Chemical dechlorination for the treatment of PCBs present in transformer oil (Sovtol-10): parameter study
Vol. 70 No. 563 (2013), Articles
Vol. 70 No. 563 (2013)

Chemical dechlorination for the treatment of PCBs present in transformer oil (Sovtol-10): parameter study

Articles
Margie Zorrilla Velazco
Study Center of Applied Chemistry Central University “Marta Abreu” of Las Villas Road to Camajuani Km. 5 ½ CP 54830, Villa Clara
Petra G. Velazco Pedroso
Study Center of Applied Chemistry Central University “Marta Abreu” of Las Villas Road to Camajuani Km. 5 ½ CP 54830, Villa Clara
Gretel Villanueva Ramos
Faculty of Chemistry and Pharmacy Central University “Marta Abreu” of Las Villas Road to Camajuani Km. 5 ½ CP 54830, Villa Clara
Herman Van Langenhove
Research Group EnVOC Faculty of Bioscience Engineering Ghent University Coupure Links 653 B9000
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Zorrilla Velazco, Margie et al. “Chemical dechlorination for the treatment of PCBs present in transformer oil (Sovtol-10): parameter study”. Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry, vol.VOL 70, no. 563, https://raco.cat/index.php/afinidad/article/view/276265.


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Abstract

Different parameters for the treatment of PCBs present in
transformer oil (Sovtol-10) using chemical dechlorination with polyethylene alkoxide (KPEG) were evaluated. The effect of the KPEG/oil weight ratio, KOH/PEG mole ratio and polyethylene glycol molecular weight (PEG) using KOH in pellets were determined first. With the optimal values obtained the influence of two other parameters: KOH in powder and ultrasound was investigated. The overall dechlorination performance was assessed in terms of the destruction and removal efficiency (DRE) of PCBs. Average DRE of 93.7 % was obtained under the following conditions: PEG 400, KPEG/oil weight ratio of 30 and KOH/PEG mole ratio 2 for 2 hours of reaction. The ultrasound initially increases DRE of PCBs by 8 % after 10 min of reaction
time. After a reaction time of 120 min no difference in DRE
was measured when using ultrasound.

Keywords

Polychlorinated biphenyls, dechlorination, KPEG process, sovtol, ultrasound.
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