Activities of ~(210)Po and ~(210)Pb in the water column at Kuala Selangor, Malaysia

摘要

Natural radionuclides, such as ~(210)Po and ~(210)Pb were measured in the water samples collected from six stations at Kuala Selangor, Malaysia. Results for ~(210)Po and ~(210)Pb in dissolved and particulate phases have showed the difference in distribution and chemical behavior. The fluctuation activities of ~(210)Po and ~(210)Pb depend on wave action, geology and degree of fresh water input occurring at study areas and probably due to different sampling dates. The distribution coefficient, K_d, values of ~(210)Po and ~(210)Pb ranged from 2.0 X 10~3 l g~(-1) to 265.15x 10~5 lg~(-1), and from 3.0X10~3 lg~(-1) to 558.16 X 10~5 lg~(-1), respectively. High K_d values of ~(210)Po and ~(210)Pb indicated that a strong adsorption of ~(210)Po and ~(210)Pb onto suspended particles, and the sinking of both nuclides on the seabed at study locations were controlled by the characteristics of suspended particles.