PFAS – Drinking Water Treatment
The PFAS series of harmful chemicals is present in many different places in the environment, one of the most serious of these is in our drinking water. As we consume large amounts of treated water, if there is a presence of PFAS then these can pass into our bodies where they have harmful effects, working with municipal drinking water operators we are able to offer a treament option.
A Multi-Tier Approach to PFAS Removal
It is critically important to take a holistic view of the water quality, the treatment line and target and the local conditions, so as to define the right strategy. Granular activated carbon (GAC) and ion exchange resins (IEX) are the two most common technologies to remove PFAS. They can be combined or used singularly, in different configuration options (single vessel, secondary polishing, lead/lag). GAC is already widely installed in water or effluent treatment lines as it can remove a large variety of contaminants that may be present in water sources (organics, disinfection by-products precursors, pesticides, etc.). PFAS removal can be one of its additional missions. Although the adsorption of PFAS mainly occurs in micropores, Jacobi offers a wide range of activated carbons, with different porosities, from micro to macro, to address the PFAS challenge in each water condition. For example, PFAS-contaminated surface waters tend to have more bulk organic material than groundwater that makes them more challenging to treat, even without PFAS being involved. Using a GAC with narrow pores would result in pore blockage that may reduce the carbon’s ability to adsorb micropollutants such as PFAS. In this situation, Jacobi offers standardised grades from its AquaSorbTM range, as well as customer specific blends, such as AquaSorbTM Blend, to adapt to local conditions.PRODUCTS
Activated carbon and ion exchange resins are widely known to be the most effective solution. When the molecular weight of the chemical you are dealing with is lower, ion exchange resins are the best option and if the weight is higher, activated carbon performs best.
At Jacobi, we can offer a comprehensive, end-to-end service using either, or both, of these solutions, alongside the necessary personnel and equipment. This means you won’t need to source different areas of your solution from separate companies. All three businesses in the Jacobi Group come together to provide smooth running and effective PFAS solutions for our customers.
| Activated Carbon | Ion Exchange Resins | |
|---|---|---|
| Conditions | PFAS concentration < 10 µg/L | PFAS concentration > 2 µg/L |
| EBCT | 20 minutes Lead-lag configuration preferred | 3 minutes Smaller footprint |
| Limits | Better for long chain (>C6) - adsorption improves with longer chain | Better when high percentage of shorter chain - capture improves with decreasing chain |
| Capacity | Adsorption capacity available for PFAS and other contaminants (organics, pesticides and metabolites, taste and odours) | Higher throughput for PFAS Longer Life |
| Sustainability | Reactivation possible by Jacobi | One-way use |
| Cost | lower price per kg, lower adsorption capacity | higher cost per kg, higher adsorption capacity |
AC and IEX is the best solution for taking care of PFAS.
Granular Activated Carbons for PFAS Removal
At Jacobi we address each individual PFAS removal case and provide products either from our large portfolio or tailored to the customer’s exact needs.
This portfolio includes:
AquaSorbTM CX and J200
- High activity coconut-based activated carbons
- Highly microporous adsorbent
- Ideal for home water filter equipment in point of use or point of entry systems
- Extensive microporosity leads to superior adsorption and retentivity of PFAS in water matrices containing low organic background (groundwater)
- Sustainable raw material means these products have the lowest Global Warming Potential
AquaSorbTM 6300 and 6300-M
- High activity granulated activated carbon
- Manufactured specifically for water treatment
- Combines raw materials to allow a homogeneous activation of each particle
- Tolerant to pore blockage due to their widespread pore distribution
- AquaSorb™ 6300-M is suitable for use in the treatment of PFAS in surface water treatment highly loaded by organics.
AquaSorbTM Hybrid Products
- Customer specific blends tailored to the customer’s needs and treatment conditions
- High performance activated carbon
Specifically manufactured for water treatment - Unique pore size distribution
- May be produced using a sustainable raw material
Ion Exchange Resins for PFAS Removal
Jacobi Resins provides ion exchange resins to treat PFAS problems, to be used either instead of, or alongside, activated carbons.
- Resinex™ PFCR-1 & PFCR-2 Selective PFOA/PFOS anion exchange resin
- Functional chemical group with very high selectivity for PFAS
- One litre of resin can treat up to 200m³ of water with a contact time of three minutes
- Resinex™ PFCR-2 is NSF/ANSI/CAN 61 approved for use in water treatment plant
- Completely eliminates short-chain PFAS with sulphonic function
Due to its very long service lifetime, the Resinex™ PFCR Series is intended for single use and the resins are incinerated once saturated.
SERVICES
Mobile Filter Units
At Jacobi, we don’t simply provide the required product needed to tackle your PFAS problem. We are in a unique position that allows us to offer a full service including as much or as little of the equipment, technical know-how and personnel needed to ensure an effective solution.
This includes rental of mobile filter units, which we can arrange to be delivered and installed at your site by our team of PFAS removal experts. Filter sizes range from 200litre to 20m³ vessels and are able to treat flows from 100l/h to 80m³/h of water. As filters are modular, they can be arranged in series or parallel.
Our specialised teams can also deal with all the required logistics, including media handling, as well as any tests or evaluations that might be needed. Our goal is to provide you with every aspect of your PFAS solution in the quickest, easiest and simplest way possible.
In practice this means
- Using test data and our extensive experience to help you to select the best products or product combinations.
- Helping you to select the filters and flow conditions that will achieve the best possible technical performance. (PFAS is a micropollutant and so contact times are crucial for optimal removal of low concentration components.)
- Providing process analysis and start up support that ensures the filter sequence provides the most costeffective and technically optimal performance.
- Safe, clean and efficient logistics and media exchange with minimal impact on your personnel’s time.
- Using closed systems approved for transporting the waste in a secure way without risk of spillage.
Our fleet of filters can be connected preloaded with filter media to treat a PFAS contamination problem.
Reactivation of Spent Carbon and Disposal of PFAS, A Forever Solution
The PFAS problem holds a unique challenge. Normally an application is successful when the pollutants are removed and captured in the activated carbon. In the case of PFAS, only half of the problem is solved. Transporting captured PFAS to a disposal site, even in a concentrated form, will simply move the problem. A forever chemical needs a forever solution.
We have been working since 2022 to develop that solution and we are pleased to say that we now have it. Once transported to our European facilities we are able to reactivate spent carbon with PFAS in our high temperature kilns. Thus, breaking down the PFAS molecules into basic fluoride compounds. This process is monitored meticulously to ensure adequate and responsible processing and we have been certified with the relevant governmental body. This is a forward step in the forever solution and it’s the most sustainable way to manage concentrated PFAS waste activated carbon.
Being able to reactivate and reuse carbon is proven to have a far smaller negative impact on the planet than producing more virgin carbon, making it the most sustainable option. Finally, it is also far more cost-effective for the user too.
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