PFAS contamination has changed the way utilities, remediation firms, and industrial water managers think about treatment. These compounds are persistent, mobile, and difficult to destroy. They often appear at very low concentrations, yet they still create major compliance, liability, and public-health concerns. That is why Chitosan for PFAS Removal is drawing attention as a serious technical topic rather than a niche materials discussion.
The most important point is this: PFAS treatment is not a one-technology problem. In practice, treatment programs often combine characterization, pretreatment, adsorption, membrane systems, residuals management, and long-term monitoring. Activated carbon, ion exchange, and high-pressure membranes remain the most established PFAS treatment technologies in full-scale systems. At the same time, modified chitosan materials—especially quaternized, crosslinked, hydrogel, composite, and nanofiber designs—are emerging as promising adsorbents because they can be engineered for charge density, porosity, regeneration, and selective PFAS binding.
This article is written for environmental engineers, utilities, consultants, groundwater remediation contractors, industrial treatment teams, and procurement managers evaluating chitosan-based PFAS treatment options. It explains where chitosan fits, where conventional technologies still lead, what modified chitosan materials can do, and how to select the right material for bench testing, pilot work, or commercial supply.
For broader context on biopolymer-based treatment, see the pillar guide on chitosan for water treatment.
Quick Answer: Is Chitosan a Real Option for PFAS Removal?
Yes—but with an important qualification.
Native chitosan alone is usually not the whole answer for PFAS remediation. The strongest PFAS results are generally reported with modified chitosan materials, such as:
- quaternary chitosan
- crosslinked chitosan
- chitosan hydrogels
- chitosan-biochar composites
- chitosan nanofiber or membrane formats
- hybrid adsorbents designed for fixed-bed or polishing systems
These materials are attractive because PFAS removal is fundamentally an adsorption problem, and modified chitosan can be engineered to improve:
- positive charge density
- hydrophobic interaction sites
- porosity and surface area
- mechanical stability
- regeneration potential
- compatibility with column, membrane, or hybrid treatment systems
That said, a balanced engineering view matters. Chitosan should not be presented as a universal replacement for GAC, IX, or RO. Instead, it should be seen as a promising advanced adsorbent platform that may be useful in:
- adsorption columns
- polishing stages
- membrane pretreatment
- hybrid GAC/IX systems
- industrial wastewater treatment
- site-specific PFAS remediation projects
What Are PFAS?
PFAS stands for per- and polyfluoroalkyl substances, a large class of synthetic fluorinated compounds used in firefighting foams, industrial processes, coatings, textiles, paper, electronics, plating, and numerous consumer products.
They are often called “forever chemicals” because the carbon-fluorine bond is extremely strong. That bond is one reason PFAS are resistant to environmental breakdown and hard to remove using conventional treatment.
Why PFAS are a global concern
PFAS contamination matters because these compounds can:
- persist for long periods in water and soil
- migrate through groundwater
- accumulate in treatment residuals
- appear in drinking water supplies
- resist standard wastewater treatment
- create long-term regulatory and remediation costs
This is why PFAS water treatment is now a major priority for municipal utilities, industrial facilities, and remediation programs.
Why Are PFAS Called “Forever Chemicals”?
PFAS are called forever chemicals because many of them do not readily degrade in the environment. In treatment terms, that means two things:
- They are difficult to destroy.
- Many treatment systems can only separate or concentrate them rather than eliminate them.
This distinction is critical. Most commercially established PFAS technologies today are sequestration technologies. They remove PFAS from water but create a spent media or concentrate stream that still requires responsible management.
That is why adsorption media selection matters so much.
Main Sources of PFAS Contamination
PFAS contamination does not come from one industry alone.
Common sources
- AFFF and firefighting training sites
- fluorochemical manufacturing
- metal finishing and plating
- semiconductor and electronics operations
- landfills and leachate
- textile and surface-treatment operations
- paper and packaging coatings
- industrial wastewater discharge
- biosolids-related pathways
- contaminated groundwater plumes
Because source chemistry varies, the best treatment design depends heavily on the actual PFAS profile and the surrounding water matrix.
