This paper presents the results of the decolorization of azo dye K2G by the electrochemical process catalyzed by manganesemineral.
研究了锰砂催化电化学方法对偶氮染料K2G的脱色效果 。
2
Mineral springs in Slovakia each have a particular taste. Some are more sulphuric, others are rich in manganese or iron.
斯洛伐克的每一眼矿泉都有独特的滋味，有的含硫磺多一些，其他的则富含锰或者铁。
3
There are gold, silver, iron, manganese, molybdenum, uranium, mica, vermiculite, quartz rock, feldspar, granite, marble, barite and mineral water, and so on.