... Z1, KCl Z1, CaCl2 Z2, KCl Z2, CaCl2 25 0 U, ppb 20 0 150 100 50 35 B TCLP-Extractable U 30 Z1, KCl Z1, CaCl2 Z2, KCl Z2, CaCl2 25 U, mg/kg 20 15 10 0 HA (% by wt.) FIGURE 2. 8 Effect of apatite amendment ... zeolites, 4A, © 20 01 by CRC Press LLC 4131/frame/C 02 Page 27 Friday, July 21 , 20 00 4:59 PM Remediation of Metal- and Radionuclides-Contaminated Soils 27 FIGURE 2. 4 Yield of 6-week-old maize in ... Cd(OH )2 precipitate at pH 11 In contrast, 50% of © 20 01 by CRC Press LLC 4131/frame/C 02 Page 24 Friday, July 21 , 20 00 4:59 PM 24 Environmental Restoration of Metals–Contaminated Soils FIGURE 2. 1...