ĐÁNH GIÁ NGUY CƠ PHƠI NHIỄM VÀ CHỈ SỐ LIỀU LƯỢNG RỦI RO CỦA CHÌ (Pb) TỪ GẠO TẠI MỘT SỐ LÀNG NGHỀ TÁI CHẾ KIM LOẠI TỈNH BẮC NINH

This study was carried out in Van Mon and Chau Khe commune, Bac Ninh province, where crops have been being affected by wastewater, smoke and dust from 2 of the biggest metal recycling villages in Red river delta for a long time. Research results indicated that Pb of polished rice was regarded to be in a normal range as comparing with Proposed Maximum Levels of FAO/WHO, EC and Pb MAC of Vietnam MOH. However, mean Pb concentration in rice from recycling villages were higher by than that in “reference/control” sites. Average Weekly Dose (AWD) of Pb from rice in people living in recycling villages was 3.09 and 1.74 μg/kgBW/week that was 2 times higher than in “reference/control” sites, but not exceeded the PTWIs recommended by JECFA/WHO-FAO. Hazard quotient index (HQI; defined as the ratio of actual daily intake to ‘safe’ daily intake) for dietary Pb for the contaminated sites were 2 times higher than in the “reference/control” sites but less than PTWI (Provisional tolerable weekly intake) of Pb, indicating that actual intake was within ‘safe’ limits...