ABSTRACT
Photocatalytic concrete is an innovative advancement in material science which enables a photocatalytic process that reduces airborne pollutants such as https://www.w3.org/1998/Math/MathML"> S O x , P M 10 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11966.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> , VOCs, and https://www.w3.org/1998/Math/MathML"> N O x https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11967.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> . This research was undertaken in order to quantify the environmental impacts (both positive and negative) of photocatalytic concrete utilizing life-cycle assessment (LCA) software. This preliminary study examined some of the environmental impacts of constructing highway noise barriers with photocatalytic concrete covers. The LCA captures the amount of https://www.w3.org/1998/Math/MathML"> N O x https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11968.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> that is broken down by the photocatalytic processes and also the https://www.w3.org/1998/Math/MathML"> N O x https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11969.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> and https://www.w3.org/1998/Math/MathML"> C O 2 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11970.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> emissions released during manufacturing. The results show that there is an overall increase in https://www.w3.org/1998/Math/MathML"> C O 2 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11971.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> produced when photocatalytic concrete is used but a lifetime net reduction in https://www.w3.org/1998/Math/MathML"> N O x https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11972.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> due to photocatalysis. Without ranking the relative importance of https://www.w3.org/1998/Math/MathML"> N O x https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11973.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> versus https://www.w3.org/1998/Math/MathML"> C O 2 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429227196/8b5c0a5d-ddea-4c88-8eea-7152f7afb008/content/eq11974.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> it is difficult to identify whether photocatalytic are preferable to traditional concrete noise barriers.
