Coal is the filthiest fossil fuel Coal contains sulfur. toxic heavy metals, and Scrubbed gas to atmosphere radioactive isotopes Extracting coal from the Spray tower ground is harmful to human health and to the Caco. environment ∠→ Caso, to The coal can be purified by solid-waste disposal site floatation(浮选 Effluents from -t coal-fired Sulfur dioxide produced power plant containing So2 2 from the burning of coal can be removed by scrubber(i Fig 19.7 a scrubber is used to remove most of the sulfur dioxide 体洗涤器) created when coal is burnedCoal is the filthiest fossil fuel Coal contains sulfur, toxic heavy metals, and radioactive isotopes. Extracting coal from the ground is harmful to human health and to the environment. The coal can be purified by floatation (浮选). Sulfur dioxide produced from the burning of coal can be removed by scrubber (气 体洗涤器). Fig 19.7 a scrubber is used to remove most of the sulfur dioxide created when coal is burned Scrubbed gas to atmosphere Spray tower CaCO3 CaSO4 to solid-waste disposal site Effluents from coal-fired power plant containing SO2