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Hazardous waste treatment technologies are designed to reduce the toxicity, volume, mobility, or environmental impact of hazardous wastes before their final disposal or recovery. Hazardous wastes may contain toxic chemicals, corrosive substances, flammable materials, reactive compounds, heavy metals, pesticides, solvents, and other harmful constituents. Proper treatment is therefore essential for protecting human health, soil, water, and air. The selection of treatment technology depends on the physical and chemical characteristics of the waste, its concentration, quantity, and the required disposal method. Physical treatment technologies alter the physical properties of waste without necessarily changing its chemical composition. Common methods include filtration, sedimentation, screening, centrifugation, evaporation, and adsorption. Filtration separates suspended solids from liquid _________ ____ ________ _______ ______.
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