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Water
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Nanocolloids in Water and Human Health
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Nanocolloids in Water and Human Health

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water and One Health".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 7101

Special Issue Editors

Prof. Dr. Qixing Zhou

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Guest Editor
College of Environmental Science and Engineering, Nankai University, Tianjin, China
Interests: environmental geochemistry; ecotoxicology and environmental health; pollution ecology and regional regulation; green advanced materials and ecological remediation
Dr. Shaohu Ouyang

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Guest Editor
College of Environmental Science and Engineering, Nankai University, Tianjin, China
Interests: nanocolloids; ecological effects; metabolic toxicity; nanotoxicology; environmental behavior
Dr. Yang Gao

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Guest Editor
School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha, China
Interests: emerging contaminants; nanomaterials; natural surface waters; environmental behavior; bio-toxicity; microbial diversity; toxicity mechanisms; environmental risks
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanocolloids are a highly dispersed nanoscale multiphase inhomogeneous system in the environment. In water, nanocolloids are generally classified into three main categories, those that are naturally formed in water, those that are artificially synthesized, and those that are transformed from manufactured nanomaterials released into water environment during production, use, and disposal.

What role do nanocolloids in water play in aquatic ecosystems? Are they beneficial or harmful to fishes and other aquatic organisms? Can they carry harmful microorganisms or even viruses in water, causing greater ecological risks and human health issues due to the enhanced diffusion ability of nanocolloids in water? There are large biases and gaps in our understanding of the formation, migration, transformation, and ecological effects of nanocolloids in the water environment and their effects on human health due to the complex matrix of the aqueous environment.

This Special Issue aims to discuss formation processes, environmental behavior, and ecological effects of nanocolloids in water, interactions between nanocolloids and aquatic organisms, and influences on human health, to provide a scientific basis and theoretical support for assessing potential hazards and ecological regulation of nanocolloids in water.

Prof. Dr. Qixing Zhou
Dr. Shaohu Ouyang
Dr. Yang Gao
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. Water 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 2600 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

  • nanocolloids
  • water environment
  • ecological effect
  • environmental behavior
  • microscopic mechanism
  • human health
  • microbial diversity

Published Papers (3 papers)

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Research

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14 pages, 4273 KiB  
Article
Aggregation Kinetics and Mechanism of Humic Acid Reaction with Cs+ and Co2+ Metal Ions Using Batch Techniques
by Liqiang Tan, Yuxiang Wang, Song Wang, Caijin Wu, Dong Li, Yisheng Chen and Haocheng Wang
Water 2022, 14(17), 2619; https://doi.org/10.3390/w14172619 - 25 Aug 2022
Cited by 1 | Viewed by 1508
Abstract
Humic substances have a potential role in the fate and transport of toxic metal ions in the environment due to their colloidal characteristics and abundant surface functional groups. Batch techniques (DLS, EPM, FT-IR and fluorescence EEM) were developed to assess the aggregation mechanisms [...] Read more.
Humic substances have a potential role in the fate and transport of toxic metal ions in the environment due to their colloidal characteristics and abundant surface functional groups. Batch techniques (DLS, EPM, FT-IR and fluorescence EEM) were developed to assess the aggregation mechanisms of humic acid (HA) reacting with Cs+ or Co2+ electrolyte ions in this work. The kinetic experimental results indicated that a much lower Co2+ ion concentration (0.03–1.50 mmol/L) induced rapid aggregation of HA compared to that of Cs+ (3.0–15 mmol/L), and the divalent Co2+ ion was far more effective in enhancing HA aggregation than monovalent Cs+. The aggregation kinetics of HA were also found to be pH-dependent, and a much lower pH condition (pH 5.0) caused more rapid aggregation (the largest hydrodynamic diameter of ~3000 nm) compared to those at pH 7.0 (the largest hydrodynamic diameter of ~2000 nm). Positively charged metal ions in the solution can lower the electrostatic repulsive force between HA molecules through charge neutralization, thus leading to the rapid aggregation of HA aggregates. Furthermore, the carboxylic and phenolic groups on the HA surface were also involved in the aggregation reaction to form inner complexes and accelerate the aggregation process. Full article
(This article belongs to the Special Issue Nanocolloids in Water and Human Health)
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Review

