A.T. Towolawi

Fountain University Osogbo Nigeria · Environmental Health Science

The leaf of coffee senna or septic weed, Senna occidentalis, is among the medicinal and toxic plants whose toxicity on fish has not thoroughly been assessed. The study used 120 Clarias gariepinus juveniles with an average body weight of 16 ± 2 g and length of 8.5 ± 0.5 cm, randomly distributed in 12 plastic tanks of 35 L capacity filled up to 10 L...

The study investigated of varied levels' effects of Paullina pinnata ethanol leaf extract on Clarias gariepinus juveniles in a 2-phase (range-finding and main) experiment. Two hundred and fifty Clarias gariepinus juveniles were acclimatised for two weeks at the Fish Hatchery complex of the Federal University of Agriculture, Abeokuta, where they wer...

The daily generated solid waste poses threats to the lives on land and below water, human health and well-being, and humans’ sustainable cities and towns. The concerns from such threats instigated the current study to compare six locations across three states (Osun: Ring Road and Fountain University Osogbo Community, Lagos: Ikorodu and Ikeja, and O...

Biometeorologists typify climate change indication on the environment using indices such as the heat load index (HLI) with scales of HLI: ≤ 70.0 for cool, 70.1 to 77 for warm, 77.1 to 86.0 for hot, and ≥86.1 for a very hot environment. The current study adopted HLI computed from temperature, relative humidity, and wind speed data of 32 years (1987-...

Background: Fishermen traditionally explore plant extracts to weaken and catch fish without phytotoxic consideration. Objective: The study investigated the toxicity of Sida acuta leaf ethanol extracts on Clarias gariepinus juveniles. Methods: Two-staged (range-finding and main) experiment of 120 hours assessed the sourced and a week acclimatized fi...

Water is abundantly available, but that of good quality for good health and well-being is not accessible thereby making cities and communities to be doubted for sustainability. Ascertaining water of good quality requires more than comparing the laboratory results with regulatory standards; exploring the multifaceted approach to check the quality of...

Respiratory rate prediction(RRP) is vital for human or animal medical checkups for a good health and well-being (SDG 3) to be established. The RRP is one of the biometeorological indices adopted to determine health-related climate indication, which is categorised into normal: 85, warning: between 85 and 110, danger: between 110 and 133, and emergen...

The escalating concern of heavy metal contamination in fruits underscores the need to evaluate associated health risks linked to their consumption. This study undertook assessment of heavy metal levels in commonly consumed fruits (orange, watermelon, and apple) retailed by roadside vendors in Okinni, Egbedore Local Government Area, Osun State. Data...

This study examined the levels and health threat assessment of organochlorine pesticides (OCPs) and heavy metal (HM) residues in five selected foodstuffs-sorghum, maize, rice, garri (processed fried cassava), and beans-randomly collected from three markets within the Abeokuta metropolis in southwestern Nigeria. Gas chromatography-mass spectrometry...

This study focuses on assessing the handling, collection, and disposal of healthcare waste (HCW) at Obafememi Awolowo Teaching Hospital Wesley Guide in Ilesa, Nigeria. The research aims to determine the quantity of HCW generated, explore methods of HCW collection and disposal, and evaluate overall waste management practices in the hospital. The qua...

The threats of climate change on water and crop in agriculture show food security with possible zero hunger. The effects necessitate assessing specific water management and crop varieties adaptation that the rain-fed farmers use for sustainable agricultural production. The study used 1600 copies of the questionnaire to gather farmers’ specific wate...

This study compared the presence of selected heavy metals in Gbagede dumpsite (GD) and Ilokun dumpsite (ID) dumpsite in Kwara and Ekiti State with the host communities Gbagede community (GC) and Ilokun community (IC). Ten soil samples were collected randomly at 10 cm depth, digested and analyzed for Cadmium (Cd), Copper (Cu), Manganese (Mn), Zink (...

Background and objectives: Breast milk is an essential source of nutrients and energy for infants. The study analyzed for the levels of essential, toxic and rare earth elements in the breast milk of lactating mothers within Abeokuta metropolis. Materials and methods: Thirty-seven (37) breast milk samples were collected with consents of lactating...

Climate parameters can be used to verify already established model for climate variability or change indication (CCI) of environmental stress (ESI) to ensure agricultural productivity and sustainability. The study verified ESI from 32-year temperature, relative humidity and solar radiation data across four (Benue, Edo, Niger and Ondo) States in Nig...

