The buffering effects of aquatic sediments against acidic deposition  

作　　者：Liao Bohan Tang Hongxiao(Researeh Center for Eco-Environmental Sciences. Chinese Academy of Sciences, Beijing 100085, China) 

出　　处：《Journal of Environmental Sciences》1994年第1期21-28,共8页环境科学学报（英文版）

摘　　要：The cation exchange and the chemical weathering are two important processes for sedi-ments to buffer the acidification of surface water. In this paper, for sediments these two processeshave been studied. The relationship between BFC of sediments and ANC of the surface waters andthe weathering characteristics of sediments were discussed. The buffering effect and mechanism of sedi-ments against acidic deposition have also been studied. The results show that BFC of sediments arepositively correlative to ANC of the surface waters. the chemical weathering rate of sediments can beexpressed as R=k×[H￣ +]￣m.The cation exchange and the chemical weathering are two important processes for sedi-ments to buffer the acidification of surface water. In this paper, for sediments these two processeshave been studied. The relationship between BFC of sediments and ANC of the surface waters andthe weathering characteristics of sediments were discussed. The buffering effect and mechanism of sedi-ments against acidic deposition have also been studied. The results show that BFC of sediments arepositively correlative to ANC of the surface waters. the chemical weathering rate of sediments can beexpressed as R=k×[H￣ +]￣m.

关 键 词：acidic deposition  sediment  surface water cation exchange  chemical weathering. 

分 类 号：X517[环境科学与工程—环境工程]