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Table 7

Distribution of adsorbed metal ions in the WPWS PRB

Zones in barrierCrCuZnNiCdAs
ppm
F5, S5 296 ± 4, 347 ± 15 172 ± 9, 191 ± 13 1,625 ± 26, 1,630 ± 30 132 ± 10, 112 ± 8 16.0 ± 0.9, 12.0 ± 0.2 2.1 ± 0.3, 1.4 ± 0.1 
F4, S4 218 ± 7, 432 ± 18 310 ± 20, 211 ± 14 1,600 ± 29, 1,615 ± 21 137 ± 6, 216 ± 7 19.5 ± 0.8, 15.0 ± 0.6 2.2 ± 0.1, 2.1 ± 0.1 
F3, S3 448 ± 21, 321 ± 16 261 ± 11, 148 ± 8 1,600 ± 25, 1,630 ± 18 235 ± 13, 168 ± 11 17.5 ± 0.9, 10.0 ± 0.7 1.1 ± 0.1, 2.1 ± 0.3 
F2, S2 349 ± 16, 395 ± 21 192 ± 13, 181 ± 13 1,630 ± 17, 1,610 ± 22 132 ± 5, 199 ± 13 12.5 ± 0.3, 13.5 ± 0.4 2.3 ± 0.2, 2.3 ± 0.3 
F1, S1 337 ± 10, 424 ± 15 117 ± 16, 167 ± 10 1,615 ± 14, 1,495 ± 17 186 ± 10, 186 ± 11 14.0 ± 0.6, 13.0 ± 0.5 2.3 ± 0.4, 2.2 ± 0.3 
Average 330 364 210 179 1,614 1,596 164 176 15.9 12.7 2.0 2.0 
             
Zones in barrierCrCuZnNiCdAs
ppm
F5, S5 296 ± 4, 347 ± 15 172 ± 9, 191 ± 13 1,625 ± 26, 1,630 ± 30 132 ± 10, 112 ± 8 16.0 ± 0.9, 12.0 ± 0.2 2.1 ± 0.3, 1.4 ± 0.1 
F4, S4 218 ± 7, 432 ± 18 310 ± 20, 211 ± 14 1,600 ± 29, 1,615 ± 21 137 ± 6, 216 ± 7 19.5 ± 0.8, 15.0 ± 0.6 2.2 ± 0.1, 2.1 ± 0.1 
F3, S3 448 ± 21, 321 ± 16 261 ± 11, 148 ± 8 1,600 ± 25, 1,630 ± 18 235 ± 13, 168 ± 11 17.5 ± 0.9, 10.0 ± 0.7 1.1 ± 0.1, 2.1 ± 0.3 
F2, S2 349 ± 16, 395 ± 21 192 ± 13, 181 ± 13 1,630 ± 17, 1,610 ± 22 132 ± 5, 199 ± 13 12.5 ± 0.3, 13.5 ± 0.4 2.3 ± 0.2, 2.3 ± 0.3 
F1, S1 337 ± 10, 424 ± 15 117 ± 16, 167 ± 10 1,615 ± 14, 1,495 ± 17 186 ± 10, 186 ± 11 14.0 ± 0.6, 13.0 ± 0.5 2.3 ± 0.4, 2.2 ± 0.3 
Average 330 364 210 179 1,614 1,596 164 176 15.9 12.7 2.0 2.0 
             

F, First half of WPWS barrier; S, Second half of WPWS barrier.

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