PFAS Classification Table
| PFAS Category | Examples | Typical Treatment Relevance |
|---|---|---|
| Long-chain PFAS | PFOS, PFOA, PFHxS | Often easier to adsorb than short-chain PFAS |
| Short-chain PFAS | PFBS, PFHxA, PFBA | Typically harder to adsorb with conventional GAC |
| Sulfonates | PFOS, PFBS, PFHxS | Often show stronger adsorption than comparable carboxylates |
| Carboxylates | PFOA, PFHxA, PFBA | Important in groundwater and drinking water treatment |
| Emerging replacement PFAS | GenX and related compounds | Require site-specific evaluation |
| Mixed PFAS profiles | Industrial or landfill-impacted waters | Often need hybrid or staged treatment |
Long-chain vs short-chain PFAS
This is one of the most important design questions in PFAS remediation.
| Parameter | Long-Chain PFAS | Short-Chain PFAS |
|---|---|---|
| Adsorption tendency | Generally stronger | Generally weaker |
| GAC performance | Often better | Often poorer breakthrough behavior |
| IX performance | Often strong | Can still be challenging, but often better than GAC |
| Modified chitosan opportunity | Strong | Especially interesting for advanced designs |
| Pilot testing importance | High | Very high |
Short-chain PFAS are one reason new adsorbent materials continue to attract attention.
Why Conventional Wastewater Treatment Struggles to Remove PFAS
Conventional wastewater treatment is not designed around PFAS chemistry. Standard clarification, biological treatment, and many routine chemical processes do not reliably remove dissolved PFAS.
Why?
- PFAS are often present at low but significant concentrations
- many PFAS are highly water-soluble
- they are chemically stable
- biological systems typically do not destroy them effectively
- conventional coagulation alone is usually limited for direct PFAS capture
That is why PFAS treatment usually depends on:
- adsorption media
- ion exchange
- high-pressure membranes
- specialized destruction or concentrate-management steps
- careful pretreatment to protect media and membranes
This is also why the PFAS conversation is different from broader topics such as natural coagulant for wastewater treatment. For PFAS, the core problem is not simple clarification—it is selective separation of persistent dissolved contaminants.
How Chitosan Removes PFAS
The strongest case for chitosan in PFAS treatment is adsorption-driven, not simple coagulation.
1. Electrostatic attraction
Many PFAS of concern are anionic in water. Modified cationic chitosan, especially quaternized chitosan, provides permanently positive sites that can attract PFAS sulfonate and carboxylate groups.
2. Hydrophobic interactions
PFAS molecules contain fluorinated carbon chains. Adsorbents that combine cationic sites with hydrophobic domains may capture PFAS more effectively than materials relying on only one interaction mechanism.
3. Surface adsorption
Crosslinking, templating, and composite design can increase available adsorption sites, improve surface accessibility, and reduce the limitations of raw chitosan powder.
4. Physical entrapment / network trapping
Hydrogel and porous network structures can create transport pathways and internal capture zones, especially when the material is engineered for high porosity and stability.
Why modified chitosan matters
Pure chitosan has real limitations:
- pH sensitivity
- lower mechanical strength
- limited surface area
- lower stability in continuous-flow use
- insufficient selectivity for difficult PFAS streams without modification
That is why PFAS-targeted chitosan technologies usually involve crosslinking, quaternization, composite formation, or nanostructuring.
Modified Chitosan Technologies for PFAS Removal
Quaternary chitosan
Quaternization is one of the most relevant modifications for PFAS adsorption because it creates permanent positive charge across a wide pH range.
Why it matters
- better electrostatic binding to anionic PFAS
- less dependence on acidic protonation
- broader operating pH flexibility
- useful in adsorption columns, hydrogels, and membrane-related systems
For commercial evaluation, quaternary chitosan mushroom is the most direct starting point for PFAS-oriented adsorption design.
Crosslinked chitosan
Crosslinking improves:
- mechanical strength
- resistance to dissolution
- handling durability
- reuse potential
- compatibility with columns, beads, and structured media
Crosslinked formats are often more practical than raw chitosan in continuous treatment systems.
Chitosan hydrogels
Hydrogels are attractive because they can combine:
- high water accessibility
- tunable porosity
- functionalized adsorption sites
- regeneration capability
Recent published work on surface-modified quaternized chitosan hydrogels is especially relevant to both long-chain and short-chain PFAS.
Composite adsorbents
PFAS removal often benefits from hybrid materials. Chitosan can be combined with:
- biochar
- activated carbon
- magnetic particles
- nanomaterials
- mineral supports
- membrane scaffolds
These composites can improve surface area, fouling resistance, recovery, or flow-through performance.
Chitosan nanofibers and membranes
Nanofiber and membrane-type systems may help improve:
- permeability
- selectivity
- surface functionality
- fouling control
- integration with hybrid polishing systems
They are especially relevant where PFAS removal is being combined with broader advanced water treatment.
