Citalopram removal from water

The removal of Citalopram from water can be a challenging task as conventional treatment methods may not always be effective. Although, there are methods that have been proven to remove Citalopram from water such as our Nyex Rosalox system which combines adsorption and oxidation in a single step process.

Our Nyex technology successfully removed up to 96% of citalopram from municipal wastewater – from 0.28 µg/L to 0.01 µg/L.

Rosalox logo Nyex Rosalox

How to Remove Citalopram from Water:

When it comes to effective methods to remove pharmaceuticals from water, the Nyex Rosalox™ system developed by Arvia Technologies offers a unique and innovative solution.

The system employs advanced adsorption technology, combining Nyex, its unique adsorbent media and a low-energy, chemical-free electrochemical oxidation process.

This combination allows for the removal of citalopram and other organic contaminants down to trace levels, ensuring cleaner water output. In tests, the Nyex Rosalox™ system has shown excellent results in removing citalopram from wastewater. It offers a sustainable solution for large-scale water treatment facilities.

Rhys Davies

Wastewater Treatment Consultant

Book a meeting at your convenience to talk to one of our specialists about your wastewater issues. Or send us an enquiry.

Citalopram removal methods

Various additional methods have been used to remove citalopram from water, each with its own advantages and disadvantages.

In selecting a removal method, factors such as effectiveness, cost, scalability, and site-specific requirements need to be considered. Additionally, it is important to assess the potential generation of hazardous byproducts and the overall environmental impact of the chosen method.


Granular Activated Carbon (GAC.) Activated carbon filtration for citalopram removal, effectively adsorbs molecules onto its surface, preventing their presence in treated water. The advantage of GAC is its high adsorption capacity and versatility in removing various organic contaminants. However, GAC may require regular replacement or regeneration, leading to operational costs and potential waste disposal concerns.


Adsorption using Alternative Adsorbents. Apart from GAC, alternative adsorbents such as activated carbon fibres, zeolites, and biochar have shown some promise in adsorbing citalopram molecules. These adsorbents offer a range of surface properties and adsorption capacities. However, their effectiveness may vary depending on factors like contact time, pH, and co-existing substances in water.


Chemical Degradation. These methods involve advanced oxidation processes for eliminating citalopram, breaking them down into less harmful compounds. These methods can be effective. However, they often require additional hazardous chemicals and energy input. This leads to increased operational costs and the potential formation of harmful byproducts.


Biological Treatment. Biological treatment utilizes micro-organisms to metabolize and degrade citalopram. This method can be cost-effective and environmentally friendly. However, it may require longer treatment times and careful optimization to ensure efficient removal.


Advanced Technologies. Innovative technologies like the Nyex Rosalox™ system developed by Arvia Technologies combine adsorption media and electrochemical oxidation of citalopram to effectively remove it. These technologies offer high removal efficiencies and no additional reliance on ‘tip-in’ chemicals.

Does GAC Remove Citalopram?

Granular activated carbon (GAC) has demonstrated its effectiveness in removing citalopram from water. It efficiently adsorbs citalopram molecules onto its surface, preventing them from being present in the treated water.

However, there are some considerations to keep in mind. GAC may also remove other organic compounds present in water, leading to potential competition for adsorption sites.

Additionally, the capacity of GAC to remove citalopram will diminish over time, requiring regular replacement or regeneration. Potentially this could mean processes being taken off-line to accomplish this.

For our take on why we feel GAC is an environmentally unfriendly method of water treatment, see this article.

Adsorption of Citalopram in Water:

Adsorption is a widely employed method for citalopram removal from water. Apart from GAC, alternative adsorbents such as activated carbon fibres, zeolites, and biochar show promise in effectively adsorbing citalopram.

The adsorption process is similar to GAC techniques. It involves attaching citalopram to the surface of the adsorbent material. This reduces its concentration in water.

The effectiveness of adsorption for removal of citalopram from drinking water can be affected by various factors. These include contact time, pH, and the presence of other substances in the water.

Learn how Arvia products can help

Nyex Rosalox

Nyex Ellenox

Citalopram is an antidepressant which forms part of a group of substances known as selective serotonin reuptake inhibitors (SSRIs). Citalopram is used to treat major depressive disorders and panic attacks. Citalopram removal from water: We removed 96% of citalopram from municipal wastewater – from 0.28 µg/L to 0.01 µg/L.