邢台氨减排对京津冀PM_(2.5)改善的溢出效益  

Spillover Benefits of Ammonia Emission Reduction in Xingtai Area to the Improvement of Atmospheric PM_(2.5) Concentration in the Beijing-Tianjin-Hebei Region

作　　者：边泽君 闻超玉 郎建垒[1] 范晓菡 夏祥晨 周颖[1] BIAN Ze-jun;WEN Chao-yu;LANG Jian-lei;FAN Xiao-han;XIA Xiang-chen;ZHOU Ying(Key Laboratory of Beijing on Regional Air Pollution Control,College of Environmental and Energy Engneering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学环境与生命学部,区域大气复合污染防治北京市重点实验室,北京100124

出　　处：《环境科学》2024年第4期1994-2002,共9页Environmental Science

基　　金：国家自然科学基金项目(51878012);北京市科技新星计划项目(Z201100006820098)。

摘　　要：氨减排会对周边大气PM_(2.5)污染改善带来潜在的溢出效益,但尚缺乏对其规律的探究.利用WRF-CAMx-PSAT模型模拟量化了典型城市(邢台)NH_(3)减排对周边地区大气PM_(2.5)浓度降低的溢出效益,探究了其在不同季节与不同NH_(3)减排比例下、对PM_(2.5)及其二次无机化学组分随距离变化的响应规律.结果表明:(1)NH_(3)减排在不同减排比例下对周边城市的PM_(2.5)及其二次组分均存在溢出效益,其效益随周边受体城市与减排城市相对距离的增加呈显著的指数下降的趋势;(2)在1月的溢出效益远高于7月,1月在不同减排比例下京津冀PM_(2.5)浓度下降值约为7月的7.4倍;(3)各组分溢出范围随着减排比例的增加不断扩大,NH_(4)^(+)和SO_(4)^(2-)的溢出最远距离呈指数趋势上升,NO_(3)^(-)的溢出最远距离呈线性趋势上升;(4)NO_(3)^(-)、NH_(4)^(+)和SO_(4)^(2-)的溢出范围及浓度变化随着减排比例的增加不断上升,其中NO_(3)^(-)溢出范围最远约为NH_(4)^(+)和SO_(4)^(2-)的3.6倍和3.4倍,浓度变化最大约为NH_(4)^(+)和SO_(4)^(2-)的2.6倍和7.3倍.Ammonia emission reduction would bring potential spillover benefits to the improvement of surrounding atmospheric PM_(2.5) pollution,but the investigation of its patterns is lacking.The WRF-CAMx-PSAT model was used to quantify the spillover benefits of NH_(3) emission reduction in a typical city(Xingtai)on the reduction in PM_(2.5) concentrations in the surrounding area and to investigate the response patterns of PM_(2.5) and its secondary inorganic chemical components with distance in different seasons and at different NH_(3) emission reduction ratios.The results showed that:①the spillover benefits of NH_(3) emission reduction on PM_(2.5) and its secondary components in neighboring cities at different reduction ratios and the benefits showed a significant exponential decrease with the increase in the relative distance between the neighboring receptor cities and the reduction cities.②The spillover benefits in January were much higher than those in July,and the reduction in PM_(2.5) concentration in Beijing-Tianjin-Hebei at different reduction ratios in January was approximately 7.4 times that in July.③The spillover range was expanding with the increase in emission reduction ratio,the farthest distance of NH_(4)^(+) and SO_(4)^(2-) spillover was increasing exponentially,and the farthest distance of NO_(3)^(-) spillover was increasing linearly.④The spillover range and concentration change in NO_(3)^(-),NH_(4)^(+),and SO_(4)^(2-) increased with the increase in the abatement ratio,in which the spillover range of NO_(3)^(-)was the farthest,approximately 3.6 times and 3.4 times that of NH_(4)^(+) and SO_(4)^(2-),and the concentration change was the largest,approximately 2.6 times and 7.3 times that of NH_(4)^(+) and SO_(4)^(2-).

关 键 词：NH_(3)减排 溢出效益 WRF-CAMx-PSAT模型 大气污染 京津冀 

分 类 号：X51[环境科学与工程—环境工程]