Document Details

Document Type : Thesis 
Document Title :
Radon Exhalation and Examination of Secular Equilibrium between Uranium and Radium in Fertilizer Samples
انبعاث الرادون واختبار الاتزان بين اليورانيوم والراديوم في عينات من السماد
 
Subject : Faculty of Sciences 
Document Language : Arabic 
Abstract : 226Ra and its immediate daughter 222Rn are members of the natural decay series that starts with 238U. In an ideal situation 226Ra should be in secular equilibrium with 238U, but this equilibrium is usually disrupted because of leaching of a member or more of the decay series out of the equilibrium system. 222Rn is a noble alpha emitter gas. Its gaseous nature allows it to diffuse from its containing medium and escape to the atmosphere. Along with this property its alpha radioactivity makes radon a potential health risk. Radon emanation is examined in many instances to assess its concentration and potential exposure risks. This allows installing preventive measures to minimize risks associated with exposure to radon. Phosphate fertilizers are usually manufactured from phosphatic rocks and/or phosphoric acid along with other ingredients. Phosphate ores contain uranium in general, sometimes in significant amounts. Therefore, risk of radon exposure is a factor that has to be considered when dealing with phosphate base products. In this study uranium concentration in fertilizer samples was determined and was found to be in the range of 0 – 252.37 Bq.kg-1. Effective 226Ra and 222Rn exhalation rates were determined using CR-39 nuclear track detector EA, the exhalation rate based on exposed area was found lei in the range (0.044-0.351) Bq.m-2.h-1. EM, the exhalation rate based on the mass of the fertilizer was found be to in the range (0.023-0.180) Bq.Kg-1.h-1. Comparison with values in literature revealed good agreement with reported values. 
Supervisor : Dr. Mohammad Wazeer Kadi 
Thesis Type : Master Thesis 
Publishing Year : 1431 AH
2010 AD 
Added Date : Wednesday, July 21, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ذياب علي الإريانيAl-Eryani, Dheyab AliResearcherMaster 

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