Papers by Anuoluwapo O M O S I L E O L A Jolaoso
Journal of Geoscience and Environment Protection, 2016
Sediments are complex environments, with varying physicochemical characteristics, such as composi... more Sediments are complex environments, with varying physicochemical characteristics, such as composition and type of organic matter, particle size distribution, and pH. Contaminated sediment is a significant environmental problem affecting many marine, estuarine and freshwater environments throughout the world. Most assessments of water quality have historically focused on water-soluble compounds, with relatively little attention paid to sediment. The aim of this research is to assess the physical and chemical parameters of sediments from Nwaja Creek, Niger Delta, Nigeria. Monitoring of this sediment quality is an important part of preserving and restoring the biological integrity of water bodies as well as protecting aquatic life, wild life and human health. Sediment samples from Nwaja Creek were sampled from seven sampling stations along the creek for over three months May to July, 2015, rainfall peak period, for assessment of their physical and chemical characteristics, such as grain size, organic carbon, pH, conductivity, nitrate and phosphate. These parameters are known to influence the interactions and dynamics of pollutants within sediment matrix. Sediment particle size distribution indicates that they have higher proportion of clay (clay > silt > sand), the mean percentage composition of clay, silt and sand ranged between 64.28% ± 22.04%-72.36% ± 14.00%, 18.71% ± 12.03%-27.32% ± 22.17% and 8.40% ± 6.28%-9.76% ± 4.59% respectively. TOC in the study area is generally above 1% across all stations during the study period with a range between 0.98% and 4.58%. Minimal monthly and spatial variations are observed in particle distribution, pH (3.9-8.5) and phosphate (5.5-15.5 kg/mg) while significant variations are observed in conductivity (23.0-567.0 uS/cm), total organic carbon (0.98%-4.58%) and nitrate (0.45-11.9 mg/kg) concentration. It is concluded that physicochemical characteristics of the sediments from Nwaja Creek are influenced by anthropogenic sources
Journal of Applied Sciences and Environmental Management, 2019
The cytogenotoxic effects of emulsifiable concentrate of amitraz pesticides was evaluated using A... more The cytogenotoxic effects of emulsifiable concentrate of amitraz pesticides was evaluated using Allium cepa L. test. The root meristems of A. cepa L. were treated with five concentrations (1%, 5%, 10%, 20% and 40%) of the chemical pesticide at 48 h for cytogenetic analyses and 96 h for root length inhibition. Pesticide doses affected root length significantly (P<0.05) at 5% to 40%; with 50% effective concentration (EC50) value of 18% while there was no significant difference between control and 1% (p>0.05). The mean root length of the treated A. cepa for Amitraz pesticides in all concentrations was lower compared to the control showing the obvious mitodepressive effects of amitraz pesticides. A dose dependent reduction in the total mitotic dividing cells and mitotic index was observed in A. cepa treated with the pesticides. The values of mitotic index obtained for amitraz pesticides at 5% (5.20), 10% (4.0), 20% (2.30) and 40% (0.80) were lower than half of the negative control (7.25), which reflect its cytotoxicity. All the concentrations of the pesticides used in the present study induced important abnormalities during mitotic division. These aberrations were: chromosome stickiness, disturbed spindle, anaphase and telophase bridges, chromosome fragments, laggard chromosomes, and c-Mitosis. The highest abnormality number was observed in the root tips of Allium cepa (5%) while the least was at 40%. Frequencies of chromosome abnormalities were low at 20% and 40% concentration because of damaged cell and lower cell divisions. The present study, showed the inhibition of growth and induction of chromosomal aberrations by amitraz, this suggest their capability in inducing cytotoxicity and genome instability.
