纳米粒子在大亚湾痕量金属迁移和转换过程中的重要作用

Significance of Colloids in the Transport and Transformation of Trace Metals at Daya Bay

利用切向超滤技术对大亚湾纳米粒子 (0 .4 5μm～ 10 3 Daltons)进行了有效分离 ,并计算其回收率。测定了大亚湾胶体态和溶解态 (<10 3 Daltons)痕量金属 (Cu、Pb和 Cd)的含量。平均来说 ,14% Cu、2 0 % Pb和 2 4 % Cd实际上与胶体物质密切相关 。

Cross-flow ultrafiltration techniques have been used to extract colloids (0.45μm^103Daltons) at Daya Bay and the recoveries were calculated. We determined the concentration of Cu,Pb and Cd in colloidal and dissolved (<103Daltons) trace metals. On average, approximately 14%Cu,20%Pb and 24%Cd were actually associated with colloid,which confirmed that the significant role of colloidal materials in the transport and transformation of trace metals.