通过调查发现,张士灌区居民的血、尿中镉含量明显高于对照组,发镉虽较对照组高,但不明显,说明居民的健康已经受到影响。通过数学模型计算,长期摄食该地区生产的稻米则肾皮质镉临界浓度将超过世界卫生组织规定标准(200μg/g湿重),体负荷量增加,将能产生比较严重的结果。 According to the survey, the cadmium content in blood and urine of residents in Zhangshi irrigation area was significantly higher than that in control group, while the incidence of cadmium was higher than that in control group, but not obvious, indicating that residents’ health has been affected. According to the mathematical model, the critical concentration of cadmium in renal cortex will exceed the WHO standard (200μg / g wet weight) when long-term ingestion of rice produced in this area. The increase of body weight will produce more serious results.