Presence of natural radionuclides and toxic elements in monocalcium phosphate, complete feed and pig manure

The Science of the Total Environment
Borjana VranješBranislava M Mitrović

Abstract

Naturally occurring radionuclides and toxic elements are ubiquitous in the environment and can pose a great risk to animals' health. Control of these toxic substances in animal diet is essential for animal's welfare, human nutrition risk management as well as environmental protection. Our study addresses these issues by determining a content of natural radionuclides (40K, 238U and 226Ra), and toxic elements (Cd, Cr, As) in total of 108 samples: 36 monocalcium phosphate, 36 complete feed and 36 pig manure samples that were collected from 6 different commercial farms in the Republic of Serbia. In monocalcium phosphate the content of 40K, 238U and 226Ra ranged from 7.6-23.4 Bq kg-1, 13.2-1778 Bq kg-1 and 3.6-13.5 Bq kg-1, respectively. In complete feed samples, 40K ranged from 170 to 306 Bq kg-1, 238U from minimum detectable activity (MDA) to 9.1 Bq kg-1, and 226Ra from MDA-5.5 Bq kg-1, while in pig manure 40K ranged from 146 to 531 Bq kg-1, 238U from MDA-30.1 Bq kg-1, and 226Ra from MDA-10 Bq kg-1. The concentrations of Cd, Cr and As in monocalcium phosphate were 0.26-14.9 mg kg-1, 10.3-497 mg kg-1, and 4.2-5.5 mg kg-1, respectively. In complete feed, the content of Cd, Cr and As ranged from minimum detectable concentration (MDC)...Continue Reading

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