Kim Hyeok-Jung, Hong Kinam
Industry Academic Cooperation Foundation, Hankyong National University, 327 Jangang-ro, Anseong 17579, Republic of Korea.
Department of Civil Engineering, Chungbuk National University, 1 Chungdae-ro, Seowon-Gu, Cheongju 28644, Republic of Korea.
Materials (Basel). 2023 Aug 8;16(16):5512. doi: 10.3390/ma16165512.
Fine dust, recently classified as a carcinogen, has raised concerns about the health effects of air pollution. Vehicle emissions, particularly nitrogen oxide (NO), contribute to ultrafine dust formation as a fine dust precursor. A photocatalyst, such as titanium dioxide (TiO), 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 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 reduction performance of the permeable concrete treated with TiO photocatalyst was assessed using ISO standard and tank chambers. NO reduction efficiency of up to 77.5% was confirmed in the permeable concrete specimen with TiO content of 7.5%. Nitrate concentration measurements indirectly confirmed photolysis of nitrogen oxide. Incorporating TiO in construction materials such as roads and sidewalks can improve the atmospheric environment for pedestrians near roads by reducing NO levels through photocatalysis.
细粉尘最近被列为致癌物，这引发了人们对空气污染对健康影响的担忧。车辆排放物，尤其是氮氧化物（NO），作为细粉尘的前体，会导致超细粉尘的形成。光催化剂，如二氧化钛（TiO），是一种在光照下会引发催化反应的材料，具有分解污染物等特殊特性，并且可以永久使用。本研究旨在通过开发经光催化处理的环保透水混凝土来研究NO减排性能，以减少道路移动污染源产生的细粉尘。制备了含有活性黄土和沸石外加剂的透水混凝土试件，并进行了力学和耐久性试验。所有试件，包括对照组（CTRL）和外加剂试件，均符合道路路面质量标准SPS-F-KSPIC-001-2006。防滑性和渗透系数也符合标准，而冻融评估标准仅CTRL和A1Z1试件满足。采用ISO标准和试验箱对经TiO光催化剂处理的透水混凝土的NO减排性能进行了评估。在TiO含量为7.5%的透水混凝土试件中，NO减排效率高达77.5%得到了证实。硝酸盐浓度测量间接证实了氮氧化物的光解。在道路和人行道等建筑材料中掺入TiO，可以通过光催化降低NO水平，改善道路附近行人的大气环境。
