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Pollution Control and Resource Recovery by Zhao Youcai

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Chapter Five

Characterization of Heavy Metals and Dioxins in Fly Ash

Abstract

Fly ash is a hazardous material and of great concern due to the leaching behavior. Compositions of heavy metals, formation and control technology of dioxins, leaching toxicity, speciation distribution of heavy metals and mineral components, XRD analysis of mineral components, in fly ash, are fully provided. Effects of pH on leaching behavior of heavy metals and effects of temperature on volatilization ratios of heavy metals are presented. Results show that the contents of heavy metals in fly ash followed a sequence of Zn > Pb > Cu > Cr > As > Ni > Cd ≈ Hg. Most heavy metals in leaching solution, in accordance with horizontal vibration extraction procedure standard, exceed ...

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