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Decomposition of phenolic endocrine disrupting chemicals by potassium permanganate and $$gamma$$-ray irradiation

Abe, Yasuhiro*; Takigami, Machiko; Sugino, Koji*; Taguchi, Mitsumasa; Kojima, Takuji; Umemura, Tomonari*; Tsunoda, Kinichi*

The decomposition of phenolic endocrine disrupting chemicals (P-EDCs), such as phenol, 4-butylphenol (BuP), and bisphenol A (BPA), in aqueous solutions by potassium permanganate (KMnO$$_{4}$$) was studied and its efficiency was compared with that of hydroxyl radicals (OH$$^{.}$$) generated by $$^{60}$$Co $$gamma$$-ray irradiation. Various organic acids and inorganic carbon were formed in the decomposition of P-EDCs due to either KMnO$$_{4}$$ or OH$$^{.}$$. They were formed via direct aromatic ring cleavage in the case of KMnO$$_{4}$$ and OH$$^{.}$$ addition-substitution reactions followed by aromatic ring cleavage in the case of OH$$^{.}$$. Comparing the decrease in the P-EDCs based on the number of electrons, the amount of KMnO$$_{4}$$ spent to completely eliminate BuP and BPA was comparable to the amount of OH$$^{.}$$. Although three times more KMnO$$_{4}$$ was needed for phenol than OH$$^{.}$$, the complete conversion of phenol into organic acids and inorganic carbon was achieved with 720$$mu$$M of electrons in both cases.

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Category:Chemistry, Multidisciplinary

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