Environmental contamination threat from the deposition of construction and demolition waste (CDW)
- Agbenyeku, Emmanuel Emem-Obong, Muzenda, Edison, Msibi, Innocent Mandla
- Authors: Agbenyeku, Emmanuel Emem-Obong , Muzenda, Edison , Msibi, Innocent Mandla
- Date: 2016
- Subjects: Construction and demolition waste , Effluent , Landfill
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/215494 , uj:21423 , Citation: Agbenyeku, E.E., Muzenda, E & Msibi, I.M. 2016. Environmental contamination threat from the deposition of construction and demolition waste (CDW).
- Description: Abstract: Growing population, industrialization and infrastructure development have resulted in enormous waste generation over the past decades. The disposal of vast amounts of waste remains a major challenge. However, in the globalized world recycling has become a main option for managing wastes while in other parts of the globe, landfilling is done due to waste handling difficulties. South Africa is one of many countries where landfilling activities is high, as roughly 75% of daily generated solid waste is disposed in landfills. This includes massive amounts of construction and demolition wastes (CDW) from reconstruction and development activities. South Africa depends on landfilling as a system of waste management which in the foreseeable future would linger till feasible recycling options are initiated. As such, the generation and seepage of leachate into soil, water reserves is probable in such dump sites due to exposure of the waste bodies to rain and run-offs. A bespoke device was used in the study to investigate the impacts of disposing CDW in open dumps paying mind to an unlined site relying on the geology of the area as worst case scenario. To generate leachate, the device was coupled with CDW in a bottom chamber and de-ionized water percolated the system from a reservoir. Arsenic, Copper and Chromium from the generated leachate effluent were analyzed by full spectral method and were compared to the South African standard of drinking water. Targeted ions were found to decrease over the testing period and it was however, clear that improper disposal of CDW could have consequential impacts on human and environmental health.
- Full Text:
- Authors: Agbenyeku, Emmanuel Emem-Obong , Muzenda, Edison , Msibi, Innocent Mandla
- Date: 2016
- Subjects: Construction and demolition waste , Effluent , Landfill
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/215494 , uj:21423 , Citation: Agbenyeku, E.E., Muzenda, E & Msibi, I.M. 2016. Environmental contamination threat from the deposition of construction and demolition waste (CDW).
- Description: Abstract: Growing population, industrialization and infrastructure development have resulted in enormous waste generation over the past decades. The disposal of vast amounts of waste remains a major challenge. However, in the globalized world recycling has become a main option for managing wastes while in other parts of the globe, landfilling is done due to waste handling difficulties. South Africa is one of many countries where landfilling activities is high, as roughly 75% of daily generated solid waste is disposed in landfills. This includes massive amounts of construction and demolition wastes (CDW) from reconstruction and development activities. South Africa depends on landfilling as a system of waste management which in the foreseeable future would linger till feasible recycling options are initiated. As such, the generation and seepage of leachate into soil, water reserves is probable in such dump sites due to exposure of the waste bodies to rain and run-offs. A bespoke device was used in the study to investigate the impacts of disposing CDW in open dumps paying mind to an unlined site relying on the geology of the area as worst case scenario. To generate leachate, the device was coupled with CDW in a bottom chamber and de-ionized water percolated the system from a reservoir. Arsenic, Copper and Chromium from the generated leachate effluent were analyzed by full spectral method and were compared to the South African standard of drinking water. Targeted ions were found to decrease over the testing period and it was however, clear that improper disposal of CDW could have consequential impacts on human and environmental health.
- Full Text:
Impacts of landfill disposal of construction and demolition waste (CDW)
- Agbenyeku, E. Emmanuel, Aigbavboa, Clinton O., Kukoyi, T. Oladayo
- Authors: Agbenyeku, E. Emmanuel , Aigbavboa, Clinton O. , Kukoyi, T. Oladayo
- Date: 2015
- Subjects: Leachate , Landfill , Construction and demolition waste
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/70169 , uj:17964 , Citation: Agbenyeku, E.E., Aigbavboa, O.C. & Kukoyi, T.O. 2015. Impacts of landfill disposal of construction and demolition waste (CDW).
- Description: Abstract: Growing population, industrialization and infrastructure development have resulted in enormous waste generation over the past decades. The disposal of vast amounts of waste remains a major challenge. However, in the globalized world recycling has become a main option for managing wastes while in other parts of the globe, landfilling is resorted to because of waste handling difficulties. South Africa is one of many countries where landfilling activities is high, as roughly 75 % of daily generated solid waste is disposed in landfills. This includes massive amounts of construction and demolition wastes (CDW) from reconstruction and development activities. South Africa depends on landfilling as a system of waste management which in the foreseeable future would linger on till feasible recycling options are initiated. Consequentially, the generation and seepage of leachate into soil, ground and surface water reserves is probable in such dump sites due to exposure of the waste bodies to rain and run-off water. A bespoke device was used in the study to investigate the impacts of disposing CDW in open dumps with mind for an unlined site relying on the geology of the area as worst case scenario. To generate leachate, the device was coupled with CDW in a bottom chamber and de-ionized water seeped through from a reservoir. Arsenic, Copper and Chromium from the generated leachate were analyzed by full spectral method on the effluent and were compared to South African standard of drinking water. Although, concentration levels of the targeted ions decreased through the test, it was clear that if CDW is not properly disposed, could contribute to consequential impacts on human and environmental health over time. Keywords Leachate, Landfill, Construction and Demolition Waste, Bespoke device.
