Journal of Industrial and Engineering Chemistry, Vol.31, 55-60, November, 2015
Partial oxidation of polyvinyl alcohol using a commercially available DSA anode
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The removal of polyvinyl alcohol (PVA) by electrochemical oxidation was investigated systematically under various conditions using a commercial Dimensionally Stable Anodes anode. It was observed that higher electrode potential led to more PVA degradation and gases evolution. Acidic conditions were beneficial for PVA degradation. The higher degradation of PVA was achieved with KBr compared with other salts. The PVA degradation was slightly improved by ultraviolet irradiation while hydrogen peroxide lowered the degradation evidently. FTIR analysis indicated that PVA was partially oxidized rather than completely mineralized. The iso-propanol quenching test indicated hydroxyl radicals were mainly responsible for PVA degradation.
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