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| 重庆黔江区大气降水的化学特征及来源分析 |
| Analysis on the Chemical Characteristics and Origin of Atmospheric Precipitation in Qianjiang District of Chongqing City |
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| DOI： |
| 中文关键词: 大气降水 化学特征 来源 富集系数 |
| 英文关键词: Atmospheric precipitation Chemical characteristics Source Enrichment factors |
| 基金项目:环保公益性行业科研专项基金资助项目（201009001） |
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| 中文摘要: |
| 通过2013年6月—2014年5月对黔江区大气降水的化学组成分析研究表明，降水样品的pH值分布范围在4.91～7.32之间；SO2-4是降水中主要的阴离子，占阴离子总量的68.9%，Ca2+是降水中含量较高的阳离子，占阳离子总量的41.4%；SO2-4/NO-3浓度比为6.78，表明降水类型为硫酸盐型。陆源性离子Ca2+、Mg2+以及海源性离子Na+和Cl-之间存在明显的相关关系。海水和土壤的富集系数表明，研究区域的SO2-4和NO-3主要归因于人为活动的影响。 |
| 英文摘要: |
| Comprehensive studies of the chemical composition of atmospheric precipitation were from June 2013 to May 2014 in Qianjiang district of Chongqing city.pH of precipitation events ranged from 4.91 to 7.32.SO2-4 was the main anion,accounting for 68.9% of the total mass measured anions in precipitation.Ca2+was the main cation,accounting for 41.4% of the total cations.The mean concentration ratio for SO2-4/NO-3 was 6.78,indicating that the rain pollutants was sulphate.Significant correlations were found between soil derived species Ca2+and Mg2+ and sea salt species between Na+ and Cl-.Enrichment factors of marine and soil indicated that SO2-4and NO-3is mostly attributed to the anthropogenic activities. |
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