| 厦门市降水中金属元素含量分布特征及来源解析 |
| 摘要点击 1699 全文点击 564 投稿时间：2019-04-14 修订日期：2019-05-23 |
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| 中文关键词 降雨 金属元素 含量 来源 同位素 正定矩阵分解法(PMF) |
| 英文关键词 rainwater metal elements concentration source isotope positive matrix factorization |
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| 中文摘要 |
| 利用电感耦合等离子体质谱仪对厦门市雨水中包括稀土元素在内的41种金属元素含量及铅同位素比值进行测定，并通过富集因子法、同位素示踪法以及正定矩阵分解法（PMF）联用对其来源进行判定.结果表明，厦门市雨水中金属元素总质量浓度表现为冬季郊区（213.964 μg·L-1） > 冬季城区（176.357 μg·L-1） > 夏季郊区（75.401 μg·L-1），其中，以Mn、Ni、Cu、Zn、Ba和Sr为主.稀土元素含量存在季节和区域间差异，其标准化配分模式与各潜在源均不一致，表明其来源相对复杂.富集因子分析表明Ni、Cu、Zn和Cd受人为源影响显著，而Be、Ti、V、Mn、Cr、Co、Ga、Rb、Y、Cs、REEs、Th和U受到自然源影响更大；铅同位素示踪结果表明降雨中铅受燃煤源影响较大，其贡献率为63.67%，受土壤母质层、垃圾焚烧、机动车尾气和水泥尘共同影响的贡献率为36.33%.PMF结合富集因子、同位素示踪法分析结果表明，降雨中元素总体受到燃煤源、自然源、工业源和交通源的共同影响. |
| 英文摘要 |
| Forty-one metal elements, including rare earth elements and the lead isotope ratio in rain water in Xiamen were measured by inductively coupled plasma mass spectrometry. Sources of metal elements were identified by combined enrichment factor, isotope analysis, and positive matrix factorization analysis. The results showed that the concentration sequence of total metal elements in rainwater in Xiamen was winter-suburban (213.964 μg·L-1) > winter-urban (176.357 μg·L-1) > summer-suburban (75.401 μg·L-1). There were seasonal and regional differences in the content of rare earth elements, and their standardized distribution patterns were inconsistent with each potential source, indicating that their sources were relatively complex. Enrichment factor analysis showed that Ni, Cu, Zn, and Cd were significantly affected by human sources, whereas Be, Ti, V, Mn, Cr, Co, Ga, Rb, Y, Cs, rare earth elements, Th, and U were mainly affected by natural sources. The result of Pb-isotopic-analysis showed that Pb in rainwater was significantly affected by coal sources with a contribution rate of 63.67%, and soil parent material, garbage incineration, motor vehicle exhaust, and cement dust with a contribution rate of 36.33%. The result of positive matrix factorization combined with the enrichment factor and isotope method showed that the metal elements in rainwater were affected by coal burning, natural sources, industry, and traffic. |
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