Climate change puts food system at risk if there are no effective adaptation strategies. The study investigated influence of farmers' demographics (education, age and gender) on twelve considerable factors for adaptation strategies across four (Edo, Ondo, Benue and Niger) States in Nigeria by subjecting 1600 copies of pretest questionnaire to stepw...

Climate change puts the food system at risk if there are no effective adaptation strategies. The study investigated the influence of farmers' characters (education, age, and gender) on twelve considerable factors for adaptation strategies across four (Edo, Ondo, Benue, and Niger) States in Nigeria by subjecting 1600 copies of a pretest questionnair...

This study compared the presence of selected heavy metals in Gbagede dumpsite (GD) and Ilokun dumpsite (ID) dumpsite in Kwara and Ekiti State with the host communities Gbagede community (GC) and Ilokun community (IC). Ten soil samples were collected randomly at 10 cm depth, digested and analyzed for Cadmium (Cd), Copper (Cu), Manganese (Mn), Zink (...

The use of water to satisfy human without any health risk necessitates the need for assessment of potable water quality for human consumption. Water samples were collected across six selected housing estates for two consecutive dry and wet seasons within Ogun State, and their parameters such as TDS, EC, Mn, Zn, Cd, Pb and Ni were analysed for quali...

Benzyl butyl phthalate (BBP) is used in plastic industry and leaches into the environment through effluent and indiscriminate dumping of plastic wastes with possible deleterious effects on fish and other aquatic animals. Standard solution of 100 mg/ L was prepared from 10 mg of BBP stock solutions dissolved in acetone as carrier agent, and the used...

Quarrying activities are explored to extract a variety of materials deposited underneath the earth surface. These activities however can potentially impact negatively on soil quality and cause elemental pollution. This study assessed soil quality and distribution of metals in soils around four quarrying sites (PAPA, S&D, TCity and Mile 8) within Ab...

The study assessed carbon sequestration potential of the identified trees {Gmelina, Mango, Neem, Masquerade, Step and Cassia} along the five selected roadsides in Abeokuta metropolitan. Leaves of the identified trees were plucked, digested in triplicate and analysed for chlorophyll (Ch) A, B and A+B contents using UV-visible spectrophotometer. Obta...

Acquisition of land for farming activities is hitting hard on the interested smallscale farmers in Nigeria while the available land faces climate change influenced degradation. This current research verified how farmers are coping across four rain-fed (Benue, Edo, Ondo and Niger) states using 1600 copies of pretested questionnaire administered thro...

The threats of climate change on agricultural systems, water availability and crop performance put pressure on food security and zero hunger. The effects call for multifaceted mitigation and necessitate this research to investigate water management (W.M.) and crop varieties (CRV) adaptation being used by the rain-fed farmers that have the records o...

Anthropogenic activity has the tendencies to negatively impact quality of natural resource in the neighbourhood. Water which is required of man for adequate, hygiene and proper sanitation is a typical example of resource that abattoir activity hardly leaves undisturbed. This prompted the current study to assess water quality around Oko-Oba area of...

Groundwater is an important source of freshwater and its quality determines it's potential for domestic and agricultural use. Water samples from ten boreholes located within the Federal University of Agriculture Abeokuta, Nigeria were collected and analysed for physico-chemical and bacteriological properties , cations and metals using standard proc...

This study investigated the antibacterial potentials of a sensitive plant (Mimosa pudica) and bitter melon (Momordica charantia) leaf extracts against bacterial isolates of Clarias gariepinus. Samples of infected C. gariepinus were collected and analysed microbiologically using standard methods. Isolated bacteria were subjected to sensitivity test...

Traditional plants have been found useful for various purposes by the fish artisanals, but their toxicity on the fish is hardly considered. This study assessed the toxicity of castor (Ricinus communis) seed extract on catfish (Clarias gariepinus) juveniles in a static renewable bioassay. The study involved 500 fish samples collected from Motherhood...

Available ground and surface water around abattoirs within Abeokuta metropolis was assessed for their quality. Nine (four stream, three ground (borehole) and two control) water samples were randomly collected in 10 days interval from different abattoirs in April, 2019 (the month between dry and wet season) three times and analysed using standard pr...

Sewage Sludge (SS) land application remains the best sustainable disposal method. The present study evaluated SS samples tested on Amaranthus viridis Linn for phytotoxic effects. The soil and SS samples were analysed for Organic Matter (OM), N, P and K contents; exchangeable cations: Na, Ca and Mg using standard methods. Application of the SS foll...

