Poissant L
Sci Total Environ. 2000 Oct 2;259(1-3):191-201. doi: 10.1016/s0048-9697(00)00582-9.
The main objectives of this paper were to report total gaseous mercury (TGM) concentrations at four stations along the St. Lawrence River in 1998 and to give some insights regarding their fate. The TGM network stretches from latitudes 45 degrees N to 50 degrees N. TGM and ozone concentrations (used as complementary pollutant) were presented. The median TGM concentrations throughout the network varied from 1.62 to 1.79 ng/m3. Sites close to Montreal had larger TGM concentrations. Montreal surroundings appeared to be a source of TGM. The TGM concentrations were maximum in wintertime and minimum in summertime throughout the sites. However, the diurnal variations were site specific. St. Anicet and L'Assomption were more variable in terms of large concentrations, whereas Mingan and Villeroy were more variable in terms of low concentrations. Ozone and TGM concentrations were positively correlated at some sites (Villeroy, Mingan and St. Anicet) whereas they were not at L'Assomption (closest site to Montreal). Local TGM and ozone precursor sources would affect the correlation.
本文的主要目的是报告1998年圣劳伦斯河沿岸四个站点的总气态汞（TGM）浓度，并对其归宿给出一些见解。TGM监测网络从北纬45度延伸至北纬50度。文中呈现了TGM和臭氧浓度（用作补充污染物）。整个监测网络中TGM浓度的中位数在1.62至1.79纳克/立方米之间变化。靠近蒙特利尔的站点TGM浓度更高。蒙特利尔周边地区似乎是TGM的一个来源。在所有站点，TGM浓度冬季最高，夏季最低。然而，日变化因站点而异。圣阿尼塞和拉索姆ption在高浓度方面变化更大，而明根和维勒鲁瓦在低浓度方面变化更大。在一些站点（维勒鲁瓦、明根和圣阿尼塞），臭氧和TGM浓度呈正相关，而在拉索姆ption（离蒙特利尔最近的站点）则不然。当地的TGM和臭氧前体来源会影响这种相关性。
