CAJ | 학술논문

通过河床表层沉积物重金属释放实验，分析并揭示了受客水后河床表层沉积物中重金属Co、Cr、Mn、Mo、Pb、V的赋存形态转化机理。结果表明：受水区的环境条件（pH值、Eh值等）变化、沉积物理化性质变化和环境中微生物的作用，重金属生物有效态及残渣态之间的相互转化，改变了重金属的生物有效性，在受客水过程中受溶解沉淀、吸附解吸、氧化还原和离子交换等地球化学作用的影响，河床沉积物中重金属发生迁移转化，在不断受水条件下河床沉积物中重金属不断释放，沉积物不断净化。
통과하상표층침적물중금속석방실험，분석병게시료수객수후하상표층침적물중중금속Co、Cr、Mn、Mo、Pb、V적부존형태전화궤리。결과표명：수수구적배경조건（pH치、Eh치등）변화、침적물이화성질변화화배경중미생물적작용，중금속생물유효태급잔사태지간적상호전화，개변료중금속적생물유효성，재수객수과정중수용해침정、흡부해흡、양화환원화리자교환등지구화학작용적영향，하상침적물중중금속발생천이전화，재불단수수조건하하상침적물중중금속불단석방，침적물불단정화。
The chemical speciation transformation of heavy metals Co、Cr、Mn、Mo、Pb and V in sediments had been investigated through heavy met-als release experiment. The results show that the biologically effective of heavy metal have been changed due to the change of the water environmen-tal conditions (pH value and Eh value),physical and chemical properties of sediments,and action of microorganisms in sedimentary environment. For the geochemical role of dissolution and precipitation,adsorption and desorption,oxidation and reduction,and ion exchange,the heavy metal in sediments are migration and transformation. So,the heavy metal in sediments is releasing after water-received,and the sediment environment is pu-rifying continuously.