摘要:
<正> 由于同位素示踪技术具有独特的优点,因此广泛地应用于环境科学技术领域。将放射性同位素合成于被研究的物质分子中作为标记示踪剂。将示踪剂加入所研究的体系中,它将随同类物质一起运动或变化(如污染物在生物链中的迁移)。利用同位素示踪剂的辐射性能,可用放射性探测器定量测定,从而显示出它们的位置及含量而被追踪。放射性示踪技术具有灵敏度(10~(12)—10~(-9)g)高;不破坏样品,甚至使生物体在正常生理条件下,研究物质在生物体内的变化规律;以及测定简便、快速、有的可就地测量等优点。节省人力物力有较好的经济效
Abstract:
The paper introduces our achievements in the application of radioisotopic tracer techniques to: (1) the study on the migration of calcium in soil with ~(45)Ca, (2) studies of adsoption, migration and persistence of toluene and ethylene dichloride in soil using ~(14)C labelled compound, (3) study on the biodegradation pathway of Terephthalic Acid in anaerobic reactor using double-labelling method, (4) the uptake, transmission and release of ~(18)F in Tilapin fish, (5) the determination of the filtration velocity, flow direction and dispersion coefficient in the groundwater with ~(131)I, in order to predict the pollution of groundwater, and (6) the measurement of flow distribution in an upflow anaerobic sludge blanket reactor using ~(131)I.
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