Special Issue "Advanced Technologies and Materials for Polluted Water Remediation"

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

Deadline for manuscript submissions: closed (25 June 2022) | Viewed by 1726

Special Issue Editor

Prof. Dr. Liuchun Zheng
E-Mail Website
Guest Editor
School of Environment, South China Normal University, Guangzhou, China
Interests: heavy metal; organic pollutants; adsorption; membrane separation; technology; mechanism; theoretical calculation

Special Issue Information

Dear Colleagues,

Water is an indispensable resource in human life, industrial and agricultural production. As an important part of the ecological environment, water is an important guarantee for the healthy and sustainable development of human beings and the ecological environment. However, with the development of the social economy and the acceleration of urbanization, water pollution is becoming more and more serious, and water security is obviously under threat. Therefore, seeking efficient remediation methods for polluted water has become an important research content. Meanwhile, the development of high-performance and cost-effective mate-rials is also crucial for water pollution control. These materials can be adsorbents, membrane separation materials, or biomaterials. In any case, the corresponding water treatment technology of these materials is not only the hot spot concerned by the majority of researchers but also the technical information expected by many readers.

Prof. Dr. Liuchun Zheng
Guest Editor

Manuscript Submission Information

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Keywords

  • heavy metal
  • organic pollutants
  • adsorption
  • membrane separation
  • technology
  • mechanism
  • theoretical calculation

Published Papers (2 papers)

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Research

Article
Comparison of Adsorptive Removal of Fluoride from Water by Different Adsorbents under Laboratory and Real Conditions
Water 2022, 14(9), 1423; https://doi.org/10.3390/w14091423 - 29 Apr 2022
Viewed by 387
Abstract
The fluoride removal capability of six different adsorbents (four commercial, i.e., titanium dioxide-TiO2, ArsenXPnp-A33E, granular activated carbon (GAC) and granular ferric hydroxide (GFH), and two laboratory media, i.e., nano-fine media and nano-granular media) was determined under batch conditions using [...] Read more.
The fluoride removal capability of six different adsorbents (four commercial, i.e., titanium dioxide-TiO2, ArsenXPnp-A33E, granular activated carbon (GAC) and granular ferric hydroxide (GFH), and two laboratory media, i.e., nano-fine media and nano-granular media) was determined under batch conditions using synthetic and real contaminated water containing arsenic and vanadium. The kinetic and equilibrium characteristics of the adsorption process under different operating conditions (pH value, initial fluoride concentration, adsorbent dosage, water composition) were obtained. Among the tested adsorbents, TiO2 showed the highest adsorption capacity; it was also capable of reducing fluoride concentration below the limit set for drinking water without pH control. TiO2 still remained the best adsorbent in the treatment of real contaminated groundwater, where it was also capable of efficiently removing both arsenic and vanadium. The other adsorbents were capable of achieving the same fluoride reduction, although only for acid pH. The nano-sized laboratory media showed an adsorption removal efficiency below that of TiO2 but superior to that of A33E, GAC and GFH. Among the investigated parameters, the removal efficiency was mainly affected by adsorbent dosage and pH. The pseudo-second order model best fitted the kinetic experimental data of all the media. The maximum adsorption capacity predicted by this model was in the following decreasing order: TiO2 > A33E > GAC > GFH. The removal capability of all the media drastically decreased due to the presence of competitive ions and unfavorable pH conditions. The best isotherm model changed depending on the type of adsorbent and pH conditions. Full article
(This article belongs to the Special Issue Advanced Technologies and Materials for Polluted Water Remediation)
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Article
Enhanced Ozone Oxidation by a Novel Fe/[email protected]γ−Al2O3 Nanocatalyst: The Role of Hydroxyl Radical and Singlet Oxygen
Water 2022, 14(1), 19; https://doi.org/10.3390/w14010019 - 22 Dec 2021
Cited by 1 | Viewed by 1006
Abstract
Catalytic ozonation is a potential alternative to address the dye wastewater effluent, and developing an effective catalyst for catalyzing ozone is desired. In this study, a novel Fe/[email protected]γ−Al2O3 nanomaterial was prepared and successfully utilized for catalytic ozonation toward [...] Read more.
Catalytic ozonation is a potential alternative to address the dye wastewater effluent, and developing an effective catalyst for catalyzing ozone is desired. In this study, a novel Fe/[email protected]γ−Al2O3 nanomaterial was prepared and successfully utilized for catalytic ozonation toward dye wastewater effluent components (dimethyl phthalate and 1−naphthol). The synthesized Fe/[email protected]γ−Al2O3 exhibited superior activity in catalytic ozonation of dimethyl phthalate and 1−naphthol in contrast to [email protected]γ−Al2O3 and [email protected]γ−Al2O3. Quench and probe tests indicated that HO° contributed to almost all removal of dimethyl phthalate, whereas O3, HO°, and singlet oxygen participated in the degradation of 1−naphthol in the Fe/[email protected]γ−Al2O3/O3 system. The results of XPS, FT−IR, and EPR suggested that HO° and singlet oxygen were generated from the valence variations of Fe(II/III)and Mn(III/IV). Moreover, the Fe/[email protected]γ−Al2O3/O3 system could also have excellent efficacy in actual water samples, including dye wastewater effluent. This study presents an efficient ozone catalyst to purify dye wastewater effluent and deepens the comprehension of the role and formation of reactive species involved in the catalytic ozonation system. Full article
(This article belongs to the Special Issue Advanced Technologies and Materials for Polluted Water Remediation)
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