Distribution and enrichment of 210Po in the environment of Kaiga in South India

被引:55
作者
Karunakara, N [1 ]
Avadhani, DN
Mahesh, HM
Somashekarappa, HM
Narayana, Y
Siddappa, K
机构
[1] Mangalore Univ, Univ Sci Instrumentat Ctr, Mangalore 574199, Karnataka, India
[2] Mangalore Univ, Dept Studies Phys, Mangalore 574199, Karnataka, India
[3] Bangalore Univ, Bangalore 560065, Karnataka, India
关键词
radioactivity; environment; polonium; bioindicators; alpha-counting;
D O I
10.1016/S0265-931X(00)00094-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Several soil and vegetation samples from the environment of Kaiga nuclear power plant site in the south western region of India were analysed for Po-210. The vertical profile, particle-size distribution, seasonal variation and the dry deposition rate of Po-210 were measured employing the chemical method and alpha - counting technique. Po-210 activity in soil varies from 17.1 to 228.2 Bq kg(-1) with a mean value of 83.3 Bq kg(-1). The activity of Po-210 is higher in the surface soil (0-5 cm) and decreases as depth increases to 20 cm and remains nearly constant thereafter. The activity concentration is almost uniform in the grain sizes of 350-177 mu m and below 177 mu m. Pterobryopsis tumida (Hook.) Dir, a plant of the moss family, shows a very high level of Po-210 activity - 2724 +/- 13 Bq kg(-1). Seasonal variation studies show elevated levels of Po-210 in vegetation during winter. The annual dry deposition rate of Po-210 was 53.4 Bq m(-2) yr(-1). (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:349 / 362
页数:14
相关论文
共 27 条
[1]   STUDIES ON THE ACTIVITY RATIOS OF PO-210 TO PB-210 AND THEIR DRY-DEPOSITION VELOCITIES AT BOMBAY IN INDIA [J].
ANAND, SJS ;
RANGARAJAN, C .
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 1990, 11 (03) :235-250
[2]   POLONIUM-210 ANALYSES OF VEGETABLES CURED AND UNCURED TOBACCO AND ASSOCIATED SOILS [J].
BERGER, KC ;
ERHARDT, WH ;
FRANCIS, CW .
SCIENCE, 1965, 150 (3704) :1738-+
[3]   USE OF LONG-LIVED NATURAL RADIOACTIVITY AS AN ATMOSPHERIC TRACER [J].
BURTON, WM ;
STEWART, NG .
NATURE, 1960, 186 (4725) :584-589
[4]  
DEAN JR, 1982, NATURAL RAD ENV, P67
[5]  
ERMOLAEVAMAKOSK.AP, 1969, THESIS
[6]  
HASANEN E, 1972, REPORT SERIES RADIOC
[7]   POLONIUM-210 IN MAN [J].
HILL, CR .
NATURE, 1965, 208 (5009) :423-+
[8]  
HILL CR, 1960, NATURE, V184, P667
[9]  
HOLM E, 1982, NATURAL RAD ENV, P85
[10]   PLANT ACCUMULATION AND PLANT-SOIL CONCENTRATION RATIOS OF PB-210 AND PO-210 AT VARIOUS SITES WITHIN A URANIUM MINING AND MILLING OPERATION [J].
IBRAHIM, SA ;
WHICKER, FW .
ENVIRONMENTAL AND EXPERIMENTAL BOTANY, 1987, 27 (02) :203-213