砷(AS)是一种没有生理功能,对植物、动物和人体健康有严重不利影响的有毒元素之一。人体可以通过多种途径接触和暴露于砷及其化合物,但以饮用被砷污染的水为主要暴露途径,在中国、印度、孟加拉国和墨西哥等国大约有4 500万居民饮用水砷浓度超标[1]。 Arsenic (AS) is one of the toxic elements that has no physiological function and has a serious adverse effect on plant, animal and human health. The human body can reach and expose arsenic and its compounds through various means. However, drinking water contaminated with arsenic is the main route of exposure. In some 45 million inhabitants of China, India, Bangladesh and Mexico, the arsenic concentration in drinking water exceeds the standard [1].