Among the existed methods of removingmetal irons from wastewater, using natural polymers and inorganic mineral materials is one comparative cheap, non-poison and easy operated way.
在现有的金属离子去除方法中，天然高分子有机絮凝剂和无机矿物吸附是比较廉价、无毒、简便的处理方法。
2
By removing these soils from the metal surface and providing an oxidizing atmosphere, the passive film is allowed to form and the passivation is accomplished.
将金属表面的这些污物去除并提供氧化的环境后，就形成了钝化膜并实现了钝化作用。
3
The modified bentonite has better qualities and ability of decolorization, sweeten and removing heavy metal cations and aromatic compounds and hard biodegradable harmful organic compounds.