| .金矿区冬季环境气态汞分布特征研究[J].农业环境科学学报,2013,32(3):. |
| 金矿区冬季环境气态汞分布特征研究 |
| The Distribution Characteristics of Gaseous Mercury in Gold Mine Area During the Period of Winter |
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| DOI：10.11654/jaes.2013.03.029 |
| 中文关键词: 汞 金矿区 寒区 积雪 农田 |
| 英文关键词: mercury gold mine area high-cold area snow cover field |
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| 摘要点击次数: 1767 |
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| 中文摘要: |
| 为掌握冬季季节性积雪条件室内环境空气和室外大气的汞浓度水平与变化特征及汞源，在夹皮沟金矿区内设置了4处采样点，使用汞分析仪（Zeeman RA915+）连续测定了气态汞浓度，同步测定了气压、气温和风速等气象因子，研究室内外气态汞浓度分布特征，并分析主要气态汞源和释汞过程。结果表明：春秋宾馆、宾馆室外、开阔农田和沟谷林地4处采样点研究期间气态汞浓度均值依次为106.8、6.1、5.8、1.8 ng·m-3；室内气态汞浓度水平比室外高两个数量级。冬季季节性积雪控制下，自然释汞过程微弱，人为释汞控制气态汞浓度水平和变化趋势，是大气汞主要来源。冬季逆温等气象过程严重影响区域大气汞扩散，从而引起局部短暂的严重汞污染现象。 |
| 英文摘要: |
| In order to grasp the concentration levels and the variation characteristics of air mercury indoors and outdoors under the condition of seasonal snow cover in winter, four sampling sites in Jiapigou gold mine area have been set and the concentration level of gaseous mercury have been monitored continuously by Zeeman RA915+ as well as air pressure, temperature and wind velocity simultaneously. The distribution characteristics of the gaseous mercury indoors were explored and its major sources as well as releasing process came into the focus of the analysis. The result is represented that the concentration levels（based on the height of 150 cm from the ground）are 106.8 ng·m-3,6.1 ng·m-3, 5.8 ng·m-3 and 1.8 ng·m-3 in the four sampling sites of Spring and Autumn Hotel, outdoor Hotel, spacious cornfield and woods. Furthermore, it is shown that the concentration level of gaseous mercury indoors is 2 orders higher than that of the outdoors. In addition, during the winter seasonal snow cover period, the natural releasing process of gaseous mercury is weaker while it is the releasing process impacted by human contributing to the distinct changes in concentration as well as variation trend of gaseous mercury that converses to be the major source. Overall, the temperature inversion severely results in the proliferation of the gaseous mercury, which can be designated as the cause for the serious mercury pollution partially in time and space. |
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