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Environmental Functional Materials for Liquid Waste Disposal
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Environmental Functional Materials for Liquid Waste Disposal

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601). This special issue belongs to the section "Chemoenvironment".

Deadline for manuscript submissions: closed (21 November 2023) | Viewed by 5246

Special Issue Editor

Dr. Hong Xiao

E-Mail Website
Guest Editor
College of Environmental Sciences, Sichuan Agricultural University (Chengdu Campus), Chengdu 611130, China
Interests: water pollution; advanced oxidation; treatment

Special Issue Information

Dear Colleagues,

Liquid waste generated by human activities can have potentially harmful effects on the environment and human health. From a sustainable perspective, disposing of waste at the same time as recycling resources is a necessary venture. To achieve this goal, environmental functional materials (EFMs) with distinctive physical, chemical and biological properties, as well as excellent environmental purification performance, are the preferred solutions. EFMs play an important role in various fields of environmental protection, either alone or in combination with other materials, and have been developing rapidly in recent decades. This Special Issue plans to give an overview of the most recent advances in EFMs developed for liquid waste disposal, and will provide selected contributions on advances in the synthesis, characterization, and application of EFMs with regard to liquid waste disposal and resource recovery. Potential topics include, but are not limited to: photocatalytic material, electrocatalytic material, adsorbing material, membrane separation material, advanced oxidative material, ion exchange resin, and bio-carriers.

Dr. Hong Xiao
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 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. International Journal of Environmental Research and Public Health is an international peer-reviewed open access monthly 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 2500 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

  • catalyst
  • membrane
  • energy conversion
  • bio-carrier
  • advanced oxidation
  • Ion exchange
  • adsorbent

Published Papers (3 papers)

