ADEPOJU TOSIN - Academia.edu (original) (raw)

Papers by ADEPOJU TOSIN

International Journal of Engineering Research in Africa, 2018

Waste management has been one of the greatest of Nigeria. In this study production of carbon blac... more Waste management has been one of the greatest of Nigeria. In this study production of carbon black was carried out by recycling of waste polyethylene water sachet. Optimization of carbon black production was also done by varying factors that affects its production using response surface methodology. Box Behnken design was used to generate a total 17 experimental runs, which were design to study the effects of reactor size, initial fuel volume and mesh size on the carbon black production. A quadratic regression model was obtained for the production of carbon black with highest yield of 0.84g at optimal condition reactor volume of 2500 cm3, mesh area of 0.01 cm2, and initial fuel volume of 0.01 liters. The prediction of the model was verified using optimal condition which was applied to three independent replicates and the average carbon black yield obtained was 0.80 g, which was well within the estimated value of the model equation. The result obtained could be scaled up to pilot pro...

Environmental Quality Management, 2018

Ambient air pollution by vehicular emissions is underestimated, especially in the major cities of... more Ambient air pollution by vehicular emissions is underestimated, especially in the major cities of Nigeria. The buildup of the emissions in the atmosphere is a major health concern. This study estimated the emissions of gaseous criteria air pollutants (CAPs) from the road transport system in the Lagos metropolis from the year 2004 to 2007. The study also determined the ground-level concentrations of these pollutants for the years under review. Estimation of the emission rates of all types of vehicles was performed using an emission factor approach, while the ground-level concentrations of the CAPs were determined using the Industrial Source Complex Short Term 3 view model. The results showed that the mean concentrations of carbon monoxide in the ambient airwere 26,741.12, 31,675.95, 54,515.48, and 72,388.09 micrograms per cubic meter (𝜇g/m3) for years 2004, 2005, 2006, and 2007, respectively, while the estimated concentrations for oxides of nitrogen were 1,377.91 𝜇g/m3 for year 2004, and 1,620.76, 2,897.33, and 3,839.68 𝜇g/m3, respectively, for the years 2005, 2006, and 2007. The estimated concentrations of sulfur dioxide during the study period were 51,354.16, 57,244.76, 113,083.26, and 136,332.01 𝜇g/m3 for 2004, 2005, 2006, and 2007, respectively. For volatile organic compounds, the estimated concentrations were 3,839.68, 6,839.65, 7,067.62, and 8,431.35 𝜇g/m3 for years 2004, 2005, 2006, and 2007, respectively. The results also show that the maximum ground-level concentrations were highest along the roadside, and the average CAPs concentrations and cumulative exposure concentrations that were estimated throughout the study period are a major health concern, as these concentrations are several times higher than international limits.

Waste Management has been one of the greatest problems in Nigeria. In this study, production of c... more Waste Management has been one of the greatest problems in Nigeria. In this study,
production of carbon black was carried out by recycling of waste polyethylene water sachet.
Optimization of carbon black production was also done by varying factors that affects its production
using response surface methodology. Box Behnken design was used to generate a total of
17 experimental runs, to study the effects of reactor size, initial fuel volume and mesh size on the
carbon black production. A quadratic regression model was obtained for the production of carbon
black with highest yield of 0.84 g at optimal condition reactor volume of 2500 cm3, mesh area of
0.01 cm2, and initial fuel volume of 0.01 liters. The prediction of the model was verified using
optimal condition which was applied to three independent replicates and the average carbon black
yield obtained was 0.80 g, which was well within the estimated value of the model equation. The
result obtained could be scaled up to pilot production.

World attention has been drawn to the climate change as a result of global warming. Carbon dioxid... more World attention has been drawn to the climate change as a result of global warming. Carbon dioxide (CO2) is a greenhouse gas contributing 9-26 % to global warming. Hence this study focused on estimating CO2 emission from road transport system in Nigeria from 2004 – 2007. Inventory of all the automobile on the roads of the selected states in Nigeria was taken for the years under review. CO2 emission from this automobile was estimated using emission factor approach. The result showed Lagos state contributed highest total emission of CO2 with 116007706.2 ton/annum in the years under review while Cross River State contributed the lowest emission of 1170712.9 ton/annum. Also, motor cars contributed the highest emission of CO2 of 6720036.462 ton/annum to the ambient environment in the years under review while Lorries contributed lowest emission of 927541.18 ton/annum. The work provides an insight into the contribution of road transport system into the ambient level of CO2. The result from this work will help to put in proper legislation in reducing the emission of these pollutants.

