福建沿海地区大气悬浮颗粒物及颗粒态汞的时空分布研究

摘要

2010年4月-2011年3月，对福建省厦门至泉州沿海地区大气中悬浮颗粒物（PM10）和颗粒态汞（TPM）进行为期一年的观测，结果表明其大气中PM10和TPM的浓度范围分别为6.4～426.5μg／m3和18.2～3879.4 pg／m3，PM10和TPM平均浓度分别为122.5μg／m3和947.9pg／m3。不同采样点PM10和TPM浓度的季节变化趋势稍有不同，但大致都呈冬高夏低的趋势。PM10和TPM浓度的季节变化趋势主要与气温、逆温层、降雨量等气象条件有关。同时研究分析了TPM的昼夜变化趋势，结果表明TPM浓度在春冬季主要表现为夜间浓度高于日间浓度，夏秋季则为日间浓度高于夜间浓度。%Inhalable particles (PM1 0 )and total particulate mercury (TPM)in the coastal area along Xiamen and Quanzhou of Fujian Province were monitored for one year.The results showed that in the time period of April 201 0 to March 201 1 ,the average concentration of PM1 0 was 1 22.5 μg/m3 (6.4 ~426.5μg/m3 ),while the average concentration of TPM was 947.9 pg/m3 (1 8.2 ~3879.4 pg/m3 ).The seasonal variation showed that winter had the highest concentration of PM1 0 and TPM and summer had the lowest concentration of them.Different sampling sites had different trends.Seasonal variation was related to temperature,thermal inversion layer and precipitation. The diurnal variation showed that the concentration of TPM was higher at night than in the daytime in spring and winter,while the concentration of TPM was higher in the daytime than at night in summer and autumn.