大气气溶胶中汞污染及环境效应研究

Based on the technology of measurement of mercury vapor and environmental nucleargeophysics, the paperestablished the environmental geophysical methods used in the mercurypollution study of atmospheric aerosols, and gave the resolutions for the determination of thebackground level of mercurypollution with the introduction of the theory of the geochemicalbaseline.With the application of environmentalgeophysical method, the paperstudiedthecharacteristics of mercury pollution in the aerosols of Chengdu industrial area, which include both.the seasonal, day and night variation of particulate mercury and the distribution of particulate.mercury in the different grades of aerosols. Also the factor analysis model is used to determine the.main factor affecting the mercury level of atmospheric suspending dust ( radius less than 10μm)..The results show that the industrial area is now facing the serious situation of mercury pollution,.and the mercury level of aerosols is much higher than the background level of particulate mercury,.and also higher than those of other industrial both inside and outside of the country. Particulate.mercury has become one of the main form of atmospheric mercury deposition, which keeps good.correlation with the mass level of aerosols and is restricted by the meteorological conditions with.higher level in the winter and lower in the summer. Mercury level of atmospheric suspending dust.are mainly controlled by the fly ash of coal combustion, which indicate that the consumption of.coal or the mercury level of coal must be cut down to reduce the levels of particulate mercury..The outcome of research of mercury pollution in the aerosols of Wuchuan mercury deposits.of Guizhou shows that the characteristics of mercury pollution in the aerosols of background point.4.(Daping) are different from that of mercury diggings. In Daping the particulate mercury are.mainly from the local dust and small particles. But the particulate mercury level of mercury.diggings are affected obviously by the gaseous mercury dispersed in the air. The particulate.mercury pollution caused by the smelting of mercury ore is relatively limited, but the gaseous.mercury emitted by the smelting factory will be absorbed by the particulate matter in the air so as.to affect the particulate mercury level seriously. However the affecting area of particulate mercury.pollution is relatively limited with different characteristics different from that of Daping..A systematic research on mercury pollution research has been carried out, which.could be a contribution to improve the level of mercury pollution research in China.

应用核地球物理勘查方法技术及微量元素地球化学理论，研究汞在气溶胶中的赋存状态、物相分布及吸附释放过程；研究汞污染元素浓度场在气圈中的时间、空间分布及迁移、转化规律。为污染防治及资源的可持续利用提供对策。初步建立环境地球物理污染元素浓度场的研究方法及技术，以促进物探工作向资源勘探和环境保护服务并重的方向转移。