Long-Chain vs Short-Chain PFAS Removal with Chitosan
A major challenge in PFAS treatment is that adsorbents often behave differently for long-chain and short-chain compounds.
Long-chain PFAS
Long-chain PFAS such as PFOS and PFOA are generally easier to adsorb than shorter-chain analogues. Conventional technologies already perform relatively well on many long-chain compounds.
Short-chain PFAS
Short-chain PFAS are more difficult because they are often:
- more mobile
- more weakly adsorbed by some media
- more likely to break through early
- harder to remove consistently with GAC alone
This is one reason modified chitosan is gaining interest. Well-designed quaternized hydrogel systems have shown promising results for both long-chain and short-chain PFAS in laboratory studies. That does not mean every chitosan system will achieve those results. It means material design is critical.
Practical engineering takeaway
If short-chain PFAS are a major compliance driver, do not assume that any generic chitosan product will work. This is where:
- charge density
- crosslinking strategy
- adsorbent format
- real-water testing
- pretreatment quality
all become essential.
Chitosan for PFAS Removal in Different Water Systems
Drinking water treatment
In drinking water, the treatment priorities are usually:
- low PFAS concentrations
- strict compliance targets
- stable treated-water quality
- safe media handling
- robust long-term service life
For these systems, GAC, ion exchange, and RO remain the most established technologies. Chitosan-based adsorbents are most realistic as:
- advanced polishing media
- niche alternative adsorbents
- hybrid materials under pilot evaluation
- media platforms for future high-selectivity applications
Groundwater remediation
Groundwater remediation often involves:
- long operating durations
- plume variability
- iron, manganese, or solids pretreatment issues
- service-life economics
- remote system management
Chitosan may be relevant in:
- fixed-bed adsorption media
- composite columns
- polishing stages after conventional sorption
- site-specific pilot programs targeting difficult short-chain PFAS
Industrial wastewater treatment
This is one of the most interesting application areas because industrial streams may contain:
- concentrated PFAS
- mixed PFAS species
- co-contaminants
- suspended solids
- oils, surfactants, or salts
In these systems, chitosan can sometimes play multiple roles:
- adsorbent platform for PFAS capture
- pretreatment aid for foulant control
- hybrid media component
- membrane-surface or composite material component
Municipal water treatment
Municipal systems are usually conservative for good reason. They need:
- proven reliability
- predictable media changeout
- validated pilot data
- scalable supply
- regulatory confidence
For municipal applications, chitosan is most compelling when positioned as:
- an advanced adsorbent under evaluation
- a complementary technology
- a tool for hybrid media development
- part of a future-oriented treatment upgrade path
For broader municipal treatment context, see chitosan for municipal wastewater treatment.
Chitosan vs Activated Carbon for PFAS Removal
Activated carbon remains one of the most studied and most widely implemented PFAS technologies, especially in drinking water.
Strengths of activated carbon
- well established at full scale
- familiar to utilities and engineers
- strong performance for many long-chain PFAS
- broad commercial availability
Limitations of activated carbon
- weaker performance for many short-chain PFAS
- breakthrough strongly affected by NOM and co-contaminants
- spent media replacement/disposal burden
- performance depends on EBCT, bed depth, and water chemistry
Where chitosan may compete
Modified chitosan may be attractive where the project values:
- tunable selectivity
- regeneration potential
- hybrid adsorbent design
- better short-chain targeting in advanced formulations
- bio-based materials strategy
Comparison table
| Parameter | Modified Chitosan Adsorbents | Activated Carbon |
|---|---|---|
| Commercial maturity | Emerging | Established |
| Long-chain PFAS removal | Promising | Strong |
| Short-chain PFAS removal | Potentially strong in advanced designs | Often weaker |
| Regeneration potential | Promising in some formats | Limited or disposal-heavy |
| Design flexibility | Very high | Moderate |
| Sustainability story | Strong | More limited |
| Full-scale field history | Limited | Extensive |
The correct message for buyers is not “replace GAC immediately.” It is “evaluate whether modified chitosan offers a technical or economic advantage for your specific PFAS profile.”
Chitosan vs Ion Exchange Resins for PFAS Removal
Ion exchange is one of the strongest conventional comparators because anion exchange resins are often highly effective for PFAS capture.
