NOx removal efficiency of urban photocatalytic pavements at pilot scale

Assessment of urban air pollution related to potential nanoparticle emission from photocatalytic pavements

“…This study was a part of a full-scale experiment which purpose was to evaluate photocatalytic activity, durability, environmental benefits and impacts of photocatalytic technology on real scale (Cordero et al, 2020;Jim� enez-Relinque et al, 2019;Nevshupa et al, 2020). A photocatalytic coating was chosen out of various commercial products upon an exhaustive analysis of their properties on both laboratory and pilot-plant technical scale using demonstration photocatalytic platforms (Cordero et al, 2020). The chosen material was a water-base suspension of photocatalytic nanoparticles intended for application onto the existing pavements and sidewalks by spraying manually with a dose 0.07-0.1 l/m 2 .…”

From analysis to decision: Revision of a multifactorial model for the in situ assessment of NOx abatement effectiveness of photocatalytic pavements

“…1) following the instructions of the manufacturers. More details on the characteristics and the layout of the BoP can be found in [10]. While the first pilot scale platform was situated at a close distance to the M-30 Madrid city highway in a highly stressed urban environment, the second one was located in a semi-urban environment with a considerably lower contamination level and notably higher relative humidity due to the proximity of the Jarama river and wetlands (Fig.…”

New Holistic Conceptual Framework for the Assessment of the Performance of Photocatalytic Pavement

“…After proper calibration, these sensors were placed on the ground level on different slabs for the continuous monitoring of the NO and NO 2 concentrations. The calibration procedure and detailed results are described elsewhere (Cordero et al, 2020). To measure the abatement effectiveness of the VOCs under outdoor conditions, portable photoionizers were used ( Figure 3A).…”

“…Given the enormous volume of experimental data, only the findings relevant to establishing a holistic conceptual approach for the assessment of the photocatalytic pavement performance and corresponding quantitative conformity criteria are summarized in this paper. Additional data can be found in the literature (Jiménez-Relinque et al, 2019Cordero et al, 2020;Hingorani et al, 2020;Nevshupa et al, 2020b) or on the project website (www. lifephotoscaling.eu).…”

“…The results of several laboratory studies proved that photocatalysis effectively deactivates and mineralizes most of the harmful contaminants such as NO x (Cassar, 2004;Chen and Poon, 2009a,b;Bengtsson and Castellote, 2010;Folli et al, 2010;Lucas et al, 2013;Bloh et al, 2014;Mendoza et al, 2015;Mills and Elouali, 2015;Hernández Rodríguez et al, 2016;Mothes et al, 2016;Jimenez-Relinque and Castellote, 2019b;Chen et al, 2020). Furthermore, this technology has already been tested on the pilot and real scales in several projects; the results indicate photocatalytic effectiveness (Beeldens et al, 2007;Maggos et al, 2007Maggos et al, , 2008Chen and Chu, 2011;Boonen and Beeldens, 2013;Suarez et al, 2014;Folli et al, 2015;Gallus et al, 2015;George et al, 2016;Jiménez-Relinque et al, 2019;Cordero et al, 2020). However, the information obtained in these studies is not conclusive for evaluating the overall performances of photocatalytic pavements because other material characteristics relevant to their functionality, such as the durability, or potential undesirable secondary effects were not assessed.…”