Abstract
Different types of industrial construction and demolition wastes in various places were collected. The mercury content varies much overall, whereas the wastes from the chemical industry contain most due to the mercury-containing raw materials used. Waste from the light industry poses a high risk of Cd. Residential wastes and recycled aggregates exhibit a low ecological risk. The mobility fractions of heavy metals can be very high; most anthropogenic polluted metals bind loosely with minerals in construction waste. The metals easiest to be leached are Zn and Cu, whereas Cd is the hardest. A high Cd content exists in pesticide manufacturing factory, mainly coming from phosphorus rocks. These wastes are also severely contaminated by organophosphorus, intermediates, and pyrethroid pesticide. Pesticides spread all over the plant both in enclosed workshops and in residues, in which bricks and coatings contain the most. Centralized collection for disposal of wastes can only eliminate part of the contaminated waste. Risk assessment indicates that highly noncarcinogenic risks exist, especially in dermal contact and oral ingestion. Industrial construction and demolition waste generated in a fire/explosion accident may be hazardous and cause spread of pollution with explosion shock waves.
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