The study was conducted for the investigation of amount of radioactivity in the barren and cultivated soil of Bio saline Research Station in Pakka Anna, established by Nuclear Institute for Agriculture and Biology (NIAB) in 1990, 34 km. away from the city of Faisalabad, in the Punjab province of Pakistan. The studies were done on an area of about 100 hectares of two types of virgin and fertilized saline soils. The technique of gamma ray spectrometry was applied using HPGe (high purity germanium) gamma ray detector and a PC based MCA. Activity concentration levels due to 40K, 137Cs, 226Ra and 232Th were measured in 250 saline soil samples collected at a spacing of about 4 hectares at the depth level of 0ï¿½25 cm. with a step of 5 cm. depth. Activity concentrations ranges of the concerned radionuclides for both of the soils were as follows: 40K, for virgin and cultivated saline soil was 500-610.2 and Bqkg-1 560.2-635.6 respectively; 137Cs, 3.57-3.63 and 1.98-5.15 Bqkg-1238U, 26.3-31.6 and 30.3-38.7 Bq.kg-1, and 232Th, 50.6-55.3 and 50.6-64.0 Bqkg-1 respectively. The absorbed dose rate in air lies in the region 63--73 nGyh-1 and 68--83 nGyh-1 for virgin and fertilized soils respectively. This indicates that this region lies in the area of higher radiation background, while comparing with the worldsï¿½ average. The slightly higher value of dose in the fertilized farm may be due to the use of fertilizers for cultivation. Before the radiometric measurements, chemical analysis for concentration of Na, Ca and Mg was also carried out along with the measurement of electrical conductivity and pH of the soil samples.
Akhtar, N., M. Ashraf Chaudhry, M. Tifail, M. Mohsin Iqbal and S. D. Orfi., (2003). Radiometric and chemical
analysis of saline soil samples of Pacca Anna. Faisalabad, J. of Research., 14 (1), 49-59 (11 Pages)
Bhatti, T. M., (1994). Phosphate fertilizers a potential source
for Uranium recovery as by product. A technical report no Paec/NIBGE-2/1994. National institute for biotechnology and genetic engineering (NIBGE), Faisalabad.,
Brady, N. C., (1990). the nature and properties of soils. 10th. Ed.,Macmillan Publisher London. , 243-246 (4 Pages)
Hussain, A., (1994). Determination of uranium and thorium
concentration in rock samples. J. of radio analytical and Nuclear physics., 188 (4), 255-265 (11 Pages)
IAEA., (1989). Measurement of radionuclides in food and
environment. Technical reports series., (295)
Radhakrishna, A.P., H. M. Somashekarappa, Y.
Narayana, K. Sidappa., (1993). A new natural background radiation area on the southwest cost of India. Health Physics., 65 (4), 390-395 (6 Pages)Abstract
Selvasekarapandia, S., R.Sivakumar, N.M.
Manikendan, V. Meenakshisundaram and V.
Gajendran., (2000). Natural radionuclides distribution in
soils of Gudalore India. Applied radiation and isotopes., 52 (2), 299-306 (8 Pages), DOI: 10.1016/S0969-8043(99)00158-X. Abstract | Full Text (282 K)
Skorovarov, J. I., L. I. Rusin, A. V. Lomonsov, H.
Chaforian, A. Hashemi and H. Novaseqhi., (1996). Development of uranium extraction technology from phosphoric acid solutions with extract. Proceeding of international conference on uranium extraction from soil., 217, 106-113 (8 Pages)
Tufail, M., M. Iqbal and S. M. Mirza., (2000). Radiation doses due to natural radioactivity in Pakistan marble. Radioprotection., 35 (3), 299-310 (12 Pages), DOI: 10.1051/radiopro:2000110. Abstract
Tufail, M., S. Almakky, M. S. Zafar, and H. A. Khan., (1992). Natural radioactivity in the ceramics used in
dwellings as construction material. Scien. Total Environ., 127 (3), 243-253 (11 Pages), DOI: 10.1016/0048-9697(92)90506-N. Abstract | Full Text (803 K)
Tzortzis, M., H. Tsertos, S. Christofides, G.Christodoulides., (2003). Gamma ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks. Radiation Measurements., 37 (3), 221-229 (9 Pages), DOI: 10.1016/S1350-4487(03)00028-3. Abstract | Full Text (189 K)