A waste-to-wealth conversion of plastic bottles into effective carbon-based adsorbents for removal of tetracycline antibiotic from water

Currently, plastic waste and antibiotic wastewater are two of the most critical environmental problems, calling for urgent measures to take. A waste-to-wealth strategy for the conversion of polyethylene terephthalate (PET) plastic bottles into value-added materials such as carbon composite is highly...

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Veröffentlicht in:Environmental research 2024-08, Vol.255, p.119144-119144, Article 119144
Hauptverfasser: Duong, Loan Thi Kim, Nguyen, Thuy Thi Thanh, Nguyen, Luan Minh, Hoang, Thu Hien, Nguyen, Duyen Thi Cam, Tran, Thuan Van
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container_end_page 119144
container_issue
container_start_page 119144
container_title Environmental research
container_volume 255
creator Duong, Loan Thi Kim
Nguyen, Thuy Thi Thanh
Nguyen, Luan Minh
Hoang, Thu Hien
Nguyen, Duyen Thi Cam
Tran, Thuan Van
description Currently, plastic waste and antibiotic wastewater are two of the most critical environmental problems, calling for urgent measures to take. A waste-to-wealth strategy for the conversion of polyethylene terephthalate (PET) plastic bottles into value-added materials such as carbon composite is highly recommended to clean wastewater contaminated by antibiotics. Inspired by this idea, we develop a novel PET-AC-ZFO composite by incorporating PET plastic-derived KOH-activated carbon (AC) with ZnFe2O4 (ZFO) particles for adsorptive removal of tetracycline (TTC). PET-derived carbon (PET-C), KOH-activated PET-derived carbon (PET-AC), and PET-AC-ZFO were characterized using physicochemical analyses. Central composite design (CCD) was used to obtain a quadratic model by TTC concentration (K), adsorbent dosage (L), and pH (M). PET-AC-ZFO possessed micropores (d ≈ 2 nm) and exceptionally high surface area of 1110 m2 g−1. Nearly 90% TTC could be removed by PET-AC-ZFO composite. Bangham kinetic and Langmuir isotherm were two most fitted models. Theoretical maximum TTC adsorption capacity was 45.1 mg g−1. This study suggested the role of hydrogen bonds, pore-filling interactions, and π-π interactions as the main interactions of the adsorption process. Thus, a strategy for conversion of PET bottles into PET-AC-ZFO can contribute to both plastic recycling and antibiotic wastewater mitigation. •PET plastic bottles were converted into effective carbon-based adsorbents at 700 °C.•PET-AC-ZFO obtained micropores and exceptionally high surface area of 1110 m2 g−1•Theoretical maximum TTC adsorption capacity by PET-AC-ZFO was 45.1 mg g−1•PET-AC-ZFO could be reusable up to 6 times using acetic acid as an eluent solvent.
doi_str_mv 10.1016/j.envres.2024.119144
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subjects Adsorption
Anti-Bacterial Agents - chemistry
Antibiotic pollution
Carbon - chemistry
PET
Plastic waste
Plastics - chemistry
Polyethylene Terephthalates - chemistry
Tetracycline
Tetracycline - chemistry
Wastewater - chemistry
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - chemistry
Water Purification - methods
ZnFe2O4 impregnation
title A waste-to-wealth conversion of plastic bottles into effective carbon-based adsorbents for removal of tetracycline antibiotic from water
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