首页|十四运期间渭南市PM2.5中无机元素来源解析及健康风险评估

十四运期间渭南市PM2.5中无机元素来源解析及健康风险评估

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利用Amms-100大气重金属分析仪在线数据,结合正交矩阵因子法(PMF)对渭南市在中华人民共和国第十四届运动会(十四运)期间细颗粒物(PM2.5)中的 14种无机元素的污染特征及来源进行分析.结果表明,总元素的平均质量浓度十四运前(2.4 μg/m3)>十四运后(2.2 μg/m3)>十四运期间(1.3 μg/m3).表征扬尘的元素昼夜变幅在十四运期间远高于其他时段;铅(Pb)的峰值与交通早晚高峰时间一致,其日间变幅在中期较为平缓,表明十四运期间扬尘源和交通源的控制效果显著;钾(K)在夜间浓度较高可能与站点东北方向聚集的村庄生物质燃烧有关.PMF结果显示,监测期间渭南市PM2.5 中无机元素主要来源于扬尘源(45.2%)、燃烧源(34.5%)、交通源(12.0%)和工业源(8.3%).健康风险评价模型结果显示,所有时段中不同来源的非致癌风险的危险商(HQ)均小于 1,但在不同时段中锰(Mn)对儿童的HQ最高,且砷(As)对儿童存在致癌风险.
Source apportionment and health risk assessment of inorganic elements in PM2.5 during the 14th National Games in Weinan
The pollution characteristics and sources of 14 inorganic elements in fine particulate matter(PM2.5)in Weinan during the 14th National Games of the People's Republic of China(The 14th National Games)were analyzed by using the online data of Amms-100 atmospheric heavy metal analyzer combined with the orthogonal matrix factor method(PMF).The results showed that the average mass concentration of total elements before the fourteenth transport(2.4 μg/m3)>after the fourteenth transport(2.2 μg/m3)>during the fourteenth transport(1.3 μg/m3).The diurnal variation of elements representing dust was much higher during the fourteenth movement period than other periods.The peak value of lead(Pb)was consistent with the the morning and evening peak time of traffic,and its diurnal variation was relatively gentle in the middle period,indicating that the control effect of dust source and traffic source was significant during the 14th National Games.Higher concentration of potassium(K)at night may be related to the biomass burning of villages gathered in the northeast of the site.The results of PMF showed that during the monitoring period,inorganic elements in PM2.5 in Weinan City mainly came from dust sources(45.2%),combustion sources(34.5%),traffic sources(12.0%)and industrial sources(8.3%).The results of the health risk assessment model showed that the risk quotient(HQ)of non-carcinogenic risk from different sources in all periods was less than 1,but the HQ of manganese(Mn)in different periods was the highest in children,and arsenic(As)had carcinogenic risk in children.

PM2.5inorganic elementsThe 14th National Gamessource apportionmenthealth risk assessmentWeinan

陶亚南、郑淏、杜涛、王锦、董娅玮、陈静、周变红

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陕西省环境监测中心站陕西省大气环境监测综合质控实验室,西安 710054

宝鸡文理学院地理与环境学院陕西省灾害监测与机理模拟重点实验室,宝鸡 721013

PM2.5 无机元素 十四运 污染来源 健康风险评估 渭南市

国家大气重污染成因与治理攻关项目中国科学院气溶胶化学物理重点实验室项目陕西省科技厅项目陕西省科技厅项目陕西省自然科学基础研究计划

DQGG-05-36KLACP20042021JQ-9632016SF-4542019JM-120

2024

10.16803/j.cnki.issn.1004-6216.202304035

环境保护科学
沈阳环境科学研究院

环境保护科学

CSTPCD
影响因子：0.469
ISSN：1004-6216
年,卷(期)：2024.50(3)
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