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首页> 外文期刊>Environmental Geochemistry and Health >Characteristics, emission sources and health risk assessment of trace elements in size-segregated aerosols during haze and non-haze periods at Ningbo, China
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Characteristics, emission sources and health risk assessment of trace elements in size-segregated aerosols during haze and non-haze periods at Ningbo, China

机译：中国宁波雾霾和非阴霾周期尺寸隔离气溶胶中微量元素的特征，排放来源和健康风险评估

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摘要

To characterize trace elements from inhalable particles and to estimate human health risks, airborne particles at an urban area of Ningbo city during haze and non-haze periods from November 2013 to May 2014 were collected by a nine-stage sampler. Seventeen trace elements (Na, Mg, Al, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd and Pb) were measured by inductively coupled plasma mass spectrometry (ICP-MS). The concentrations of trace elements are in the ranges of 0.51 ng m(-3) (Co) similar to 1.53 mu g m(-3) (K) for fine particles (Dp 2.1 mu m), and 1.07 ng m(-3) (Co) similar to 4.96 mu g m(-3) (K) for coarse particles (2.1 mu m Dp 9.0 mu m) during the haze days, which are 1.15 -4.30 and 1.23- 7.83-fold as those of non-haze days, respectively. These elements could be divided into crustal elements (Na, Mg, Al, Ca, Ti, Fe and Co), non-crustal elements (Cu, Zn, Cd and Pb) and mixed elements (K, V, Cr, Mn, Ni and As) according to their enrichment factor values (EFs) and size distribution characteristics. Five emission sources of trace elements were identified by positive matrix factorization (PMF) modeling. The main sources of trace elements in fine particles are traffic emission (21.7%), coal combustion (23.6%) and biomass burning (32.1%); however, soil dust (61.5%), traffic emission (21.9%) and industry emissions (11.8%) are the main contributors for coarse particles. With the help of the multiple-path particle dosimetry (MPPD) model, it was found that deposition fractions of seventeen measured elements in the pulmonary region were in the range of 12.4%-15.1% and 6.66% -12.3% for the fine and coarse particles, respectively. The human health risk assessment (HRA) was employed according to the deposition concentration in the pulmonary region. The non-carcinogenic risk (HI) was below the safety limit (1.00). Nonetheless, the excess lifetime carcinogenic risk (ELCR) for adults increased by 2.42-fold during the haze days (2.06 x 10(-5)) as compared to that of non-haze days (8.50 x 10(-6)) in fine particles. Cr (VI) and As together contributed 96.5% and 96.3% of the integrated cancer risks during the haze and non-haze periods, respectively. Moreover, the related ELCR values in coarse particles were 36.7% and 62.8% of those in the fine particles for the non-haze period and haze period, respectively.
机译：为了表征可吸入颗粒的痕量元素并估算人类健康风险，2013年11月至2014年11月至2014年11月期间宁波市城市地区的空中粒子由九阶段采样器收集。通过电感耦合等离子体质谱法测量十七个微量元素（Na，Mg，Al，K，Ca，Ti，V，Cr，Mn，Fe，Co，Ni，Cu，Zn，如CD和Pb）（ICP-MS ）。微量元素的浓度为0.51ng m（-3）（CO）的范围，其用于细颗粒（DP <2.1μm）和1.07 ng m（ - 3）（CO）类似于粗颗粒（2.1μm＆ 9.0 mu m）的4.96 mm gm（k）（-3）（-3）（k），为1.15 -4.30和1.23- 7.83倍那些分别是非阴霾的日子。这些元素可分为地壳元素（Na，Mg，Al，Ca，Ti，Fe和Co），非地壳元素（Cu，Zn，Cd和Pb）和混合元素（K，V，Cr，Mn，Ni和AS）根据他们的富集因子值（EFS）和大小分布特征。通过阳性基质分子（PMF）建模鉴定了五种排放来源。细颗粒中微量元素的主要来源是交通排放（21.7％），煤燃烧（23.6％）和生物质燃烧（32.1％）;然而，土壤粉尘（61.5％），交通排放（21.9％）和行业排放（11.8％）是粗颗粒的主要贡献者。借助于多径粒子剂量法（MPPD）模型的帮助，发现肺部区域中的十七个测量元素的沉积级分在细小和粗糙的范围内为12.4％-15.1％和6.66％-12.3％。颗粒分别。根据肺部区域的沉积浓度使用人体健康风险评估（HRA）。非致癌风险（HI）低于安全限制（1.00）。尽管如此，与非雾度天（8.50×10（-6））相比，幼霾天（2.06×10（ - 5））中，成人的过剩致癌风险（ELCR）增加2.42倍）粒子。 CR（vi）分别在雾度和非阴霾期间贡献了96.5％和96.3％的综合癌症风险。此外，粗颗粒中的相关ELCR值分别为非雾度周期和阴霾周期的细颗粒中的36.7％和62.8％。

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  • 来源
    《Environmental Geochemistry and Health》 |2021年第8期|2945-2963|共19页
  • 作者

    Long Liangping; He Jun; Yang Xiaogang;

  • 作者单位

    Univ Nottingham Ningbo China Int Doctoral Innovat Ctr Ningbo Zhejiang Peoples R China|Univ Nottingham Ningbo China Dept Chem & Environm Engn Ningbo Zhejiang Peoples R China;

    Univ Nottingham Ningbo China Int Doctoral Innovat Ctr Ningbo Zhejiang Peoples R China|Univ Nottingham Ningbo China Dept Chem & Environm Engn Ningbo Zhejiang Peoples R China|Univ Nottingham Ningbo China Key Lab Carbonaceous Wastes Proc & Proc Intensifi Ningbo Peoples R China;

    Univ Nottingham Ningbo China Dept Mech Mat & Mfg Engn Ningbo Zhejiang 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

    Haze; Trace elements; Size distribution; Source apportionment; Health risk assessment;

    机译：阴霾;微量元素;规模分布;源分摊;健康风险评估;

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