The bioaccessibility of essential and potentially toxic trace elements in tropical soils from Mukono District, Uganda

• DOI: 10.1144/jgs.157.4.885
• Publication Date: 2010-06-10T20:48:47Z
• Authors: B. SMITH; B. G. RAWLINS; M. J. A. R. CORDEIRO; M. G. HUTCHINS; J. V. TIBERINDWA; L. SSERUNJOGI; A. M. TOMKINS
• Keywords: Pica (typography); Trace element

It has been postulated that endomyocardial fibrosis (EMF), a common cardiac disease in certain tropical communities including parts of Uganda, may be related to the presence elevated levels dietary Ce, and deficient Mg. In significant variation exposure both elements is likely due variations local soil geochemistry habits, geophagia (the deliberate consumption soil). This paper reports concentration bioaccessibility (determined from physiologically based extraction test—PBET) Ce other essential (Mg Fe) trace soils Mukono district Uganda. Trace element concentrations varied markedly between samples (ground soils) eaten deliberately, such as termite nest traditional herbal–soil remedies. The highest values were reported for chelate-rich, intestinal phase PBET. Median percentage (1–15%), Mg (7–33%), Fe (0.1–2.9%) considerably, but generally higher geophagic (herbal–soil remedies terminte than (ground) samples. Only case does ingestion account major proportion recommended daily intake (RDI). revised estimates (based on data rather an assumption 100% bioavailability) significantly reduced importance relative through food water.