Imokhai Tenebe

University of Chicago | UC · Chicago Booth School of Business

The integrated solar and hydraulic jump-enhanced waste stabilization pond (ISHJEWSP) has been proposed as a solution to enhance performance of the conventional WSP. Despite the better performance of the ISHJEWSP, there is seemingly no previous study that has deployed machine learning (ML) methods in modelling the ISHJEWSP. This study is aimed at de...

This study was conducted in Ekpoma, a town dependent on rainwater and river water from nearby areas because of a lack of groundwater sources, and the physicochemical and bacteriological (heterotrophic plate count [HPC], total coliform count [TCC], and fecal coliform count [FCC]) properties of 123 stored river water samples grouped into five collect...

This study is motivated by the need to understand and proffer sustainable circular economy solutions to the persistent challenges associated with plastic waste management in Nigeria. Despite the emerging awareness and increased number of studies conducted on plastic and plastic products in Nigeria, the challenges and opportunities associated with t...

This study investigates the background dose rates and radiological risk exposure to Iju community in Ado-Odo Ota. Using a hand-held calibrated gamma detector (RS-125 Gamma-Spec), the study area’s outdoor gamma dose rates and radionuclide activity concentrations of 40K, 238-U, and 32-Th were measured in situ. The results showed differing activities...

Study Objectives: It is crucial to understand the patterns of emergency medical services (EMS) arrivals to optimize resource allocation and throughput in emergency departments (EDs). The purpose of this study was to analyze and predict daily ambulance arrivals to the ED, using data-driven insights to inform resource planning. Methods: We conducted...

Sediment quality and the integrity of coastal aquatic ecosystems are deteriorating, particularly in regions with unregulated discharges of chemical pollutants into the environment. Although organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) have been banned in recent decades for their adverse effects on the environment and human...

Acute coronary syndrome (ACS) is a leading cause of mortality and morbidity. Predicting the associated risks of patients with chest pain using electronic health record data can help identify those needing more tailored care. This study proposes the development of a reliable prediction framework to serve as a diagnostic support tool for preventing m...

Land Use and Land Cover (LULC) properties give vital information about pollution signatures in rivers, and they help develop best management practices (BMPs) for effective water resource management. This work employs multivariate statistical methods, receptor modeling, connectivity analysis, and univariate trend analysis to investigate pollution so...

The novel coronavirus caused a lifestyle shift, and the acceptance of offsite financial transactions is still a case for financial technology (fintech). Mobile financial transactions continue to be at an all-time low, and financial institutions are developing approaches for financial digitalization acceptability. The present study attempts to under...

The novel coronavirus caused a lifestyle shift, and the acceptance of offsite financial transactions is still a case for financial technology (fintech). Mobile financial transactions continue to be at an all-time low, and financial institutions are developing approaches for financial digitalization acceptability. The present study attempts to under...

Understanding the specific timings of ambulance arrivals during different shifts presents unique opportunities foremergency department (ED) throughput optimization. This research aims to determine whether there are significantdifferences in ambulance arrivals across various periods (i.e., morning, afternoon, evening, and night) and to usemachine le...

Healthcare technology is a critical factor for effective management of patient care, resulting in enhanced effectiveness when adopted by healthcare professionals. However, the lack of acceptance can undermine its inherent benefits. This study aims to investigate the factors that influence the adoption of technology among healthcare professionals, u...

Sachet water (SW) is a major source of drinking in most Nigerian homes, thus making it a possible conveyance medium for health risks due to contamination if persist rather than for replenishment of the body. This study collected SW from three busy neighborhoods in SouthWest Nigeria and investigated for the presence of indicator bacteria (Escherichi...

The study aims to determine the spatial variability of physico-chemical characteristics and heavy metals constituent of groundwater within Calabar Metropolis, as well as the potential human health risk of adults and children to heavy metals through ingestion and dermal pathways. Fifty groundwater samples were collected from different locations and...

With looming global water-related issues, the monitoring of water quality for household and industrial consumption has become more pertinent. Rivers in nearby towns serve as primary water sources for Ekpoma town. 123 samples of stored river water were collected from 41 sampling locations and physical properties – pH, electrical conductivity (EC), s...

Sachet water (SW) is a major source of drinking water in most Nigerian homes, thus making it a possible conveyance medium for health risks due to contamination rather than for replenishment of the body. This study collected SW from three busy neighborhoods and investigated for the presence of indicator bacteria – Escherichia coli (E. coli), Total C...

