| 秋季渤海、北黄海大气气溶胶中水溶性离子组成特性与来源分析 |
| 摘要点击 1995 全文点击 1089 投稿时间：2013-02-15 修订日期：2013-04-24 |
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| 中文关键词 大气气溶胶 水溶性离子 甲基磺酸盐 非海盐硫酸盐 渤海 北黄海 |
| 英文关键词 atmosphere aerosol water-soluble ions methanesulfonic acid non-sea-salt sulfate Bohai Sea North Yellow Sea |
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| 中文摘要 |
| 于2010年秋季在渤海、北黄海海域采集大气气溶胶总悬浮颗粒物(TSP)样品,运用离子色谱法测定了主要水溶性阳离子(Na+、K+、NH4+、Mg2+、Ca2+) 和阴离子[Cl-、NO3-、SO42-、CH3SO3-(MSA)]的浓度,并结合富集因子、相关性因子分析等方法探讨了其来源. 结果表明,渤海、北黄海气溶胶样品中主要水溶性离子总浓度分别为30.9~58.8 μg·m-3和5.03~39.8 μg·m-3,平均值分别为(40.3±10.1)μg·m-3和(19.2±11.8)μg·m-3. 二次离子(非海盐硫酸盐 nss-SO42-、NO3-和NH4+)浓度最高,分别占测定离子总浓度的87.5%和62.8%. 富集因子分析表明,Mg2+、Cl-主要来自海源,K+主要来自地壳源. 来源分析结果表明,渤海、北黄海TSP中海盐硫酸盐分别占总SO42-浓度的1.2%和12.1%,生源硫酸盐(SO4 bio2-)对nss-SO42-的平均贡献分别为5.0%和14.6%,说明人为活动输入仍是气溶胶中SO42-的主要来源. |
| 英文摘要 |
| The total suspended particulate (TSP) samples in aerosol were collected over the Bohai Sea (BS) and the North Yellow Sea (NYS) during Autumn 2010 to determine the concentration of main water-soluble cations (Na+, K+, NH4+, Mg2+, Ca2+) and anions[Cl-, NO3-, SO42-, CH3SO3-(MSA)] by ion chromatography. Main sources of these ions were discussed by combined enrichment factors and correlation analyses. The concentration of total water-soluble ions ranged from 30.9 μg·m-3 to 58.8 μg·m-3 over the BS and from 5.03 μg·m-3 to 39.8 μg·m-3 over the NYS, respectively, with averages of (40.3±10.1) μg·m-3 and (19.2±11.8) μg·m-3. Analytical results showed that the level of the second ions (nss-SO42-, NO3- and NH4+) were the highest, accounting for 87.5% and 62.8% of total identified ions over the BS and the NYS. Enrichment factors showed that Mg2+and Cl- mainly came from oceanic sources and the main source of K+ was crust. The analysis of sulfate source showed that sea-salt sulfates over the BS and the NYS accounted for 1.2% and 12.1% of the total sulfate and contributions of biogenic sulfates to nss-SO42- were 5.0% and 14.6%, respectively, indicating that human activities were the main source of sulfate in aerosol in the study area. |
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