Table 3 Comparison of heavy metal contents before and after treatment using various agent solutions.
From: Heavy metal removal using an advanced removal method to obtain recyclable paper incineration ash
Heavy metal | Unit | Original sample | Agent solutions | ||||
|---|---|---|---|---|---|---|---|
Distilled water | EDTA | CA | OA | HCl | |||
Pb | mg/kg | 944.70 ± 40.62 | 900.00 ± 45.00 | 750.02 ± 28.50 | 890.01 ± 35.69 | 820.01 ± 38.54 | 860.02 ± 33.20 |
Cu | 902.40 ± 37.90 | 900.30 ± 38.71 | 790.10 ± 27.65 | 830.23 ± 35.12 | 706.09 ± 31.77 | 860.12 ± 26.84 | |
As | 6.72 ± 0.26 | 6.72 ± 0.25 | 6.32 ± 0.20 | 6.72 ± 0.24 | 5.40 ± 0.29 | 6.70 ± 0.18 | |
Hg | 0.10 ± 0.01 | 0.09 ± 0.01 | 0.09 ± 0.01 | 0.08 ± 0.01 | 0.09 ± 0.01 | 0.10 ± 0.01 | |
Cd | 17.48 ± 0.68 | 17.20 ± 0.89 | 16.10 ± 0.66 | 16.40 ± 0.56 | 15.90 ± 0.73 | 16.30 ± 0.54 | |
Cr6+ | NDa | ND | ND | ND | ND | ND | |
