Hazardous waste can be handled in several ways such as chemical processing, such as reduction, oxidation, ion exchange, precipitation, or neutralization thermal processing, such as burning. Landfarming is an example of a biological treatment. Solidification, flotation, sedimentation, evaporation, or filtration are examples of physical treatment. Waste is transformed at the molecular level in the first three categories, and solidified, concentrated, or reduced in volume in the fourth category.
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