Migration Patterns of Pollutants in Construction & Demolition Waste
Abstract
Simulated landfill columns with heavy metal contaminated construction and demolition under different acid rain conditions have been established. Hydration products in cement such as silicate, aluminate, calcium hydroxide, etc. may release into the leachate with rainfall, which ultimately leads to the increase of pH to 11–12. Leaching of inorganic matter during landfilling causes a higher total dissolved solid and electrical conductivity compared with those of municipal and industrial wastewater. On the other hand, the concentration pattern and cumulative release of Cu, Cr, and Cd is arranged in the order of neutral rain (pH = 4.8) < weak acid rain (pH = 5.8) ...
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