Evaluation of Nitrogen Oxide Reduction Performance in Permeable Concrete Surfaces Treated with a TiO<sub>2</sub> Photocatalyst
Fine dust, recently classified as a carcinogen, has raised concerns about the health effects of air pollution. Vehicle emissions, particularly nitrogen oxide (NO<sub>x</sub>), contribute to ultrafine dust formation as a fine dust precursor. A photocatalyst, such as titanium dioxide (TiO&...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-08-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/16/5512 |
| _version_ | 1797584011257708544 |
|---|---|
| author | Hyeok-jung Kim Kinam Hong |
| author_facet | Hyeok-jung Kim Kinam Hong |
| author_sort | Hyeok-jung Kim |
| collection | DOAJ |
| description | Fine dust, recently classified as a carcinogen, has raised concerns about the health effects of air pollution. Vehicle emissions, particularly nitrogen oxide (NO<sub>x</sub>), contribute to ultrafine dust formation as a fine dust precursor. A photocatalyst, such as titanium dioxide (TiO<sub>2</sub>), is a material that causes a catalytic reaction when exposed to light, has exceptional characteristics such as decomposition of pollutants, and can be used permanently. This study aimed to investigate NO<sub>x</sub> reduction performance by developing ecofriendly permeable concrete with photocatalytic treatment to reduce fine dust generated from road mobile pollution sources. Permeable concrete specimens containing an activated loess and zeolite admixture were prepared and subjected to mechanical and durability tests. All specimens, including the control (CTRL) and admixture, met quality standard SPS-F-KSPIC-001-2006 for road pavement. Slip resistance and permeability coefficient also satisfied the standards, while freeze–thaw evaluation criteria were met only by CTRL and A1Z1 specimens. NO<sub>x</sub> reduction performance of the permeable concrete treated with TiO<sub>2</sub> photocatalyst was assessed using ISO standard and tank chambers. NO<sub>x</sub> reduction efficiency of up to 77.5% was confirmed in the permeable concrete specimen with TiO<sub>2</sub> content of 7.5%. Nitrate concentration measurements indirectly confirmed photolysis of nitrogen oxide. Incorporating TiO<sub>2</sub> in construction materials such as roads and sidewalks can improve the atmospheric environment for pedestrians near roads by reducing NO<sub>x</sub> levels through photocatalysis. |
| first_indexed | 2024-03-10T23:46:12Z |
| format | Article |
| id | doaj.art-17999cc97f9c4db3bbf8596b80f2f6f2 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:46:12Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-17999cc97f9c4db3bbf8596b80f2f6f22023-11-19T01:58:33ZengMDPI AGMaterials1996-19442023-08-011616551210.3390/ma16165512Evaluation of Nitrogen Oxide Reduction Performance in Permeable Concrete Surfaces Treated with a TiO<sub>2</sub> PhotocatalystHyeok-jung Kim0Kinam Hong1Industry Academic Cooperation Foundation, Hankyong National University, 327 Jangang-ro, Anseong 17579, Republic of KoreaDepartment of Civil Engineering, Chungbuk National University, 1 Chungdae-ro, Seowon-Gu, Cheongju 28644, Republic of KoreaFine dust, recently classified as a carcinogen, has raised concerns about the health effects of air pollution. Vehicle emissions, particularly nitrogen oxide (NO<sub>x</sub>), contribute to ultrafine dust formation as a fine dust precursor. A photocatalyst, such as titanium dioxide (TiO<sub>2</sub>), is a material that causes a catalytic reaction when exposed to light, has exceptional characteristics such as decomposition of pollutants, and can be used permanently. This study aimed to investigate NO<sub>x</sub> reduction performance by developing ecofriendly permeable concrete with photocatalytic treatment to reduce fine dust generated from road mobile pollution sources. Permeable concrete specimens containing an activated loess and zeolite admixture were prepared and subjected to mechanical and durability tests. All specimens, including the control (CTRL) and admixture, met quality standard SPS-F-KSPIC-001-2006 for road pavement. Slip resistance and permeability coefficient also satisfied the standards, while freeze–thaw evaluation criteria were met only by CTRL and A1Z1 specimens. NO<sub>x</sub> reduction performance of the permeable concrete treated with TiO<sub>2</sub> photocatalyst was assessed using ISO standard and tank chambers. NO<sub>x</sub> reduction efficiency of up to 77.5% was confirmed in the permeable concrete specimen with TiO<sub>2</sub> content of 7.5%. Nitrate concentration measurements indirectly confirmed photolysis of nitrogen oxide. Incorporating TiO<sub>2</sub> in construction materials such as roads and sidewalks can improve the atmospheric environment for pedestrians near roads by reducing NO<sub>x</sub> levels through photocatalysis.https://www.mdpi.com/1996-1944/16/16/5512ecofriendly permeable concretephotocatalysisfine dust precursorair pollutant degradationnitrate |
| spellingShingle | Hyeok-jung Kim Kinam Hong Evaluation of Nitrogen Oxide Reduction Performance in Permeable Concrete Surfaces Treated with a TiO<sub>2</sub> Photocatalyst Materials ecofriendly permeable concrete photocatalysis fine dust precursor air pollutant degradation nitrate |
| title | Evaluation of Nitrogen Oxide Reduction Performance in Permeable Concrete Surfaces Treated with a TiO<sub>2</sub> Photocatalyst |
| title_full | Evaluation of Nitrogen Oxide Reduction Performance in Permeable Concrete Surfaces Treated with a TiO<sub>2</sub> Photocatalyst |
| title_fullStr | Evaluation of Nitrogen Oxide Reduction Performance in Permeable Concrete Surfaces Treated with a TiO<sub>2</sub> Photocatalyst |
| title_full_unstemmed | Evaluation of Nitrogen Oxide Reduction Performance in Permeable Concrete Surfaces Treated with a TiO<sub>2</sub> Photocatalyst |
| title_short | Evaluation of Nitrogen Oxide Reduction Performance in Permeable Concrete Surfaces Treated with a TiO<sub>2</sub> Photocatalyst |
| title_sort | evaluation of nitrogen oxide reduction performance in permeable concrete surfaces treated with a tio sub 2 sub photocatalyst |
| topic | ecofriendly permeable concrete photocatalysis fine dust precursor air pollutant degradation nitrate |
| url | https://www.mdpi.com/1996-1944/16/16/5512 |
| work_keys_str_mv | AT hyeokjungkim evaluationofnitrogenoxidereductionperformanceinpermeableconcretesurfacestreatedwithatiosub2subphotocatalyst AT kinamhong evaluationofnitrogenoxidereductionperformanceinpermeableconcretesurfacestreatedwithatiosub2subphotocatalyst |