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Molecules
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Application of Engineered Nanomaterials for Environmental Remediation and Water Treatment
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Application of Engineered Nanomaterials for Environmental Remediation and Water Treatment

A special issue of Molecules (ISSN 1420-3049).

Deadline for manuscript submissions: closed (30 April 2020) | Viewed by 18607

Special Issue Editors

Dr. Adeyemi S. Adeleye

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, Henry Samueli School of Engineering, University of California, Irvine, CA 92697-2175, USA
Interests: environmental chemistry; environmental nanotechnology; emerging contaminants; remediation; water treatment
Dr. Yuxiong Huang

E-Mail Website
Guest Editor
Environmental and New Energy Technology Research Center, Tsinghua-Berkeley Shenzhen Institute (TBSI), Shenzhen, China
Interests: environmental applications and implications of nanotechnology

Special Issue Information

Dear Colleagues,

Engineered nanomaterials can promote environmental sustainability by playing important roles in environmental remediation, particularly in cases that are challenging for conventional treatment methods. Engineered nanomaterials can also be tailored by modifying their composition, morphology, surface properties, and reactivity to address specific contaminants in a wide variety of matrices. Engineered nanomaterials remove chemical and biological contaminants via adsorption, disinfection, redox reactions, transformation, catalysis, etc., and their use may be cost-effective, compared to some well-established conventional treatment methods.

Nanotechnology may be used as a sole method of pollutant removal but it can also be combined with other well-established treatment methods, such as chemical oxidation, bioremediation, enzymatic degradation, and filtration.

Researchers working in the field of environmental applications of nanotechnology are cordially invited to contribute original research papers or critical reviews to this Special Issue of Molecules, which will focus on recent advances in the use of engineered nanomaterials and engineered nanomaterial-enabled devices for water/wastewater treatment and environmental remediation. Papers in this Special Issue will focus on the synthesis and application of novel and cheap nanoscale materials, combined treatment technologies based on nanomaterials and other methods, life-cycle analysis of nanotechnology-based treatment techniques, pilot-scale and field-scale testing of nanotechnology-based treatments, and considerations for the environmental implications of nanotechnology.

Dr. Adeyemi S. Adeleye
Dr. Yuxiong Huang
Guest Editors

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. 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 2700 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

  • Environmental nanotechnology
  • Water treatment
  • Wastewater treatment
  • Environmental remediation
  • Fate and transport of nanomaterials
  • Nanotoxicity
  • Nano-bio interaction
  • Nanomaterial life-cycle analysis
  • Nanocomposites

Published Papers (3 papers)

