[Analysis of Ozone Pollution and Precursor Control Strategies in the Pearl River Delta During Summer and Autumn Transition Season].

Q2 Environmental Science
Qing-Qing Yu, Wei-Qiang Yang, Cheng-Lei Pei, Xin-Ming Wang
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引用次数: 0

Abstract

To analyze the causes of ozone pollution in the Pearl River Delta (PRD) Region during the summer and autumn transition seasons, a case study was carried out in Guangzhou, which is located in the center of the PRD Region, to analyze the ozone photochemical production and destruction pathways as well as emission reduction scenarios using a box model based on comprehensive observation. The results showed that the stagnant meteorological conditions and high temperature during the observation period were suitable for the photochemical production of ozone, which led to widespread and prolonged ozone pollution. Aromatic hydrocarbons (AHs) contributed the most to the ozone formation potential (OFP), and m/p-xylene, toluene, and o-xylene were the major three VOC species contributing to the OFP. Box model analysis revealed that the averaged net O3 production rate during the polluted period was 23.2×10-9 h-1 and the peak reached 39.2×10-9 h-1. The HO2·+NO and NO2+·OH reaction pathways contributed the most to the local photochemical ozone production (51.2%) and destruction (47.0%), respectively. Observed ozone concentration was primarily controlled by both the local photochemical O3 production and the export-dominated transport. The RIR and EKMA analyses showed that O3 formation in Guangzhou during the summer-autumn transition seasons was mainly a VOC-limited regime and AHs showed the greatest sensitivity to O3 production. Toluene, m/p-xylene, o-xylene, n-butane, and propylene were the five key components affecting O3 generation. The analysis of reduction scenarios showed that reducing anthropogenic VOC emissions was the most favorable way to reduce O3 concentrations; however, if NOx emission was controlled after reducing VOCs, the O3 concentration would rebound in a short time. Our results suggested that the synergistic reduction of VOCs and NOx while mainly focusing on VOCs alleviation should be implemented to continuously reduce ozone concentrations in the future.

[珠江三角洲夏秋过渡季节臭氧污染及前体物质控制策略分析]。
为分析珠江三角洲(PRD)地区夏秋过渡季节臭氧污染的成因,本研究以位于珠三角地区中心的广州市为例,分析了臭氧光化学生成和破坏途径以及减排措施。为分析珠江三角洲(PRD)地区夏秋过渡季节的臭氧污染成因,以位于珠江三角洲(PRD)地区中心的广州市为例,利用基于综合观测的箱式模式分析了臭氧光化学生成和破坏途径以及减排方案。结果表明,观测期间停滞的气象条件和高温适合臭氧的光化学生成,导致臭氧污染范围广、持续时间长。芳香烃(AHs)对臭氧形成潜能值(OFP)的贡献最大,间二甲苯、甲苯和邻二甲苯是对臭氧形成潜能值贡献最大的三种挥发性有机化合物。箱式模型分析表明,污染期间的平均 O3 净产生率为 23.2×10-9 h-1,峰值达到 39.2×10-9 h-1。HO2-+NO和NO2+-OH反应途径对当地光化学臭氧生成(51.2%)和破坏(47.0%)的贡献最大。和破坏(47.0%)。观测到的臭氧浓度主要受本地光化学 O3 生成和以输出为主的传输控制。RIR和EKMA分析表明,广州在夏秋过渡季节的臭氧形成主要受限于挥发性有机物,而AHs对臭氧生成的敏感性最大。甲苯、间/对二甲苯、邻二甲苯、正丁烷和丙烯是影响 O3 生成的五种主要成分。对减排方案的分析表明,减少人为挥发性有机化合物排放是降低臭氧浓度的最有利途径;但是,如果在减少挥发性有机化合物排放后再控制氮氧化物排放,臭氧浓度会在短时间内反弹。我们的研究结果表明,要想在未来持续降低臭氧浓度,应在主要减少挥发性有机物的同时,协同减少挥发性有机物和氮氧化物的排放。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
环境科学
环境科学 Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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