Table 5

Cadmium (Cd) and Lead (Pb) concentrations (mg/kg) in edible plants from the study area: Seasonal variation (summer vs. winter) vs. FAO/WHO Codex maximum levels (MLs)

SitesSummer seasonWinter season
PlantCdLimits*PbLimitsPlantCdLimitsPbLimits
1Maize stalks1.206.90Wheat grains0.300.26.700.2
2Maize grains0.060.10.660.2Onion bulb0.560.15.300.1
3Eggplant fruits0.140.056.760.1Clover0.306.50
4Sesame plant0.280.14.380.2Onion bulb0.600.15.700.1
5Molokheya leaves0.440.26.600.3Wheat grains0.300.27.400.2
6Rice grains0.600.44.800.2Turnip plant1.000.28.30.1
7Maize grains0.310.12.800.2Cabbage leaves0.300.21.100.3
8Rice grains0.240.45.900.2Beans grains0.300.15.900.2

Note(s): *Maximum allowable limits (Maximum Levels, MLs) for Heavy Metals in Food Crops based on the FAO/WHO Codex Alimentarius (General Standard for Contaminants and Toxins in Food and Feed, CODEX STAN 193–1995). These limits apply to key heavy metals of concernLead (Pb)Cadmium (Cd)Arsenic (As), and Mercury (Hg). The FAO/WHO Codex Alimentarius does not set international Maximum Levels (MLs) for Fe, Mn, Zn, Cu, Co, Ni, or Cr in food crops due to scientific, nutritional, and risk-based principles

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