Cargando…

Waste-Based Ceramsite for the Efficient Removal of Ciprofloxacin in Aqueous Solutions

Ciprofloxacin (CIP), a compound with bioaccumulation toxicity and antibiotic resistance, is frequently detected in water at alarming concentrations, which is becoming an increasing concern. In this study, a low-cost ceramsite was developed from industrial solid wastes through sintering to remove CIP...

Descripción completa

Detalles Bibliográficos
Autores principales: Qin, Juan, Fang, Yeting, Shi, Jian, Tokoro, Chiharu, Córdova-Udaeta, Mauricio, Oyama, Keishi, Zhang, Juncheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10049662/
https://www.ncbi.nlm.nih.gov/pubmed/36981951
http://dx.doi.org/10.3390/ijerph20065042
_version_ 1785014507153653760
author Qin, Juan
Fang, Yeting
Shi, Jian
Tokoro, Chiharu
Córdova-Udaeta, Mauricio
Oyama, Keishi
Zhang, Juncheng
author_facet Qin, Juan
Fang, Yeting
Shi, Jian
Tokoro, Chiharu
Córdova-Udaeta, Mauricio
Oyama, Keishi
Zhang, Juncheng
author_sort Qin, Juan
collection PubMed
description Ciprofloxacin (CIP), a compound with bioaccumulation toxicity and antibiotic resistance, is frequently detected in water at alarming concentrations, which is becoming an increasing concern. In this study, a low-cost ceramsite was developed from industrial solid wastes through sintering to remove CIP from wastewater. The effects of adsorbent dosage, initial pH, contact time, initial CIP concentration, and temperature were explored. More than 99% of CIP (20–60 mg/L) was removed at around pH 2–4 by the ceramsite. The kinetic data fitted well with the pseudo-second-order model, revealing that chemisorption was the main rate-determining step. The isotherm data was better described by the Freundlich model, suggesting that CIP was removed by the formation of multiple layers on the heterogeneous surface. Moreover, the removal efficiency was practically higher than 95% during five regeneration cycles, when different regeneration methods were used, including calcination, HCl, and NaOH washing, indicating that the ceramsite exhibited outstanding reusability in removing CIP. The primary mechanism of CIP removal by the ceramsite was found to be the synergism of adsorption and flocculation, both of which depended on the release of Ca(2+) from the ceramsite. In addition, strong Ca-CIP complexes could be formed through surface complexation and metal cation bridging between Ca(2+) and different functional groups in CIP.
format Online
Article
Text
id pubmed-10049662
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-100496622023-03-29 Waste-Based Ceramsite for the Efficient Removal of Ciprofloxacin in Aqueous Solutions Qin, Juan Fang, Yeting Shi, Jian Tokoro, Chiharu Córdova-Udaeta, Mauricio Oyama, Keishi Zhang, Juncheng Int J Environ Res Public Health Article Ciprofloxacin (CIP), a compound with bioaccumulation toxicity and antibiotic resistance, is frequently detected in water at alarming concentrations, which is becoming an increasing concern. In this study, a low-cost ceramsite was developed from industrial solid wastes through sintering to remove CIP from wastewater. The effects of adsorbent dosage, initial pH, contact time, initial CIP concentration, and temperature were explored. More than 99% of CIP (20–60 mg/L) was removed at around pH 2–4 by the ceramsite. The kinetic data fitted well with the pseudo-second-order model, revealing that chemisorption was the main rate-determining step. The isotherm data was better described by the Freundlich model, suggesting that CIP was removed by the formation of multiple layers on the heterogeneous surface. Moreover, the removal efficiency was practically higher than 95% during five regeneration cycles, when different regeneration methods were used, including calcination, HCl, and NaOH washing, indicating that the ceramsite exhibited outstanding reusability in removing CIP. The primary mechanism of CIP removal by the ceramsite was found to be the synergism of adsorption and flocculation, both of which depended on the release of Ca(2+) from the ceramsite. In addition, strong Ca-CIP complexes could be formed through surface complexation and metal cation bridging between Ca(2+) and different functional groups in CIP. MDPI 2023-03-13 /pmc/articles/PMC10049662/ /pubmed/36981951 http://dx.doi.org/10.3390/ijerph20065042 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Qin, Juan
Fang, Yeting
Shi, Jian
Tokoro, Chiharu
Córdova-Udaeta, Mauricio
Oyama, Keishi
Zhang, Juncheng
Waste-Based Ceramsite for the Efficient Removal of Ciprofloxacin in Aqueous Solutions
title Waste-Based Ceramsite for the Efficient Removal of Ciprofloxacin in Aqueous Solutions
title_full Waste-Based Ceramsite for the Efficient Removal of Ciprofloxacin in Aqueous Solutions
title_fullStr Waste-Based Ceramsite for the Efficient Removal of Ciprofloxacin in Aqueous Solutions
title_full_unstemmed Waste-Based Ceramsite for the Efficient Removal of Ciprofloxacin in Aqueous Solutions
title_short Waste-Based Ceramsite for the Efficient Removal of Ciprofloxacin in Aqueous Solutions
title_sort waste-based ceramsite for the efficient removal of ciprofloxacin in aqueous solutions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10049662/
https://www.ncbi.nlm.nih.gov/pubmed/36981951
http://dx.doi.org/10.3390/ijerph20065042
work_keys_str_mv AT qinjuan wastebasedceramsitefortheefficientremovalofciprofloxacininaqueoussolutions
AT fangyeting wastebasedceramsitefortheefficientremovalofciprofloxacininaqueoussolutions
AT shijian wastebasedceramsitefortheefficientremovalofciprofloxacininaqueoussolutions
AT tokorochiharu wastebasedceramsitefortheefficientremovalofciprofloxacininaqueoussolutions
AT cordovaudaetamauricio wastebasedceramsitefortheefficientremovalofciprofloxacininaqueoussolutions
AT oyamakeishi wastebasedceramsitefortheefficientremovalofciprofloxacininaqueoussolutions
AT zhangjuncheng wastebasedceramsitefortheefficientremovalofciprofloxacininaqueoussolutions