干旱区研究 ›› 2021, Vol. 38 ›› Issue (2): 562-569.doi: 10.13866/j.azr.2021.02.28

• 生态与环境 • 上一篇    下一篇

大气污染物浓度变化特征及潜在源分析——以乌鲁木齐为例

刘子龙1(),代斌1(),崔卓彦1,刘永高1,徐柱2,郑新军3   

  1. 1.新疆生产建设兵团化工绿色过程重点实验室,石河子大学化工学院,新疆 石河子 832003
    2.新疆天池管理委员会博格达生态环境监测站,新疆 阜康 831500
    3.中国科学院新疆生态与地理研究所阜康荒漠生态站 新疆 乌鲁木齐 830011
  • 收稿日期:2020-05-20 修回日期:2020-07-16 出版日期:2021-03-15 发布日期:2021-04-25
  • 通讯作者: 代斌
  • 作者简介:刘子龙(1979-),男,讲师,研究方向为环境化学与环境影响评价. E-mail:liuzilong1999@163.com
  • 基金资助:
    八师石河子市中青年科技创新领军人才计划项目(2020RC05);兵团财政科技计划青年项目(2021CB040);国家科技支撑计划项目资助(2014BAC16B04)

Concentration characteristics and potential source of atmospheric pollutants: A case study in Urumqi

LIU Zilong1(),DAI Bin1(),CUI Zhuoyan1,LIU Yonggao1,XU Zhu2,ZHENG Xinjun3   

  1. 1. Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Production and Construction Corps/School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
    2. Mount Bogda Station of Eco-environment, Xinjiang Tianchi Management Committee, Fukang 831500, Xinjiang, China
    3. Fukang Station of Desert Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
  • Received:2020-05-20 Revised:2020-07-16 Online:2021-03-15 Published:2021-04-25
  • Contact: Bin DAI

摘要:

对2017年乌鲁木齐市的气象参数及大气污染物的浓度进行了统计分析,探究了大气污染物的浓度变化特征,运用轨迹聚类分析、潜在源贡献函数(PSCF)和浓度权重轨迹法(CWT)研究了乌鲁木齐市PM2.5的传输路径和潜在源区。结果表明:乌鲁木齐市大气超标污染物主要为PM2.5和PM10,除O3外各污染物的浓度均是采暖期高于非采暖期,温度低、风速小、相对湿度大、乌鲁木齐市三面环山、逆温天气是造成采暖期颗粒物污染严重的重要原因;PM2.5区域传输主要来自西北方向,在采暖期受来自尼勒克县、沙湾县、呼图壁县、阜康市的短距离传输气团影响很大;PM2.5潜在源区主要集中于阜康市、和静县、沙湾县、昌吉市、沙湾县、吉木萨尔县、玛纳斯县,乌鲁木齐市PM2.5浓度同时受外来污染物输入和本地污染源排放的影响。

关键词: 大气污染物, 浓度特征, 后向轨迹, 传输路径, 潜在源区

Abstract:

Meteorological parameters and pollutant concentrations in Urumqi, China, in 2017 were used to study the concentration characteristics of atmospheric pollutants and the influence of meteorological factors on pollutants. Trajectory cluster analysis, potential source contribution function analysis, and the concentration weighted trajectory method were used to assess the transport pathways and potential sources of PM2.5. The findings revealed that the most serious pollution was from PM10 and PM2.5. During periods of heating, the concentrations of atmospheric pollutants, apart from O3, were higher than those during periods where there was no heating. The heavy pollution of atmospheric particles (PM2.5 and PM10) during heating periods was ascribed primarily to low temperature, low wind speed, high relative humidity, special topographies, and temperature inversion. PM2.5 in Urumqi was transported mostly from the northwest, the short distance pathways of Nileke Town, Shawan Town, Hutubi Town, and Fukang City had greater influence on Urumqi during heating period. The main potential sources of PM2.5 were determined as being Fukang City, Hejing Town, Shawan Town, Changji City, Shawan Town, Jimusaer Town, and Manasi Town. External transport and native sources of pollution also had a great impact on the level of PM2.5 in Urumqi.

Key words: atmospheric pollutants, concentration characteristics, backward trajectory, transport pathway, potential source