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1.
Adeniyi Lateef A. Akinpelu Olusegun P. Fatoke Michael T. Adeniji Margaret A. 《Journal of Material Cycles and Waste Management》2022,24(5):1948-1957
Journal of Material Cycles and Waste Management - This study investigates solid-waste handling practices by municipal waste collectors during COVID-19 pandemic period in Osogbo urban areas with the... 相似文献
2.
This study was aimed at evaluating the ameliorative effect of vitamin C on chlorpyrifos-induced sensorimotor changes involving postural reflex, limb placing, and vibrissae touch in Wistar rats. Forty adult Wistar rats of either sex were divided into 4 groups of 10 animals in each group. Group I was administered soya oil (2?mL?kg?1) while group II was given vitamin C (100?mg?kg?1); group III was dosed with chlorpyrifos (10.6?mg?kg?1, i.e. ~1/8th of the LD50); group IV was administered vitamin C (100?mg?kg?1) and then exposed to chlorpyrifos (10.6?mg?kg?1), 30?min later. The regimens were administered by gavage once daily for a period of 17 weeks. Neurobehavioral parameters involving postural reflex, limb placing, and vibrissae touch responses measured at various intervals revealed a deficit in postural reflex, limb placing, and vibrissae touch responses in the CPF group, which was mitigated by vitamin C pretreatment. The neuronal and glial cell degeneration, increased brain malonaldehyde concentration, and decrease in superoxide dismutase, catalase, and acetylcholinesterase activities recorded in the group given chlorpyrifos were ameliorated by vitamin C. Therefore, vitamin C was shown to mitigate chlorpyrifos-induced sensorimotor deficits partly due to its antioxidant and acetylcholinesterase restoration properties. 相似文献
3.
Salami Olasunkanmi Ismaila Kolawole Taofik Oriolowo Olusegun Gabriel Akanbi 《International journal of occupational safety and ergonomics》2013,19(4):607-611
This study aimed to assess cardiovascular strain during sawmilling operations in terms of physical workload, based on heart rate changes. We measured resting and working heart rates and calculated cardiovascular load (%CVL), cardiovascular strain (%CVS) and relative heart rate (%RHR) in 35 sawmill workers. Based on heart rate only, the work in sawmills was classified as very heavy and extremely heavy. Similarly, a high-level category was recorded for %CVL and a very high range for %CVS. Thus, the workload in sawmill operations is usually very high and can lead to physiological strain of the workers. There is a need to redesign the work content of this occupation to prevent excessive strain in the workers, as this will increase their productivity and reduce their health risk. 相似文献
4.
Olusegun Sunday J. Mohallem Nelcy D. S. Ciminelli Virginia S. T. 《Environmental science and pollution research international》2022,29(44):66547-66561
Environmental Science and Pollution Research - The adsorption of ceftriaxone (CET) and doxycycline (DOX) from aqueous solution using ferrihydrite/plant-based composites (silica rice husk) to reduce... 相似文献
5.
Ayejuyo O. Olusegun Omojole M. Olalekan Ojoniyi J. Oladipo 《Environmental monitoring and assessment》2010,163(1-4):295-301
In many developing countries, surface waters, especially rivers and lagoons, have become deposition sites for all sorts of wastes. Three sampling sites located trigonally on Epe lagoon, Lagos, Nigeria were identified, and water, sediment, and commonly farmed shrimp, Peaneus notalis, were sampled and assessed for heavy metal concentrations. Zn, Pb, Ni, Cu, Cr, Cd, and Mn were determined in the aqua regia digests of the samples by means of Perkin Elmer AAnalyst 200 atomic absorption spectrophotometer. Heavy metals occurred above detection limits at all sites. The highest load of these trace elements was found in sediment samples followed by the water samples. The levels observed in the shrimp samples, however, were much lower than WHO levels. In the distribution, zinc was the highest metal found in the samples ranging from 17.94 ± 2.60 mg/L in water to 37.85 ± 9.35 μg/g in sediments. The least was Cd 0.03 ± 0.01 mg/L in water and 0.28 ± 0.04 μg/g in sediments. Lead was the most widely varied metal in shrimp with a 84.38% coefficient of variation. Apart from Cr, the metals appeared to be fairly and evenly distributed in the sediment, with coefficient of variation ranging from 14.29% (Cd) to 24.76% (Mn) The variations were between 14.49% (Zn) and 66.67% (Cr) in the water samples. The paired t test carried out between water and sediment, water and shrimp, and shrimp and sediment was significant at p?=?0.05. Three-factor analysis of variance did not reveal any significant difference in metal burdens among the trigonally located sites under investigation. Shrimp samples showed evidence of bioaccumulation but are still below internationally established levels. 相似文献
6.
