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Removal of Emerging Contaminants from Waters Using Nanotechnology
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Removal of Emerging Contaminants from Waters Using Nanotechnology

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 May 2021) | Viewed by 12599

Special Issue Editor

Assist. Prof. Chang Min Park

E-Mail Website
Guest Editor
Kyungpook National University
Interests: Adsorption; Degradation; Environmental nanotechnology; Fate and transport of nanomaterials; Membrane filtration
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The availability of clean and fresh waters is a critical component to maintaining a healthy life for humans and wildlife. Emerging contaminants (ECs) are chemical compounds widely detected in both wastewater effluent and drinking water, and they have become a global issue in recent decades. Most ECs are not regulated by local governments due to the lack of rules and standards and thus can potentially cause hazardous effects in aquatic ecosystems at low and environmentally-relevant concentrations of ECs. Conventional water and wastewater treatment, coupled with increased industrial activities, may be inadequate to effectively remove the various kinds of ECs, and so, further treatments are necessary. Therefore, a significant amount of research should be conducted on the development of environmental nanotechnology for its application on the removal of ECs from water sources. This Special Issue welcomes research into recent advances in both experimental and modeling works on the removal of ECs from water and wastewater. Articles on different themes related to ECs, such as fate and transport of ECs in aquatic systems; toxicity of ECs on aquatic life; and perspectives/reviews on the effectiveness of low-cost materials for the removal of ECs are also welcome.

Assist. Prof. Chang Min Park
Guest Editor

Manuscript Submission Information

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Keywords

  • Emerging contaminants (ECs)
  • Removal of ECs from waters
  • Water and wastewater treatment
  • Environmental nanotechnology
  • Fate and transport of ECs
  • Toxicity of ECs on aquatic life
  • Effectiveness of low-cost materials

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Published Papers (3 papers)

