| 沿海地区海盐和大气污染物反应的致酸作用 |
| 摘要点击 4805 全文点击 2960 投稿时间：1997-08-26 |
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| 中文关键词 海盐 酸雨 氯 大气污染物 致酸作用 |
| 英文关键词 sea-salt acid rain chloride atmospheric pollutants acidification |
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| 中文摘要 |
| 着重研究全球沿海地区海盐和大气污染物SO2、NOx反应的致酸作用。通过资料分析发现：海盐和大气污染物反应的致酸存在临界浓度,在低气溶胶浓度的大气中,海盐和大气污染物反应致酸的SO2的临界浓度为0.0043mg/m3.海盐和大气污染物反应的致酸存在3种类型：火山排放SO2和海盐反应致酸,降水中过量氯与H+浓度呈正相关,过量氯对H+浓度最大贡献可达50%;外来输送SO2、NOx和海盐反应的致酸,过量氯对H+浓度最大贡献达79%,过量氯对H+浓度平均贡献在30%-50%;局地人为排放SO2和海盐反应致酸,过量氯对H+浓度最大贡献为29%. |
| 英文摘要 |
| It was focused on discussing the reaction between sea salt with atmospheric pollutants to acidify rainwater in coastal.It was found that there is a critical concentration for the reaction between sea salt with atmospheric pollutants to acidify rainwater in coastal.The critical concentration is only 0.0043mg/m3 in low aerosol concentration coastal.There are three types of mechanism for the reaction to acidify rainwater.First,SO2 emitting from volcano reacts with sea salt to acidify rainwater.The excess chloride is positively relative to H+ concentration.The maximum contribution to H+ ion occupies 50% from excess chloride.The second,SO2,which is transported,reacts with sea salt to acidify rainwater.The maximum contribution to H+ ion occupies 79% from excess chloride.The average value occupies 30%—50% for excess chloride to contribute to H+ concentration.The third mechanism is the local emission SO2、HCl and the reaction between sea salt with SO2 to acidify rainwater.The maximum value occupies 29% for excess chloride to contribute to H+ concentration. |
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