Work

The efficient adsorption and removal of levofloxacin by hyperbranched polyamide-aminated dialdehyde cellulose hydrogel

Year: 2025

Type: article

Abstract: Levofloxacin (LEV), a widely used quinolone antibiotic, persists in aquatic environments and is difficult to degrade. Its significant toxicity can exacerbate the spread of antibiotic resistance through environmental transmission, making it a pollutant that urgently requires attention. As a new type of porous adsorbent material, hydrogels offer abundant adsorption sites during the adsorption process, making them widely used in water pollution treatment. In the present work, sodium periodate was used to oxidize cellulose to synthesize easily modified diacetyl cellulose (DAC). Subsequently, hyperbranched polyamides (HBP) containing multiple amine groups were ammoniated and crosslinked with DAC. Hyperbranched ammoniated double aldehyde cellulose hydrogels (HBP-DAC@SA) featuring a three-dimensional porous structure were prepared. The microstructure of HBP-DAC@SA was analyzed to investigate the adsorption performance of HBP-DAC@SA on LEV pollutants. The effects of synthesis temperature, pH, and HBP-DAC dosage on the adsorption properties of LEV were investigated through orthogonal experiments. The adsorption capacity of HBP-DAC@SA for LEV reaches up to 216.72 mg·g −1 . The adsorption kinetics and adsorption isotherm data are consistent with the quasi-secondary adsorption model and the Langmuir isothermal adsorption model, respectively. Furthermore, the adsorption capacity of HBP-DAC@SA remained at 80 % of its initial capacity after 14 cycles of adsorption/desorption. HBP-DAC@SA is easily recyclable and exhibits excellent reusability. Consequently, it can serve as an effective adsorbent material for treating LEV pollution. • Hyperbranched ammoniated bialdehyde cellulose hydrogels were prepared. • Development of a Scatchard-Klotz theoretical adsorption model for hydrogels. • The new hydrogel is easily recyclable and exhibits excellent reusability. • The novel hydrogel has efficient adsorption properties for LEV.

Source: Results in Chemistry

DOI: 10.1016/j.rechem.2025.102712

Authors: Houhuang Tao, Xue Yu, Lanqing Li, Maria De Los Angeles, Na Wang

Institutions: Anhui Sanlian University, Northeast Agricultural University, Zhejiang A & F University

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production, Good health and well-being

Open Access status: gold

Estimated APC paid: $1,870