ENVIRONMENTAL LEACHING CHARACTERISTICS AND BIOAVAILABILITIES OF WASTE CATHODE RAY TUBE GLASS

摘要

In China, hazardous e-waste-cathode ray tube (CRT) glass is usually left around, and it is likely to contact with water resources directly. To identify the real leaching characteristics and bioavailabilities of heavy metals Pb and Ba contained in CRT glass in the nature environment, experiments were carried out by simulating the nature environment. The results indicated that Pb and Ba contained in CRT glass were stable in most conditions, which only showed obvious leaching toxicities in strong acidic/alkali conditions. EDTA and DTPA extractable Pb and Ba amounts were extremely high, e.g., EDTA extractable Pb of color funnel glass was up to 1960.07 mug/kg, indicating that the potential bioavailability of waste CRT glass is very high.