential use of calcined pawpaw dried leaves ash (CDPLA) as a heterogeneous catalyst for b...

The increasing presence of presistent synthetic dyes, like crystal violet (CV), in wastewater poses a significant threat to aquatic ecosystems and human health due to its genotoxicity and carcinogenicity. Biochar derived from agricultural waste offers a promising, cost-effective, and eco-friendly approach for dye removal. This study explores the po...

The research explores the viability of Kola Nut Pod (KNP) residue, derived from kola fruit in West African countries, as a catalyst for biodiesel synthesis. The abundant KNP husk, a byproduct, raises environmental concerns if discarded directly. The study aims to utilize KNP as a biocatalyst to address environmental issues and reduce biodiesel feed...

Aim: I-optimal design via the Combined Methodology of the design expert software was used to optimize the ash yield from the combustion of a biocomposite mixture of Flamboyant Pod and Groundnut Shell with additive (Kaolin) in a grate furnace. Study Design: Analysis of Variance, and Artificial Neural Network were used to predict the ash yield from t...

This study aimed to use an experimental and statistical approach to develop a cost-effective composite adsorptive biosorbent from acid, base and salt-modified biomass. Almond Shell samples were washed, milled to uniform particle sizes (425 µm) and then modified with H3PO4, NaOH, and BaCl2 separately. The three active samples were combined to form a...

Microbial Fuel Cells (MFCs) can simultaneously treat wastewater and generate bioelectricity. This study aimed to optimize operational parameters for treating wastewater from the pharmaceutical industry and harnessing bioelectricity generated from the organic components within the wastewater. The conditions for the bioelectricity generation bioproce...

Recycling polymeric waste into another useful material is considered to be the preferred way of taking care of the issues of slow degradable plastic waste, particularly in anticipation of natural contamination. In this study, the adsorptive treatment of Methylene Blue (MB) using adsorbents from chemically recycled polymeric waste was investigated....

The presence of persistent pharmaceutical products in water bodies is a significant problem that obstructs wastewater reuse. This study investigated the adsorption process for removing the recalcitrant antibiotics, including tetracycline (TC), ampicillin (AMP), and amoxicillin (AMOX) from an aqueous solution using a composite biosorbent made from a...

The use of biobased heterogeneous catalysts made from agricultural waste for producing biodiesel has gained attention for its potential to create a sustainable and low-cost process. The blending of two or more biomass residues to create more viable biobased catalysts is still in its early stages. In this study, a Biobased Composite Heterogeneous Ca...

This cover image is based on a review article titled “Exploration of Agricultural Residue Ash as a Solid Green Heterogeneous Base Catalyst for Biodiesel Production”. In transesterification reactions, heterogeneous solid catalysts are currently replacing homogeneous catalysts because of their ability to overcome hurdles associated with homogeneous c...

There is a large volume of waste cooking oil (WCO) in the world, which has made waste management extremely difficult. The main purpose of the large-scale organized collection of WCO is the synthesis of biodiesel. Although alternative applications are equally important and necessitate attention, the majority of studies focus primarily on the synthes...

The cost and difficulty in the preparation of synthetic heterogeneous base catalysts is the main barrier to their use. Today, the majority of these catalysts are derived from biomass resources. This study aimed at developing and characterizing these catalysts from three biogenic residues for biodiesel production without catalyst support. The EDS in...

Using readily available biomass, it is possible to produce fatty acid methyl esters (FAME) at a low cost. This study focused on the transesterification process of waste frying vegetable oil to generate FAME (biodiesel) using a cost‐effective heterogeneous nano‐catalyst synthesized from waste cow teeth (CT). The cow teeth nano‐catalyst (CTNC) was sy...

Biodiesel is an economical and nonpolluting green fuel produced from the transesterification of oil and alcohol in the presence of a catalyst. Transesterification of vegetable oils with conventional (homogeneous) catalysts for biodiesel production is considered to have a promising future but they are nonrenewable and hazardous. The major setback is...

High heating value (HHV) of biomass is important for the design and operation of biomass based energy conversion processes. Experimental determination of this property is always time consuming and expensive. This paper compares existing empirical correlations based on proximate and ultimate analysis of biomass for the determination of the HHV. The...

Under batch experiment conditions, this work seeks to successfully remove Diclofenac-Na (DCF-Na) from an aqueous solution utilizing a composite sorbent made of Bentonite, Kaolinite clay, and Worm casting (BKW). This study investigated the structural modification of the H3PO4 Modified Clay by X-ray fluorescence and the effect of selected adsorption...

The selection of suitable mass transfer models that fit the adsorption of a mixture of antibiotics in aqueous solution onto activated carbon derived from Delonix Regia Pods (DRPs) was examined in this study. The ripe DRPs were cleaned, activated with KOH and then carbonised at 350 °C. The surface chemistry of the raw and the modified DRPs were char...