Ambient air pollution by vehicular emissions is underestimated, especially in the major cities of... more Ambient air pollution by vehicular emissions is underestimated, especially in the major cities of
Nigeria. The buildup of the emissions in the atmosphere is a major health concern. This study estimated
the emissions of gaseous criteria air pollutants (CAPs) from the road transport system in
the Lagos metropolis from the year 2004 to 2007. The study also determined the ground-level
concentrations of these pollutants for the years under review. Estimation of the emission rates
of all types of vehicles was performed using an emission factor approach, while the ground-level
concentrations of the CAPs were determined using the Industrial Source Complex Short Term 3
view model. The results showed that the mean concentrations of carbon monoxide in the ambient
airwere 26,741.12, 31,675.95, 54,515.48, and 72,388.09 micrograms per cubic meter (𝜇g/m3) for
years 2004, 2005, 2006, and 2007, respectively, while the estimated concentrations for oxides of
nitrogen were 1,377.91 𝜇g/m3 for year 2004, and 1,620.76, 2,897.33, and 3,839.68 𝜇g/m3, respectively,
for the years 2005, 2006, and 2007. The estimated concentrations of sulfur dioxide during
the study period were 51,354.16, 57,244.76, 113,083.26, and 136,332.01 𝜇g/m3 for 2004, 2005,
2006, and 2007, respectively. For volatile organic compounds, the estimated concentrations were
3,839.68, 6,839.65, 7,067.62, and 8,431.35 𝜇g/m3 for years 2004, 2005, 2006, and 2007, respectively.
The results also show that the maximum ground-level concentrations were highest along
the roadside, and the average CAPs concentrations and cumulative exposure concentrations that
were estimated throughout the study period are a major health concern, as these concentrations
are several times higher than international limits.

International Journal of Engineering Research in Africa, 2018

Waste management has been one of the greatest of Nigeria. In this study production of carbon blac... more Waste management has been one of the greatest of Nigeria. In this study production of carbon black was carried out by recycling of waste polyethylene water sachet. Optimization of carbon black production was also done by varying factors that affects its production using response surface methodology. Box Behnken design was used to generate a total 17 experimental runs, which were design to study the effects of reactor size, initial fuel volume and mesh size on the carbon black production. A quadratic regression model was obtained for the production of carbon black with highest yield of 0.84g at optimal condition reactor volume of 2500 cm3, mesh area of 0.01 cm2, and initial fuel volume of 0.01 liters. The prediction of the model was verified using optimal condition which was applied to three independent replicates and the average carbon black yield obtained was 0.80 g, which was well within the estimated value of the model equation. The result obtained could be scaled up to pilot pro...

Environmental Quality Management, 2018

Ambient air pollution by vehicular emissions is underestimated, especially in the major cities of... more Ambient air pollution by vehicular emissions is underestimated, especially in the major cities of Nigeria. The buildup of the emissions in the atmosphere is a major health concern. This study estimated the emissions of gaseous criteria air pollutants (CAPs) from the road transport system in the Lagos metropolis from the year 2004 to 2007. The study also determined the ground-level concentrations of these pollutants for the years under review. Estimation of the emission rates of all types of vehicles was performed using an emission factor approach, while the ground-level concentrations of the CAPs were determined using the Industrial Source Complex Short Term 3 view model. The results showed that the mean concentrations of carbon monoxide in the ambient airwere 26,741.12, 31,675.95, 54,515.48, and 72,388.09 micrograms per cubic meter (𝜇g/m3) for years 2004, 2005, 2006, and 2007, respectively, while the estimated concentrations for oxides of nitrogen were 1,377.91 𝜇g/m3 for year 2004, and 1,620.76, 2,897.33, and 3,839.68 𝜇g/m3, respectively, for the years 2005, 2006, and 2007. The estimated concentrations of sulfur dioxide during the study period were 51,354.16, 57,244.76, 113,083.26, and 136,332.01 𝜇g/m3 for 2004, 2005, 2006, and 2007, respectively. For volatile organic compounds, the estimated concentrations were 3,839.68, 6,839.65, 7,067.62, and 8,431.35 𝜇g/m3 for years 2004, 2005, 2006, and 2007, respectively. The results also show that the maximum ground-level concentrations were highest along the roadside, and the average CAPs concentrations and cumulative exposure concentrations that were estimated throughout the study period are a major health concern, as these concentrations are several times higher than international limits.

