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由于我国大量工业废渣的堆放方式原始、粗放,导致了大量重金属离子和有毒有害元素在自然环境中极易迁移并造成污染。为了掌握废渣中硒在多重氧化态中含量及形态,采用改进的SES法,连续浸提了废渣样品中硒的水溶态、交换态、酸溶态、有机态、单质态及残渣态,以ICP-MS测定提取液中总硒含量,同时,利用HPLC-ICP-MS研究了硒的形态。研究表明:CCT动态反应碰撞模式能有效降低多原子离子检测的干扰,优化ICP-MS检测环境;工业废渣中的硒含量极高,在自然环境中易发生迁移,尤其是酸性环境下;前三态的硒含量超过了总硒的50%,且主要以毒性较高的亚硒酸盐形式存在,小部分以硒酸盐形式存在,含硒工业废渣存在较大的潜在环境风险。
As a large number of industrial waste dumping in China original, extensive, resulting in a large number of heavy metal ions and toxic and harmful elements in the natural environment easily migrate and cause pollution. In order to grasp the contents and forms of selenium in multi-oxidation state, the improved SES method was used to continuously extract the water soluble, exchangeable, acid soluble, organic, elemental and residual forms of selenium in the waste residue samples. ICP -MS determination of total selenium content in the extract, the same time, the use of HPLC-ICP-MS selenium morphology. The results show that CCT dynamic collision mode can effectively reduce the interference of polyatomic ion detection and optimize ICP-MS detection environment. The industrial waste residue has high selenium content and easily migrates in natural environment, especially in acidic environment. The first three The state of selenium content of more than 50% of the total selenium, and the main form of higher selenite toxicity exists, the small part of the existence of selenate form, selenium containing industrial waste larger potential environmental risks.