... L1401-frame-C10 Page 116 Monday, April 10, 2000 9:59 AM 116 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL Table 10. 1 Structure of Lead and Zinc Extraction in Poland (in thousand ... by CRC Press LLC L1401-frame-C10 Page 118 Monday, April 10, 2000 9:59 AM 118 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL Poland This gasoline contained 0.15 g Pb per liter ... to 81 ,100 tons in 1993 (Table 10. 6) On the other hand, exports increased from 17,600 to 69,500 tons In addition, imports contain lead For example, in 1993, 4,769,333 m3 of leaded gasoline was...