Waste Management has been one of the greatest problems in Nigeria. In this study, production of c... more Waste Management has been one of the greatest problems in Nigeria. In this study,
production of carbon black was carried out by recycling of waste polyethylene water sachet.
Optimization of carbon black production was also done by varying factors that affects its production
using response surface methodology. Box Behnken design was used to generate a total of
17 experimental runs, to study the effects of reactor size, initial fuel volume and mesh size on the
carbon black production. A quadratic regression model was obtained for the production of carbon
black with highest yield of 0.84 g at optimal condition reactor volume of 2500 cm3, mesh area of
0.01 cm2, and initial fuel volume of 0.01 liters. The prediction of the model was verified using
optimal condition which was applied to three independent replicates and the average carbon black
yield obtained was 0.80 g, which was well within the estimated value of the model equation. The
result obtained could be scaled up to pilot production.

World attention has been drawn to the climate change as a result of global warming. Carbon dioxid... more World attention has been drawn to the climate change as a result of global warming. Carbon dioxide (CO2) is a greenhouse gas contributing 9-26 % to global warming. Hence this study focused on estimating CO2 emission from road transport system in Nigeria from 2004 – 2007. Inventory of all the automobile on the roads of the selected states in Nigeria was taken for the years under review. CO2 emission from this automobile was estimated using emission factor approach. The result showed Lagos state contributed highest total emission of CO2 with 116007706.2 ton/annum in the years under review while Cross River State contributed the lowest emission of 1170712.9 ton/annum. Also, motor cars contributed the highest emission of CO2 of 6720036.462 ton/annum to the ambient environment in the years under review while Lorries contributed lowest emission of 927541.18 ton/annum. The work provides an insight into the contribution of road transport system into the ambient level of CO2. The result from this work will help to put in proper legislation in reducing the emission of these pollutants.

Ambient air pollution by vehicular emissions is underestimated, especially in the major cities of... more Ambient air pollution by vehicular emissions is underestimated, especially in the major cities of
Nigeria. The buildup of the emissions in the atmosphere is a major health concern. This study estimated
the emissions of gaseous criteria air pollutants (CAPs) from the road transport system in
the Lagos metropolis from the year 2004 to 2007. The study also determined the ground-level
concentrations of these pollutants for the years under review. Estimation of the emission rates
of all types of vehicles was performed using an emission factor approach, while the ground-level
concentrations of the CAPs were determined using the Industrial Source Complex Short Term 3
view model. The results showed that the mean concentrations of carbon monoxide in the ambient
airwere 26,741.12, 31,675.95, 54,515.48, and 72,388.09 micrograms per cubic meter (𝜇g/m3) for
years 2004, 2005, 2006, and 2007, respectively, while the estimated concentrations for oxides of
nitrogen were 1,377.91 𝜇g/m3 for year 2004, and 1,620.76, 2,897.33, and 3,839.68 𝜇g/m3, respectively,
for the years 2005, 2006, and 2007. The estimated concentrations of sulfur dioxide during
the study period were 51,354.16, 57,244.76, 113,083.26, and 136,332.01 𝜇g/m3 for 2004, 2005,
2006, and 2007, respectively. For volatile organic compounds, the estimated concentrations were
3,839.68, 6,839.65, 7,067.62, and 8,431.35 𝜇g/m3 for years 2004, 2005, 2006, and 2007, respectively.
The results also show that the maximum ground-level concentrations were highest along
the roadside, and the average CAPs concentrations and cumulative exposure concentrations that
were estimated throughout the study period are a major health concern, as these concentrations
are several times higher than international limits.