Healthcare waste management has become an important aspect of medical care delivery globally. This is simply because of its hazardous and infectious components that have greater potential for adverse health and environmental impacts. As such, certain guidelines and procedures have been developed by international aid agencies and conventions to guid...

In the United States, public transit ridership in 2020 declined by 79% compared to 2019 levels. With lockdowns implemented during the early days of the pandemic, direct human-to-human interactions migrated to virtual platforms (e.g., Facebook, Twitter, and Reddit). Social media platforms have aided researchers in answering numerous questions about...

Study Objectives: Understanding the arrival patterns of emergency department (ED) patients is fundamental for allocating limited healthcare resources, and climate factors are known to increase ED visits. The objective of this study was to develop a forecasting model based on ED patients’ arrival, air pollutants, and climate factors to facilitate da...

This study examines the case of Ekpoma community, Edo State, Nigeria, where roof-harvested rainwater is the primary source of water for drinking and domestic purposes. Eight potentially toxic elements (PTEs), namely aluminum, chromium, copper, iron, manganese, nickel, lead, and zinc, were detected in rainwater samples, collected and analyzed from 5...

Traditional-based security models are a threat to information security; they have been regarded as weak and ineffective to meet the dynamics of information system trust. An emerging framework, Zero Trust Architecture (ZTA) seeks to close the trust gap in information security through enforcing policies based on identity and continuous authentication...

Microplastics (MPs) are emerging pollutants of global concern due to their pervasiveness, sorptive capacity for organic and inorganic pollutants, and direct and indirect toxicity to organisms and ecosystems. This study aimed to assess the concentration and the statistical difference in the concentration of microplastic-sorbed organic pollutants fro...

The COVID-19 pandemic has heightened the existing concern about the uncertainty surrounding patient arrival and the overutilization of resources in emergency departments (EDs). The prediction of variations in patient arrivals is vital for managing limited healthcare resources and facilitating data-driven resource planning. The objective of this stu...

The pervasive existence of microplastics (MPs) and toxic metals is raising environmental and health concerns. Plastics are essentially a complex mixture of chemicals, but exposure to the aquatic environment increases their complexity through contaminant desorption/sorption. The aim of this study was to establish baseline data on the elemental occur...

This study investigated the bacteriological quality of rainwater (RW) harvested from storage facilities located in Ekpoma, a rural community in South-South Nigeria, and the possible health implications resulting from its intermittent or incessant consumption. In this study, 162 samples were collected from different storage devices located in Idumeg...

In the current pandemic (COVID-19) that the world faces, there is a dire need to develop a more resilient municipal solid waste system to cushion its effect. To achieve that, a robust knowledge of the current state and future directions required through research is pertinent as municipal solid waste management practices vary from regions all over....

The upper Cross River basin (UCRB) fits a true description of a data scarce watershed in respect of climatic data. This paper seeks to determine the best-fit probability density function (PDF) of annual maximum rainfall for the UCRB using the Climate Forecast System Reanalysis (CFSR) precipitation data. Also, to evaluate the performance of the Inte...

This study evaluated the antibacterial efficacy of some disinfectants widely used in Nigeria in the elimination of common bacteria found in bathing water. Four (4) skin disinfectants Ivy, Dettol, Izal, and Septol, were added to sterile distilled water containing Escherichia coli (E. coli), Klebsiella spp. and Bacillus spp. which were isolated from...

River sediments contain environmental fingerprints that provide useful ecological information. However, the geochemistry of River Atuwara sediments has received less attention over the years. One hundred and twenty-six sediments from 21 locations were collected over a two-season period from River Atuwara, and a detailed investigation of the land us...

The on-site collection of data is not only time consuming, but expensive and perhaps near impossible in restive communities within the upper Cross River basin (UCRB). Therefore, the importance of this data cannot be overemphasized. This article presents a Digital Elevation Model (DEM), land use and land cover (LULC) map, soil map, geology map and c...

Cross River, which originates from Cameroon, flows through several communities in Nigeria. The population upsurge and settlements near the river channel, however, portends the possibility of natural hazards such as floods. Floods within the upper Cross River basin (UCRB) have resulted in the loss of lives and property. The importance of flood studi...

Increased industrial, commercial and transport activities have constantly introduced air pollutants such as heavy metals in the atmosphere. Roadside dust samples were collected from 10 locations along Ota-Benin road, analysed for Cr, Cd, Co, Ni, Pb, Fe, Mn, Cu, As and Zn, and the ecological risk was evaluated for the heavy metals’ concentration in...

