Dioxins deodorization

Dioxin content in certain oil and its current and future maximum levels are shown in Table 3. Pilot-scale experiments have shown that dioxin can be sufficiently removed by activated carbon treatment (20). Similarly, PCBs that are present in foods in ppb level can be reduced by activated carbon or deodorization treatment of the oil. 

The vapor pressure of PCB can vary within a wide range. The more volatile PCBs have a vapor pressure around 40-75 mbar, which is similar to the vapor pressure of some organo-chlorine pesticides. Our own lab deodorization trials showed that PCBs and dioxins can be stripped from fish oil without degradation of the 00-3 fatty acids (eicosapentaenoic acid, EPA, and docosahexaenoic acid, DHA) provided that the deodorization pressure is very low (>2 mbar) (Table 10). Other studies showed that deodorization at 230°C and 5 mbar was insufficient to remove a PCB heat-transfer agent from contaminated rice bran oil (28). 

Optimizing deodorization technology and process conditions for the removal of specific contaminants (pesticides, PAH, dioxins, PCB, mycotoxins, ) and maxi-... 

Disposable diapers lined in plastic are made from synthetic fibers that contain deodorizing chemicals, bleaches, and highly toxic dioxins, which are now known to be harmful to a baby s skin and to the environment. It is estimated that a plastic disposable diaper may take up to 500 years to biodegrade. 

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