Reviewing the relevance of dioxin and PCB ... - Europe PMC
2018-11-1u2002·u2002The production of chlorine by chloralkali electrolysis using graphite electrodes, which started in the 1890s, has generated large amounts of PCDD/Fs in waste sludge [9, 133, 138, 139]. Since the 1970s' graphite electrodes have largely been superseded by metal electrodes, PCDD/F releases have greatly been reduced .
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