Cellulose from Sunflower Xylem “Tithonia diversifolia xylem” has been successfully synthesized. Sunflower is an abundant agricultural waste and has a high cellulose content. Bioconversion of Sunflower Xylem into cellulose begins with the stages of delignification and bleaching. The resulting cellulose was characterized using Scanning Electron Micro...

Under batch experiment conditions, this work seeks to successfully remove Diclofenac-Na (DCF-Na) from an aqueous solution utilizing a composite sorbent made of Bentonite, Kaolinite clay, and Worm casting (BKW). This study investigated the structural modification of the H3PO4 Modified Clay by X-ray fluorescence and the effect of selected adsorption...

Diclofenac-Na (DCF-Na) is an important analgesic which is frequently used to suppress inflammation and reduce pain. However, recent toxicological studies show that the presence of DCF-Na in water bodies can affect human life, plant and animal adversely (Memmert et al., 2013). Adsorption is one of the most widely used techniques for the removal of t...

Shea butter oil (SBO) is underutilized in the biodiesel production industry in Nigeria because of its high free fatty acid (FFA) which reduces its biodiesel yield. This research aimed at optimizing shea butter oil biodiesel (SBOB) production using a biomass-derived heterogeneous catalyst. Crude SBO was purified and then esterified with H2SO4. An ac...

The over-reliance on fossil fuels as a primary source of energy is partly responsible for the increase in carbon dioxide (CO2), depletion of the ozone layer, and general environmental pollution. In this study, torrefaction of Albizia zygia wood-calcium hydrogen phosphate (CaHPO4) catalyst blends was carried out in a tubular furnace to examine the i...

Food-related waste is produced in large quantities every year throughout the world. Cocoa industrial wastes, in particular, constitute an important source of useable biomass for the development of fresh items like food, farm animal feed, beauty products, and chemical substances, as well as the production of biofuels. Cocoa pod shells, bean shells,...

Methylene Blue (MB) is the most famous cationic dye. The removal of methylene blue (MB) dye from industrial waste via adsorption pathway has been widely investigated, promising high MB removal efficiency. In this work, batch adsorption experiment was carried out to remove MB from simulated water using modified Styrofoam, Intruded Expanded Polystyre...

Batch adsorption process factors [contact time (20–150 min), adsorbent dosage (0.5–1.5 g), adsorbate concentration (5–30 mg l−1), and agitation rate (100–250 rpm)] were optimised based on D-optimal Design under the Response Surface Methodology (RSM) of the Design-Expert Software (7.6.8) for the removal of naphthalene from aqueous solution using a...

The ash yield from the combustion of a mixture of Africa star apple and tropical almond seeds shells (biocomposite biomass) with ammonium dihydrogen phosphate as an additive in a furnace was optimized using I-Optimal Design under the Combined Methodology of the Design Expert Software. The data obtained were analysed statistically using Analysis of...

The quantity of ash yield and carbon monoxide (CO) emitted during co-combustion of empty fruit bunch (EFB), palm kernel shells (PKS) and kaolin in a grate furnace depend on the fuels mixing ratio, the combustion temperature and duration. These factors can be tuned to minimize ash deposition and CO emission which is partly responsible for the greenh...

This study investigated the effect of different pretreatment methods on sugar liberation from Rice bran (RB) and Deoiled Rice bran (DRB). An amount of 100 g of RB or DRB were soaked in 1% (w/v) trichloroacetic acid (99.0 % stock concentration) separately and each mixture was made up to 1L with distilled water to generate the Acid treated RB hydroly...

Biosorption of bromothymol blue from wastewater using biocomposite developed from Gliricidia sepium (A) and Acacia pods (B) was studied. The biocomposite were developed based on the Mixture Methodology of the to Design Expert software (11.0.4), where the mixed ratio was varied from 5 to 95 percentage composition and the effective mixture was evalua...

Drying of bambara beans was studied at 40oC at every 30 minutes in a Laboratory oven. Effective moisture diffusivity ranges between 5.886 x 10-10 m2/s – 4.354 x 10-10 m2/s respectively. The statistical criteria used in evaluation of the model were maximum coefficient of determination R2 and minimum root mean square error [RMSE]. Determination for g...

The dyes in the effluents discharged into water bodies, aimlessly, are displeasing aesthetically and pose hazards to aquatic communities. The use of adsorption process has been adopted for effective treatment of wastewater containing dyes. The removal of Bromophenol blue (BPB), Bromocresol green (BCG), Bromocresol purple (BCP), and Bromothymol blue...

Midilli model was used to estimate the moisture ratio of four varieties of Sword beans. The experiment was carried out using distilled water at temperature of 530C for 100 minutes. The standard model of water absorption was fitted into the experimental data. Coefficient of determination [R2] and root mean square error were used to evaluate the mode...

