We can extract mercury from cinnabar by heating it in air. We can also extract silver from silver oxide by heating.

我们可以在空气中把朱砂加热来提取汞。我们亦可以把氧化银加热来提取银。

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The speciation distribution of mercury in flue gas became very different when adding limestone. The concentration of oxide Hg became obviously lower after adding limestone.

添加石灰石后烟气中汞的形态分布变化较大，烟气中单质态汞的含量大大降低；

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The Indiana-based utility is investing in the required equipment to reduce its sulfur dioxide, nitrogen oxide and mercury pollution.

FORBES: Coal Plants Belching Out Less Mercury

The national temperament is changing with the U.S. Congress enacting tougher rules on sulfur dioxide, nitrogen oxide and mercury while the U.S. Environmental Protection Agency is beginning to clamp down on greenhouse gases.

FORBES: A Wounded Coal Industry Seeks To Unseat A Rockefeller Who Turned On Them

Cheap gas and environmental legislation under the Clean Air Act, aimed at emissions of sulphur dioxide, nitrous oxide and mercury (but not carbon dioxide) from dirty coal plants, accelerated a trend that is set to continue.

ECONOMIST: America��s bounty: Gas works | The