The sample analysis result indicated that in the first 1/3 part of the system, it is more efficient in removal of pollutant.

对床体沿程取样分析结果表明，在床体前1 3段对污染物的去除效果明显。

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Photocatalytic process is one of the current technologies with high efficiency and saving energy for the removal of pollutant from water.

光催化技术是一种新兴的高效节能现代污水处理技术。

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The above in compressed air pollutants must be removed before use, and different kinds of pollutant removal of the method is different.

上述污染物在压缩空气使用前都必须除去，而不同的污染物其去除的方法是不同的。

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"The pollution indoors is generally higher than outdoors, possibly because of an imbalance between the flow of pollutant from outside and its removal from inside to outside, " the researchers say.

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