我国东北地区城乡连续空间大气汞分布特征研究

The spatial distribution features of gaseous Hg in the continuous space of city-countryside in Northeast China

为掌握我国东北地区连续空间内大气中汞污染物的分布特征,使用车载高分辨率测汞仪(LUMEX Zeeman RA915+),由哈尔滨市出发,沿哈大线,终至大连市,连续测定了沿线近960km空间内大气气态总汞的质量浓度.结果表明:我国东北地区研究范围内大气汞含量均值为(9.1±5.4)ng/m3,最高值出现在沈阳市区(44ng/m3),最低值出现在扶余市、公主岭市和盖州市(1ng/m3);区域内大气汞含量的空间分布特征表现为以区域中心城市(镇)为中心,向四周呈辐射状递减趋势,且综合规模较大的城市(镇)明显高于规模较小的城镇、偏远的乡村地区;区域内大气汞含量明显较高的区域中心城市群为哈尔滨市(20.4±12.1)ng/m3、长春市(12±11)ng/m3、四平市(14.4±7)ng/m3、沈阳市(17.2±11.5)ng/m3、鞍山市(15.1±10)ng/m3和大连市(15.2±8.8)ng/m3.

In order to master the pollution features of gaseous Hg concentration in the continuous spacein the area of Northeast China,with Zeeman RA915＋ mercury analyzer on vehicle along the route fromHarbin to Dalian, along the ＂Ha-Da＂ highway, traveling incessantly, the distribution features ofgaseous Hg concentration in a distance of about 960 km have been determined synchronously. Theresults are as follows- in the area the mean value of gaseous Hg contents are （9. 1±5.4） ng/m^3 ,andthe max appeared in Shenyang and the rain are located in Fuyu,Gongzhuling and Gaizhou. The spatialdistribution features of gaseous Hg concentration in the area are that centered the central cities, thecontents of gaseous Hg reduced gradually in the shape of radiation. The city is larger,the contents ofgaseous Hg are higher and both of them are higher than countryside. The higher cities whose contentsof gaseous Hg in the survey region is that in Harbin region it is （20.4 ± 12.1） ng/m^3 , in Changchunregion it is （12±11） ng/m^3 ,in Siping region it is （14.4±7） ng/m^3 ,in Shenyang region it is （17.2±11.5） ng/m^3 , in Anshan region it is （ 15.1±10） ng/m^3 and in Dalian region it is （15.2± 8.8） ng/m^3.