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Research

21 pages, 7655 KiB  
Article
Visible-Light-Driven Bio-Templated Magnetic Copper Oxide Composite for Heterogeneous Photo-Fenton Degradation of Tetracycline
by Olushola Adewole Alani, Hadiza Abdullahi Ari, Susanna Olushola Alani, Nnanake-Abasi O. Offiong and Wei Feng
Water 2021, 13(14), 1918; https://doi.org/10.3390/w13141918 - 12 Jul 2021
Cited by 11 | Viewed by 3996
Abstract
The development of a visible-light-driven, reusable, and long-lasting catalyst for the heterogeneous photo-Fenton process is critical for practical application in the treatment of contaminated water. This study focuses on synthesizing a visible-light-driven heterogenous bio-templated magnetic copper oxide composite (Fe3O4/CuO/C) [...] Read more.
The development of a visible-light-driven, reusable, and long-lasting catalyst for the heterogeneous photo-Fenton process is critical for practical application in the treatment of contaminated water. This study focuses on synthesizing a visible-light-driven heterogenous bio-templated magnetic copper oxide composite (Fe3O4/CuO/C) by a two-step process of bio-templating and hydrothermal processes. The prepared composite was characterized by field emission-scanning electron microscope (FE-SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), electrical impedance spectroscopy (EIS), and vibrating sample magnetometer (VSM). The results reveal that the prepared composite retains the template’s (corn stalk’s) original porous morphology, and a substantial amount of CuO and Fe3O4 particles are loaded onto the surface of the template. The prepared Fe3O4/CuO/C composite was employed as a catalyst for heterogeneous photo-Fenton degradation of tetracycline (TC) irradiated by visible light. The prepared Fe3O4/CuO/C catalyst has high efficiency towards TC degradation within 60 min across a wide pH range irradiated by visible light, which is attributed to its readily available interfacial boundaries, which significantly improves the movement of photoexcited electrons across various components of the prepared composite. The influence of other parameters such as initial H2O2 concentration, initial concentration of TC, and catalyst dosages was also studied. In addition to high efficiency, the prepared catalyst’s performance was sustained after five cycles, and its recovery is aided by the use of an external magnetic field. This research paper highlights the development of a heterogeneous catalyst for the elimination of refractory organic compounds in wastewater. Full article
(This article belongs to the Special Issue Removal of Emerging Contaminants from Waters Using Nanotechnology)
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12 pages, 2405 KiB  
Article
Characterization of 1,4-Dioxane Biodegradation by a Microbial Community
by Kang Hoon Lee, Young Min Wie and Yong-Soo Lee
Water 2020, 12(12), 3372; https://doi.org/10.3390/w12123372 - 1 Dec 2020
Cited by 11 | Viewed by 3307
Abstract
In this study, a microbial community of bacteria was investigated for 1,4-dioxane(1,4-D) biodegradation. The enriched culture was investigated for 1,4-dioxane mineralization, co-metabolism of 1,4-dioxane and extra carbon sources, and characterized 1,4-dioxane biodegradation kinetics. The mineralization test indicates that the enriched culture was able [...] Read more.
In this study, a microbial community of bacteria was investigated for 1,4-dioxane(1,4-D) biodegradation. The enriched culture was investigated for 1,4-dioxane mineralization, co-metabolism of 1,4-dioxane and extra carbon sources, and characterized 1,4-dioxane biodegradation kinetics. The mineralization test indicates that the enriched culture was able to degrade 1,4-dioxane as the sole carbon and energy source. Interestingly, the distribution of 1,4-dioxane into the final biodegrading products were 36.9% into biomass, 58.3% completely mineralized to CO2, and about 4% escaped as VOC. The enriched culture has a high affinity with 1,4-dioxane during biodegradation. The kinetic coefficients of the Monod equation were qmax = 0.0063 mg 1,4-D/mg VSS/h, Ks = 9.42 mg/L, YT = 0.43 mg VSS/mg 1,4-dioxane and the decay rate was kd = 0.023 mg/mg/h. Tetrahydrofuran (THF) and ethylene glycol were both consumed together with 1,4-dioxane by the enriched culture; however, ethylene glycol did not show any influence on 1,4-dioxane biodegradation, while THF proved to be a competitive. Full article
(This article belongs to the Special Issue Removal of Emerging Contaminants from Waters Using Nanotechnology)
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16 pages, 4936 KiB  
Article
Preparation of Activated Biochar-Supported Magnetite Composite for Adsorption of Polychlorinated Phenols from Aqueous Solutions
by Byung-Moon Jun, Yejin Kim, Jonghun Han, Yeomin Yoon, Jeonggwan Kim and Chang Min Park
Water 2019, 11(9), 1899; https://doi.org/10.3390/w11091899 - 11 Sep 2019
Cited by 24 | Viewed by 4453
Abstract
For this study, we applied activated biochar (AB) and its composition with magnetite (AB-Fe3O4) as adsorbents for the removal of polychlorophenols in model wastewater. We comprehensively characterized these adsorbents and performed adsorption tests under several experimental parameters. Using FTIR, [...] Read more.
For this study, we applied activated biochar (AB) and its composition with magnetite (AB-Fe3O4) as adsorbents for the removal of polychlorophenols in model wastewater. We comprehensively characterized these adsorbents and performed adsorption tests under several experimental parameters. Using FTIR, we confirmed successful synthesis of AB-Fe3O4 composite through cetrimonium bromide surfactant. We conducted adsorption tests using AB and AB-Fe3O4 to treat model wastewater containing polychlorophenols, such as 2,3,4,6-Tetrachlorophenol (TeCP), 2,4,6-Trichlorophenol (TCP), and 2,4-Dichlorophenol (DCP). Results of the isotherm and the kinetic experiments were well adapted to Freundlich’s isotherm model and the pseudo-second-order kinetic model, respectively. Main adsorption mechanisms in this study were attributed to non-covalent, π-electron acceptor–donor interactions and hydrophobic interactions judging from the number of chloride elements in each chlorophenol and its hydrophobic characteristics. We also considered the electrostatic repulsion effect between TeCP and AB, because adsorption performance of TeCP at basic condition was slightly worse than at weak acidic condition. Lastly, AB-Fe3O4 showed high adsorption selectivity of TeCP compared to other persistent organic pollutants (i.e., bisphenol A and sulfamethoxazole) due to hydrophobic interactions. We concluded that AB-Fe3O4 may be used as novel adsorbent for wastewater treatment including toxic and hydrophobic organic pollutants (e.g., TeCP). Full article
(This article belongs to the Special Issue Removal of Emerging Contaminants from Waters Using Nanotechnology)
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