云南某砷矿区冶炼渣中Hg存在形态研究

利用BCR三步提取法提取砷冶炼渣中Hg的铁锰氧化物结合态、可交换态及碳酸盐结合态、有机物及硫化物结合态，再以高压密闭消解法分离出矿渣中的Hg元素，采用原子荧光光度法测定Hg的总含量，最后计算出残渣态Hg含量。结果表明，云南某砷矿废矿场中汞的存在形态主要是铁锰氧化物结合态、可交换态及碳酸盐结合态，这两种形态的Hg含量超过总含量的85％；有机物及硫化物结合态和残渣态的含量所占比例较小。

Morphological Research of Hg in Arsenic Smelting Slag of One Mining Area in Yunnan

The three- step BCR extraction method is used to extract the Hg in different morphological conditions （iron manganese oxide combination, exchangeable, carbon bounded form and organic and sulfide bounded state）. Then the element of Hg is separated by high - pressure closed digestion, and its total content is determined by atomic fluorescence spectrophotometry. Finally the content of Hg in the remnant slag is calculated. The result shows that the mercury in this discarded arsenic mining site is mainly in the form of iron manganese oxide combination and exchangeable bounded carbon. The content of Hg in these two forms accounts for 85% of the total content. The content of the other forms of the mercury is in a very small proportion.