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Emerging Materials for Attaining Carbon Neutrality in Water Treatment

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (20 June 2023) | Viewed by 2907

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Guest Editor
College of Ecology and Environment, Xiamen University, Xiamen 361102, China
Interests: adsorption; advanced oxidation process; membrane filtration; photodegradation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

For this Special Issue, we are seeking relevant articles presenting new advances in the use of novel materials to achieve sustainable, green and carbon-neutral water treatment. We aim to address the following questions: Can wastewater treatment applications be expanded to recovering resources such as nutrients or energy? Can unused materials be used for this purpose? By thinking globally and acting locally to support a circular economy (CE), resource recovery by using industrial/agricultural byproducts to remove another form of waste through an engineering approach can protect the environment and conserve resources.

Topics of interest for this Special Issue include, but are not limited to, ‘emerging materials’ that eventually contribute to:

  • Carbon neutrality and aquatic ecosystem remediation;
  • Waste valorization and its reuse;
  • Reduction in carbon intensity and operational cost of wastewater treatment;
  • Advanced wastewater treatment process;
  • Energy recovery from wastewater treatment;
  • Nutrient recovery from municipal wastewater;
  • Greenhouse gas emission reduction during wastewater treatment;
  • Global water sustainability;
  • Water-enabled electricity generation.

Dr. Tonni Agustiono Kurniawan
Guest Editor

Manuscript Submission Information

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Keywords

  • adsorption
  • functional materials
  • carbon neutrality
  • climate change

Published Papers (2 papers)

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Research

10 pages, 2181 KiB  
Article
Characteristics and Sonophotocatalytic Activity of Natural Sphalerite under Ultrasonic (1.7 MHz) and UVA LED (365 nm) Irradiation
by Svetlana Popova, Victoria Tazetdinova, Erzhena Pavlova, Galina Matafonova and Valeriy Batoev
Materials 2022, 15(15), 5412; https://doi.org/10.3390/ma15155412 - 05 Aug 2022
Cited by 1 | Viewed by 1258
Abstract
Naturally occurring sono- and photoactive minerals, which are abundant on Earth, represent an attractive alternative to the synthesized sonophotocatalysts as cost-effective materials for water and wastewater treatment. This study focuses on characterizing and evaluating the sonophotocatalytic activity of natural sphalerite (NatS) from Dovatka [...] Read more.
Naturally occurring sono- and photoactive minerals, which are abundant on Earth, represent an attractive alternative to the synthesized sonophotocatalysts as cost-effective materials for water and wastewater treatment. This study focuses on characterizing and evaluating the sonophotocatalytic activity of natural sphalerite (NatS) from Dovatka deposit (Siberia) under high-frequency ultrasonic (US, 1.7 MHz) and ultraviolet light-emitting diodes (UVA LED, 365 nm) irradiation towards degradation of 4-chlorophenol as a model organic pollutant. Since raw natural sphalerite did not exhibit a measurable photocatalytic activity, it was calcined at 500, 900 and 1200 °C. The natural sphalerite after calcination at 900 °C (NatS*) was found to be the most effective for sonophotocatalytic degradation of 4-chlorophenol, attaining the highest efficiency (55%, 1 h exposure) in the following row: UV < US ≈ UV/US ≈ US/NatS* < UV/NatS* < UV/US/NatS*. Addition of 1 mM H2O2 increased the removal to 74% by UV/US/NatS*/H2O2 process. An additive effect between UV/NatS* and US/NatS* processes was observed in the sonophotocatalytic system as well as in the H2O2-assisted system. We assume that the sonophotocatalytic hybrid process, which is based on the simultaneous use of high-frequency ultrasound, UVA light, calcined natural sphalerite and H2O2, could provide a basis of an environmentally safe and cost-effective method of elimination of organic pollutants from aqueous media. Full article
(This article belongs to the Special Issue Emerging Materials for Attaining Carbon Neutrality in Water Treatment)
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13 pages, 2230 KiB  
Article
Treatment of As(III)-Laden Contaminated Water Using Iron-Coated Carbon Fiber
by Dun Fu, Tonni Agustiono Kurniawan, Herong Gui, Songbao Feng, Qian Li and Mohd Hafiz Dzarfan Othman
Materials 2022, 15(12), 4365; https://doi.org/10.3390/ma15124365 - 20 Jun 2022
Cited by 28 | Viewed by 1759
Abstract
This work presents the fabrication, characterization, and application of iron-coated carbon fiber (Fe@CF), synthesized in a facile in situ iron reduction, for As(III) removal from an aqueous solution. The physico-chemical properties of the composite were characterized using Brunauer–Emmett–Teller (BET) surface area, scanning electron [...] Read more.
This work presents the fabrication, characterization, and application of iron-coated carbon fiber (Fe@CF), synthesized in a facile in situ iron reduction, for As(III) removal from an aqueous solution. The physico-chemical properties of the composite were characterized using Brunauer–Emmett–Teller (BET) surface area, scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared (FTIR) spectroscopy. Adsorption studies were evaluated in batch experiments with respect to reaction time, the dose of adsorbent, As(III) initial concentration, pH, and co-existing ions. The results showed that the BET surface area and pore volume of Fe@CF slightly decreased after Fe coating, while its pore size remained, while the SEM and XRD analyses demonstrated that the Fe was successfully anchored on the CF. A maximum As(III) adsorption of 95% was achieved with an initial As concentration of 1.5 mg/L at optimum conditions (30 min of reaction time, 1 g/L of dose, 1 mg/L of As(III) concentration, and pH 3.5). Since the treated effluents could not meet the strict discharge standard of ≤10 μg/L set by the World Health Organization (WHO), a longer reaction time is required to complete the removal of remaining As(III) in the wastewater effluents. As compared to the other adsorbents reported previously, the Fe@CF composite has the highest As(III) removal. Overall, the findings suggested that the use of Fe@CF as an adsorbent is promising for effective remediation in the aquatic environment. Full article
(This article belongs to the Special Issue Emerging Materials for Attaining Carbon Neutrality in Water Treatment)
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