论文部分内容阅读
对九龙江河口区枯、丰水期水体中溶解态、颗粒态铀同位素地球化学行为的研究表明，溶解态铀与盐度存在良好的正相关关系，证实枯、丰水期该河口区水体中的铀均是保守行为。在低盐度区域（Ｓ＜１０），~２３８Ｕ主要以颗粒态形式存在，颗粒态~２３８Ｕ所占份额随盐度增加而降低。~（２３８）Ｕ之条件分配系数介于 １． ２ × １０~３～１． ５ ×１０~５ｄｍ~３／ｋｇ之间，它与盐度呈负相关关系，但与悬浮颗粒物浓度无相关关系存在。枯水期悬浮颗粒物上~２３４Ｕ／~２３８Ｕ_Ａ．Ｒ．与盐度的负相关关系为河口区悬浮颗粒物中~２３４Ｕ的优先沥取理论提供了有力的证据。
The study on the geochemical behavior of dissolved and particulate uranium isotopes in the dry and wet season water bodies in the estuary of Jiulong River shows that there is a good positive correlation between dissolved uranium and salinity, Uranium is a conservative act. In the low-salinity region (S <10), ~ 238U mainly existed in the form of granular state, and the share of ~ 238U in particulate state decreased with the increase of salinity. The conditional partition coefficient of ~ (238) U is between 1. 2 × 10 ~ 3 ~ 1. 5 × 10 ~ 5dm ~ 3 / kg, it has a negative correlation with salinity, but no correlation with the concentration of suspended particulate matter. Dry season on the suspended particles ~ 234U / ~ 238U_A. R. The negative correlation with salinity provides strong evidence for the preferential leaching theory of -234 U in suspended particulates in estuarine areas.