Adsorption-assisted membrane filtration with a cellulose derivative for separation of cationic compounds

Year: 2025

Type: article

Abstract: This study explores the first-time use of dicarboxymethyl cellulose (DCMC) in an adsorption-assisted membrane filtration (AMF) process for the removal of cationic compounds from aqueous solutions. DCMC and microfiltration commercial membranes were used in an integrated dead-end filtration system, with Cytochrome C (Cyt C) as a model protein. The experiments were performed in a stirred cell with powdered DCMC on the retentate side. The work evaluated the effect of stirring, contact time and membrane material on the removal efficiency. Regenerated cellulose, polyamide and polyethersulfone membranes were tested, showing no significant differences in performance. High retention was achieved without compromising permeability, with fluxes up to 700 L m -2 h −1 . The filtration performance remained consistent after three consecutive regeneration cycles. The adsorption capacity of DCMC was assessed by discontinuous filtration with a PES membrane and 200 mg of DCMC. Following 38 min of filtration, saturation occurred with approximately 1.8 L of a 100 mg L -1 Cyt C solution. The results showed that the AMF system was successfully employed, with the adsorbent (DCMC) playing a crucial role in the removal of Cyt C

Source: Separation and Purification Technology

DOI: 10.1016/j.seppur.2025.133646

Authors: Diana Gago, Ândria Viegas, Ricardo Chagas, Luísa M. Ferreira, Isabel Coelhoso

Institutions: LAQV Requimte, Laboratório de Análises LAQV-REQUIMTE, Universidade Nova de Lisboa, University of Lisbon, Laboratório Associado TERRA

Language: English

Topic: Membrane Separation Technologies

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $4,060

Funders: Ministério da Ciência, Tecnologia e Ensino Superior, Rede de Química e Tecnologia, Laboratório Associado para a Química Verde, Fundação para a Ciência e a Tecnologia

OpenAlex ID: W4410529852