Deparment Of Environmental Management and Toxicology

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Browsing Deparment Of Environmental Management and Toxicology by Author "Olalekan Oluwatoyosi Salami"

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    Ecological vulnerability: seasonal and spatial assessment of trace metals in soils and plants in the vicinity of a scrap metal recycling factory in Southwestern Nigeria
    (Springer International Publishing Switzerland, 2014-07-18) Oyediran K. Owoade; Olusegun Olufemi Awotoye; Olalekan Oluwatoyosi Salami
    The concentrations of selected heavy metals in the soil and vegetation in the immediate vicinity of a metal scrap recycling factory were determined in the dry and wet seasons using the Atomic Absorption Spectrophotometer. The results showed that the soil pH in all the sites indicated slight acidity (from 5.07 to 6.13), high soil organic matter content (from 2.08 to 5.60 %), and a well-drained soil of sandy loam textural composition. Soil heavy metal content in the dry season were 0.84–3.12 mg/kg for Pb, 0.26–0.46 mg/kg for Cd, 9.19–24.70 mg/kg for Zn, and 1.46–1.97 mg/kg for Cu. These values were higher than those in the wet season which ranged from 0.62–0.69 mg/kg for Pb, 0.67–0.78 mg/kg for Cd, 0.84–1.00 mg/kg for Zn, and 1.26–1.45 mg/kg for Cu. Except for cadmium in the dry season, the highest concentrations occurred in the northern side of the factory for all the elements in both seasons. An increase in the concentrations of the elements up to 350 m in most directions was also observed. There was no specific pattern in the level of the metals in the leaves of the plant used for the study. However, slightly elevated values were observed in the wet season (Pb 0.53 mg/kg, Cd 0.59 mg/kg, Cu 0.88 mg/kg) compared with the dry season values (Pb 0.50 mg/kg, Cd 0.57 mg/kg, Cu 0.83 mg/kg). This study showed that the elevated concentrations of these metals might be associated with the activities from the recycling plant, providing the basis for heavy metal pollution monitoring and control of this locality that is primarily used for agricultural purposes.
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    Health Problems Associated with Frequent Use of Cell Phone Among Students in University of Ibadan, Nigeria
    (Trends in Applied Sciences Research, 2019) Adedotun Timothy Adeolu; Victor Adeyimika Adedokun; Olalekan Oluwatoyosi Salami; Elizabeth Olabisi Ayoola
    Abstract Background and Objectives: Mobile phones are no longer considered an accessory but have become a basic requirement of peopleʼs lives. So, many people especially the youth are dedicating a major part of their daily routine to using mobile phones. The popularity of the cell phones is often followed by an alarm towards the detrimental effects of cell phone radiations. This study aimed to identify the health problems related with frequent use of cell phone among undergraduate students of University of Ibadan, in southwestern Nigeria. Materials and Methods: The study was carried out among selected undergraduate students of the University of Ibadan, Nigeria. Purposive sampling technique was used to select 364 students from five halls of residence. A self administered semi-structured questionnaire was used to elicit information on the socio-demographics, extent of cell phone usage, factors that influence the pattern of cell phone usage, perceived health concerns with frequent usage of cell phone. Data collected were subjected to percentage; mean, standard deviation, correlation and chi-square statistical analyses. Results: Few (22.7%) of the students reported strong attachment to their phone and cannot do without it in a day and believed that the attachment could cause insomnia, migraine and even cancer. The findings revealed that few (37.7%) of respondents agreed that frequent phone usage could cause cancer, loss of concentration (51.7%) and anxiety (55.4%) Conclusion: The study concluded that there was a direct relationship with strong attachment to phone usage and insomnia, headaches and concentration which can affect the health and academic performance of students.