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|Title:||Alkali Degradation of PCB Congeners in Sewage Sludge.|
|Authors:||RAHMAN Mohammad saifur; PAYA-PEREZ Ana beatriz; LARSEN Bo richter|
|Citation:||Fresenius Environmental Bulletin vol. 6 p. 648-654|
|Type:||Articles in periodicals and books|
|Abstract:||Alkaline saponification of sewage sludge may lead to the degradation of PCB's with five or more chloro-substituents, HCB and DDE. Refluxing sewage sludge with 2N KOH in methanol of 6 hours did not cause degradation at 50+?C, reduced the concentration of hepta- to deca-CBs with approx. 50% at 70?C, and even more at 90?C. Refluxing with 4N KOH in methanol for 6 h efficiently eliminated hepta- to deca-CBs, reduced hexa-CBs with around 50% and penta-CB-s with around 30% HCB was degrades faster than PCBs, whereas DDE was similar to penta-CBs.|
|JRC Institute:||Joint Research Centre Historical Collection|
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