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由于吸附作用,微量元素Co、Cu从海水中迁移到粒子表面,但是这两种元素的迁移机制可能相差很大。Co主要被Mn氧化物颗粒吸附,而有机化合物是Cu的主要载体相。因此,它们在海洋沉积物中将以不同途径进行活化转移。在缺氧环境下,这种活化转移途径的不同变得更为明显:在低氧环境,将促进Mn氧化物的还原作用,而有机碳得以保存。在缺氧海水之下的沉积物中,Co的迁移量增加,而Cu的却减少。这里报道的是南加利福尼亚海湾中,Co、Cu在缺氧海盆水中分布的观测结果。近海底Co的浓度比背景含量增加四倍,而Cu未增加。这些实测结果证实了元素在海洋循环的现存模式中的特征。
Due to the adsorption, the trace elements Co and Cu migrate from the seawater to the particle surface, but the migration mechanisms of these two elements may vary greatly. Co is mainly adsorbed on Mn oxide particles, whereas organic compounds are the predominant carrier phase for Cu. Therefore, they will be activated in different ways in marine sediments. The difference in this pathway of activation transfer becomes more pronounced in anoxic environments: in a hypoxic environment, the reduction of Mn oxides is promoted and organic carbon is preserved. In sediments under anaerobic seawater, the migration of Co increases while that of Cu decreases. Here is the report of the distribution of Co and Cu in the anoxic sea basin in the southern Gulf of California. The concentration of Co near the sea floor increased four times than the background level, while Cu did not increase. These measured results confirm the characteristics of the elements in the existing patterns of ocean circulation.