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《Acta Agriculturae Nucleatae Sinica》 2004-01
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STUDY ON ENVIRONMENTAI TOXICOLOGY AND SAFETY OF RARE EARTH ELEMENTS ~(147)Pm, ~(141)Ce and ~(147)Nd BY RADIONUCLIDE TRACER TECHNIQUE

CHEN Zu-yi (Nanjing Agricultural University, Nanjing,Jiangsu 210095)  
The enviromental behaviour, bioconcentration of rare earth elements and their effects on animal gonad were studied by radionuclide tracer technique. The results indicated that (1) the 147Pm, 141Ce and 147Nd had strong adsorptivity in soil, so they were hard to transfer and easily accumulated in soil or sediment; (2) all the organisms (5 aquaties and 4 eatable plants) tested showed apparent 147Pm concentrating capabilities; (3)the residues of 147Pm, 141Ce and 147Nd were unevenly distributed in the animal's viscera and tissues, higher residues were found in bone, marrow, eye, brain, heart, adipose and testis, showing selective accumulation; (4) with intraperitioneal dosing of Nd or Ce 200mg ·kg -1 apparent inhibition to gonadial hormone (testosterone or progesterone) secretion in mice was found and with 200 and 800mg·(kg·d) -1 of Ce added in feed, the malformation rate of spematozoon showed higher. From the cumulative impact comparison between environment prior pollutants, accumulation effect of rare earth elements(RE) in animal's viscera and tissues and their natural radionuclide of RE were investigated on the safety of agricultural use of RE for eco-environment.
【Fund】: 国家自然科学基金资助项目 ( 3 9670 417)
【CateGory Index】: S124
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