Strengths of ion exchange
- strong PFAS selectivity
- often better than GAC for many PFAS, especially sulfonates
- compact bed designs
- established use in drinking water and groundwater polishing
Limitations of ion exchange
- resin cost
- sensitivity to fouling or oxidants in some systems
- pretreatment requirements
- residuals management and replacement strategy
Where modified chitosan may fit
Modified chitosan may appeal where buyers want:
- alternative adsorbent development
- regenerable bio-based media
- composite beads or hydrogels
- lower environmental burden than petroleum-derived resin systems
- custom site-specific media design
Comparison table
| Parameter | Modified Chitosan Adsorbents | Ion Exchange Resins |
|---|---|---|
| Charge-driven PFAS capture | Strong potential | Strong |
| Commercial maturity | Emerging | Established |
| Long-chain PFAS | Promising | Strong |
| Short-chain PFAS | Material-dependent | Often strong, but still compound-dependent |
| Pretreatment sensitivity | System-dependent | Often significant |
| Material customization | High | Moderate |
| Supply standardization | Growing | High |
Where Chitosan Fits in a Real PFAS Treatment Workflow
A realistic PFAS treatment system is rarely just “add media and solve the problem.”
Typical PFAS treatment workflow
PFAS characterization → Water chemistry review → Pretreatment → Adsorption or membrane stage → Residuals management → Monitoring and optimization
Text workflow diagram
Sampling and PFAS speciation
↓
Pretreatment for solids, iron, organics, or oxidants if needed
↓
Primary PFAS capture stage: GAC, IX, RO, or modified chitosan adsorbent
↓
Optional polishing or hybrid media stage
↓
Spent media / brine / concentrate handling
↓
Performance monitoring and breakthrough management
Where chitosan can be integrated
- as the primary adsorbent in pilot systems
- as a polishing medium after bulk PFAS reduction
- as a composite filter material
- as membrane pretreatment support
- as a hybrid system component alongside conventional media
The role depends on whether the project is optimizing for:
- selectivity
- regeneration
- sustainability
- reduced media consumption
- short-chain PFAS performance
- hybrid treatment design
Factors Affecting PFAS Removal Efficiency
PFAS contamination profile
The first design question is always: Which PFAS are present?
PFOS, PFOA, PFHxS, PFBS, PFHxA, GenX, and mixed industrial fluorochemicals do not all behave the same.
Water chemistry
Performance depends heavily on:
- pH
- ionic strength
- sulfate, nitrate, bicarbonate, chloride
- natural organic matter
- suspended solids
- iron and manganese
- competing co-contaminants
Adsorbent design
For chitosan-based materials, performance depends on:
- degree of quaternization
- crosslink density
- porosity
- surface area
- composite chemistry
- bead, hydrogel, powder, fiber, or membrane format
Contact time and flow
Column performance depends on:
- EBCT
- hydraulic loading
- breakthrough criteria
- mass transfer behavior
Regeneration strategy
A material that adsorbs PFAS well but cannot be regenerated economically may not be commercially attractive.
How to Choose the Right Chitosan Material for PFAS Treatment
This is where the article should help serious buyers.
1. Start with the treatment format
Choose the material based on how it will actually be used.
Adsorption columns
Best starting candidates:
- quaternary chitosan
- crosslinked quaternary chitosan beads
- composite bead systems
- structured hydrogels with mechanical strength
Membrane pretreatment or membrane-surface applications
Best starting candidates:
- chitosan hydrochloride for soluble coating-related or pretreatment uses
- carboxymethyl chitosan for water-soluble hydrogel/composite systems
- quaternary derivatives where permanent charge is needed
Composite filters
Best starting candidates:
- quaternary chitosan
- carboxymethyl chitosan
- native chitosan as a base polymer for composite fabrication
- crosslinked formats with carbon/mineral supports
Hybrid treatment technologies
If the project needs PFAS capture plus co-contaminant management, the material choice may differ from a pure drinking-water adsorbent.
Matching Chitosan Global Products to PFAS Applications
Quaternary Chitosan Mushroom
This is usually the most relevant direct starting point for PFAS adsorption development because it is:
- permanently cationic
- water-soluble across wide pH conditions
- better aligned with anionic PFAS capture
- suitable for hydrogel, bead, composite, and adsorption-focused formulations
Best fit: adsorption columns, quaternized hydrogels, composite PFAS media, hybrid polishing systems.
