Work

The effect of filter cake structure on adsorption of perfluoroalkyl substances

Year: 2025

Type: article

Abstract: Compared to fixed bed adsorbers, cake filtration of adsorbents to remove dilute impurities offers flexibility and the possibility to simultaneously remove solid impurities. Here, we show the influence of adsorbent bed structure deposited by cake filtration, on the adsorption of perfluoroalkyl substances. Cake structure was varied by using the filter-aid cellulose as either a precoat layer or by simultaneous filtration. Precoat filtration showed on average a ≈20% better kinetic adsorption performance compared to simultaneous filtration of filter-aid and adsorbent. Additionally, we found that increasing the amount of filter-aid used during filtration has adverse effects on the subsequent kinetic adsorption performance, but no influence on the adsorption equilibrium. These findings should be taken into consideration when designing processes where either an adsorbent is filtered using a filter-aid or a filter-aid with adsorptive properties is used.

Source: Separation and Purification Technology

DOI: 10.1016/j.seppur.2025.133819

Authors: J.B. Roman, A.J.B. Kemperman, W.G.J. van der Meer, J.A. Wood

Institution: University of Twente

Language: English

Topic: Per- and polyfluoroalkyl substances research

Subfield: Environmental Chemistry

Field: Environmental Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,060

OpenAlex ID: W4411265166

FWCI: 0.293

Cites: 31

Cited by: 1

Related to: 10