The study investigated the concentration of potentially toxic heavy metals (PTHM) in groundwater sources (hand-dug wells and boreholes), spatial distribution, source apportionment, and health risk impact on local inhabitants in Ogun state. One hundred and eight water samples from 36 locations were analysed for Cr, Ni, Pb, Fe, Mn, Mg, Ca and Al. Mea...

Over twenty thousand persons rely on water from Atuwara River for drinking and other domestic purposes, hence the need to ascertain the human health risk inherent in such practice. Seventy-two water samples were collected from River Atuwara during the dry and wet seasons of 2018, and the concentration of heavy metals (Pb, As, Ni, Cr, Zn, Cu, and Cd...

Water samples were obtained from 63 boreholes around Kuto, Abeokuta, Nigeria, and analysed for some physicochemical parameters and heavy metals. The mean concentrations of TDS, Alka, F⁻, Fe, Mn, Pb, Zn, Ca²⁺, K⁺, Mg²⁺, Na⁺, SO4²⁻, SiO2, HCO3⁻, Cl⁻, and CO3²⁻ were 1136, 27.45, 1.232, 0.521, 0.035, 0.013, 0.286, 78.48, 5.796, 89.91, 193.5, 298.3, 3.6...

Surface water is a major source of heavy metal contamination due to land use variabilities and can impair the health status of humans especially children when consumed. This study investigated the arsenic concentration in surface water of River Balogun in south-west Nigeria. Fifty-one samples were collected from 17 points along the river and were e...

The use of antiseptics for the removal of bacteria in water has become pertinent given that most hand dug wells, boreholes, and surface waters are already contaminated in their in situ condition before being used. But, the efficacy of these skin disinfectants (antiseptics) is usually not well spelt out for the aforementioned purpose, and usage may...

Bitter leaf and Fenugreek seed oils were extracted from their parent seed plants for use as corrosion inhibitors for mild steel in HCl. Corrosion measurements were taken at a time interval of 72 h. The Fenugreek seed oil gave 90% efficiency with a regression coefficient of 0.99 in terms of its ability to resist HCl corrosion, while the bitter leaf...

Bernoulli’s equation was applied to a section of hopper collector to determine the appropriate dimensions of the hopper for rainwater harvesting. Also, the hopper surface area (SFA) for a given volume was minimized by differentiating it in relation to the slant angle (SA). Combining the rational formula—Manning’s equation and the best hydraulic sec...

The need for low-cost wastewater treatment alternatives especially in poor hinterlands, where synthetic coagulants or activated carbon may not be cheaply and readily available, necessitated this study. Moringa Oleifera (MO) kernel was investigated as coagulant in the purification of wastewater polluted with lead. The adsorption potential of MO was...

Activity concentrations of the radionuclides (²³⁸U, ²³²Th and ⁴⁰K) were analysed using high resolution co-axial HPGe gamma ray spectrometer system to know the implication where groundwater is sourced from Enugu, South-East Nigeria. The activity concentration of ²³⁸U ranges from 37 ± 4 to 74 ± 6 Bq kg⁻¹ with the highest value of 74 ± 6 Bq kg⁻¹ noted...

This experimental research assessed the engineering and geotechnical properties of Aluminum dross (ALDR). Glumly, this solid waste is usually open dumped with detrimental effect on the environment. In a bid to reduce solid waste in the environment and also improve pavement interlayer properties, this research utilized ALDR as a stabilizer for tropi...

Quantification of PM2.5 (particulate matter <2.5 µm) bound heavy metals and their potential health risks were carried out around a cement manufacturing company in Ewekoro, Nigeria. The PM2.5 samples were collected using Environtech gravimetric sampler. A four-staged sequential extraction procedure was used to fractionate PM2.5 bound chromium (Cr),...

Classroom environment is not supposed to be attractive for teaching and learning alone but conducive for the test or assessment of the degree of learning taking place there. Classroom tests and examinations are means of establishing a students’ level of accomplishment in a given subject. The classroom is expected to protect the learner from the vag...

The right physical environment of learning is a sine qua non for the realization of positive outcomes in any country’s educational programme. Right environment in this work will include the combination of physical structures, right timing of teaching and learning, seating arrangement, level of sanitation and pollution of the environment, climate co...