Joshua Olusegun Okeniyi Uchechuckwu Eric Obiajulu Adedamola Oluwafisayo Ogunsanwo Nosadeba Wisdom Odiase Elizabeth Toyin Okeniyi 《Mitigation and Adaptation Strategies for Global Change》2013,18(3):325-335
The potential of CH4 (methane) greenhouse gas (GHG) emissions based on a model of prevailing behavioural pattern of livestock waste management in Nigerian local farms was investigated in this paper. Livestock waste, from Sus domesticus, pig, and Gallus domesticus, poultry, were employed as substrates in the study which uses water from a fish rearing farm as the matrix medium to simulate wastewater pool/river environment. A substrate to fish-water ratio of 1:3 by mass was used in developed laboratory-size digesting reactor system with U-tube water displacement, to facilitate volumetric readings of gas production, for each mix of the livestock waste. Volumetric readings from these, at ambient temperature conditions in the retention time of 32 days, follow the Normal probability density function, in accordance with Kolmogorov-Smirnov goodness-of-fit criteria. These readings showed that CH4-containing gas as high as 67.3?×?10?3 dm3 was produced on the 14th day from the pig and 86.8?×?10?3 dm3 on the 13th day from the poultry substrates. The overall CH4-containing gas productions of 255.4?×?10?3 dm3/kg and 323.58?×?10?3 dm3/kg were observed for the pig and the poultry substrates, respectively. A 70% scale-up analysis, modelled from these results, for the nation yield potential emission of about 4 kg CH4 (that could be as potent as 84 kg CO2-equivalent) annually. The environmental implications on global warming and possible prospects of recoverable domestic benefits from the waste through the adoption of sustainable policy of livestock waste managements for mitigating the CH4 emissions in Nigerian local farms are presented. 相似文献
7.
Akindele Emmanuel Olusegun Alimba Chibuisi Gideon 《Environmental science and pollution research international》2021,28(7):7636-7651
Environmental Science and Pollution Research - Rapid population growth and poor waste management practice are among the main drivers of plastic pollution in modern times, thus making Africa a... 相似文献
8.
Abimbola AF Kehinde-Phillips OO Olatunji AS 《Environmental geochemistry and health》2007,29(2):163-167
The aim of this study was to assess the heavy metal content of the dust generated by the Sagamu cement factory and its attendant
health hazards on the immediate environment, especially on the inhabitants of the area. A total of 25 samples were collected
and analyzed using inductively coupled plasma-optical emission spectrometry. Records of medical ailments associated with heavy
metal toxicity were also compiled from the Obafemi Awolowo Teaching Hospital situated in the town.The results for some of
the selected heavy metals showed the following pattern: limestone: Cd (n.d.-1.7 ppm), Pb (42–48 ppm), Cu (3.0–11 ppm), Zn
(7.0–53 ppm) and Ni (3.0–8.0 ppm); shale: Cd (0.3–1.1 ppm), Pb (17–22 ppm), Cu (2.0–11 ppm), Zn (17–147 ppm) and Ni (3.0–18 ppm);
dusts: Cd (0.5–0.7 ppm), Pb (32–52 ppm), Cu (2–16 ppm), Zn (5–152 ppm) and Ni (2–17 ppm); soils: Cd (0.5–1.1 ppm), Pb (28–49 ppm),
Cu (22–35 ppm), Zn (43–69 ppm) and Ni (13.0–17 ppm). High levels of heavy metals were found in the rocks and soils. We propose
that the high levels of metals in the dust and soil were acquired from the raw materials used by the cement factory and from
active industrial discharge from this same factory. Medical records and the current health situation of the local residents
in the study area reveal that there have been increases in the prevalence of diseases linked to heavy metal toxicity in the
environment, especially those related to dust generation. 相似文献
9.
Trace metal levels in selected fruit juices and carbonated beverages purchased in Lagos, Nigeria were determined using atomic absorption spectrophotometer (Unicam model 969) equipped with SOLAAR 32 windows software. Fruit juices analysed were grape, pineapple, apple, orange, lemon juices and their brand names were used. Some carbonated drinks were also evaluated for metal levels. Trace metals investigated were Cr, Cu, Pb, Mn, Ni, Zn, Sn, Fe, Cd and Co. Trace metal contents of fruit juices were found to be more than the metallic contents of carbonated beverages. Pb level in the fruit juices ranged from 0.08 to 0.57 mg/l but was not detected in the carbonated drinks. Concentrations of Pb in lemon juice and Mn in pineapple juice were relatively high. Cd and Co were not detected in the selected juices and beverages. Additionally, Pb, Cu, Cr and Fe were not detected in canned beverages but were present in bottled beverages. However, the metal levels of selected fruit juices and carbonated beverages were within permissible levels except for Mn in pineapple juice and Pb in lemon juice. 相似文献
10.
Crab samples, both male and female specie, were purchased from fishermen at the Ojo Rivers, Lagos, Nigeria. The samples separated
into abdomen, muscle tissue, and thorax were oven dried at 80°C for 3 days. The dried samples were then pulverized in a clean
acid-washed mortar and pestle. Approximately 1.00 g each of the pulverized samples was weighed and Zn, Cr, Pb, and Cd were
determined in the solution of the aqua regia digested samples by means of AAS (Buck Scientific 210 GVP model). The results
obtained showed Zn metal to be consistently higher in all the female parts compared to the male with values of 12.92 ± 3.65 μg/g
to 16.03 ± 1.08 μg/g and 9.33 ± 1.77 μg/g to 15.75 ± 1.02 μg/g, respectively. Mean values of 0.39 ± 0.09 μg/g and 0.22 ± 0.02 μg/g
cadmium were found in the abdomen and tissue of the male crab as against 0.35 ± 0.07 μg/g and 0.17 ± 0.07 μg/g in the female
crab. The tissues of both species have comparable value of chromium. Lead was below the detection limit of 0.05 μg/g in the
tissues of male crab but the female tissue contained 0.83 ± 0.13 μg/g and in other parts identified, lead was consistently
higher than the 2.00 μg/g permissible level of WHO in foods. A simple pair t-test did not demonstrate any significant difference in the distribution of metals between the male and female crabs. The
coefficient of variation (CV) calculated for each metal with respect to the studied parts showed Pb to be widely distributed
(56.23–89.54%) while Cr did not vary widely (4.17–8.20%). 相似文献