Adsorption of Emerging Contaminants from the Environment

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Toxicity Reduction and Environmental Remediation".

Deadline for manuscript submissions: closed (20 April 2023) | Viewed by 2088

Special Issue Editors


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Guest Editor
Chemical Process Engineering and Forest Products Research Centre, University of Coimbra, Coimbra, Portugal
Interests: adsorption; heavy metals; silica; aerogel

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Guest Editor
Chemical Process Engineering and Forest Products Research Centre, University of Coimbra, Coimbra, Portugal
Interests: adsorption; ion-exchange; membrane technology; wastewater treatment; seawater desalination; CO2 sequestration
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Special Issue Information

Dear Colleagues,

Contaminants in water have negative effects on our health and on ecosystems. In Ancient Rome, lead plumbing contaminated drinking water, and many believe this led to the downfall of the Roman empire. Today, we are discovering new and unregulated molecules in wastewater and natural watercourses, such as surfactants, pesticides, drugs, cosmetics, etc. We have started to call these molecules emerging contaminants, and their toxicity and ecotoxicity are still unclear. We could speculate that these substances may have been present in watercourses for decades without being detected. However, due to the lack of regulations, their concentration will only increase. Thus, understanding the effects of emerging pollutants and studying their removal are fundamental for a safer and cleaner future. There are several physical, chemical, and biological processes that have some disadvantages in terms of removal efficiency, sludge generation, high investment and operating costs, toxicity issues, etc. The adsorption process presents relevant advantages such as low cost, high efficiency, and simplicity of operation, and therefore, it is considered a promising method for removing emerging pollutants from aqueous streams.

In this context, in this Special Issue, we welcome the submission of articles regarding the contamination of natural sites/wastewaters by emerging contaminants and the latest advancements in the adsorption of this group of pollutants using new adsorbent materials and design systems.

Dr. João P. Vareda
Dr. Licínio M. Gando-Ferreira
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Toxics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • adsorption
  • emerging pollutants
  • water pollution
  • persistent organic pollutants
  • remediation

Published Papers (1 paper)

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Research

29 pages, 6545 KiB  
Article
Carbon Nanostructures—Silica Aerogel Composites for Adsorption of Organic Pollutants
by Alyne Lamy-Mendes, David Lopes, Ana V. Girão, Rui F. Silva, Wim J. Malfait and Luísa Durães
Toxics 2023, 11(3), 232; https://doi.org/10.3390/toxics11030232 - 28 Feb 2023
Cited by 3 | Viewed by 1708
Abstract
Silica aerogels are a class of materials that can be tailored in terms of their final properties and surface chemistry. They can be synthesized with specific features to be used as adsorbents, resulting in improved performance for wastewater pollutants’ removal. The purpose of [...] Read more.
Silica aerogels are a class of materials that can be tailored in terms of their final properties and surface chemistry. They can be synthesized with specific features to be used as adsorbents, resulting in improved performance for wastewater pollutants’ removal. The purpose of this research was to investigate the effect of amino functionalization and the addition of carbon nanostructures to silica aerogels made from methyltrimethoxysilane (MTMS) on their removal capacities for various contaminants in aqueous solutions. The MTMS-based aerogels successfully removed various organic compounds and drugs, achieving adsorption capacities of 170 mg⋅g−1 for toluene and 200 mg⋅g−1 for xylene. For initial concentrations up to 50 mg⋅L−1, removals greater than 71% were obtained for amoxicillin, and superior to 96% for naproxen. The addition of a co-precursor containing amine groups and/or carbon nanomaterials was proven to be a valuable tool in the development of new adsorbents by altering the aerogels’ properties and enhancing their adsorption capacities. Therefore, this work demonstrates the potential of these materials as an alternative to industrial sorbents due to their high and fast removal efficiency, less than 60 min for the organic compounds, towards different types of pollutants. Full article
(This article belongs to the Special Issue Adsorption of Emerging Contaminants from the Environment)
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