Classroom environment is not supposed to be attractive for teaching and learning alone but conducive for the test or assessment of the degree of learning taking place there. Classroom tests and examinations are means of establishing a students’ level of accomplishment in a given subject. The classroom is expected to protect the learner from the vag...

Groundwater pollution resulting from anthropogenic activities and poor effluent management is on the rise in Nigeria. Hence, groundwater used for domestic purposes is questionable and therefore calls for scientific scrutiny. Investigation of hydrochemical interactions and quality of groundwater resource is essential in order to monitor and identify...

Heavy metals find their way into surface and groundwater due to degrading environmental conditions, and as such consistent monitoring to avoid the adverse health implications associated with the consumption of polluted water is required. This study examined the concentrations for Lead (Pb), Nickel (Ni), Zinc (Zn), Chromium (Cr), Cadmium (Cd), Coppe...

The determination of dispersion number or its coefficient is pertinent to the control of pollution. This study evaluated the importance of the parameters measured from a river in South West Nigeria, during tracer studies using the Euler–Lagrangian approach. Several measurements which included tracer concentration, width, velocity, sampling time, an...

Some water-use practices taking place along River Atuwara are conflicting and detrimental to public health and the environment. The Ogun State Water Corporation (OGSWC), which has the responsibility of supplying piped water to residents and industrial firms, also withdraws raw water from River Atuwara. However, OGSWC has low capacity to meet demand...

Heavy metal contamination levels, their potential sources and associated health risk of River Balogun – a major source of water for daily domestic activities–were investigated using statistical techniques and some health risk indices. To achieve this, 51 samples from 17 stations (STs) along the river were collected in December 2016 and analyzed for...

Constant drinking water monitoring schemes are necessary because hazardous substances tend to enter water bodies through geodetic and anthropogenic sources. The main goal of this study was to evaluate the human health risk assessment posed by high fluoride and iron concentration in tap water used for domestic activities and consumption. In this stu...

The present study investigated the ionic and fluoride concentrations in tap water and its associated health risk to local dwellers of Ogun State (Abeokuta south), Nigeria. 63 samples were collected from twenty-one different locations. Results obtained revealed the mean concentration of fluoride (F-) as 1.23 mg/L. Other water quality parameters such...

Dissolved Oxygen (DO) is an important parameter to be monitored as far as water quality of rivers and streams are concerned. On the other hand, in rivers and streams, varying roughness occurs naturally but their contributions to DO availability is yet unknown. This paper examines the effects of varying roughness of different sizes and arrangement p...

Noise pollution has been shown to be a global health hazard and this could be aggravated by the use of noise-emitting generators. Therefore, this study aims to determine the Sound Pressure Levels Sound Power Levels as well as Noisiness of sixty different models with various Power-ratings from fourteen generator brands, commonly used in homes/office...

Adsorption of copper ions out of aqueous solution by preparing activated carbon from unripe Musa paradisiaca peel (UmpP) with KOH was investigated. Estimation of the adsorption constants was achieved by adopting the Langmuir and Freundlich models. Results revealed that the adsorption process was fast and equilibrium was reached at 55 mins. The adso...

The sales of sachet water (SW), also known as “pure water” (PW), in Nigeria is a lucrative business. It serves many people, especially low-income earners, by providing a more affordable access to safe drinking water when compared with table water. However, some of the producers of SW do not effectively treat raw water before packaging them for sale...

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Groundwater is the most accessed freshwater source in Nigeria. However, the groundwater resource sector of Nigeria is confronted with pollution problems arising from both natural causes and human activities. The current study examines the case of a faith-based campus whose water needs are 100 % serviced via groundwater. The campus accommodates abou...

Ra concentrations were studied to represent the radiological risk of groundwater of the Giri and Kuje areas of Abuja, North-Central Nigeria. Two borehole water samples were collected from the Giri and Kuje areas of Abuja with a hand-dug well and Abuja Water Board as control. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used to measure...

Most households frequently make use of disinfectants to annihilate infectious bacteria present in toilets and bathrooms. Unfortunately, some of these bacteria may be required for the degradation of sewage in the septic tank system (STS). This paper investigates how the performance (degradation capacity) of sewage will be affected by the inharmoniou...

Target 6 of the Sustainable Development Goals is aimed at the sustainable management of water using different levels of challenges and goals for different countries. The survey presented in this paper involves the distribution of 600 well-structured questionnaires to 340 mapped-out households, as well as personal interviews and group interactions t...