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Combination of methods of thermal and radiation treatment of sediments associated with PCBs – the Delor type Cover

Combination of methods of thermal and radiation treatment of sediments associated with PCBs – the Delor type

Nukleonika
Volume 66 (2021): Issue 4 (December 2021)
By: ,  ,  ,   and    
Open Access
|Nov 2021
Figures & tables

Figures & Tables

Fig. 1

Positions of current main sources of environmental load of PCBs in Eastern Slovakia.

Fig. 2

Chemical structures of selected PCB congeners.

Fig. 3

Block diagram of the design of optimization of interconnection of HT methods with radiation treatment method in their complementary interaction.

Fig. 4

Concentrations of NDL-PCBs in samples of sediments treated with RP.

Fig. 5

Comparison of NDL-PCB concentrations in untreated sediment samples with RP-treated samples following HT.

Table 1

NDL-PCB concentration (ng/g) in sediments

TreatmentRP (5 MeV/100 kGy)*HT (500°C/30 min)HT + RP**
Without RP or HT52 20052 20052 200
With RP and/or HT12 3483 2802 900
PCB concentration reduction factor4.216.018.0

* Chemical pre-treatment of sediment samples: 7 g dry sediment + 13 g water + 10 g K2CO3.

** Chemical pre-treatment of sediment samples: 7 g dry sediment + 13 g water + 2 g K2CO3.

Table 2

Reduction of DL-PCB concentration (ng/g) in sediments by RP method depending on their chemical pre-treatment

TreatmentRP (5 MeV/300 kGy)*RP (5 MeV/100 kGy)**
Without RP4 6306 400
With RP4 0501 560
Concentration reduction factor1.144.1

* Chemical pre-treatment: 7 g dry sediment + 13 g water + 2 g K2CO3.

** Chemical pre-treatment: 7 g dry sediment + 13 g water + 10 g K2CO3.

Table 3

Concentrations of NDL-PCB and DL-PCB (ng/g) in dried sediments and in liquid condensate after HT

SubstanceDried sedimentsLiquid condensate
NDL-PCB328078.9
DL-PCB46369.4
Weight%39.556
DOI: https://doi.org/10.2478/nuka-2021-0030 | Journal eISSN: 1508-5791 (formerly 0029-5922) | Journal ISSN: 0029-5922
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Language: English
Page range: 207 - 211
Submitted on: Jan 3, 2021
Accepted on: Apr 8, 2021
Published on: Nov 25, 2021
Published by: Institute of Nuclear Chemistry and Technology
In partnership with: Paradigm Publishing Services
Keywords:
Electron beam,
Heat treatment,
Polychlorinated biphenyls,
Radiation degradation
Related subjects:
Chemistry,
Nuclear chemistry

© 2021 Marko Fülöp, Andrea Šagátová, Ivan Benkovský, Karel Prokes, Lubica Foltinova, published by Institute of Nuclear Chemistry and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 66 (2021): Issue 4 (December 2021)
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