What Does Reverse Osmosis Remove From Water

What Does Reverse Osmosis Remove From Water

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Reverse osmosis is a popular water filtration method that is used by many households. The process removes impurities from water by using pressure to force water molecules through a semi-permeable membrane. This leaves the impurities behind, resulting in clean, filtered water.

However, what impurities/contaminants does it actually remove? Well, that’s exactly what we’ll be discussing in this article.

Before we dive into that, let’s briefly touch on what exactly RO is, and how it works.

How Does Reverse Osmosis Work

Reverse osmosis is a process that uses a semi-permeable membrane to remove ions, molecules, and larger particles from water. The membrane only allows water molecules to pass through, so the other particles are left behind. This process can be used to purify water or concentrate saltwater.

What Does Reverse Osmosis Remove From Water

Reverse osmosis can remove a variety of impurities from water, including salts, viruses, bacteria, and chemicals. This makes it an effective way to purify both drinking water and water used in industrial processes.

List of contaminants that RO can remove

Reverse osmosis can remove many types of contaminants from water, including lead, fluoride, arsenic, chromium, and mercury. RO systems are also effective at removing bacteria and viruses.

One downside of reverse osmosis is that it can remove some beneficial minerals from water, like calcium and magnesium. This means that reverse osmosis filtered water may need to have these minerals added back in before it is safe to drink (in the long term).
However, as with any form of water filtration, it is not guaranteed that all contaminants will be completely removed by reverse osmosis (RO).
Technically, anything larger than 100 Molecular Weight units will be rejected by a RO membrane. In general, 95%–99% of inorganic material is removed by RO membranes. Things like calcium, strontium, copper, and substances like sodium chloride are included in this. At maximum effectiveness, organic materials like bacteria and viruses are eliminated by 99.9%. Sometimes the water generated may be completely virus and bacterial-free.
Dirt, hardness, algae, and mould can all be removed by RO, but these materials should first be filtered to avoid premature membrane deterioration.

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