Abstract: Objective To investigate and analyze the content and pollution status of lead(Pb),total mercury(Hg),total arsenic(As) and cadmium(Cd) in the rice produced in northern Fujian,and to conduct health risk assessment. Methods Totally 300 locally grown fresh rice samples were collected from 10 counties and cities in northern Fujian from July to November 2024. Thelead,total mercury,total arsenic and cadmium were detected and analyzed according to GB 5009.268-2016 "Determination of many elements in food" and GB 5009.17-2021 "Determination of total mercury and organic mercury in food".The monitoring data of heavy metal indexes of lead,total mercury,total arsenic and cadmium were selected,the heavy metal pollution index was evaluated by the single factor pollution index Pi and the Nemero comprehensive pollution index P,and the health risk of human rice intake was evaluated by the health risk assessment model of chemical carcinogens. Results The mean contents of lead,total mercury,total arsenic and cadmium in 300 self-produced rice samples were 0.026、0.004、0.106 and 0.048 mg/kg,respectively. The single factor pollution index and Nemero comprehensive pollution index were less than 1.0,indicating that the four heavy metals in rice were at a safe level. The total target hazard factor(TTHQ) and the total target carcinogenic risk factor(TTCR) were less than the values recommended by the International Commission for Radiation Protection(ICRP)(5×10^-5 /year),and the population health risk was at an acceptable level. Conclusion The total arsenic,total mercury,lead and cadmium mercury in rice in northern Fujian is basically within the national limit standard,but it is still necessary to pay attention to the potential risks,and farmland environmental protection and rice quality monitoring should be strengthened.

Key words: Rice, Heavy metals, Pollution, Health risk assessment