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Fig. 5
NDL-PCB concentration (ng/g) in sediments
| Treatment | RP (5 MeV/100 kGy)* | HT (500°C/30 min) | HT + RP** |
|---|---|---|---|
| Without RP or HT | 52 200 | 52 200 | 52 200 |
| With RP and/or HT | 12 348 | 3 280 | 2 900 |
| PCB concentration reduction factor | 4.2 | 16.0 | 18.0 |
Concentrations of NDL-PCB and DL-PCB (ng/g) in dried sediments and in liquid condensate after HT
| Substance | Dried sediments | Liquid condensate |
|---|---|---|
| NDL-PCB | 3280 | 78.9 |
| DL-PCB | 463 | 69.4 |
| Weight% | 39.5 | 56 |
Reduction of DL-PCB concentration (ng/g) in sediments by RP method depending on their chemical pre-treatment
| Treatment | RP (5 MeV/300 kGy)* | RP (5 MeV/100 kGy)** |
|---|---|---|
| Without RP | 4 630 | 6 400 |
| With RP | 4 050 | 1 560 |
| Concentration reduction factor | 1.14 | 4.1 |