Long-term leaching and volatilization behavior of stabilized and solidified mercury metal waste
Long-term leaching and volatilization behavior of stabilized and solidified mercury metal waste
复制标题
稳定固化汞金属废物的长期浸出和挥发行为
DOI：
10.1007/s10163-020-01170-8
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发表时间：
2021
影响因子：
3.1
通讯作者：
T. Ishigaki
中科院分区：
文献类型：
--
作者：
H. Ishimori;R. Hasegawa;T. Ishigaki
随着《水俣公约》的签署，预计在不久的将来，汞金属废物将得到广泛处置。由于其对环境的影响，汞金属废物在处置前必须以硫化汞的形式稳定化，和/或用聚合物或水泥固化，以减少沥滤和挥发。本研究探讨了汞废物经处理后的长期浸出和挥发行为。汞金属废物样本用硫化物稳定，随后用硫聚合物或三种低碱性水泥之一固化。从固化的汞金属废物标本的长期浸出率以及pH值和温度对浸出行为的影响进行了评估。计算了不同温度下气态汞的长期挥发速率。建立了汞的浸出、挥发速率及其参数的数学模型，以预测稳定化、固化的废弃汞在填埋场的长期行为。
With the signing of the Minamata Convention, widespread disposal of mercury metal waste is anticipated in the near future. Due to its environmental effects, mercury metal waste must be stabilized prior to disposal as its mercuric sulfide form and/or solidified with a polymer or cement to reduce leaching and volatilization. This study investigates the long-term leaching and volatilization behaviors from processed mercury waste. Mercury metal waste specimens are stabilized with sulfide and subsequently solidified with either a sulfur polymer or one of three types of low-alkaline cement. The long-term leaching rates from the solidified mercury metal waste specimens as well as the effects of pH and temperature on leaching behavior are evaluated. The long-term volatilization rates of gaseous mercury are also calculated at different temperatures. Mathematical models for mercury leaching, volatilization rates, and their parameters are established to predict the long-term behavior of stabilized, solidified waste mercury in landfill sites.