Determination of pesticide residues in bee honey and pollen grains with their potential human health risks in the Nile Delta, Egypt

A growing trend in understanding human health involves looking at the bigger picture by examining all potential environmental exposures that may cause health risks, with a particular focus on dietary intake of anthropogenic chemicals. This study investigated the presence of pesticide residues in honey and pollen samples collected randomly from ten locations in four agricultural governorates during the spring season of 2023 in the Nile Delta, Egypt. A QuEChERS extraction was employed for sample preparation before GC-MS analysis for pesticide residues. The human health risk associated with these residues were evaluated using hazard quotient (HQ). Our findings indicate that the detection rate and levels of pesticide residues are greater than previously reported. Giza governorate exhibited the highest content of residues in both honey and pollen samples, followed by El-Dakahlia, El-Qalyubia and Gharbia. Also, honey samples from El-Dakahlia, El-Qalyubia, and Giza contained the highest concentrations of aldrin, hexachlorocyclohexane (HCH) and chlorpyrifos, ranging from 10.45 to 19.6 mu g kg-1, 21.70 to 62.23 mu g kg-1, and 167.55 to 190.74 mu g kg-1, respectively. Pollen grain samples from Giza and El-Dakahlia showed high levels of chlorpyrifos (76.20 mu g kg-1) and HCH (33.60 mu g kg-1), respectively. Health hazard and quotient studies indicate that the residue levels of pesticides in all tested honey did not pose a significant risk for human consumption. Out of all pesticides, aldrin is the only one that requires further risk assessment to determine its potential impact on honeybee colonies.