Carboxymethyl Chitosan Mushroom
CMC is useful where:
- water solubility matters
- hydrogel or composite fabrication is important
- the system needs flexible formulation design
- membrane-related or structured adsorbent formats are being developed
Best fit: hydrogel systems, composite filters, membrane-support materials, R&D-scale structured adsorbents.
Chitosan Hydrochloride Mushroom
This grade is best viewed as a functional cationic material for:
- solution-phase formulation
- membrane coating concepts
- pretreatment-oriented hybrid systems
- contaminant capture programs that combine PFAS with other charged pollutants
Best fit: membrane pretreatment support, coating-related systems, hybrid water-treatment formulations.
Native Mushroom Chitosan
Native chitosan is usually not the first choice for direct PFAS adsorption in full-performance systems, but it can still be useful as:
- a sustainable starting polymer
- a precursor for modification
- a base material for composite or crosslinked adsorbent development
- an option where buyers want fungal-origin, high-DDA input material for custom PFAS media fabrication
Best fit: custom adsorbent development, composite synthesis, pilot material prototyping.
Sulphonated Chitosan Mushroom
Sulphonated chitosan is not usually the first choice for direct PFAS capture, because PFAS targets are generally anionic and quaternary/cationic systems are more aligned with that chemistry. However, sulphonated chitosan may still be relevant in:
- composite hybrid systems
- co-contaminant management
- membrane or structured materials where broader pollutant handling matters
- systems targeting cationic contaminants alongside PFAS pretreatment objectives
Best fit: hybrid systems, co-contaminant control, specialized composite engineering rather than primary PFAS adsorption.
Buyer Checklist: What Engineers and Procurement Teams Should Evaluate
Before requesting pricing, buyers should define the technical case clearly.
Water and PFAS profile
- Which PFAS compounds are present?
- What are the key compliance drivers?
- Are short-chain PFAS important?
- Are organics, solids, or metals also present?
Material design requirements
- Does the system need permanent cationic charge?
- Is water solubility needed?
- Does the media need bead/hydrogel/column form?
- Is regeneration required?
Product specifications
- molecular weight
- degree of deacetylation (DDA)
- charge density
- purity
- moisture/ash profile
- batch consistency
- COA availability
Commercial questions
- Can the supplier support pilot-scale quantities?
- Is custom formulation available?
- Can the material be supplied in bulk?
- Is technical support available for media selection and testing?
If the project is moving beyond bench work, it makes sense to work with an industrial chitosan manufacturer or bulk chitosan supplier that can support custom specifications, consistent quality, and application guidance.
Pilot-Scale Implementation: What Good Projects Usually Do
PFAS treatment should not jump directly from lab theory to full-scale purchasing.
Recommended pilot sequence
- Characterize PFAS speciation and water matrix.
- Define target treated-water limits.
- Compare chitosan-based materials with GAC, IX, or both.
- Test fouling sensitivity and pretreatment needs.
- Evaluate regeneration where relevant.
- Compare cost per volume treated, not just media cost.
- Confirm residuals-handling implications.
What to measure
- PFAS breakthrough by compound
- long-chain vs short-chain behavior
- pressure drop or hydraulic stability
- effect of pH and competing ions
- regeneration performance
- handling durability
- real-water vs synthetic-water performance
This is the point where educational CTAs are most useful:
- request technical guidance
- discuss your PFAS treatment challenges
- request laboratory samples
- compare available chitosan grades
- request pilot-scale support
Regeneration, Reuse, and Long-Term Operating Cost
One of the biggest reasons buyers explore new PFAS adsorbents is lifecycle cost.
Why regeneration matters
A PFAS medium may look attractive at bench scale but become expensive if it:
- breaks physically during regeneration
- loses capacity rapidly
- creates difficult waste streams
- cannot be used in practical flow systems
Where modified chitosan looks promising
Some advanced quaternized chitosan hydrogel systems have shown strong regeneration behavior in published studies, including multi-cycle performance. That is encouraging, especially for buyers interested in sustainable PFAS treatment rather than purely disposable media.
Cost questions buyers should ask
- How many cycles are realistic?
- What regeneration chemistry is needed?
- What happens to the desorbed PFAS stream?
- What is the cost per bed life or per m³ treated?
- How does the media compare with GAC or IX in actual site water?
