水合锰氧化物对水中溴酚的去除及脱溴效能

Removal of Bromophenols and Debromination by Hydrated Manganese Oxide

采用化学反应合成的水合锰氧化物模拟高锰酸钾氧化原位产生的锰氧化物,考察了平均粒径对水合锰氧化物活性的影响、水合锰氧化物对溴酚的去除效能以及脱溴能力。结果表明,水合锰氧化物的尺寸越小,对有机物的氧化活性越高;水合锰氧化物对溴酚有良好的去除能力,且伴随着溴离子的释放。脱溴指数随着p H值的升高而降低,表明高p H值更有利于溴离子的脱除;对于不同位置的溴取代基,脱溴由易到难排序为4-Br P>2-Br P>3-Br P。

Hydrated manganese oxide was prepared from chemical reaction to simulate manganese oxide generated from permanganate. The influence of average size on the activity of hydrated manganese oxide, its removal of bromophenols, and the debromination were investigated. The results showed that the smaller the average size was, the higher the activity toward organic pollutants became. Hydrated manga- nese oxide showed excellent performance on the removal of bromophenols and released bromide at the same time. The debromination index decreased with the increase of pH, which indicated that high pH was beneficial to the debromination. Regarding the position of the bromine atom, the order of debromina- tion was 4-BrP 〉 2-BrP 〉 3-BrP.