Environmental and economic impact assessment of construction and demolition waste disposal using system dynamics |
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| Institution: | 1. School of Economics and Management, Southwest Jiaotong University, Sichuan 610031, PR China;2. College of Civil Engineering, Shenzhen University, Shenzhen, Guangdong 518060, PR China;1. Division of Built Environment and Civil Engineering, School of Environment and Technology, University of Brighton, Brighton, BN2 4GJ, UK;2. Department of Civil Engineering, University of Nottingham Ningbo China, 199 Taikang East Rd., Ningbo, 315100, China;3. Department of Architecture and Built Environment, University of Nottingham Ningbo China, 199 Taikang East Rd., Ningbo, 315100, China;4. School of Civil Engineering, Faculty of Engineering, University of Leeds, Leeds, LS2 9JT, UK;5. Division of Built Environment, School of Environment and Technology, University of Brighton, Brighton, BN2 4GJ, UK;1. Departament of Mechanical Engineering & Construction, Universitat Jaume I, Castellón, Spain;2. CSERGE, School of Environmental Sciences, University of East Anglia, Norwich NR4 7 TJ, UK;1. Department of Civil Engineering, Bulent Ecevit University, 67100, Zonguldak, Turkey;2. Department of Civil Engineering, Akdeniz University, 07058, Antalya, Turkey;1. Department of Construction Management and Real Estate, Shenzhen University, Shenzhen, Guangdong, China;2. School of Computing, Engineering and Mathematics and Institute for Infrastructure Engineering, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia |
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| Abstract: | Construction and demolition wastes (CDW) have increasingly serious problems in environmental, social, and economic realms. There is no coherent framework for utilization of these wastes which are disposed both legally and illegally. This harms the environment, contributes to the increase of energy consumption, and depletes finite landfills resources. The aim of this paper is to evaluate the impacts of two alternatives for the management of CDW, recycling and disposing. The evaluation is carried out through developing a dynamic model with aid STELLA software by conducting the following steps: (1) quantifying the total cost incurred to mitigate the impacts of CDW landfills and uncollected waste on the environment and human health; (2) quantifying the total avoided emissions and saved energy by recycling waste; (3) estimating total external cost saved by recycling waste and; (4) providing a decision support tool that helps in re-thinking about waste disposal. The proposed evaluation methodology allows activating the stringent regulations that restrict waste disposal and developing incentives to encourage constructors to recycle their wastes. The research findings show that recycling CDW leads to significant reductions in emissions, energy use, global warming potential (GWP), and conserves landfills space when compared to disposal of wastes in landfills. Furthermore, the cost of mitigating the impact of disposal is extremely high. Therefore, it is necessary to recycle construction and demolition wastes. |
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| Keywords: | Construction and demolition wastes (CDW) Environmental and economic impact assessment Pollutant emissions Waste recycling Global warming potential (GWP) System dynamics modeling |
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