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Water
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Efficiency Evaluation of Water Treatment
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Efficiency Evaluation of Water Treatment

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

Deadline for manuscript submissions: closed (31 March 2021) | Viewed by 4463

Special Issue Editors

Prof. Dr. Habil. Maria Harja

E-Mail Website
Guest Editor
Department of Chemical Engineering, Gheorghe Asachi Technical University of Iasi, Iasi, Romania
Interests: flocculation–coagulation; heavy metal pollutants; low cost adsorbents; wastewater treatment; waste recycling; waste management
Special Issues, Collections and Topics in MDPI journals
Dr. Lidia Favier

E-Mail Website
Guest Editor
Ecole Nationale Supérieure de Chimie de Rennes, Univ Rennes, CNRS, ISCR–UMR6226, F-35000 Rennes, France
Interests: microorganisms; microbial enzymes; whole cells biocatalysis; biotransformation; bioremediation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The current crisis of raw water imposes the advanced treatment of wastewater, respecting the requirements before reuse or disposal. The efficiency of wastewater treatments depends on certain factors that determine how to improve removal efficiency. The challenge today is to consider water treatment as a complex process that must be analyzed in a unitary manner, considering all interdependence among mechanical, physical, chemical, electrochemical, photocatalytical, biological, etc., processes.

The aim of a wastewater treatment plant is the production of desired quality water at the lowest cost, which means improving efficiency. This can be realized by: decreasing operating costs; increasing final water quality; improving treatment processes; minimizing the environmental, health, and safety impact; reducing waste; etc.

The main objectives of this Special Issue on “Efficiency Evaluation of Water Treatment” are to evaluate the efficiency of wastewater treatment and share discoveries to find efficient treatment methods and improve the instruments for evaluation, in order to obtain water that can be reused. To this end, the efficiency evaluation of new materials (membranes, adsorbents, catalysts/photocatalysts, coating materials, polymers, carbon nanotubes, chitosan, hydroxyapatite, etc.), filtration/microfiltration, ion exchangers resin, coagulation/flocculation, electrocoagulation, photocatalysis, osmosis, etc., shall be considered.

Prof. Dr. Habil. Maria Harja
Assoc. Prof. Dr. Lidia Favier
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 submissions that pass pre-check are 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 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

  • Mechanical processes efficiency
  • Chemical treatment efficiency
  • Coagulation/flocculation treatment efficiency
  • Heavy metal removal efficiency
  • Indicators for efficiency evaluation
  • New analysis methods for wastewater treatment
  • New materials used in wastewater treatment

Published Papers (1 paper)

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Research

18 pages, 4261 KiB  
Article
TiO2 Doped with Noble Metals as an Efficient Solution for the Photodegradation of Hazardous Organic Water Pollutants at Ambient Conditions
by Amalia Maria Sescu, Lidia Favier, Doina Lutic, Nicolas Soto-Donoso, Gabriela Ciobanu and Maria Harja
Water 2021, 13(1), 19; https://doi.org/10.3390/w13010019 - 24 Dec 2020
Cited by 42 | Viewed by 3881
Abstract
This work highlights new insights into the performance of TiO2 doped with noble metal catalysts for the photocatalytic degradation of organic water pollutants. Different samples of titanium dioxide doped with noble metals (Au and Pd) were successfully synthesized via incipient wet impregnation [...] Read more.
This work highlights new insights into the performance of TiO2 doped with noble metal catalysts for the photocatalytic degradation of organic water pollutants. Different samples of titanium dioxide doped with noble metals (Au and Pd) were successfully synthesized via incipient wet impregnation (IWI) and ultrasound-assisted impregnation (US) methods. X-ray diffraction, scanning electron microscopy and UV-Vis reflectance spectroscopy were used for the characterization of the obtained materials. Their photocatalytic efficiency was investigated in aqueous suspension thorough a series of laboratory tests performed under ultraviolet (UV-A) irradiation conditions using 2,4 dinitrophenol (2,4 DNP) as a target molecule. The results clearly show that the method used for the catalyst synthesis affects its photocatalytic activity. It was found that the samples prepared by the IWI method exhibited high photocatalytic activity, and the removal rate obtained with TiO2-Pd/IWI was higher than that found for TiO2-Au/IWI. Furthermore, for the best catalyst, some extra photocatalytic experiments were conducted with rhodamine 6G (R6G), a highly stable molecule with a very different chemical structure to 2,4 DNP, in order to check the reactivity of this material. Moreover, the recycling experiments carried out with TiO2-Pd/IWI clearly demonstrated the high photocatalytic stability of this material for the degradation of 2,4 DNP. All of the collected data confirmed the interesting photocatalytic potential of the selected catalyst in the elimination of organic pollutants with no obvious change in its reactivity after four reaction cycles, which is very promising for promoting future applications in water depollution. Full article
(This article belongs to the Special Issue Efficiency Evaluation of Water Treatment)
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