塩素処理による水中有機物の化学変化(第2報)フェノールおよびクロロフェノールに対する遊離型残留塩素の作用

概要

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A fundamental studies were made on chemical changes of phenol during chlorination of water by means of electron capture detector-gas liquid chromatography and the following results wereobtained. In the water chlorinated at pH 7.0,phenol was easily chlorinated by a substitution mechanism to give chlorophenols. The number of substituted hydrogen atoms increased with increasing concentration of HClO, and the concentration of 2,4,6-trichlorophenol (I) formed in water reached a maximum level within 30 min. Then the chlorine in para-position of I was hydrolyzed off and subsequently oxidized with HClO, if present at a high concentration, to form 2,6-dichloro-1,4-benzoquinone, which was not stable in the chlorinated water at pH 7.0. In an alkaline solution at pH 9.0,phenol was chlorinated with ClO^- to form chlorophenols which were somewhat stable in this water. Chlorination of phenol was hardly influenced by the presence of alkaline metal ions, alkaline earth metal ions, Zn^<2+>, Al^<3+>, Fe^<3+>, Cl^-, CO^<2->_3,NO^-_3,PO^<2->_4,and SO^<2->_4 in less than 5 ppm, but suppressed by Fe^<2+>, Sn^<2+>, NO^-_2,and S_2O^<2->_3.
公益社団法人日本薬学会の論文
1977-12-31