This study investigated the viability of using waste groundnut shells (GSs) to produce efficient biosorbent capable of removing nitrophenol from aqueous solution. Waste GSs were washed thoroughly, dried, reduced to 2 mm particle size, and activated with ZnCl2. The surface and physical properties (moisture and ash content) of the activated GSs (AGSB...

Activated carbon was optimally produced from Moringa oleifera pod (AMOP), with the aid of microwave, based on the D-Optimal Design under the Response Surface Methodology of the Design Expert software (6.0.8). Process factors selected were time (20–60 mins), temperature (200–450 °C), and impregnation ratio (IMR) (1:1-1:5), while the responses select...

This study reports the removal of bromothymol blue from wastewater onto Gliricidia sepium (G. sepium) and Acacia pod (A. pods) composite. The developed biocomposite mixed ratio was varied from 5 to 95 percentage composition and the effective mixture was evaluated based on methylene blue number (MBN) test. Adsorption Capacity (QE) and Removal Effici...

Matured flamboyant pods (FBP) activated with ZnCl2 were used for batch adsorption of Bromophenol blue (BPB) dye under the effects of concentration (10-200 ppm), contact time (20-300 min), biosorbent dosage (20-120 mg) and particle size (300-850 µm). The data obtained were fitted to Langmuir and Freundlich isotherm models as well as pseudo-first-ord...

This study investigated green synthesis of silver-gold nanoparticle using biocomposite of extracts obtained from the peels of banana species (Musa paradisiaca, Musa acuminata, and Musa balbisiana). The peels were air-dried under hygienic conditions before being ground to powder. Aqueous extraction was carried out by adding 1 g of the ground peel to...

Removal of phenol from simulated wastewater was investigated with silver–gold-nanoparticle-modified mango seed shell-activated carbon under batch experiment. The surface properties of the activated carbons were characterized using Fourier transform infrared spectroscopy (FTIR). Adsorption experiment was carried out at ambient temperature to study t...

ABSTRACT Diclofenac-Na (DCF-Na) works as antiuricosurics and analgesic which is frequently used to suppress inflammation and to relieve pain in diseased conditions, such as arthritis or acute injury. Toxicological studies have demonstrated that the presence of DCF-Na in water bodies, even at trace concentrations, can adversely affect human life, flo...

Methylene Blue (MB) is an organic dye that has wide applications in the textile industries. Its presence in water stream is dangerous to aquatic animal and man. Its removal through various methods has been explored but adsorption method has attracted much attention. Thus, there is a growing effort to get the best adsorbent that can remove MB effect...

Steam pressure (P) and toasting time (T) were considered under the Central Composite Design (CCD) for the optimization of oil and cake yield, as well as trypsin inhibitor and phosphorus content removal from soybean during the extraction process in the expeller machine. The soy oil was characterized for its acid, iodine, and peroxide values. The obt...

Nanoparticles have great potential to be produced from renewable resources such as agricultural wastes and residues. Therefore, this study was designed to biosynthesize nanoparticles involving a mixture of extracts obtained from Yam, Potato, and Cassava peels. The Yam peel, Potato peel, and Cassava peel were hygienically processed, ground to powder...

The total particulate matter (PM) deposited within 17 selected industrial areas in Lagos state during the dry season (December 2015 to January 2016) was studied. Deposition gauges measuring 0.2 meters (m) in diameter by 0.15 m in depth were placed at the sampling locations for a period of one month to collect the total deposited PM. The PM was then...

The presence of methylene blue (MB) in wastewater is a major concern in the environment due to its low biodegradability and harmful effect on man. The adsorption of MB from aqueous solution onto activated carbon (AC) prepared from mango seed shells sourced locally in Ogbomoso Township was investigated in this study. The AC was prepared from mango s...

This study was carried out to optimize the batch adsorption of a polycyclic aromatic dye from a simulated textile wastewater onto Delonix regia-derived activated carbon (DRP-AC) under the influence of contact time, agitation rate, and initial dye concentration as process variables. Congo red (CR) dye was used as the model pollutant. Response Surfac...

This study investigated chromium (VI) removal from simulated water using H3PO4 modified Bauhinia rufescens pod (ACBRP). Box-Behnken Design was used to optimize pH (2–10), time (30–120 min), agitation (120–200 rpm), and temperature (25–40°C) for the adsorption process. Highest adsorption capacity (AC) and removal efficiency (RE) obtained were 9.762...

The objective of this work is to optimize the production of a low-cost activated carbon from Delonix regia (flamboyant) pods through chemical activation with ethanoic acid and carbonization (pyrolysis) process. The effect of production process variables; carbonization temperature, carbonization time and impregnation ratio on the activated carbon yi...