Journal of Applied Sciences and Environmental Management
This study was conducted to evaluate nutritional composition and heavy metals concentration of sm... more This study was conducted to evaluate nutritional composition and heavy metals concentration of smoked and raw edible fish species from Ologe lagoon (freshwater) and Lagos lagoon (marine). The fish species from Ologe include: Chrysichthys nigrodigitatus (Catfish), Monodactylus sebae (African moony), Pomadasys jubelini (Buro), Sphyraena barracuda (Great barracuda), and Pseudotolithus elongatus (Croaker), while that of Lagos lagoon include Chrysichthys nigrodigitatus (Catfish), Caranx hippos (Crevalle jack), Liza falcipinnis (Sicklefin mullet), Pomadasys jubelini (Buro), and Monodactylus sebae (African moony). The nutritional composition ranged in the following trend moisture (43.24 - 76.79 %) > carbohydrate (3.16 – 63.45 %) > protein (0.80 - 31.55 %) > fibre (1.07 – 2.8 %) > ash (0.81 – 1.88 %) > fat (0.40 – 1.30 %). In this study, these fishes are generally low in fats (lean fish), and fish smoking tend to reduces their nutritional composition. Heavy metals concentrati...
Notulae Scientia Biologicae
The performance and impact of Senna alata on experimental heavy metal contaminated soil were inve... more The performance and impact of Senna alata on experimental heavy metal contaminated soil were investigated in this study. Soils in different pots were contaminated with different levels of lead, nickel, chromium and cadmium based on WHO limits for heavy metals. Seeds of S. alata were planted in the contaminated soils. The plant growth was studied for 60 days. Some soil parameters and heavy metal contents of the soil were evaluated at the beginning and at the end of the study. The leaf area, the plant height and the number of actively growing stems decreased with increase in the amount of each metal added to the soil. At 60 days, there was significant reduction (p<0.05) of the heavy metals due to the growth of S. alata compared to the soil without the plant. There was reduction in the total organic matter content and the pH of the soil, but the moisture content of the contaminated soils generally increased due to the growth of S. alata. There was a positive correlation (p = 0.918)...
AFRICAN JOURNAL OF PHYCOLOGY, 2021
There have been concerns regarding the detrimental impacts of pollution from petroleum products o... more There have been concerns regarding the detrimental impacts of pollution from petroleum products on the environment due to petroleum-related activities worldwide. Hence, this study investigated the soils collected from a major automobile mechanic workshop in Lagos mainland that has existed for over 20 years and an oil spill site in Bodo creek, Rivers State. To create a composite sample for analysis, soil samples were collected using a soil auger from five different points in both sampling sites. Analyses were done using conventional techniques. The heavy metals profile of the mechanic automobile workshop showed a distribution pattern of Cu>Pb>Zn>Ni>Cd>Hg>As, while Bodo creek's heavy metal distribution pattern was Zn>Pb>Cu>Ni>Ar>Cd>Hg. All metals except arsenic (As) were found to exceed the permissible limit, according to the standard limit by the department of petroleum resources of Nigeria (DPR) 1991. Copper and lead were above intervention values of 190 mg/kg and 560mg/kg respectively. Although both environments showed variations in the level of metals detected, which may be attributed to the level of activities ongoing in both environments, almost all metals detected in the automobile mechanic workshop were higher than Bodo creek. Hydrocarbon tests revealed that the automobile mechanic workshop had higher amounts of aliphatic hydrocarbons (3211.1 mg/kg), aromatic hydrocarbons (1349.2 mg/kg), and total petroleum hydrocarbons (2246.5 mg/kg). In addition, a coccoid microalga was isolated from the soil of an automobile mechanic workshop, which showed the ability of some microorganisms to survive in a highly polluted environment. Suitable conditions for the growth of hydrocarbon-degrading bacteria and coliforms were present in both environments, but Bodo creek soil was found to support the growth of hydrocarbondegrading fungi.
