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1961年日本发现一种病因不明的疾病—“骨疼病”。1968年确定是食用含镉大米引起的。以后研究表明:镉除了破坏人体骨骼引起“骨疼病”外,还可损害人体肾、心、肝和睾丸等并发多种不易治愈的疾病,所以它是人类生态环境中的一种重要污染物。我国上海、沈阳、北京、株洲、秦皇岛、西安、成都和兰州都有镉污染的报告。就北京而言,近郊污水灌区已有数十万亩农田受到不同程度镉污染,土壤与麦粒中镉的最高检出量分别为6.8与0.23ppm,前者已超过日本规定的环境允许值(1.0ppm),后者已接近食用卫生标准(0.4
In 1961 Japan found a disease of unknown etiology - “bone pain.” 1968 is determined to be caused by consumption of cadmium-containing rice. Subsequent studies have shown that: cadmium can damage human body skeleton and cause “bone pain”, but also can damage human kidney, heart, liver and testis and other diseases that are not easily cured, so it is an important pollutant in the human ecological environment . China’s Shanghai, Shenyang, Beijing, Zhuzhou, Qinhuangdao, Xi’an, Chengdu and Lanzhou have cadmium pollution report. In the case of Beijing, hundreds of thousands of mu of farmland have been polluted by cadmium to varying degrees in suburb sewage irrigation areas. The highest detection levels of cadmium in soils and grains are 6.8 and 0.23 ppm, respectively. The former has surpassed Japan’s environmental allowance (1.0 ppm), which is close to the edible health standard (0.4