Grate firing is one of the main competing technologies in biomass combustion for steam and electricity generation. Ash generated in the furnace during combustion process would greatly reduce the boiler thermal performance and may lead to unscheduled shutdown. The focus of this study is to optimize the combustion characteristics of the mixture of pa...

Hydroxyapatite (HAP) was prepared from catfish bones at optimized conditions by employing Central Composite Design (CCD) under Response Surface Methodology (RSM). The temperature of preparation ranges between 300 and 1000 °C and time was varied between 1 and 2 h. The software gave thirteen (13) runs experiment within the conditions. 10 g of treated...

This study investigates the carbonization of flamboyant pod bark (FPB) for the purpose of production of effective activated carbon from the agricultural residue. Central Composite Design (CCD) under the Response Surface Methodology was employed to combine the selected process parameters [Temperature (300 - 600 0C) and Time (30 - 65 mins)] for the c...

Open burning of scrap (bicycle, motorcycle, car and truck) tyres (OBST) was simulated in the laboratory to investigate their impact on the ambient air quality. The tyre samples were burnt in combustion chamber, and gaseous pollutants (CO, NO2 and SO2) emitted were quantified, while concentrations and elemental compositions of emitted total suspende...

Simplex Centroid Design (SCD) was employed to optimise the mixing of petroleum ether, n-hexane, methanol and ethanol for the extraction of oil (PLO) from Pitanga (Eugenia Uniflora L) leaves, via Soxhlet extraction. Highest yield (54%) of PLO was obtained with 100% ethanol and lowest yield (16%) from the mixture of methanol (33.3 %)/hexane (33.3 %)/...

The application of agricultural waste for the production of activated carbon for the adsorption of pollutants from wastewater has become attractive in recent time. Activated carbon was produced from Lantana camara stem in this study. The Lantana camara stem were cut into smaller sizes, washed and sundried for 6 days. Thereafter, it was carbonized a...

This study aimed at optimizing the mixture of palm kernel shell (PKS) and selected additives (Al 2 O 3 , MgO, and CaO), on the yield of ash after combustion using D-optimal under the Mixture Methodology of the Design Expert (6.0.8). The samples were oven-dried at 105°C, then placed in furnace at 575°C and ashed to a constant weight based on the exp...

The challenge to find and develop alternative sources of energy so that our decreasing reserves of crude oil and other fossil fuels may be conserved is of concern. However, this energy source must not interfere nor compete with human means of survival. The brewery industries generate a large amount of waste with a spent grain (SG) being the major o...

Activated carbons (MBK400 and MBK600), produced from milk bush kernel shells, were carbonized at 400 and 600°C, respectively, activated with H3PO4, and subsequently, employed to remove heavy metals (cadmium, lead, nickel, zinc, iron, and copper) in dairy industrial wastewater (DIWW). Effects of doses (1.0–3.0 g/L) and contact time (5–25 min) at con...

This study investigated the effects of biodegradation by the mixed culture of fungi (Pithomyces sacchari and Pestalotiopsis maculans) on selected physical properties of palm oil mill effluent (POME). Mixed culture innoculum (4% v/v) was added to autoclaved and raw POME samples, which were subjected to biodegradation at 120rpm and 35°C for six days....

This paper provides overview of the state of municipal solid waste management (MSWM) by local authorities in Nigeria. Different areas through which the challenges can be tackled in order to improve municipal solid waste (MSW) services are discussed. With increasing global change pressures (population explosion, haphazard rapid urbanization, climate...

This study investigated the adsorption of Methylene Blue (MB) present in wastewater onto the ac- tivated carbon produce from Lantana camara stem. The agricultural material (Lantana camara stem) was carbonized at 300˚C for 2 h, ground and steam-activated. The Steam-Activated Lantana camara (SALC) stem carbon was characterized using Scanning Electron...

A novel Hydroxyapatite (HAp) nanopowder prepared from a biogenic waste, the shell of a gastropod (SS), by hydrothermal method was used as adsorbents (SSHAP nanopowder) for adsorption of manganese ion in wastewater. The SSHAP produced was characterized using FTIR and SEM. Also, the surface area of the nanopowder was determined using BET. The effects...

In crude oil production from brown fields or heavy oil, there is production of water in oil emulsions which can either be controlled or avoided. This emulsion resulted in an increase in viscosity which can seriously affect the production of oil from sand phase up to flow line. Failure to separate the oil and water mixture efficiently and effectivel...

Palm oil mill effluent (POME) constitutes 60% of the wastes generated in typical palm oil mill and its environmental impact has been identified to be harmful to aquatic lives. This project examined the potential of degrading POME with microorganisms that are indigenous to POME. Thus, two microorganisms were isolated from POME using serial dilution...