Special Issue "Sustainable Approaches in Water Treatment Practices, Presenting Minimum Environmental Impact"

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: 22 June 2022.
We are also glad to welcome selected papers on related topics from “The International Conference on Raw Materials and Circular Economy” (RawMat2021, https://www.rawmat2021.gr/congress/) .

Special Issue Editors

Prof. Dr. Anastasios Zouboulis
E-Mail Website
Guest Editor
Laboratory of Chemical & Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: water and wastewater analysis and treatment; solid industrial waste analysis and treatment
Special Issues, Collections and Topics in MDPI journals
Dr. Konstantinos Simeonidis
E-Mail Website
Guest Editor
Analytical Chemistry Laboratory, Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: water analysis; nanoparticle synthesis; X-ray analysis; microscopy analysis
Special Issues, Collections and Topics in MDPI journals
Dr. Evgenios Kokkinos
E-Mail Website
Guest Editor
Laboratory of Chemical & Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: water treatment; adsorption; toxic metal removal; water quality; circular economy

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the promotion of sustainable technologies in the field of water treatment which achieve economic viability and competence with minimum environmental impact. Since water scarcity and contamination are emerging issues in many regions worldwide, securing new water resources through reuse or remediation strategies has turn into a mandatory task of high importance. The need to develop novel approaches gets more intense as international and local authorities adopt strict legislations concerning not only the pollutant levels in water but also the overall outcome in the environment of the used recovery process. For instance, a well-defined and very efficient water treatment method may become invalid under the prism of the upcoming demands for integrated sustainability and documented life cycle analysis. Therefore, the cost of the process, which was traditionally defined by the value of the used materials, chemicals, facilities, and energy, may be determined in the future by the ability to fulfill an environmental footprint target which is set each time. From this point of view, research on the design of modern processes or the proper modification of existing ones will serve as a building substrate towards a new era of symbiosis between human activities and the environment. In this frame, this Special issue will give particular attention to studies on treatment methods related to water management during mineral processing and to groundwater polluted by mining activities.

Prof. Dr. Anastasios Zouboulis
Dr. Konstantinos Simeonidis
Dr. Evgenios Kokkinos
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Water is an international peer-reviewed open access semimonthly 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 2200 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

  • Water treatment
  • Water quality parameters
  • Pollutants removal
  • Sustainable technologies
  • Best practices
  • Drinking water
  • Wastewater
  • Environmental impact
  • Life cycle analysis

Published Papers (1 paper)

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Research

Article
Thiol-Functionalization Carbonaceous Adsorbents for the Removal of Methyl-Mercury from Water in the ppb Levels
Water 2022, 14(1), 49; https://doi.org/10.3390/w14010049 - 27 Dec 2021
Viewed by 389
Abstract
Mercury is a highly toxic pollutant of major public health concern, and human exposure is mainly related to the aqueous phase, where its dominant form is methyl-mercury (MeHg). In the current work, two carbon-based adsorbents, i.e., a commercial activated carbon and a sunflower [...] Read more.
Mercury is a highly toxic pollutant of major public health concern, and human exposure is mainly related to the aqueous phase, where its dominant form is methyl-mercury (MeHg). In the current work, two carbon-based adsorbents, i.e., a commercial activated carbon and a sunflower seeds’ biochar, were modified by the introduction of thiol-active groups onto their surfaces for the MeHg removal from natural-like water in ppb concentration levels. The examined thiol-functionalization was a two-step process, since the raw materials were initially treated with nitric acid (6 N), which is a reagent that favors the formation of surface carboxyl groups, and subsequently by the thiol surface bonding groups through an esterification reaction in methanol matrix. The adsorbents’ capacity was evaluated toward the Hgtotal legislative regulation limit (1 μg/L) in drinking water (denoted as Q1). The respective isothermal adsorption results revealed an increased affinity between MeHg and thiol-functionalized materials, where the commercial carbon showed slightly higher capacity (0.116 μg Hg/mg) compared with the biochar (0.108 μg Hg/mg). This variation can be attributed to the respective higher surface area, resulting, also, to higher thiol groups loading. Regarding the proposed mechanism, it was proved that the S-Hg bond was formed, based on the characterization of the best performed saturated adsorbent. Full article
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Thiol-functionalization carbonaceous adsorbents for me-thyl-mercury removal from water in ppb level
Authors: Evgenios Kokkinos 1,*, Aggeliki Labou 1, Ioannis Kellartzis 2 and Anastasios Zouboulis 1
Affiliation: 1 Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece 2 Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Abstract: Abstract: Mercury considered to be a major public health concern pollutant by the international organizations. Human exposure to mercury is mainly related to the aqueous phase, i.e. the con-sumption of water and fish. However, its dominant form in the aqueous phase is methyl-mercury (MeHg), as through bacterial activity its elemental and inorganic form is methylated. In this work, carbon-based adsorbents, commercial activated carbon and sunflower seeds biochar, were modi-fied by introducing thiol active groups on their surface for MeHg removal from natural-like water in ppb concentration level. The thiol-functionalization was a two-step process since materials were treated with nitric acid (6 N), a reagent that favors the formation of surface carboxyl groups, before thiol surface bonding through an esterification reaction. Adsorbents’ capacity was evalu-ated according to total Hg regulation limit (1 μg/L) in drinking water (Q1). Isothermal adsorption results revealed an increased affinity between MeHg and the thiol-functionalized materials, where the commercial one showed slightly higher capacity compared with the biochar. Such variation was attributed to the higher surface area and thiol groups load of the thiol-functionalized com-mercial activated carbon.

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