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Research

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14 pages, 1788 KiB  
Communication
Increased Adsorption of Heavy Metal Ions in Multi-Walled Carbon Nanotubes with Improved Dispersion Stability
by Carolina Rodríguez, Sebastián Briano and Eduardo Leiva
Molecules 2020, 25(14), 3106; https://doi.org/10.3390/molecules25143106 - 8 Jul 2020
Cited by 34 | Viewed by 3645
Abstract
In recent years, carbon nanotubes (CNTs) have been intensively studied as an effective adsorbent for the removal of pollutants from wastewater. One of the main problems for its use corresponds to the agglomeration of the CNTs due to the interactions between them, which [...] Read more.
In recent years, carbon nanotubes (CNTs) have been intensively studied as an effective adsorbent for the removal of pollutants from wastewater. One of the main problems for its use corresponds to the agglomeration of the CNTs due to the interactions between them, which prevents using their entire surface area. In this study, we test the effect of dispersion of oxidized multi-walled carbon nanotubes (MWCNTs) on the removal of heavy metals from acidic solutions. For this, polyurethane filters were dyed with a well-dispersed oxidized MWCNTs solution using chemical and mechanical dispersion methods. Filters were used in column experiments, and the sorption capacity increased more than six times (600%) compared to experiments with suspended MWCNTs. Further, kinetic experiments showed a faster saturation on MWCNTs in column experiments. These results contribute to a better understanding of the effect of dispersion on the use of CNTs as heavy metal ions adsorbent. Full article
(This article belongs to the Special Issue Application of Engineered Nanomaterials for Environmental Remediation and Water Treatment)
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19 pages, 4867 KiB  
Article
Size and Shape-Dependent Antimicrobial Activities of Silver and Gold Nanoparticles: A Model Study as Potential Fungicides
by Francis J. Osonga, Ali Akgul, Idris Yazgan, Ayfer Akgul, Gaddi B. Eshun, Laura Sakhaee and Omowunmi A. Sadik
Molecules 2020, 25(11), 2682; https://doi.org/10.3390/molecules25112682 - 9 Jun 2020
Cited by 75 | Viewed by 4412
Abstract
Plant-based pathogenic microbes hinder the yield and quality of food production. Plant diseases have caused an increase in food costs due to crop destruction. There is a need to develop novel methods that can target and mitigate pathogenic microbes. This study focuses on [...] Read more.
Plant-based pathogenic microbes hinder the yield and quality of food production. Plant diseases have caused an increase in food costs due to crop destruction. There is a need to develop novel methods that can target and mitigate pathogenic microbes. This study focuses on investigating the effects of luteolin tetraphosphate derived silver nanoparticles (LTP-AgNPs) and gold nanoparticles (LTP-AuNPs) as a therapeutic agent on the growth and expression of plant-based bacteria and fungi. In this study, the silver and gold nanoparticles were synthesized at room temperature using luteolin tetraphosphate (LTP) as the reducing and capping agents. The synthesis of LTP-AgNPs and LTP-AuNP was characterized by Transmission Electron Microscopy (TEM) and size distribution. The TEM images of both LTP-AgNPs and LTP-AuNPs showed different sizes and shapes (spherical, quasi-spherical, and cuboidal). The antimicrobial test was conducted using fungi: Aspergillus nidulans, Trichaptum biforme, Penicillium italicum, Fusarium oxysporum, and Colletotrichum gloeosporioides, while the class of bacteria employed include Pseudomonas aeruginosa, Aeromonas hydrophila, Escherichia coli, and Citrobacter freundii as Gram (−) bacteria, and Listeria monocytogenes and Staphylococcus epidermidis as Gram (+) bacterium. The antifungal study demonstrated the selective size and shape-dependent capabilities in which smaller sized spherical (9 nm) and quasi-spherical (21 nm) AgNPs exhibited 100% inhibition of the tested fungi and bacteria. The LTP-AgNPs exhibited a higher antimicrobial activity than LTP-AuNPs. We have demonstrated that smaller sized AgNPs showed excellent inhibition of A. nidulans growth compared to the larger size nanoparticles. These results suggest that LTP-AuNP and LTP-AgNPs could be used to address the detection and remediation of pathogenic fungi, respectively. Full article
(This article belongs to the Special Issue Application of Engineered Nanomaterials for Environmental Remediation and Water Treatment)
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Review

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17 pages, 1078 KiB  
Review
Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics
by Fang Wang, Min Zhang, Wei Sha, Yidong Wang, Huizhi Hao, Yuanyuan Dou and Yao Li
Molecules 2020, 25(8), 1827; https://doi.org/10.3390/molecules25081827 - 16 Apr 2020
Cited by 142 | Viewed by 9968
Abstract
Nano and microplastics (NPs/MPs) have received widespread attention in recent years. Because of their large specific surface area and hydrophobicity, NPs/MPs can adsorb various organic contaminants. This article gives a brief review of the sorption behavior of organic contaminants to NPs/MPs, summarizes the [...] Read more.
Nano and microplastics (NPs/MPs) have received widespread attention in recent years. Because of their large specific surface area and hydrophobicity, NPs/MPs can adsorb various organic contaminants. This article gives a brief review of the sorption behavior of organic contaminants to NPs/MPs, summarizes the possible sorption mechanisms, and analyzes the influencing factors in the environment on the sorption behavior and mechanisms of NPs/MPs. The main mechanisms of sorption of organic contaminants to NPs/MPs are partitioning, surface sorption (hydrogen bonding, π–π interaction, electrostatic interaction, and van der Waals force), and pore filling. The sorption behavior of organic contaminants to NPs/MPs is not only affected by the properties of the NPs/MPs and the organic contaminants, but also by the solution chemistry, such as the pH, ionic strength, and dissolved organic matter. Full article
(This article belongs to the Special Issue Application of Engineered Nanomaterials for Environmental Remediation and Water Treatment)
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