The study investigated phytotoxic effects of aqueous Erythrophleum suaveolens stem bark (AES) at 3.00, 2.25, 1.50 and 0.75 g/ L while leaf (AEL) at 3.50, 2.63, 1.75 and 0.88 g/ L extracts as treatments on 300 samples of Clarias gariepinus. Static non-renewal bio-assay test was used to determine the 96-hr acute toxicity while exposed the fish to 1/...

Chemical compositions of soil have influences on its fertility. The research was carried out in dry and wet seasons to observe soil chemical parameters and fertility in six different housing estates across Ogun State, Nigeria Soil samples were collected at the depth of 0-15 cm in a polythene bag; three samples from three points per site, three time...

Levels of criteria air pollutants (CAP) between Dry and Wet seasons vary, this could be indicated when assessed and compared with the thresholds. Their seasonal variations were assessed in six chosen housing estates for possible air pollution on the inhabitants, whose intention is to live in an area that is conducive. Six CAP and noise levels were...

ABSTRACT Leachate is a major threat to groundwater quality and ecosystem. The present study adopted four selected coagulants (inorganic: Al2(SO4)3 [Alum], FeCl3, FeSO4; biological: Moringa oleifera) and a complexing agent (ethylenediaminetetraacetic acid EDTA) to remediate leachates collected from two dumpsites in Abeokuta. The leachate samples wer...

Traditional means of capturing fish dwells on active components in plant which elicit harmful effects. Erythrophleum suaveolens is a typical example of such plant, which the study investigated for its stem-back (ASE) and leaf (ALE) aqueous extracts sub-lethal effects on Clarias gariepinus. Qualitative phytochemical screening of both extracts was ca...

Vehicular pollutants influence respiratory effects identifiable through human perceptions and estimation of air pollutant concentrations. Twenty-four officials were examined at four traffic stations; six officials per station, twice a month for three months, considering early and late daily rush hours and vehicle volume using questionnaire. Six air...

Greenspace campaign regulates urban air quality and global warming effects. Four areas with trees planting (TP: Ojota-Ketu, Anthony, Costain and Airport-Agege) and non-trees planting (NP: Mile 12, Jibowu, Ojuelegba and Iyana-ipaja) were selected considering traffic volumes. Gaseous pollutants: CO, CO2, NOx, SO2, VOC; SPM and noise levels; meteorolo...

There is a necessity to assess soil properties with the view to determining soil qualities relative to pollution and sustainability of ecosystem functions and plant productivity regardless of the scale. Soil samples (six points per site at 0-15 cm depth) from six selected housing estates across Ogun State were assessed for soil pH and heavy metal...

Carbon dioxide (CO 2) is the major greenhouse gas and global warming propellant which is released from human activities especially vehicular emission. The study examined carbon sequestration potential of roadsides trees in Abeokuta, Ogun State. The major roads selected were Asero-Obantoko (AO), Brewery-Itaoshin (BI), lyana Mortuary-Idiaba (IMI), Pr...

The availability of cheaper food energy sources which compares favourably well with other high priced cereals is of utmost importance and should be encouraged. Cocoyam presents such an opportunity as it can compete with other contemporary root crops like cassava, yam and potatoes with respect to its proximate and mineral contents. It however contai...

Release of crude oil and its products into the environment has resulted in many problems that are of global concern. The objective of this study was to determine effect of Composted Market Waste (CMW) on the degradation of Polycyclic Aromatic Hydrocarbons (PAHs) in crude oil-contaminated soil. Pot experiment was carried out with 1 kg of soil in 7 l...

The quality of milk and cheese produced by Settled Fulani Pastoralists (SPFs) are of food safety concern. This study analysed heavy metals in milk and cheese, and phthalate esters in cheese products in Ogun and Oyo States Nigeria. Purposive sampling technique was used to select 55 equal products samples from 13 communities in the study areas. Milk...

Objective: To determine the levels of some selected heavy metals in both the selected anti-diabetic herbal plants and infused concoctions for diabetes treatment. Methods: Ten anti-diabetic plant samples: pawpaw leaves (Carica papaya), bitter melon leaves (Momordica charantia), holy basil leaves (Ocimum sanctum), bitter leaf (Vernonia amygdalina), g...

The research observed sewage sludge as a potential alternative fertiliser which was analysed before amending with soil & tested the plant for levels of available heavy/ toxic metals (HMs) using standard methods. The green Amaranth grown on the sewage sludge amended soil was analysed for the selected HMs. The indexes employed for Phytoaccumulation A...