Dual-driven magnetic nanoadsorbent

Universal PFCA capture

Integrating electrostatic and hydrophobic interactions in one magnetic nanocomposite for fast, high-capacity adsorption of ultrashort to long-chain PFCAs with magnetic recovery and regeneration.

Zhao, Xu · An, Lihui · Zhu, Bo · Wang, Hongbo · Liu, Jianli

Journal of Colloid and Interface Science 2026

Specifications

TFA adsorption capacity

{'zh': '83.37', 'en': '83.37'} mg/g

TFA uptake enhancement in mixture

{'zh': '165.47', 'en': '165.47'} %

Trace-level PFAS removal efficiency

{'zh': '90', 'en': '90'} %

PFNA residual capacity after 5 cycles

{'zh': '27.46', 'en': '27.46'} mg/g

Advantages

Captures all chain lengths

Synergistic electrostatic and hydrophobic interactions enable high capacity for TFA through PFNA on a single material, eliminating the need for separate adsorbents per chain length.

Ultrashort chains removed

Even TFA reaches 83.37 mg/g; coexistence of long-chain PFAS boosts TFA uptake by 165.47%.

Reaches equilibrium fast

Pseudo-second-order kinetics govern, with equilibrium reached within 20–50 min for all three PFCAs, suitable for rapid treatment.

Recoverable and reusable

High magnetization (22.63 emu/g) enables magnetic recovery; after five regeneration cycles, TFA reuse efficiency remains 87.91%.

Applications

• PFAS removal from water：Directly magnetically removes all chain-length PFCAs from water without secondary pollution.
• Functionalized magnetic materials：The material itself is a functionalized magnetic adsorbent combining separation and capture.
• Advanced wastewater treatment：Used for advanced removal of trace and ultrashort-chain PFAS that conventional processes miss.