Carbon black, with the exception of chemically treated and water dispersible carbon black grades, is appropriately andmost often disposed ofin landfills. Itis nontoxicand will not leach or release any constituents to the groundwater from a landfill. Carbon black, like activated carbon, has a very high surface area and a strong adsorptive capacity. Organic materials that come in contact with carbon black can be adsorbed and are not easily liberated thereafter. Carbon black is not biodegradable. Water discharges containing carbon black must comply with applicable requirements for
solids and oxygen demand. Carbon black is not soluble in water and has a specific gravity of 1.7 to 1.9 (water = 1). Gravity settling is effective and the most common.
Spills should be cleaned immediately to prevent the spread of carbon black. If it is necessary to clean up a remote or small spill by dry sweeping, great care should be taken not to disperse the carbon black into the air.