NO x precipitation and valorization driven by photocatalysis and adsorption over red soil.

Autor: Xu X; College of Resources and Environment, Southwest University, Beibei, Chongqing, 400715, China., Shrestha RK; College of Resources and Environment, Southwest University, Beibei, Chongqing, 400715, China; Lamjung Campus, Institute of Agriculture and Animal Science, Tribhuvan University, Kathmandu, Nepal., Shu J; College of Resources and Environment, Southwest University, Beibei, Chongqing, 400715, China., Cheng H; College of Resources and Environment, Southwest University, Beibei, Chongqing, 400715, China., Yang G; Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401121, China., Ni J; College of Resources and Environment, Southwest University, Beibei, Chongqing, 400715, China; National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in Three Gorges Reservoir Region, Chongqing 400716, China., Hu M; Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401121, China; Chongqing Institute for Brain and Intelligence, Guangyang Bay Laboratory, Chongqing 400064, China., Li B; Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401121, China., Zheng P; Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401121, China., Zeng H; Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401121, China; Chongqing Institute for Brain and Intelligence, Guangyang Bay Laboratory, Chongqing 400064, China., Ni C; College of Resources and Environment, Southwest University, Beibei, Chongqing, 400715, China; National Base of International S&T Collaboration on Water Environmental Monitoring and Simulation in Three Gorges Reservoir Region, Chongqing 400716, China. Electronic address: nichengsheg@swu.edu.cn.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Nov 01; Vol. 949, pp. 174975. Date of Electronic Publication: 2024 Jul 23.
DOI: 10.1016/j.scitotenv.2024.174975
Abstrakt: Nitrogen oxides (NO x ) emissions can cause air pollution that is harmful to human health, even producing serious ecological problems. Whether it is diluted in the air or not, the management and valorization of NO x from industrial emissions have been constrained by technology and finance. This study shows that red soil can be used as a photocatalyst to convert NO x into soil nitrate nitrogen (NO 3 - -N) in the soil. The addition of zinc oxide (ZnO) and titanium dioxide (TiO 2 ) onto the soil surface improves the photocatalytic precipitation efficiency of 1 ppm NO, approaching a removal efficiency of 77 % under ultraviolet (UV) light. The efficiency of red soil in precipitating NO x through adsorption exceeded that of photocatalysis at 100 ppm NO x (e.g. 16.02 % versus 7.70 % in 0.1-mm soil). Pot experiment reveals that the precipitated NO 3 - -N promoted biomass of water spinach (Ipomoea aquatica Forsk). Additionally, adding ZnO or TiO 2 also affects mineral nutrition. This demonstration of converting air pollutants into available nitrogen (N) for plant growth not only provides a new perspective on treatment and valorization for NO x but also sheds light on the transport of N in the air-soil-plant path.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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