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Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay
The problem of purifying domestic and hospital wastewater from pharmaceutical compounds is becoming more and more urgent every year, because of the continuous accumulation of chemical pollutants in the environment and the limited availability of freshwater resources. Clay adsorbents have been repeat...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8468575/ https://www.ncbi.nlm.nih.gov/pubmed/34575834 http://dx.doi.org/10.3390/ijms22189670 |
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author | Kryuchkova, Marina Batasheva, Svetlana Akhatova, Farida Babaev, Vasily Buzyurova, Daina Vikulina, Anna Volodkin, Dmitry Fakhrullin, Rawil Rozhina, Elvira |
author_facet | Kryuchkova, Marina Batasheva, Svetlana Akhatova, Farida Babaev, Vasily Buzyurova, Daina Vikulina, Anna Volodkin, Dmitry Fakhrullin, Rawil Rozhina, Elvira |
author_sort | Kryuchkova, Marina |
collection | PubMed |
description | The problem of purifying domestic and hospital wastewater from pharmaceutical compounds is becoming more and more urgent every year, because of the continuous accumulation of chemical pollutants in the environment and the limited availability of freshwater resources. Clay adsorbents have been repeatedly proposed as adsorbents for treatment purposes, but natural clays are hydrophilic and can be inefficient for catching hydrophobic pharmaceuticals. In this paper, a comparison of adsorption properties of pristine montmorillonite (MMT) and montmorillonite modified with stearyl trimethyl ammonium (hydrophobic MMT-STA) towards carbamazepine, ibuprofen, and paracetamol pharmaceuticals was performed. The efficiency of adsorption was investigated under varying solution pH, temperature, contact time, initial concentration of pharmaceuticals, and adsorbate/adsorbent mass ratio. MMT-STA was better than pristine MMT at removing all the pharmaceuticals studied. The adsorption capacity of hydrophobic montmorillonite to pharmaceuticals decreased in the following order: carbamazepine (97%) > ibuprofen (95%) > paracetamol (63–67%). Adsorption isotherms were best described by Freundlich model. Within the pharmaceutical concentration range of 10–50 µg/mL, the most optimal mass ratio of adsorbates to adsorbents was 1:300, pH 6, and a temperature of 25 °C. Thus, MMT-STA could be used as an efficient adsorbent for deconta×ating water of carbamazepine, ibuprofen, and paracetamol. |
format | Online Article Text |
id | pubmed-8468575 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-84685752021-09-27 Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay Kryuchkova, Marina Batasheva, Svetlana Akhatova, Farida Babaev, Vasily Buzyurova, Daina Vikulina, Anna Volodkin, Dmitry Fakhrullin, Rawil Rozhina, Elvira Int J Mol Sci Article The problem of purifying domestic and hospital wastewater from pharmaceutical compounds is becoming more and more urgent every year, because of the continuous accumulation of chemical pollutants in the environment and the limited availability of freshwater resources. Clay adsorbents have been repeatedly proposed as adsorbents for treatment purposes, but natural clays are hydrophilic and can be inefficient for catching hydrophobic pharmaceuticals. In this paper, a comparison of adsorption properties of pristine montmorillonite (MMT) and montmorillonite modified with stearyl trimethyl ammonium (hydrophobic MMT-STA) towards carbamazepine, ibuprofen, and paracetamol pharmaceuticals was performed. The efficiency of adsorption was investigated under varying solution pH, temperature, contact time, initial concentration of pharmaceuticals, and adsorbate/adsorbent mass ratio. MMT-STA was better than pristine MMT at removing all the pharmaceuticals studied. The adsorption capacity of hydrophobic montmorillonite to pharmaceuticals decreased in the following order: carbamazepine (97%) > ibuprofen (95%) > paracetamol (63–67%). Adsorption isotherms were best described by Freundlich model. Within the pharmaceutical concentration range of 10–50 µg/mL, the most optimal mass ratio of adsorbates to adsorbents was 1:300, pH 6, and a temperature of 25 °C. Thus, MMT-STA could be used as an efficient adsorbent for deconta×ating water of carbamazepine, ibuprofen, and paracetamol. MDPI 2021-09-07 /pmc/articles/PMC8468575/ /pubmed/34575834 http://dx.doi.org/10.3390/ijms22189670 Text en © 2021 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 Kryuchkova, Marina Batasheva, Svetlana Akhatova, Farida Babaev, Vasily Buzyurova, Daina Vikulina, Anna Volodkin, Dmitry Fakhrullin, Rawil Rozhina, Elvira Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay |
title | Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay |
title_full | Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay |
title_fullStr | Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay |
title_full_unstemmed | Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay |
title_short | Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay |
title_sort | pharmaceuticals removal by adsorption with montmorillonite nanoclay |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8468575/ https://www.ncbi.nlm.nih.gov/pubmed/34575834 http://dx.doi.org/10.3390/ijms22189670 |
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