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Research

12 pages, 3078 KiB  
Article
Immobilization of EreB on Acid-Modified Palygorskite for Highly Efficient Degradation of Erythromycin
by Shensheng Ni, Chunyu Li, Yicheng Yu, Dongze Niu, Jie Zhu, Dongmin Yin, Chongqing Wang, Wenfan Zhang, Xingmei Jiang and Jianjun Ren
Int. J. Environ. Res. Public Health 2022, 19(17), 11064; https://doi.org/10.3390/ijerph191711064 - 04 Sep 2022
Cited by 1 | Viewed by 1705
Abstract
Erythromycin is one of the most commonly used macrolide antibiotics. However, its pollution of the ecosystem is a significant risk to human health worldwide. Currently, there are no effective and environmentally friendly methods to resolve this issue. Although erythromycin esterase B (EreB) specifically [...] Read more.
Erythromycin is one of the most commonly used macrolide antibiotics. However, its pollution of the ecosystem is a significant risk to human health worldwide. Currently, there are no effective and environmentally friendly methods to resolve this issue. Although erythromycin esterase B (EreB) specifically degrades erythromycin, its non-recyclability and fragility limit the large-scale application of this enzyme. In this work, palygorskite was selected as a carrier for enzyme immobilization. The enzyme was attached to palygorskite via a crosslinking reaction to construct an effective erythromycin-degradation material (i.e., EreB@modified palygorskite), which was characterized using FT-IR, SEM, XRD, and Brunauer–Emmett–Teller techniques. The results suggested the successful modification of the material and the loading of the enzyme. The immobilized enzyme had a higher stability over varying temperatures (25–65 °C) and pH values (6.5–10.0) than the free enzyme, and the maximum rate of reaction (Vmax) and the turnover number (kcat) of the enzyme increased to 0.01 mM min−1 and 169 min−1, respectively, according to the enzyme-kinetics measurements. The EreB@modified palygorskite maintained about 45% of its activity after 10 cycles, and degraded erythromycin in polluted water to 20 mg L−1 within 300 min. These results indicate that EreB could serve as an effective immobilizing carrier for erythromycin degradation at the industrial scale. Full article
(This article belongs to the Special Issue Environmental Functional Materials for Liquid Waste Disposal)
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14 pages, 2450 KiB  
Article
Effects of pH and Metal Ions on the Hydrothermal Treatment of Penicillin: Kinetic, Pathway, and Antibacterial Activity
by Qiaopan Zhang, Dongze Niu, Shensheng Ni, Wenying An, Chunyu Li, Taoli Huhe, Chongqing Wang, Xingmei Jiang and Jianjun Ren
Int. J. Environ. Res. Public Health 2022, 19(17), 10701; https://doi.org/10.3390/ijerph191710701 - 27 Aug 2022
Cited by 3 | Viewed by 1337
Abstract
Antibiotic residues lead to the risk of resistance gene enrichment, which is the main reason why penicillin mycelial dreg (PMD) is defined as hazardous waste. Hydrothermal treatment (HT) is an effective method to treat penicillin mycelial dreg, but the degradation mechanism of penicillin [...] Read more.
Antibiotic residues lead to the risk of resistance gene enrichment, which is the main reason why penicillin mycelial dreg (PMD) is defined as hazardous waste. Hydrothermal treatment (HT) is an effective method to treat penicillin mycelial dreg, but the degradation mechanism of penicillin is unclear. In the study, we researched the effects of pH (4–10) at 80–100 °C and metal ions (Mn2+, Fe2+, Cu2+, and Zn2+) at several concentrations on the HT of penicillin, identified the degradation products (DPs) under different conditions, and evaluated the antibacterial activity of hydrothermally treated samples. The results show that penicillin degradation kinetics highly consistent with pseudo-first-order model (R2 = 0.9447–0.9999). The degradation rates (k) at pH = 4, 7, and 10 were 0.1603, 0.0039, and 0.0485 min−1, indicating acidic conditions were more conducive to penicillin degradation. Among the four tested metal ions, Zn2+ had the most significant catalytic effect. Adding 5 mg·L−1 Zn2+ caused 100% degradation rate at pH = 7 after HT for 60 min. Six degradation products (DPs) with low mass-to-charge (m/z ≤ 335) were detected under acidic condition. However, only two and three DPs were observed in the samples catalyzed by Zn2+ and alkali, respectively, and penilloic acid (m/z = 309) was the main DPs under these conditions. Furthermore, no antibacterial activity to Bacillus pumilus was detected in the medium with up to 50% addition of the treated samples under acidic condition. Even though acid, alkali, and some metal ions can improve the degradation ability of penicillin, it was found that the most effective way for removing its anti-bacterial activity was under the acidic condition. Therefore, resistance residue indicates the amount of additive in the process of resource utilization, and avoids the enrichment of resistance genes. Full article
(This article belongs to the Special Issue Environmental Functional Materials for Liquid Waste Disposal)
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15 pages, 3509 KiB  
Article
Carbon Quantum Dots-Functionalized UiO-66-NH2 Enabling Efficient Infrared Light Conversion of 5-Hydroxymethylfurfuryl with Waste Ethanol into 5-Ethoxymethylfurfural
by Hong Xiao, Yunting Zhang, Junran Gong, Kexin Li, Xing Chen, Dexin Fang, Guochun Lv, Ganxue Wu, Shihuai Deng and Zhenxing Zeng
Int. J. Environ. Res. Public Health 2022, 19(16), 10437; https://doi.org/10.3390/ijerph191610437 - 22 Aug 2022
Cited by 1 | Viewed by 1719
Abstract
The catalytic etherification of 5-hydroxymethylfurfural (HMF) with the waste ethanol into high-energy-density 5-ethoxymethylfurfural (EMF) has been considered as a promising way to simultaneously alleviate the energy crisis and environmental pollution. However, the energy consumption is rather high as the synthesis of EMF requires [...] Read more.
The catalytic etherification of 5-hydroxymethylfurfural (HMF) with the waste ethanol into high-energy-density 5-ethoxymethylfurfural (EMF) has been considered as a promising way to simultaneously alleviate the energy crisis and environmental pollution. However, the energy consumption is rather high as the synthesis of EMF requires a high temperature to open the etherification reaction. Herein, we demonstrate a clever design and construction of acidified biomass-derived carbon quantum dots (BCQDs)-modified UiO-66-NH2 that is immobilized on cermasite (H+/BCQDs/UiO-66-NH2@ceramsite), which can use the IR light as driven energy and wasted ethanol to trigger the catalytic conversion of HMF into EMF. The temperature on the surface of the immobilized catalyst could reach as high as 139 °C within 15 min IR irradiation. Due to the aforementioned advantages, the as-prepared catalyst exhibited excellent IR-triggered catalytic performance toward EMF production, where the EMF yields and selectivity were as high as 45% and 65%, respectively. The high catalytic performance originates from the outstanding photo-to-thermal conversion by the introduction of BCQDs, as well as the strong interactions between BCQDs and UiO-66-NH2 that boosts the etherification reactions. The immobilization of catalyst on cermasite not only benefits catalyst recycling, but more importantly reduces catalyst loss during practical applications. The conceptual study shown here provides new viewpoints in designing energy-effective materials for the conversion of wastes into high-value-added resources. Full article
(This article belongs to the Special Issue Environmental Functional Materials for Liquid Waste Disposal)
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