AI Article Synopsis
- The rapid population growth and urbanization in northern Tanzania, particularly in Arusha, has led to increased urban agriculture, with many families relying on backyard chickens for income through egg sales.
- A study conducted in 2011 analyzing 159 eggs revealed significant contamination levels of persistent organic pollutants (POPs), including dieldrin and ΣDDT, with some samples exceeding EU safety limits.
- Other contaminants such as brominated flame retardants (BFRs) and dioxins were also detected, raising concerns about potential health risks associated with the consumption of these eggs, particularly from open fires used for cooking or heating.
Article Abstract
The environment in the northern part of Tanzania is influenced by rapid population growth, and increased urbanization. Urban agriculture is common and of economic value for low income families. In Arusha, many households sell eggs from free-ranging backyard chicken. In 2011, 159 eggs from different households in five different locations in Arusha were collected, homogenized, pooled into 28 composite samples and analyzed for a wide selection of POPs. Levels of POPs varied widely within and between the locations. The levels of dieldrin and ΣDDT ranged between 2 and 98,791 and 2 and 324ng/g lipid weight (lw), respectively. EU MRLs of 0.02mg/kg dieldrin for eggs were exceeded in 4/28 samples. PCBs, HCHs, chlordanes, toxaphenes and endosulfanes were found at lower frequency and levels. Brominated flame retardants (BFRs), e.g polybrominated diphenylethers (PBDEs), hexabromocyclododecane (HBCD) and 1,2-bis(2,4,6-tribromphenoxy)ethane (BTBPE) were present in 100%, 60% and 46% of the composite samples, respectively. Octa-and deca-BDEs were the dominating PBDEs and BDE 209 levels ranged between
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http://dx.doi.org/10.1016/j.scitotenv.2016.02.021 DOI Listing Publication Analysis
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