Journal of Applied Sciences and Environmental Management, 2016
Twenty one sampling locations were assessed for carbon monoxide (CO), carbondioxide (CO 2), oxyge... more Twenty one sampling locations were assessed for carbon monoxide (CO), carbondioxide (CO 2), oxygen (O 2), sulphur dioxide (SO 2), nitrogen dioxide (NO 2), nitrogen oxide (NO), suspended particulate matter (SPM) and noise level using air pollutants measurement methods approved by ASTM for each specific parameter. All equipments and meters were all properly pre-calibrated before each usage for quality assurance. Findings of the study showed that measured levels of noise (61.4-101.4 dBA), NO (0.0-3.0 ppm), NO 2 (0.0-3.0 ppm), CO (1.0-42.0 ppm) and SPM (0.14-4.82 ppm) in all sampling areas were quite high and above regulatory limits however there was no significant difference except in SPM (at all the sampling points), and noise, NO 2 and NO (only in major traffic intersection). Air quality index (AQI) indicates that the ambient air can be described as poor for SPM, varied from good to very poor for CO, while NO and NO 2 are very good except at major traffic intersection where they were both poor and very poor (D-E). The results suggest that strict and appropriate vehicle emission management, industrial air pollution control coupled with close burning management of wastes should be considered in the study area to reduce the risks associated with these pollutants.© JASEM
EQA – Environmental quality , 2020
In the face of the increasing numbers and haphazard siting of mechanic workshops and the conseque... more In the face of the increasing numbers and haphazard siting of mechanic workshops and the consequent environmental pollution due to its activities, there is paucity of information in the literature on the possible genotoxic and mutagenic effects of the associated waste and the soils of these workshops. This study therefore aimed at assessing the pollution level of the soils from the automobile workshop in Lagos and the genotoxic potential of their simulated leachate using Allium cepa L. 2 kg of soil samples were collected at a depth of 0-15 cm (top soil) using soil auger from five different points at the automobile mechanic workshop in order to get a representative sample (composite sample) and transferred directly into clean, sterile containers. A control soil sample was obtained from the Botanical garden of the University of Lagos, Akoka. The physicochemical analysis of the soil was also carried out using standard methods. The samples were analysed for lead (Pb), chromium (Cr), cadmium (Cd), zinc (Zn), arsenic (As), nickel (Ni), and mercury (Hg) using inductively coupled plasma atomic emission spectroscopy (ICP-AES) after acid digestion. Aliphatic and aromatic hydrocarbons, TPH and oil and grease were determined. Leachate simulation from the soil was carried out according to the American Society for Testing and Materials. The result showed an obvious influence of automobile workshop activities on the physicochemical properties of soil as well as on the root meristem of Allium cepa. Automobile workshop soil contained significantly higher concentrations for all analysed heavy metals (Cd, As, Cu, Pb, Ni and Zn) in comparison to the uncontaminated garden soil. Cd, Cu and Pb levels were higher than specified regulatory standards. All the leachates concentrations showed one form of aberration: sticky chromosomes, C-mitosis, bridges, lagging chromosomes, binucleate, vagrant cells and micronuclei. The highest aberration occurred in 50% concentration of the treatment while the lowest occurred in the control. The aberrations observed varied with exposure time. The results of the present study showed that simulated leachates from an automobile workshop is genotoxic and mutagenic in the bioassays used in this study. The soils
Growth and ability of Senna alata in phytoremediation of soil contaminated with heavy metals, 2020
The performance and impact of Senna alata on experimental heavy metal contaminated soil were
inve... more The performance and impact of Senna alata on experimental heavy metal contaminated soil were
investigated in this study. Soils in different pots were contaminated with different levels of lead,
nickel, chromium and cadmium based on WHO limits for heavy metals. Seeds of S. alata were
planted in the contaminated soils. The plant growth was studied for 60 days. Some soil
parameters and heavy metal contents of the soil were evaluated at the beginning and at the end of
the study. The leaf area, the plant height and the number of actively growing stems decreased
with increase in the amount of each metal added to the soil. At 60 days, there was significant
reduction (P<0.05) of the heavy metals due to the growth of S. alata compared to the soil without
the plant. There was reduction in the total organic matter content and the pH of the soil, but the
moisture content of the contaminated soils generally increased due to the growth of S. alata.