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- Authors: Agbenyeku, E. Emmanuel , Aigbavboa, Clinton O. , Kukoyi, T. Oladayo
- Date: 2015
- Subjects: Leachate , Landfill , Construction and demolition waste
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/70169 , uj:17964 , Citation: Agbenyeku, E.E., Aigbavboa, O.C. & Kukoyi, T.O. 2015. Impacts of landfill disposal of construction and demolition waste (CDW).
- Description: Abstract: Growing population, industrialization and infrastructure development have resulted in enormous waste generation over the past decades. The disposal of vast amounts of waste remains a major challenge. However, in the globalized world recycling has become a main option for managing wastes while in other parts of the globe, landfilling is resorted to because of waste handling difficulties. South Africa is one of many countries where landfilling activities is high, as roughly 75 % of daily generated solid waste is disposed in landfills. This includes massive amounts of construction and demolition wastes (CDW) from reconstruction and development activities. South Africa depends on landfilling as a system of waste management which in the foreseeable future would linger on till feasible recycling options are initiated. Consequentially, the generation and seepage of leachate into soil, ground and surface water reserves is probable in such dump sites due to exposure of the waste bodies to rain and run-off water. A bespoke device was used in the study to investigate the impacts of disposing CDW in open dumps with mind for an unlined site relying on the geology of the area as worst case scenario. To generate leachate, the device was coupled with CDW in a bottom chamber and de-ionized water seeped through from a reservoir. Arsenic, Copper and Chromium from the generated leachate were analyzed by full spectral method on the effluent and were compared to South African standard of drinking water. Although, concentration levels of the targeted ions decreased through the test, it was clear that if CDW is not properly disposed, could contribute to consequential impacts on human and environmental health over time. Keywords Leachate, Landfill, Construction and Demolition Waste, Bespoke device.
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A holistic assessment of construction and demolition waste management in the Nigerian construction projects
- Aboginije, Ademilade, Aigbavboa, Clinton, Thwala, Wellington
- Authors: Aboginije, Ademilade , Aigbavboa, Clinton , Thwala, Wellington
- Date: 2021
- Subjects: Construction industry , Construction and demolition waste , Exploratory factor analysis
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/478597 , uj:43259 , Citation: Aboginije, A.; Aigbavboa, C.; Thwala,W. A Holistic Assessment of Construction and Demolition Waste Management in the Nigerian Construction Projects. Sustainability 2021, 13, 6241. https://doi.org/ 10.3390/su13116241
- Description: Abstract: This study provides a holistic assessment of the current waste management strategies implemented in Nigerian construction projects. The data used in this study were collected from both primary and secondary sources. The primary data were collected through survey questionnaires distributed via emails of the targeted respondents who are construction professionals in the study area of Lagos metropolis, while the secondary data were collected via the review of related literature. Out of the 200 questionnaires distributed, only 168 valid forms were retrieved. The collected data accounted for 84% of the entire survey and were suitable for the analysis. An exploratory factor analysis was conducted while the reliability of the research survey instrument was tested using Cronbach’s alpha coefficient reliability. The result indicated that the waste management strategies were clustered into three groups, comprising practical legal framework and modular construction, sustainable procurement and material optimisation, and proper construction detailing and design. In conclusion, the waste management strategies implemented in Nigeria were assessed as being “not sustainable enough”. However, it is recommended that there is an upgrading in either the approach or method of application of waste management strategies in order to ensure its sustainability.
- Full Text:
- Authors: Aboginije, Ademilade , Aigbavboa, Clinton , Thwala, Wellington
- Date: 2021
- Subjects: Construction industry , Construction and demolition waste , Exploratory factor analysis
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/478597 , uj:43259 , Citation: Aboginije, A.; Aigbavboa, C.; Thwala,W. A Holistic Assessment of Construction and Demolition Waste Management in the Nigerian Construction Projects. Sustainability 2021, 13, 6241. https://doi.org/ 10.3390/su13116241
- Description: Abstract: This study provides a holistic assessment of the current waste management strategies implemented in Nigerian construction projects. The data used in this study were collected from both primary and secondary sources. The primary data were collected through survey questionnaires distributed via emails of the targeted respondents who are construction professionals in the study area of Lagos metropolis, while the secondary data were collected via the review of related literature. Out of the 200 questionnaires distributed, only 168 valid forms were retrieved. The collected data accounted for 84% of the entire survey and were suitable for the analysis. An exploratory factor analysis was conducted while the reliability of the research survey instrument was tested using Cronbach’s alpha coefficient reliability. The result indicated that the waste management strategies were clustered into three groups, comprising practical legal framework and modular construction, sustainable procurement and material optimisation, and proper construction detailing and design. In conclusion, the waste management strategies implemented in Nigeria were assessed as being “not sustainable enough”. However, it is recommended that there is an upgrading in either the approach or method of application of waste management strategies in order to ensure its sustainability.
- Full Text:
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