Manganese biological half-life

Mahoney JP, Small WJ. 1968. Studies on manganese III. The biological half-life of radiomanganese in man and factors which affect this half-life. J Clin Invest 47 643-653. 

Study of the biological half-life of Mn in humans shows that manganese disappears from the body of a normal adult in a manner best described as having slow (accounting for 70% in 39 days) and fast (30% in 4 days) elimination pathways [51]. 

BIOLOGICAL PROPERTIES will persist until natural alkalinity precipitates as oxide attaches to small particulates in air and remains for many days most ends up in soil and attaches to particulates containing iron, manganese, or aluminum found in low levels in rivers, lakes, and streams 35 ppt of salinity 0.3 pg/L in seawater and at 1.1 pg/L in freshwater streams highly persistent in water with a half-life of longer than 200 days can be detected in water by atomic absorption 0.2 pg/L found in tap water found in some foods in the parts per million range... 

BIOLOGICAL PROPERTIES particles in the air settle to the ground or are taken out in rain attaches to particles that contain iron or manganese and is therefore found with soil and sediments highly persistent in water, with a half-life > 200 days can be detected in water by atomic adsorption or by colorimetric determination or by inductively coupled plasma optical emission spectrometry, dissolved nickel by 0.45 micron filtration prior to such analysis... 

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