Work

Bio-activation and mathematical modeling of ZIF-L encapsulated with laccase for enhanced ibuprofen removal from wastewater

Year: 2024

Type: article

Abstract: This work explores the bio-activation of zeolitic imidazolate framework (ZIF-L) by laccase encapsulation for enhanced performance of emerging pollutant removal from wastewater. ZIF-L exhibits high surface area, porosity, and selective adsorption characteristics, which contribute to its effective adsorption of ibuprofen. Under the same conditions, the ibuprofen removal increased from 50% using bare ZIF-L to 83% using bio-activated ZIF-L. The Kinetics and thermodynamics of ibuprofen adsorption on ZIF-L were studied and mathematically modeled. The effect of laccase encapsulation inside the ZIF-L crystals was thoroughly investigated using a diffusion-reaction model, which was solved numerically using a finite difference explicit scheme. The results showed deep ibuprofen penetration within the ZIF-L crystal containing encapsulated laccase. The bio-activated ZIF-L was used in a fixed-bed column to study the continuous removal of ibuprofen. The dynamic behavior of the continuous fixed-bed system was mathematically modeled to predict the concentration profiles and breakthrough curves at various initial ibuprofen concentrations. This study presents a novel approach demonstrating the positive effect of laccase catalytic activity in enhancing the performance of ZIF-L as an adsorbent for ibuprofen removal. The approach offers an effective, economical, and environmentally friendly method to remove emerging pollutants from wastewater. • Utilizing ZIF- bio-activated with laccase is effective biocatalysis for ibuprofen removal. • Ibuprofen removal rate was significantly higher using the bioactive ZIF-L as compared to ZIF-L alone. • Diffusion-reaction kinetics model was used to describe the process. • Continuous ibuprofen removal was achieved using a fixed-bed column packed with bioactive ZIF-L.

Source: Cleaner Engineering and Technology

DOI: 10.1016/j.clet.2024.100875

Authors: Ayat Hassan, Shadi W. Hasan, Bart Van der Bruggen, Sulaiman Al-Zuhair

Institutions: United Arab Emirates University, Khalifa University of Science and Technology, KU Leuven

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

Open Access status: gold

Estimated APC paid: $1,470