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Sunresin’s adsorption resins for removal of perfluorinated pollutants in water and their production and application

Perfluorooctane Sulfonate, as the final degradation product of perfluorinated compounds,  contains multiple fluorocarbon long chains, sulfonic acid, carboxylic acid and other groups in its structure, resulting in its hydrophobic and oleophobic properties. Due to the strong polarity of the C-F bond, PFOS is one of the most difficult to decompose organic pollutants that can accumulate in organic organisms, through respiratory inhalation and intake of drinking water, food, etc.

 

PFOS has multiple toxicities such as genotoxicity, male reproductive toxicity, neurotoxicity, developmental toxicity, and endocrine disrupting effects, and is considered to be a class of environmental pollutants with systemic multi-organ toxicity.

 

Traditional adsorption materials, such as activated carbon materials, have poor removal effect on PFOA in water and cannot be regenerated. At present, the removal methods of perfluorinated compounds in water are mainly divided into two categories: traditional adsorption materials, cotton, cellulose, nylon and reverse osmosis membrane materials are used to remove perfluorinated compounds in water. However, due to low removal efficiency or cost issues, there are few industrial applications. In addition, different from traditional adsorption materials, methods such as light radiation, photocatalysis, molecular imprinting, and induced electrochemistry can be used to degrade trace perfluorinated compounds in water. However, due to harsh conditions, difficult operation, and high energy consumption, practical applications it cannot be widely used.


Type

Methods

Advantages

Disadvantages

Physical separation

Filter

High removal efficiency

easy to use

low cost

Contamination of membrane

Cannot be completely degraded

Adsorbers cannot be reused

Adsorption

Chemical degradation

Oxidative degradation

Can be completely degraded

High cost

Strict reaction conditions

Mainly used to degrade PFOA, few studies on the degradation of PFOS

Photochemical degradation

Sonication

Other methods

Molecular imprinting

More efficient or more specific than traditional methods

High cost, R&D still at an early stage

high temperature plasma

Low temperature plasma


To sum up, in the prior technologies for removing perfluorinated pollutants in water bodies, there is still a lack of adsorbent with low cost, easy operation, and high treatment efficiency.


Sunresin is a high-tech company specializing in the R&D, production and commercialization of adsorption and separation materials, and providing supporting system equipment and overall solutions centered on special adsorption and separation materials.

 

After research and development experiments, Sunresin’s new method of "Adsorption resins for removal of perfluorinated pollutants in water and their production and application" has obtained a national patent.

 

In Sunresin’s method, the hydrophobicity of the resin is further increased, the degree of crosslinking gets increased, and the pore structure gets adjusted. The adsorption resins have a narrow particle size distribution, uniform pore size and high specific surface area. As the size of micropores in the resin is close to the molecular size of perfluorooctanoate in water, which has a strong selectivity of the adsorbates and can therefore further increase the adsorption rate of perfluorinated compounds.

 

This patented technology of Sunresin works for the household water purification and waste water treatment, and can effectively remove perfluorinated pollutants contained in water bodies, reducing the content of perfluorinated substances in the treated water to lower than 70 nanograms per liter.

 

Sunresin’s macroporous adsorption resins can be regenerated, allowing repeated use that can effectively save  costs in industrial applications, and effectively make up for the shortcomings of other methods for removing perfluorinated pollutants.

 

With the innovative achievements of adsorption and separation technology, Sunresin actively participates in green production and promotes the wide application of adsorption and separation technologies in the fields of metal resources, life sciences, water treatment, chemical catalysis, energy conservation & environmental protection, and food processing.


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