Abstract

A method of detoxifying harmful substances released from wastes and waste incineration ash or from molten slag, etc., in which the diffusion of the harmful substances can be properly prevented at low cost without imposing any burden on the environment.  Also provided are a waste disposal site and a paved road. A water-permeable clay mineral is disposed so as to be close to and/or in contact with harmful substances, such as heavy metals and organic pollutants, released from wastes and waste incineration ash or from molten slag, etc. so that the harmful substances come into contact with the water-permeable clay mineral and are thereby adsorbed onto the water-permeable clay mineral.  Thus, the harmful substances are adsorbed and fixed.  By mixing and/or kneading a water-permeable clay mineral with wastes or waste incineration ash, harmful substances are more effectively adsorbed and fixed onto the water-permeable clay mineral.

IPC Classes  ?

• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
• A62D 3/40 - Processes for making harmful chemical substances harmless, or less harmful, by effecting a chemical change in the substances by heating to effect chemical change, e.g. by pyrolysis
• B01J 20/12 - Naturally occurring clays or bleaching earth
• B09B 1/00 - Dumping solid waste
• E01C 3/00 - Foundations for pavings
• A62D 101/08 - Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
• A62D 101/20 - Organic substances
• A62D 101/43 - Inorganic substances containing heavy metals, in the bonded or free state