此外，当它的使命结束后，高铁酸盐中的铁离子也会以氧化铁的形式沉淀，过滤后就是洁净的水了。
Moreover, once it has done its job, the iron in ferrates precipitates too, as iron oxide, leaving pure water behind.
仙人掌通过让沉淀物和细菌聚集成小的絮状物从而在15分钟内去除了98%的细菌，这些絮状物可以很容易地过滤掉。
The cactus removed 98 per cent of bacteria within 15 minutes by clumping sediment and bacteria into small 'flocs' - clumps of particles floating in water - that could easily be filtered out.
在处理前，让任何悬浮物沉淀到底，或用多层纸巾、干净衣服或咖啡滤器把它们过滤掉。
Before treating, let any suspended particles settle to the bottom, or strain them through layers of paper towel, clean cloth, or coffee filter.
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