PFOS is a chemical that makes its way to water sources from chemical plants. Exposure to these chemicals can lead to developmental risks for fetuses, immune effects, cancer, thyroid effects, and various other harmful health effects. Therefore, it is essential that PFOS be removed using various treatment methods.
When it becomes clear that chemicals are in the drinking water, a sampling needs to be performed to determine the scope and source of the contamination. Fortunately, a study has been conducted into the treatment methods of PFOS and has now been released. Most methods used to treat PFOS have been ineffective. Anion exchange is highly effective at treating PFOS. Nanofiltration, reverse osmosis, and granular activated carbon are also effective.
Those who live in areas where PFOS is a risk are advised to use activated carbon filters, since they can remove PFOS at the point of use. However, the effectiveness of the activated carbon filters can vary based on how many other contaminants are in the water. The exhausted carbon must be disposed of. These systems can also be used to treat groundwater so it is safe to drink before it even reaches the tap.
Reverse osmosis is another treatment method that is more effective with lower PFOS concentrations. Reverse osmosis is another filter that can be used at the point of use. These solutions allow homeowners to take control over the safety of their tap water. The pores used for reverse osmosis are highly restrictive and will remove many other contaminants, such as bacteria. However, there are some chemicals that are smaller and can pass through, such as pesticides. Therefore, this method usually needs to be used in combination with other treatment methods to fully purify water. Also, reverse osmosis wastes more water than other treatment methods do.
Nanofiltration comes with the same limitations as other physical filtration methods. It consists of pores, and the pores can be blocked by organic matter. Pretreatment might be necessary before the water can be passed through the nanofiltration membrane as a final method of treatment. However, this filter method will also make the water safer to drink.
For anion exchange, the absorption rates are based on porosity. Reject brine has to be regularly disposed of. The rate of exchange is based on the amount of PFOS that is present. By using one or more of these filtration methods, the water will be safer to drink.
For more information, talk to companies like PFOS-PFOA Treatment LLC.