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Position: Home > Articles > DYNAMICS OF ACCUMULATION AND DISAPPEARANCE OF ZIRCONIUM-95 IN WATER-SOIL SYSTEM Acta Pedologica Sinica 2002,39 (6) 830-835

~(95)Zr在水—土体系中的消长动态研究

作  者:
史建君;陈晖;刘立丽
单  位:
浙江工程学院信息电子学院;浙江大学原子核农业科学研究所(华家池校区)农业部核农学重点开放试验室
关键词:
95Zr;水—土体系;消长动态;非线性回归;置信区间;置信水平;放射生态学
摘  要:
采用同位素示踪技术进行了95Zr在六种水—土体系中的消长动态研究 ,并应用非线性回归方法确定了各体系的拟合方程。结果显示 :1 .水体中的95Zr比活度起初随时间呈快速下降 ,而后逐渐趋缓 ,不同水—土体统中的下降速率各不相同 ,表明底泥对95Zr有强烈的吸附作用 ,其吸附强弱顺序为 :泮畈红壤 >海盐红壤 >青紫泥 >小粉土 >海泥 >黄沙 ;2 .底泥中95Zr的比活度随时间呈同步增加 ,并在经历一段时间后达到一平衡值 ,不同底质土壤达到平衡的时间各不相同 ,其平衡时间的大小顺序为 :海盐红壤 (1 3.1 0d) <泮畈红壤 (1 5 .53d)<黄沙 (1 5 .64d) <青紫泥 (1 7.85d) <小粉土 (2 0 .65d) <海泥 (2 1 .46d) ;3 .对各体系的消长动态拟合方程进行方差分析 (测定系数r2 、置信区间 ) ,表明各回归方程较好地反应了95Zr在水体和底质土壤中的行为过程。
译  名:
DYNAMICS OF ACCUMULATION AND DISAPPEARANCE OF ZIRCONIUM-95 IN WATER-SOIL SYSTEM
作  者:
Shi Jian jun 1 Chen Hui 2 Liu Li li 1 (1 Key Lab. of Nuclear Agricultural Science, the Ministry of Agriculture, Institute of Nuclear Agricultural Science, Zhejiang University, Hangzhou 310029; 2 College of Informatics and Electronics, Zhejiang Institute of Science and Technology, Hangzhou 310033)
关键词:
Zirconium 95, Water soil system, Dynamics of accumulation and disappearance, Nonlinear regression, Confidence interval, Confidence level, Radioecology
摘  要:
The dynamics of accumulation and disappearance of 95 Zr in six kinds of water soil systems was studied by using isotope tracer technology, and the fitting equation was confirmed by application of nonlinear regression method. The results showed. 1.The specific activity of 95 Zr in water was reduced quickly in the beginning and then tended to slow down gradually. The descend velocity differed from one water soil system to another. This indicated that the sludge of riverbed had strong capability of adsorption to 95 Zr which was as follows: panfan red soil>red yellow earth>blue purple clay>paddy soil>sea mud> sand. 2.The specific activity of 95 Zr in sludge of riverbed increased synchronously with time and reached a counterbalance after a period of time. The balancing time of different soils differed in the following order: red yellow earth(13.10d)

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