There was a positive correlation (p = 0.918) between the percentage remediation and the
bioaccumulation factor, suggesting that the remediation of the heavy metals by the plant mostly
occurred through bioaccumulation. A positive correlation between the percentage reduction of
the heavy metals and the reduction of pH of the soil noticed suggests that growth of S. alata
leads to decrease in soil pH and will enhance the remediation of soil contaminated with the
heavy metals. The findings of this study show that apart from the medicinal values of S. alata, it
can be useful in remediation of heavy metal polluted soils which occurs mostly through
phytoextraction.
FUNAI Journal of Science and Technology, 2017
In this work, an investigation was made to study the phytotoxicity of photographic laboratory eff... more In this work, an investigation was made to study the phytotoxicity of photographic laboratory effluent on seed germination, seedling early growth and survival of P. glaucum and S. bicolor. The organic chemical constituents of photolab effluent and their percentage abundance were analysed using Gas Chromatography Mass Spectrophotometry. The effluent was diluted into different concentrations with distil water for this experiment (1%, 2%, 3%, 4% and 5%). The seeds of S. bicolor germinated more than the seeds of the P. glaucum in all the treatments except for 1% treated soil. The percentage survival of the seedlings of both plants decreased with increase in photolab effluent concentration. No seedlings of P. glaucum survived in soil treated 3%, 4% and 5% photolab effluents. The percentage survival of S. bicolor seedlings was significantly higher than the survival of P. glaucum seedlings (P<0.05; P<0.01). The shoot lengths and leaf areas of the plants generally decreased as the concentration of photolab effluent in the soil increased except in the 4% concentration where there was an increase. There were significant differences between the different concentration and control of the shoot lengths of the plants (P<0.05; P<0.01). The results of this study show that photographic effluent has phytotoxic effects on the plants; and that S. bicolor is more sensitive to photographic effluents pollution. Further studies should be carried out using other tests organisms to establish the toxicity of photographic processing laboratory effluents.
This study was conducted to evaluate nutritional composition and heavy metals concentration of sm... more This study was conducted to evaluate nutritional composition and heavy metals concentration of smoked and raw edible fish species from Ologe lagoon (freshwater) and Lagos lagoon (marine). The fish species from Ologe include: Chrysichthys nigrodigitatus (Catfish), Monodactylus sebae (African moony), Pomadasys jubelini (Buro), Sphyraena barracuda (Great barracuda), and Pseudotolithus elongatus (Croaker), while that of Lagos lagoon include Chrysichthys nigrodigitatus (Catfish), Caranx hippos (Crevalle jack), Liza falcipinnis (Sicklefin mullet), Pomadasys jubelini (Buro), and Monodactylus sebae (African moony). The nutritional composition ranged in the following trend moisture (43.24 -76.79 %) > carbohydrate (3.16 -63.45 %) > protein (0.80 -31.55 %) > fibre (1.07 -2.8 %) > ash (0.81 -1.88 %) > fat (0.40 -1.30 %). In this study, these fishes are generally low in fats (lean fish), and fish smoking tend to reduces their nutritional composition. Heavy metals concentration trend thus Zn (2.4 -7.75 mg/kg) > Ni (0.80 -1.925 mg/kg) > Cr (0.20 -0.550 mg/kg) > Pb (0.025 -0.50 mg/kg). In all the samples, all the metals of interest were detected except cadmium which was not found in any of the samples analysed. Pb (0.025 -0.5 mg/kg) values in the fishes were lower than the maximum standard level reported to be 0.5 mg/kg dry weight by FAO except in the raw Pomadasys jubelini where the value is 0.5mg/kg. The fresh water fishes showed higher concentration of heavy metals than marine water fishes but not statistically significant (p>0.05). Although, smoked fishes showed higher concentration of heavy metals than the raw fishes, it was only significant for zinc (p<0.05). In view of this study and the importance of fish in human diet, it is recommended that biological monitoring of fishes meant for consumption from these two water bodies be carried out regularly to ensure human safety.© JASEM http://dx.doi.org/10.4314/jasem.v20i2.7
