University of Oulu

Mahdiyeh Mohammadzadeh, Tiina Leiviskä, Iron-modified peat and magnetite-pine bark biosorbents for levofloxacin and trimethoprim removal from synthetic water and various pharmaceuticals from real wastewater, Industrial Crops and Products, Volume 195, 2023, 116491, ISSN 0926-6690,

Iron-modified peat and magnetite-pine bark biosorbents for levofloxacin and trimethoprim removal from synthetic water and various pharmaceuticals from real wastewater

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Author: Mohammadzadeh, Mahdiyeh1; Leiviskä, Tiina1
Organizations: 1Chemical Process Engineering, University of Oulu, P.O. Box 4300, FIN-90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 7.3 MB)
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Language: English
Published: Elsevier, 2023
Publish Date: 2023-03-28


Humans are at significant risk of antibiotic resistance genes (ARGs) and antimicrobial resistance (AMR) via exposure to pharmaceutical contaminants in water, so there is a strong need for cost-effective environmental solutions to mitigate this crisis. This study introduces iron-modified peat and magnetite-pine bark as efficient, low-cost and green biosorbents for the adsorption of pharmaceutical contaminants from wastewater. Peat biomass, modified by iron extracted from a groundwater treatment sludge was dissolved in acid to prepare the iron-modified peat biosorbent, and pine (Pinus sylvestris) bark as a forest industry by-product was mixed with iron salts (Fe³⁺: Fe²⁺ = 2:1) to obtain the magnetite biosorbent. The adsorption of levofloxacin was little influenced by pH compared to trimethoprim. The equilibrium removal efficiency of antibiotics over both biosorbents was reached after 180 min contact time. The maximum adsorption capacity over iron-modified peat was about 200 mg/g for both antibiotics and over magnetite-pine bark 153.0 mg/g for levofloxacin and 184.1 mg/L for trimethoprim. Possible antibiotic adsorption mechanisms were proposed based on the Fourier transform infrared spectroscopy (FTIR) analysis. Experiments with real wastewater effluent revealed trimethoprim removal of 56.6–84.3% (dosage: 3 g/L). Moreover, a variety of other pharmaceuticals were removed by the biosorbents.

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Series: Industrial crops and products
ISSN: 0926-6690
ISSN-E: 1872-633X
ISSN-L: 0926-6690
Volume: 195
Article number: 116491
DOI: 10.1016/j.indcrop.2023.116491
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
218 Environmental engineering
Funding: The authors would like to thank the EU and the Academy of Finland (Finland, grant number 345509), the Ministry of Health (Israel), Innovationsfonden Denmark (Denmark) and the Water Research Commission (South Africa) for funding, in the frame of the collaborative international consortium (REWA, Reduction and assessment of antimicrobial resistance and emerging pollutants in natural-based water treatment systems) financed under the ERA-NET AquaticPollutants Joint Transnational Call (GA No 869178). ERA-NET is an integral part of the activities developed by the Water, Oceans and AMR Joint Programming Initiatives.
Copyright information: © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (