Based on the hindered settling phenomena of the Yellow River high-turbidity water with polymer flocculant, this article discusses the interaction between silt particles from the Yellow River and molecule chain of the polymer, and the model of specific surface area in the flocculating process of the Yellow River silt particles.

The dry deposition velocities of SO_(2)and SO_4~(2-) in the coastal area of Qingdao in 2003 were calculated using models appropriate to each species of the contaminants,and the contributions of the transfer resistances to the dry deposition were also evaluated.

Dry deposition of SO2 is 70%～90% of the total dry deposition and wet deposition of SO42- is 1～9 times higher than wet deposition of SO2.

The seasonal variation of total suspended particles (TSP), size distribution and dry deposition in Qingdao are also studied.

Seasonal variation and spatial distribution of the dry and wet deposition fluxes of the airborne particulate PAHs in Pearl River Delta (PRD) region were reported.

This review describes fluxes of mercury exchange at the soil-air interface during the past twenty years,including existing forms of mercury in air and soil,the dry and wet deposition of atmospheric mercury,the emission of mercury from soil,and the (influence) factors of mercury fluxes.