Table 5 Comparison of the heavy metal contents of paper incineration ash following treatment using various removal methods.
From: Heavy metal removal using an advanced removal method to obtain recyclable paper incineration ash
Heavy metal | Unit | Original sample | Removal methods | ||||
|---|---|---|---|---|---|---|---|
Existing methods | Advanced methods | ||||||
EDTA | OA | MS modea | S1 modeb | S2 modec | |||
Pb | mg/kg | 944.70 ± 40.62 | 750.02 ± 28.50 | 820.01 ± 38.54 | 480.03 ± 22.61 | 534.60 ± 28.76 | 516.96 ± 14.27 |
Cu | 902.40 ± 37.90 | 790.10 ± 27.65 | 706.09 ± 31.77 | 620.01 ± 9.92 | 670.00 ± 18.83 | 648.40 ± 28.66 | |
As | 6.72 ± 0.26 | 6.32 ± 0.20 | 5.40 ± 0.29 | 4.81 ± 0.15 | 5.38 ± 0.12 | 4.92 ± 0.21 | |
Hg | 0.10 ± 0.01 | 0.09 ± 0.01 | 0.09 ± 0.01 | 0.09 ± 0.01 | 0.09 ± 0.01 | 0.08 ± 0.01 | |
Cd | 17.48 ± 0.68 | 16.10 ± 0.66 | 15.90 ± 0.73 | 15.40 ± 0.47 | 15.62 ± 0.33 | 15.50 ± 0.67 | |
Cr6+ | NDd | ND | ND | ND | ND | ND | |
