哥斯达黎加圣何塞收集的PM10颗粒物质的化学成分和来源

J. Herrera, S. Rodríguez, A. Báez
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引用次数: 3

摘要

在哥斯达黎加圣何塞市的两个地点取样,对PM10气溶胶进行了微量金属和无机离子的测量。样品采集采用Thermo Andersen高容量PM10取样器,采用玻璃纤维和石英过滤器。用离子色谱法分析了so2 -、NO3 -、Cl -、F -、po3 -、NH4 +、K +、Na +、ca2 +、mg2 +等离子,用石墨炉原子吸收光谱仪分析了微量金属V、Cu、Cr、Pb、Ni、Mn、Fe、Al。结果表明,SO4 - 2 -是最丰富的离子,Al是含量最高的微量金属。对所有数据进行Pearson相关分析,结果显示SO4 2′′、NO3′′和NH4 +具有较高的相关性,表明它们具有共同的非人为成因。此外,Na + -K +与ca2 + - mg2 +之间的相关性表明了地壳起源。除Cu-Cr和Fe-Cr外,其余微量金属均无相关性。还讨论了风向对痕量金属浓度的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Chemical Composition and Sources of PM10 Particulate Matter Collected in San Jose, Costa Rica
Measurements of trace metals and inorganic ions were carried out on PM10 aerosols sampled at two sites in the city of San Jose, Costa Rica. Samples were collected with a Thermo Andersen high volume PM10 sampler on glass fiber and quartz filters. The ions SO4 2- , NO3 - , Cl - , F - , PO4 3- , NH4 + , K + , Na + , Ca 2+ and Mg 2+ were analyzed by ion chromatogra- phy and the trace metals V, Cu, Cr, Pb, Ni, Mn, Fe and Al were analyzed using an atomic absorption spectrometer with a graphite furnace attachment. The results indicated that SO4 2� was the most abundant ion, and Al the trace metal with the highest concentration. Pearson's correlation applied to all data showed a high correlation among SO4 2� , NO3 � and NH4 + , indicating a common an- thropogenic origin. In addition, the correlation found between Na + -K + and Ca 2+ -Mg 2+ indicated a crustal origin. No corre- lation was found among the trace metals except Cu-Cr and Fe-Cr. The influence of wind direction on trace metal concen- trations is also discussed.
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