I need to common method of evaluation of heavy metals content and human health risk assessment via consumption of vegetables, fruits and drinks from Selected Markets.
Please review the following link:
Article Health Risk Assessment of Heavy Metals in Vegetables in an E...
You can calculate the estimated dietary intake of the metals in food and compare with recommended guidelines of provisional tolerable daily intake (PTDI) or PTWI as outlined by regulatory agencies. Other human health risk characterization tools include target hazard quotient (THQ), hazard index, carcinogenicity etc.
Risk assessment procedures are based on source-pathway-receptor models and
involves the examination of site characteristics, environmental behavior and toxicity of the contaminant, its potential route of entry into the receptor (humans), exposure of the receptors to the contaminants and their response to the dose.
"...This risk estimation method has recently been used by researchers (Chien et al., 2002; Wang et al., 2005) and proved to be valid and useful. An estimate of the potential hazard to human health (HQ) through consumption of vegetables grown on metal-contaminated soil was calculated using the equation below:
HQ=[Wplant]*[Mplant]/RfD*B
where [Wplant] is the dry weight of contaminated plant material consumed (mg d–1), [Mplant] is the concentration of metal in the vegetable(s) (mg/kg ), RfD is the food reference dose for the metal (mg/d ), and B is human body mass (kg)..."
Taken from: Assessing risk of heavy metals from consuming food grown on sewage irrigated soils and food chain transfer ( N. Sridhara Chary et al. 2008)
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