Journal of Shandong University (Health Sciences) ›› 2018, Vol. 56 ›› Issue (11): 116-122.doi: 10.6040/j.issn.1671-7554.0.2018.549

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Pollution evaluation of heavy metals on PM2.5 in a city of North China

LIU Xiao1,2, ZUO Shumei1, ZHANG Ying1, CHEN Fengge1, YAN Xiangjuan1, YANG Lixue1   

  1. 1. Institute of Enviromental Health, Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang 050017, Hebei, China;
    2. School of Public Health, Hebei Medical University, Shijiazhuang 050017, Hebei, China
  • Published:2022-09-27

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Abstract: Objective To understand the pollution characteristics of PM2.5 and heavy metals in PM2.5 in a city of North China in 2014. Methods Taking the main city as the research subject, the concentrations of PM2.5 and heavy metals(As, Cd, Co, Cr, Hg, Ni, Pb and Ti)in PM2.5 were determined. The source, pollution degree and ecological risk of heavy metals of PM2.5 during heating and non-heating period were evaluated by the enrichment factor(EF), the ground accumulation index and the potential ecological risk index. Results The concentration of PM2.5 in the main area was significantly different between the heating period and non-heating period in 2014. The mean concentrations of PM2.5 in the two periods were 184 μg/m3 and 96 μg/m3, respectively. The EFs of Cd, Hg and Pb indicated that they were highly enriched during heating and non-heating period, so they were mainly from human activities. As which was influenced by both nature and human activities, was significantly enriched. Ti was significantly enriched in the heating period and 山 东 大 学 学 报 (医 学 版)56卷11期 -刘肖,等.华北某市PM2.5中重金属污染评价 \=-strongly enriched in the non heating period, Co、Cr and Ni was slightly enriched in the heating period which mainly came from the earths crust and slightly affected by human activities. The orders of heavy metals pollution degree in PM2.5 in heating period and non-heating period were Cd>Hg>Pb>Ti>As>Cr>Ni=Co and Cd>Hg>Ti>As>Pb>Ni=Cr>Co. The most serious pollution was Cd. The pollution degree of Hg, Pb and Ti in heating period was obviously higher than in non-heating period. The potential ecological risk of Cd in PM2.5 was extremely strong. Hg had a strong ecological risk, and As, Co, Cr, Ni, Pb and Ti had slight ecological risks. The comprehensive ecological risk index of heavy metals in PM2.5 was more than 600, meaning the potential ecological risk was extremely strong. Conclusion The degree of enrichment,pollution and ecological risk of heavy metals of PM2.5 during the sampling days and heavy polluted weather in heating period were more serious than that in non-heating period in 2014, which impacted the health of the people in this environment.

Key words: PM2.5, Heavy metal, Enrichment factor, Geoaccumulation index, Potential ecological risk index

CLC Number: 

  • R574
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