PMID- 32247975
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20200512
LR  - 20200518
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 724
DP  - 2020 Jul 1
TI  - Influence of TiO(2)-based photocatalytic coating road on traffic-related NO(x) 
      pollutants in urban street canyon by CFD modeling.
PG  - 138059
LID - S0048-9697(20)31572-2 [pii]
LID - 10.1016/j.scitotenv.2020.138059 [doi]
AB  - The use of titanium dioxide (TiO(2)) photocatalytic nanoparticles as road coating 
      to trap and decompose air pollutants provides a promising technology to mitigate 
      the harmful effects of vehicle emissions. However, there are few studies on 
      computational fluid dynamics (CFD) simulations of the effect of NOx 
      photocatalytic oxidation in street canyon with TiO(2) nanoparticles as pavement 
      coating. This study develop a CFD model with photocatalytic oxidation (PCO) 
      reaction implemented for numerical simulation of NO(x) abatement in an urban 
      street canyon with TiO(2) coating, considering the effects of relative humidity 
      (RH) (10-90%), and irradiance (10-40W ⋅ m(-2)). Results show that TiO(2) coating 
      road can effectively reduce nitrogen oxide (NO(x)) concentration in the street 
      canyon. The average nitric oxide (NO) and nitrogen dioxide (NO(2)) concentrations 
      in street canyon with TiO(2) coating road were reduced by 3.70% and 4.31%, 
      respectively, comparing with street canyon without TiO(2) coating. The irradiance 
      and relative humidity had great effect on PCO reaction in street canyon with 
      TiO(2) coating road. When the irradiance increased from 10W ⋅ m(-2) to 
      40W ⋅ m(-2)(,) average NO conversion rose from 1.35% to 3.70%, and average NO(2) 
      conversion rose from 2.43% to 4.31%. The average conversion of NO and NO(2) 
      decreased from 5.11% to 2.54% and from 5.60% to 3.25%, respectively, when the 
      relative humidity is varied from 10% to 90%. Results are useful to transport 
      planners and road engineers who need to reduce NOx concentrations in urban 
      streets travelled by fossil fuel-powered vehicles. Method of the study can be 
      considered by future research faced with different pavement construction and 
      traffic environment.
CI  - Copyright (c) 2020 Elsevier B.V. All rights reserved.
FAU - Xie, Xiaomin
AU  - Xie X
AD  - Key Laboratory for Power machinery and Engineering of M. O. E., Shanghai Jiao 
      Tong University, No. 800, Dongchuan Road, 200240 Shanghai, PR China. Electronic 
      address: xiexiaomin@sjtu.edu.cn.
FAU - Hao, Chenrui
AU  - Hao C
AD  - Key Laboratory for Power machinery and Engineering of M. O. E., Shanghai Jiao 
      Tong University, No. 800, Dongchuan Road, 200240 Shanghai, PR China.
FAU - Huang, Yue
AU  - Huang Y
AD  - Institute for Transport Studies, University of Leeds, 34-40 University Road, 
      Leeds LS2 9JT, UK.
FAU - Huang, Zhen
AU  - Huang Z
AD  - Key Laboratory for Power machinery and Engineering of M. O. E., Shanghai Jiao 
      Tong University, No. 800, Dongchuan Road, 200240 Shanghai, PR China.
LA  - eng
PT  - Journal Article
DEP - 20200319
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
OTO - NOTNLM
OT  - Computational fluid dynamics (CFD) simulation
OT  - NO(x) concentration
OT  - Photocatalytic oxidation (PCO)
OT  - Street canyon
OT  - TiO(2) coating road
COIS- Declaration of competing interest The authors declare no competing financial 
      interests.
EDAT- 2020/04/06 06:00
MHDA- 2020/04/06 06:01
CRDT- 2020/04/06 06:00
PHST- 2020/01/02 00:00 [received]
PHST- 2020/03/02 00:00 [revised]
PHST- 2020/03/18 00:00 [accepted]
PHST- 2020/04/06 06:00 [pubmed]
PHST- 2020/04/06 06:01 [medline]
PHST- 2020/04/06 06:00 [entrez]
AID - S0048-9697(20)31572-2 [pii]
AID - 10.1016/j.scitotenv.2020.138059 [doi]
PST - ppublish
SO  - Sci Total Environ. 2020 Jul 1;724:138059. doi: 10.1016/j.scitotenv.2020.138059. 
      Epub 2020 Mar 19.