Dehalogenation of Polychlorinated Biphenyls (PCBs) using chemical dechlorination

The objective of this study is concerned about the effects of ultrasound, KPEG/oil weight ratio and polyethylene glycol (PEG) molecular weight in the treatment of PCBs present in transformer oil using chemical dechlorination (KOH/PEG). The dechlorination performance was assessed in terms of the destruction and removal efficiency (DRE) of PCBs. DRE value was expressed as percentage. An Agilent 7890A Gas Chromatograph (GC) fitted with a flame ionization detector (FID) and a capillary column (HP-5) was used for the determination of PCBs. The best results (average DRE of 88.55 %) were obtained under the following conditions KPEG/oil ratio of 30 and PEG 600. PCBs dehalogenation in Sovtol-10 involves all congeners with high efficiency. In particular, congeners of high molecular mass disappear from the chromatogram in all runs. The removal of PCBs is strongly affected by KPEG/oil ratio, PEG and KPEG/oil ratio-PEG interaction, in this order

Obtaining insight in atmospheric trace organic compound concentrations and trends in Dronning Maud Land, East Antarctica by means of long term passive and active air sampling.

info:eu-repo/semantics/publishe