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Special Issue "Advanced Materials and Technologies for Wastewater Treatment"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Photochemistry".

Deadline for manuscript submissions: 30 November 2019

Special Issue Editor

Guest Editor
Prof. Dr. Ming-Chung Wu

Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan
Website | E-Mail
Interests: nanomaterials synthesis; photocatalytic materials; photocatalysis applications; perovskite solar cells; VOC sensing materials

Special Issue Information

Dear Colleagues,

Among critical contemporary ecological threats, water pollution is probably one that everybody is aware of. Owing to the rapid industrialization, the increasing amount of components in water bodies, such as organic and inorganic waste, dyes, and heavy metals, is jeopardizing our health. Presently, numerous methods, including membrane filtration, ion exchange, biological degradation, advanced oxidation, photocatalytic degradation, and adsorption, have been adopted to minimize the impacts of the influx of waste released from industry. Therefore, enforcing new approaches to the synthesis of advanced materials will lead to a better society characterized by the pursuit of a sustainable environment.

This Special Issue will provide a forum to disseminate new developments in materials and techniques. Researchers in the field are cordially invited to submit relevant manuscripts concerning the development of innovative material for a Special Issue entitled “Advanced Materials and Technologies for Wastewater Treatment” within the journal Molecules.

Prof. Dr. Ming-Chung Wu
Guest Editor

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. Molecules 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 1800 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

  • Photocatalysis
  • Membrane filtration
  • Ion exchange
  • Biological degradation
  • Nanomaterials
  • Carbon materials
  • Metal oxides
  • Titanium dioxide
  • Water purification
  • Waste water treatment
  • Photodegradation
  • Reaction mechanism

Published Papers (1 paper)

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Research

Open AccessArticle
Interaction of Arsenic Species with Organic Ligands: Competitive Removal from Water by Coagulation-Flocculation-Sedimentation (C/F/S)
Molecules 2019, 24(8), 1619; https://doi.org/10.3390/molecules24081619
Received: 15 March 2019 / Revised: 18 April 2019 / Accepted: 22 April 2019 / Published: 24 April 2019
PDF Full-text (3288 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
The co-occurrence of arsenic (As) and organic ligands in water bodies has raised environmental concerns due to their toxicity and adverse effects on human health. The present study aims to elucidate the influences of hydrophobic/hydrophilic organic ligands, such as humic acid (HA) and [...] Read more.
The co-occurrence of arsenic (As) and organic ligands in water bodies has raised environmental concerns due to their toxicity and adverse effects on human health. The present study aims to elucidate the influences of hydrophobic/hydrophilic organic ligands, such as humic acid (HA) and salicylic acid (SA), on the interactive behavior of As species in water. Moreover, the competitive removal behaviors of As(III, V) species and total organic carbon (TOC) were systematically investigated by coagulation-flocculation-sedimentation (C/F/S) under various aqueous matrices. The results showed the stronger binding affinity of As(V) than As(III) species, with a higher complexation ability of hydrophobic ligands than hydrophilic. The media containing hydrophilic ligands require smaller ferric chloride (FC) doses to achieve the higher As(III, V) removal, while the optimum FC dose required for As(III) removal was found to be higher than that for As(V). Moreover, hydrophobic ligands showed higher TOC removal than hydrophilic ligands. The pronounced adverse effect of a higher concentration of hydrophobic ligands on the removal efficiencies of As(V) and TOC was observed. The adsorption of As(V) on Fe precipitates was better fitted with the Langmuir model but the Freundlich isotherm was more suitable for As(III) in the presence of hydrophilic SA. Moreover, TOC removal was substantially decreased in the As(V) system as compared to the As(III) system due to the dissolution of Fe precipitates at higher As(V) concentrations. The results of FC composite flocs demonstrated that the combined effect of oxidation, charge neutralization and adsorption played an important role in the removal of both toxicants during the C/F/S process. In summary, the findings of the present study provide insights into the fate, mobility and competitive removal behavior of As(III, V) species and organic ligands in the water treatment process. Full article
(This article belongs to the Special Issue Advanced Materials and Technologies for Wastewater Treatment)
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