Browsing by Author "Oloruntoba, E. O."

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Lead and Cadmium Bioaccumulation in Amaranthus cruentus L. and its Health Implication.
(2018) Adekunle, S. T.; Oloruntoba, E. O.; Fayinminnu, O. O.; Fakunle, A. G.
Lead and Cadmium are among the major toxic heavy metal contaminants found in anthropogenic soil. However, there has been a growing concern on human health risk from these metals bioaccumulation in vegetables grown on such contaminated soils. This study investigated lead and cadmium bioaccumulation in Amaranthus cruentus and the implications on human health. Pot culture experiments were carried out in which A. cruentus plants were grown in soil contaminated with varying concentrations of lead and cadmium salts (100 mgPb/kg+10 mgCd/kg, 200 mgPb/kg+20 mgCd/kg, and 400 mgPb/kg+40 mgCd/kg). Plants in the control soil were grown without the heavy metals salts. Plant growth was observed under greenhouse conditions and plants were harvested after five and ten weeks. The concentrations of lead and cadmium in the plant tissues were determined using Atomic Absorption Spectrophotometry. Throughout the experiment, no visible symptom of metal toxicity was observed on any plant. The concentrations of lead measured in plant shoot across the groups ranged from 11.5 to 135.7 and 30.5 to 200.5 mg/kg while that of cadmium ranged from 0.1 to 133.1 and 0.5 to 166.7 mg/kg at five and ten weeks, respectively. Lead and cadmium bioaccumulation in the plant increased significantly with increasing levels of soil contamination, and the values were far above FAO/WHO recommended safe limits of 0.3 and 0.2 mg/kg for lead and cadmium, respectively. The high capacity for lead and cadmium bioaccumulation in the edible parts of A. cruentus coupled with the absence of visible phytotoxic symptoms implies a potential danger for humans.
Nigerian environment and health security: Current issues and projections to Year 2050
(2019) Anetor, J. I.; Oloruntoba, E. O.; Ana, G.R.E.E.; Okareh, O. T.; Lateef, S.; Akinsete, S. J.; Hammed, T. B.; Adejumo, M.; Sridhar, M.K.C.; Orunmuyi A. T.
In line with the NUC request to the University of Ibadan to develop a 'Blueprint for Health Security in Nigeria by 2050', this document was prepared to highlight steps and discuss actions required toward achieving this goal. Method: The situation of environmental problems in Nigeria such as: erosion and land subsidence, flooding (coastal, river and urban), drought and desertification, oil pollution from spills, and well blow-outs, biodiversity loss, industrial and municipal pollution from wastes, climate change, toxic and hazardous wastes, including E-waste, were addressed in the blueprint. Results / Comments: Although Nigeria is unlikely to be attacked with nuclear explosives, plans of nuclear power development, makes it desirable for nuclear security and emergency preparedness response measures to be put in place. A holistic forecasting of major environmental health factors is suggested; keeping in view the year 2050 is a little over 3 decades away. In addition, SWOT analysis of Environmental Management was carried out while processes of monitoring and evaluation, as main tools for achieving health security in Nigeria by 2050 were identified and reported. Conclusion: Achieving health care for all by 2050 though a gigantic task, Nigeria has adequate Environmental Health and Scientific manpower and resources to address the issues. This document should educate the general public on Environmental Health and its different components which include; Climate Change, Water, Sanitation and Hygiene (WASH), Environmental Chemical Pollution, Food safety and Hygiene, Waste Management and Air Quality among others.
Occurrence of bisphenol A, nonyphenol, octylphenol and heavy metals in groundwater from selected communities in Ibadan, Nigeria
(IWA PUBLISHING, 2023) Adebesin, T. N.; Lateef, S. A.; Oloruntoba, E. O.; Adejumo, M. M.
Endocrine disruptors (EDs) such as bisphenol A (BPA), nonylphenol (NP), octylphenol (OP) and heavy metals in drinking water supply represent a significant threat to human health. In Nigeria, little is known about the presence of EDs in various environmental media. This study was conducted to determine the concentrations of BPA, NP and OP in groundwater samples from selected communities in Ibadan, Nigeria. Water samples were collected from 30 different sites (26 hand-dug wells, 2 boreholes and 2 spring water sources), 15 from each of Ibadan North-West (IbNW) and Ido Local Government Area (LGA). Samples were collected in triplicate from all the sampling points and analysed for BPA, NP, OP and physicochemical parameters (including heavy metals) using a standard procedure. Bisphenol A and octylphenol were not detected in any samples, while NP was detected in spring water and the concentration (0.00279 mg/L) was less than the maximum allowable limit (0.015 mg/L). All (100.0%) boreholes in IbNW and 100.0% of the springs in Ido LGA showed iron concentrations that exceeded the permissible limit. There is a need for public awareness on the health risk of EDs in drinking water supply and appropriate preventive measures to be adopted.