Anthropogenic activities are major sources of phosphate and nitrates pollution in aquatic ecosyst... more Anthropogenic activities are major sources of phosphate and nitrates pollution in aquatic ecosystems. These nonpoint sources of nutrients are difficult to measure and regulate because they are derived from activities dispersed over large expanse of land and are time variable because of weather and climate changes. Toxic algal blooms, hypoxia, fish deaths, loss of biodiversity and species composition, loss of aquatic plant beds, coral reefs are parts of their effects in water bodies. Nutrient enrichment seriously impairs aquatic ecosystems usage, purposes and functions. In this study impacts of human activities on the nitrates and phosphate level of Nwaja Creek in the upper Bonny Estuary of the Niger Delta, Nigeria were studied. Samples were collected from seven sampling stations (S1 to S7) along the creek from May to July, 2015 (rainfall's peak period). Temperature, pH, dissolved oxygen (DO), nitrate and phosphate content were analyzed using standards methods and procedures. DO, Nitrates and phosphates have high variation across sampling stations and were very high when compared to other creeks surface water in Niger Delta. pH ranged between 4.16 -7.01, temperature ranged between 21.5 -30.05 o C, DO ranged between 4.50 -13.50 mg/L, phosphate ranged between 0.89 -14.91 mg/L, nitrate ranged between 0.56 -9.96 mg/L. The statistical analysis of the parameters indicates that Nwaja creek surface water is highly polluted. Its phosphate level is above FEPA permissible limits (13.50>5.0 mg/L) and nitrate is significantly same (9.96=10.0 mg/L). There is urgent need for constant monitoring and assessment of these creeks for other pollutants (physicochemical, heavy metals, hydrocarbons etc.).
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Papers by Anuoluwapo O M O S I L E O L A Jolaoso
investigated in this study. Soils in different pots were contaminated with different levels of lead,
nickel, chromium and cadmium based on WHO limits for heavy metals. Seeds of S. alata were
planted in the contaminated soils. The plant growth was studied for 60 days. Some soil
parameters and heavy metal contents of the soil were evaluated at the beginning and at the end of
the study. The leaf area, the plant height and the number of actively growing stems decreased
with increase in the amount of each metal added to the soil. At 60 days, there was significant
reduction (P<0.05) of the heavy metals due to the growth of S. alata compared to the soil without
the plant. There was reduction in the total organic matter content and the pH of the soil, but the
moisture content of the contaminated soils generally increased due to the growth of S. alata.
There was a positive correlation (p = 0.918) between the percentage remediation and the
bioaccumulation factor, suggesting that the remediation of the heavy metals by the plant mostly
occurred through bioaccumulation. A positive correlation between the percentage reduction of
the heavy metals and the reduction of pH of the soil noticed suggests that growth of S. alata
leads to decrease in soil pH and will enhance the remediation of soil contaminated with the
heavy metals. The findings of this study show that apart from the medicinal values of S. alata, it
can be useful in remediation of heavy metal polluted soils which occurs mostly through
phytoextraction.
investigated in this study. Soils in different pots were contaminated with different levels of lead,
nickel, chromium and cadmium based on WHO limits for heavy metals. Seeds of S. alata were
planted in the contaminated soils. The plant growth was studied for 60 days. Some soil
parameters and heavy metal contents of the soil were evaluated at the beginning and at the end of
the study. The leaf area, the plant height and the number of actively growing stems decreased
with increase in the amount of each metal added to the soil. At 60 days, there was significant
reduction (P<0.05) of the heavy metals due to the growth of S. alata compared to the soil without
the plant. There was reduction in the total organic matter content and the pH of the soil, but the
moisture content of the contaminated soils generally increased due to the growth of S. alata.
There was a positive correlation (p = 0.918) between the percentage remediation and the
bioaccumulation factor, suggesting that the remediation of the heavy metals by the plant mostly
occurred through bioaccumulation. A positive correlation between the percentage reduction of
the heavy metals and the reduction of pH of the soil noticed suggests that growth of S. alata
leads to decrease in soil pH and will enhance the remediation of soil contaminated with the
heavy metals. The findings of this study show that apart from the medicinal values of S. alata, it
can be useful in remediation of heavy metal polluted soils which occurs mostly through
phytoextraction.