Each of the membrane technologies is essentially a filtration process in which contaminant ions are filtered from solution using a membrane with very small water passages.

这些膜技术本质上都是一个过滤程序，就是用一个有非常细小水通道的膜片把污染物离子从溶液里过滤掉。

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As a new water treatment method, ultrasound technology is mainly based on high temperature pyrogenation and free radical oxidation contaminant during ultrasound process.

超声技术作为一种新型水处理方法，主要是利用超声过程中的高温热解和自由基氧化污染物。

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High purity water systems are primarily composed of austenitic stainless steel (ss) materials due to their corrosion resistant and contaminant free properties.

考虑到铬镍不锈钢(SS)的抗腐蚀和防污染性，高纯水系统基本上都是由铬镍不锈钢材料构成。

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Chloride, considered a secondary contaminant, could affect drinking water's taste, smell and color.

CNN: Salt creeping up the Mississippi River

Milk samples from Phoenix and Los Angeles contained iodine-131 at levels roughly equal to the maximum contaminant level permitted by EPA in drinking water, the data shows.

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