This is where a solution-oriented conversation is more valuable than a catalog request. If you are already evaluating costs, it is reasonable to ask for:
- bulk pricing
- custom formulation options
- application guidance
- comparative bench-testing support
Common Implementation Mistakes
- assuming PFAS is a simple coagulation problem
- buying generic chitosan without matching the chemistry to PFAS adsorption
- ignoring short-chain PFAS behavior
- skipping pretreatment for NOM, solids, iron, or oxidants
- comparing only media cost instead of breakthrough and lifecycle cost
- treating synthetic-water data as proof for real groundwater or industrial wastewater
- using native chitosan where quaternized or crosslinked materials are required
- neglecting regeneration and residuals management
- expecting one medium to solve every PFAS profile equally well
These mistakes are expensive and avoidable.
Practical Recommendation
For PFAS removal, the best-performing technologies today are still often the established ones: activated carbon, ion exchange, and high-pressure membranes. That is the honest baseline. But modified chitosan materials deserve real attention because they offer something those legacy options do not always provide: a highly tunable, bio-based adsorption platform.
That is especially relevant when a project needs:
- better targeting of difficult PFAS profiles
- short-chain PFAS improvement strategies
- regenerable advanced adsorbents
- composite filter development
- membrane pretreatment support
- a sustainable alternative or complement to conventional media
For most serious projects, the right next step is not to assume success. It is to test intelligently:
- define the PFAS profile
- select the right chitosan format
- compare against GAC and IX
- evaluate regeneration
- confirm the economics under real operating conditions
If you are at that stage, Chitosan Global can add the most value by helping you:
- compare chitosan grades
- match product chemistry to PFAS system design
- request laboratory samples
- plan pilot-scale support
- review COA and specification needs
- discuss bulk supply and quotation options
FAQs
What is chitosan for PFAS removal?
It refers to the use of chitosan-based materials—especially modified forms such as quaternized, crosslinked, hydrogel, or composite chitosan—as adsorbents or hybrid treatment materials for removing PFAS from water.
Does chitosan remove all PFAS?
No. Performance depends on the PFAS compound, water chemistry, adsorbent design, and operating conditions. Modified chitosan materials show promise, but no responsible treatment program should assume universal performance without testing.
Is chitosan better than activated carbon for PFAS?
Not universally. Activated carbon remains highly important, especially for long-chain PFAS. Modified chitosan may offer advantages in some advanced or site-specific designs, particularly where regeneration or short-chain targeting is important.
Is chitosan better than ion exchange resin?
Not universally. Ion exchange is one of the strongest established PFAS technologies. Chitosan should be evaluated as an alternative or complementary adsorbent platform, not as an automatic replacement.
Which chitosan material is most suitable for PFAS adsorption?
In most cases, quaternary chitosan is the strongest starting point because permanent cationic charge is highly relevant to anionic PFAS capture.
Can native chitosan be used for PFAS removal?
It can be used as a precursor or in custom materials development, but native chitosan is usually less suitable than modified forms for serious PFAS adsorption applications.
Can chitosan help with short-chain PFAS?
Potentially yes, especially in advanced quaternized hydrogel or composite systems. But short-chain PFAS remain challenging and must be tested carefully.
Is chitosan relevant for drinking water systems?
Yes, mainly as an emerging advanced adsorbent platform or hybrid material. Established drinking-water systems still rely heavily on GAC, IX, and membranes.
Can chitosan be regenerated?
Some modified chitosan systems can be regenerated and reused, which is one reason they are gaining attention. Regeneration performance depends on material design and process conditions.
How should buyers evaluate chitosan for PFAS treatment?
Start with PFAS speciation, water chemistry, and treatment goals. Then compare the chosen chitosan material against established technologies in bench and pilot tests before full-scale adoption.
References
-
ITRC. PFAS Treatment Technologies Guidance
https://pfas-1.itrcweb.org/12-treatment-technologies/ -
U.S. EPA. Reducing PFAS in Drinking Water with Treatment Technologies
https://www.epa.gov/sciencematters/reducing-pfas-drinking-water-treatment-technologies -
Kashani MB et al. Highly Efficient Removal of PFAS from Water Using Surface-Modified Regenerable Quaternized Chitosan Hydrogels
https://pmc.ncbi.nlm.nih.gov/articles/PMC12841056/ -
Chow SJ et al. Comparative Investigation of PFAS Adsorption onto Activated Carbon and Anion Exchange Resins
https://pmc.ncbi.nlm.nih.gov/articles/PMC11330578/ -
Shagdarova B et al. Adsorbent Materials Based on Modified Chitosan for Purification of Wastewater and Fresh Water: Advances, Challenges, and Perspectives
https://pmc.ncbi.nlm.nih.gov/articles/PMC12526536/