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One year study of PM_(2.5) in Xinxiang city, North China: Seasonal characteristics, climate impact and source

机译:华北新乡市PM_(2.5)的一年研究:季节特征,气候影响和来源

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摘要

This study was conducted in order to explore the seasonal characteristics, climate impact and source of PM2.5 in Xinxiang, China. Daily PM2.5 samples were collected at urban site from January to December in 2015. Average PM2.5 concentration was 100.6 +/- 65.8 mu g m(-3) in Xinxiang, which was several times higher than China Ambient Air Quality Standards (GB3095-2012). Secondary inorganic aerosols (SIA) constituted 70% of the total ionic concentrations. The average concentration of SO42- was 6.4 +/- 12.0 mu g m(-3), which ranked the highest among the water-soluble ions analyzed. Seasonal variations of PM2.5 and its major chemical components were significant, most of them with high values in winter and the lowest values in summer, especially with heavier PM2.5 events (more than 200 mu g/m(3)) in December. SIA and OC on polluted days were 2.1-2.3 times higher than those of on clean days. It was estimated that Fe, Li, Na, Mg, Al, K, Ca and Sr were emitted from crustal sources and Pb, Cr, Ni, Cu, Zn, As, Cd and V were emitted from anthropogenic emissions using the EF values. Analysis using the tracer and PCA/MLR revealed that vehicle exhausts were the most important source of PM2.5, which contributed 26.9% of PM2.5 over the whole study period. This study provides detailed composition data and first comprehensive analysis of PM2.5 in Xinxiang during a whole year.
机译:进行这项研究是为了探索中国新乡的季节性特征,气候影响和PM2.5的来源。 2015年1月至12月,每天在城市现场采集PM2.5样品。新乡市的PM2.5平均浓度为100.6 +/- 65.8μgm(-3),比中国环境空气质量标准(GB3095)高出几倍-2012)。次生无机气溶胶(SIA)占总离子浓度的70%。 SO42-的平均浓度为6.4 +/- 12.0μg m(-3),在所分析的水溶性离子中排名最高。 PM2.5及其主要化学成分的季节变化非常显着,其中大多数在冬季较高,而在夏季最低,特别是在12月PM2.5事件较重(超过200μg / m(3))时。 。污染天的SIA和OC比干净天高2.1-2.3倍。据估计,从地壳源中排放出Fe,Li,Na,Mg,Al,K,Ca和Sr,而使用EF值从人为排放中排放出了Pb,Cr,Ni,Cu,Zn,As,Cd和V。使用示踪剂和PCA / MLR进行的分析表明,汽车尾气是PM2.5的最重要来源,在整个研究期间,其占PM2.5的26.9%。该研究提供了新乡市全年PM2.5的详细成分数据和首次综合分析。

著录项

  • 来源
    《Ecotoxicology and Environmental Safety》 |2018年第6期|75-83|共9页
  • 作者单位

    Henan Normal Univ, Sch Environm, Key Lab Yellow River & Huai River Water Environm, Minist Educ,Henan Key Lab Environm Pollut Control, Xinxiang 453007, Henan, Peoples R China;

    Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China;

    Xinxiang Meteorol Bur, Xinxiang 453007, Peoples R China;

    Henan Normal Univ, Sch Environm, Key Lab Yellow River & Huai River Water Environm, Minist Educ,Henan Key Lab Environm Pollut Control, Xinxiang 453007, Henan, Peoples R China;

    Arizona Dept Environm Qual, 1110 W Washington St, Phoenix, AZ 85007 USA;

    Henan Normal Univ, Sch Environm, Key Lab Yellow River & Huai River Water Environm, Minist Educ,Henan Key Lab Environm Pollut Control, Xinxiang 453007, Henan, Peoples R China;

    Henan Normal Univ, Sch Environm, Key Lab Yellow River & Huai River Water Environm, Minist Educ,Henan Key Lab Environm Pollut Control, Xinxiang 453007, Henan, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PM2.5; Seasonal variations; Major chemical; Source identification;

    机译:PM2.5;季节变化;主要化学物质;来源识别;
  • 入库时间 2022-08-17 13:22:38

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