Degradation of polychlorinated biphenyls (PCBs) by Staphylococcus xylosus in liquid media and meat mixture

Degradation of PCBs in dry fermented sausages during drying/ripening

“…However, the total PCBs degradation was lower here when compared to meat emulsions of the frankfurter type (Lušnic et al, 2012). In contrast, the study of Leães et al (2006) showed more than 60% total PCBs degradation in different liquid media.…”

“…This is also in agreement with the hypothesis that PCBs that contain chlorine atoms in the para and meta positions can be preferentially biodegraded (Wiegel and Wu, 2000). In contrast, Leães et al (2006) indicated that only PCB 10 was significantly degraded in their meat mixture, while the higher chlorinated PCBs were only slightly, and non-significantly, degraded. At the same time, PCB 28, PCB 52 and especially PCB 10 showed transitory increased levels during the drying/ ripening process in the present study.…”

“…In one such study, Leães et al (2006) Bayarri et al (1998) who observed that the process of curing of pesticide-spiked sausages did not have any significant effects on the changes in hexachlorobenzene and hexachlorocyclohexane levels, with only M. varians promoting degradation of some of the compounds tested. In the present study, four commercial starter cultures of different manufacturers were used, which contained S. xylosus, S. carnosus and L. sakei.…”

The Effect of Solvent, Hydrogen Peroxide and Dioxide Titanium on Degradation of PCBs, Using Microwave Radiation in Order to Reduce Occupational Exposure

“…For several decades, PCBs have been used in a wide range of industrial applications because of their excellent physical and chemical properties, such as: oil in transformers, dielectrics in capacitors, hydraulic fl uids in hydraulic tools and equipment and heat exchange liquids [3,4]. PCBs also found widespread use as lubricants for turbines and pumps, in the formulation of cutting oils for metal treatment, and to a lesser extent, in applications such as adhesives, carbonless copy paper, dyes, pesticides, surface coatings, plasticizers and waxes [2][3][4][5][6][7][8][9][10][11][12][13]. Polychlorinated biphenyls are toxic, persistent, bio-accumulative and pose a risk of causing adverse effects to human health and the environment.…”

“…Polychlorinated biphenyls are toxic, persistent, bio-accumulative and pose a risk of causing adverse effects to human health and the environment. For various social, technical and economic reasons, signifi cant quantities of PCBs contaminated transformer oil are still in use or in storage [4,7,8,13,14]. Most of the dechlorinating processes for wastes containing PCBs were carried out in various organic solvents [2-4, 6-9, 15].…”