title: Dissolution characteristics of 226Ra from phosphogypsum.
abstract: The paper presents the results of the dissolution characteristics of 226Ra from phosphogypsum, a by-product from phosphate fertilizer industries. Leachability of 226Ra in distilled water and rainwater have been examined under different leaching conditions such as contact time, solid:liquid ratio and simulating natural conditions. The concentration of 226Ra activity in the leachates ranged from 0.07 to 0.53 Bq l(-1). Study indicated that leaching of radium may be slow in field conditions near the phosphogypsum stock piles.
authors.affiliation: Environmental Assessment Division, Bhabha Atomic Research Centre, Health Physics Unit, Indian Rare Earth Ltd, Kerala, India. irered@vsnl.com
authors.forename: P P
authors.initials: PP
authors.lastname: Haridasan
authors.forename: C G
authors.initials: CG
authors.lastname: Maniyan
authors.forename: P M B
authors.initials: PM
authors.lastname: Pillai
authors.forename: A H
authors.initials: AH
authors.lastname: Khan
mesh_terms: D002133:Calcium Sulfate / Q000737:chemistry*; D005308:Fertilizers; D010758:Phosphorus / Q000737:chemistry*; D011886:Radon / Q000032:analysis* / Q000737:chemistry; D012995:Solubility
chemical_list: D005308:Fertilizers; C077769:phosphogypsum; D010758:Phosphorus; D011886:Radon; D002133:Calcium Sulfate