| 郑州市冬季大气PM2.5金属元素来源及健康风险评价 |
| 摘要点击 3427 全文点击 1074 投稿时间：2021-05-30 修订日期：2021-07-20 |
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| 中文关键词 郑州市 PM2.5 重金属 健康风险 正定矩阵因子模型(PMF) |
| 英文关键词 Zhengzhou City PM2.5 heavy metals health risk positive matrix factorization(PMF) |
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| 中文摘要 |
| 以郑州市2019年12月大气PM2.5为对象，分析其中Ca、Fe、K、Mg、Sb、Na、As、Cu、Pb、Zn、V、Co、Cr和Ni含量，运用地累积指数（geo-accumulation index，Igeo）和正定矩阵因子模型（positive matrix factorization，PMF）分析元素污染程度和来源，采用美国EPA健康风险评价模型对重金属元素的健康风险进行评价.结果显示，采样期间日均ρ（PM2.5）为108μg ·m-3，金属元素中ρ（Ca）最高（5.9 μg ·m-3）.地累积指数结果表明，Sb污染程度最高，Sb、As和Cu造成极重污染，PMF解析结果表明，采样期间研究区域金属元素来源有冶金工业源、交通移动源、固体废物焚烧源和燃煤与扬尘混合源.不同污染水平下儿童所受非致癌风险更高而成年人所受致癌风险更高，各金属元素对人体的非致癌风险总体上在人体可接受范围，而As造成的致癌风险超出可接受范围.各类源HQ值均小于1，非致癌风险可忽略不计，具体排序为：燃煤与扬尘混合源>固体废物焚烧源>冶金工业源>交通移动源.各类源的ILCR排序为：燃煤与扬尘混合源>冶金工业源>固体废物焚烧源>交通移动源，其中燃煤与扬尘混合源ILCR超过人体可接受范围. |
| 英文摘要 |
| PM2.5samples were taken at the environmental monitoring station of Zhengzhou city in December, 2019, after which the metal elements Ca, Fe, K, Mg, Sb, Na, As, Cu, Pb, Zn, V, Co, Cr, and Ni were analyzed. The pollution degree and sources of metal elements were analyzed using the geo-accumulation index and PMF model. Additionally, the health risk of heavy metal elements was evaluated with the health risk assessment models of the US EPA. The composition test showed that the daily average ρ(PM2.5) was 108 μg·m-3, and ρ(Ca) was the highest among all metal elements (5.9 μg·m-3). The geo-accumulation index showed that the pollution degree of Sb was the highest, and Sb, As, and Cu caused heavily pollution. The PMF result showed that metallurgy, vehicles, solid waste incineration, and the mixed source of coal burning and dust were the main contributing sources of metal elements. At different pollution levels, children were under higher non-carcinogenic risk, whereas adults were under higher carcinogenic risk. The carcinogenic and non-carcinogenic risks of all metal elements were generally at an acceptable level, except the carcinogenic risk of As. The non-carcinogenic risks of all sources were negligible with HQ values under 1, and their ranking was as follows:the mixed source of coal burning and dust>solid waste incineration>metallurgy>vehicles. The ranking of ILCR values was:the mixed source of coal burning and dust>metallurgy>solid waste incineration>vehicles, among which the ILCR of the mixed source of coal burning and dust exceeded the acceptable range. |
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