Document Detail


Unexpected 226Ra build-up in wet-process phosphoric-acid plants.
MedLine Citation:
PMID:  6282784     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
During an investigation of the distribution of radium and uranium over the different process streams in phosphoric-acid production and in the nitrophosphate route, a higher than average radiation level was detected in the vicinity of some piping and vessels near the gypsum filtres. This higher radiation level is caused by radium, which, as a decay product in the 238U series, is present in very low concentrations (1-50 pCi 226R/g) in the phosphates used for fertilizer production. Specific research later on established that there were detectable radiation levels around vessels and piping in other phosphoric-acid works as well. It turned out that in all factories the filter part, and especially the washing-acid section showed the highest radiation-level. In the piping of the gypsum filter, through which the washing acid is discharged, a scaling of bariumsulphate and calciumsulphate with a higher radiumconcentration (+/- 0.1 Ci/g) is formed. The radium ions appeared to be incorporated in the bariumsulphate lattice, hence the solubility of the radium precipitate is very low. The danger of internal pollution, for example in cleaning operations by radio-active intake or inhallation of radon is very small in the cases described. The risk of external radiation can be prevented by periodically cleaning (every 1-3 yr) the equipment in which the radio-active scaling is formed.
Authors:
M H Lardinoye; K Weterings; W B van de Berg
Related Documents :
7125574 - Evaluation of a quantitative solid phase reagent system for determination of blood anal...
15877224 - A novel antioxidant agent caffeic acid phenethyl ester prevents shock wave-induced rena...
15797334 - Acetylecholinesterase-based biosensor electrodes for organophosphate pesticide detectio...
14151054 - Effect of uric acid on riboflavine production by intestinal coliform bacteria.
20377184 - Energetics and structure of nicotinic acid (niacin).
9660774 - Activities of recombinant human cytochrome p450c27 (cyp27) which produce intermediates ...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Health physics     Volume:  42     ISSN:  0017-9078     ISO Abbreviation:  Health Phys     Publication Date:  1982 Apr 
Date Detail:
Created Date:  1982-08-14     Completed Date:  1982-08-14     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  2985093R     Medline TA:  Health Phys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  503-14     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Chemical Industry*
Environmental Exposure
Fertilizers*
Humans
Netherlands
Phosphoric Acids*
Radiation Dosage
Radium*
Chemical
Reg. No./Substance:
0/Fertilizers; 0/Phosphoric Acids; 7440-14-4/Radium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Radon daughter equilibrium and unattached fraction in mine atmospheres.
Next Document:  Approaches to the diagnosis and treatment of tumors of the parapharyngeal space.