摘要
为了了解贵州省环境空气异戊二烯的浓度水平及分布情况,以贵州省2019年臭氧污染较为严重的地区为研究区域选取了18个采样点,这18个点位包括了工业区、城市建成区、居民区、交通枢纽等排放人为源挥发性有机物(AVOCs)的区域,和水生植物种植区、森林植被覆盖区、自然风景区等排放植物源挥发性有机物(BVOCs)的区域,尤其以水生植物种植区的异戊二烯观测为重点,在2020年7~9月期间分批次进行了环境空气异戊二烯的离线采样和臭氧浓度的同步在线监测。结果表明,贵州省大气异戊二烯日均浓度在0.13~6.13μg/m^(3)之间,其中BVOCs采样区域、AVOCs采样区域、水生植物种植区、森林植被覆盖区的异戊二烯日均浓度分别为1.74、0.52、2.26、1.23μg/m^(3),白天平均浓度分别为2.80、0.54、4.03、1.57μg/m^(3),夜间平均浓度分别为0.68、0.50、0.49、0.88μg/m^(3),BVOCs采样区域的异戊二烯日均浓度、白天浓度高于AVOCs采样区,夜间浓度差异不大;水生植物种植区的日均浓度和白天浓度高于森林植被覆盖区,这表明贵州部分地区水生植物在夏季白天的异戊二烯排放比森林植被等陆生植物要高,水生植物(荷花、芦苇、慈姑等)排放的异戊二烯对环境的影响值得关注并深入研究。
In 2019,to better understand the concentration and distribution of ambient isoprene in Guizhou Province,18 sampling points were selected in areas with severe ozone pollution.They comprised sources of anthropogenic volatile organic compound(AVOC)emission,such as transportation hubs,industrial,urban,and residential areas;and sources of biogenic volatile organic compound(BVOC)emission,such as natural scenic areas and other areas with aquatic and forest vegetation,especially emphasis on the observation of isoprene in areas containing aquatic vegetation.On site sampling of environmental air isoprene and simultaneous online monitoring of ozone concentrations were conducted in batches during the period from July to September 2020.The results indicated that the daily average concentration of isoprene in the atmosphere of Guizhou Province ranged from 0.13 to 6.13μg/m^(3).The daily average concentrations of isoprene in the BVOC sampling area,AVOC sampling area,aquatic vegetation area,and forested vegetation area were 1.74,0.52,2.26,and 1.23μg/m^(3),respectively.The daytime average concentrations were 2.80,0.54,4.03,and 1.57μg/m^(3),respectively,while the nighttime average concentrations were 0.68,0.50,0.49,and 0.88μg/m^(3),respectively.The daily average and daytime concentrations of isoprene in the BVOC sampling area were higher than those in the AVOC sampling area,with little difference in nighttime concentrations.The daily average and daytime concentrations of isoprene in aquatic plant cultivation areas were higher than those in forested vegetation areas.This suggests that in some parts of Guizhou,aquatic plants emit more isoprene during the daytime in the summer compared to terrestrial plants such as those in forests.The emissions of isoprene from aquatic plants(such as lotus,reeds,and water chestnuts)warrant further attention and in-depth research.
作者
罗皓
李启泰
左仁慧
刘芳
谢凯夫
曹骅
马关琴
李函颖
章婷
LUO Hao;LI Qitai;ZUO Renhui;LIU Fang;XIE Kaifu;CAO Hua;MA Guanqin;LI Hanying;ZHANG Ting(Guizhou Huanke Environmental Protection Consulting Co.,Ltd,Guiyang 550081,China;Environmental Science Society of Guizhou Province,Guiyang 550081,China;School of Life Sciences,Guizhou Normal University,Guiyang 550025,China;School of Geography and Environmental Science,Guizhou Normal University,Guiyang 550025,China;Guizhou Zhongzi Huanke Technology Co.,Ltd,Guiyang 550081,China)
出处
《地球与环境》
CAS
CSCD
北大核心
2024年第3期277-285,共9页
Earth and Environment
基金
贵州省科学技术基金项目(黔科合基础[2019]1232)。
关键词
贵州省
异戊二烯
水生植物
Guizhou Province
isoprene
aquatic plants