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24 pages, 8104 KiB  
Review
An Overview of Light-Mediated Impact of Graphene Oxide on Algae: Photo-Transform, Toxicity and Mechanism
by Yang Gao, Li Chen, Shenghua Cheng, Ling Zhu, Lijuan Liu, Peihuan Wen, Letao Zhou, Wenjing Xue, Songhua Lu, Wei Zhang, Lean Zhou and Shiquan Sun
Water 2022, 14(19), 2997; https://doi.org/10.3390/w14192997 - 23 Sep 2022
Cited by 6 | Viewed by 2093
Abstract
Due to the unique chemical and physical properties, graphene-based nanomaterials are increasingly being introduced into various scientific fields. They all play very important roles in different fields and are widely used. Graphene oxide (GO) is one of the most popular and representative carbon [...] Read more.
Due to the unique chemical and physical properties, graphene-based nanomaterials are increasingly being introduced into various scientific fields. They all play very important roles in different fields and are widely used. Graphene oxide (GO) is one of the most popular and representative carbon nanomaterials; scientists have great research interest in it. When carbon nanomaterials such as GO are released into the aquatic environment, their physicochemical properties will be influenced by natural light, resulting in the potential change in toxic effects on aquatic organisms. Algae, as a typical aquatic organism, is extensively regarded as a model microorganism to assess the biotoxicity of nanomaterials. In this review, we overview the light-mediated impact of GO on algae. We summarize the photo-transformation of GO under different illumination conditions and the effect of illumination on the physicochemical properties of GO. Then, we combined metabolomics, genotoxicity, and proteomics with standard toxicity assays (cell division, membrane permeability, oxidative stress, photosynthesis, cellular ultrastructure, and so on) to compare native and environmentally transformed GO induction toxicological mechanisms. By correlating lights, physicochemical properties, and biotoxicity, this review is valuable for environmental fate assessments on graphene-based nanoparticles, providing a theoretical basis and support for evaluating the potential ecological health and environmental risks of graphene-based nanoparticles in real natural water environments. Full article
(This article belongs to the Special Issue Nanocolloids in Water and Human Health)
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17 pages, 2005 KiB  
Review
Ecotoxicity of Natural Nanocolloids in Aquatic Environment
by Shaohu Ouyang, Yuhao Li, Tong Zheng, Kangying Wu, Xin Wang and Qixing Zhou
Water 2022, 14(19), 2971; https://doi.org/10.3390/w14192971 - 22 Sep 2022
Cited by 4 | Viewed by 3059
Abstract
Nanocolloids (Ncs) are highly dispersed mixtures of nanoscale (1–100 nm) heterogeneous systems, which are ubiquitous in aquatic environments. Ncs are considered a vital pollutant carrier due to their special surface properties and unique hydrodynamic characteristics. They play an essential role in the process [...] Read more.
Nanocolloids (Ncs) are highly dispersed mixtures of nanoscale (1–100 nm) heterogeneous systems, which are ubiquitous in aquatic environments. Ncs are considered a vital pollutant carrier due to their special surface properties and unique hydrodynamic characteristics. They play an essential role in the process of promoting pollutant migration and transformation. In recent years, with the increase in chemicals in the environment and the complexity of environmental pollution, the health threats of Ncs in ecological systems are arousing great concerning. Therefore, recent work to characterize the ecotoxicity of Ncs has focused on the potential environmental health implications, including exploration of toxicity to aquatic organisms from a wide range of the ecosystem food webs. Herein, we summarize the formation, distribution, and characterization of natural Ncs in the marine environments. Moreover, we highlight the adverse impacts of Ncs on representatives of various trophic levels aquatic organisms (e.g., algae, bacteria, invertebrates, and fish). The mechanisms of Ncs ecotoxicity at the cellular level are reviewed, and the remaining unclear points on toxic tools such as oxidative damage and metabolic disorder are presented. We also discuss the research challenges and future developments within the field of ecotoxicity. This study will bridge our knowledge gap on the ecotoxicity of Ncs. Full article
(This article belongs to the Special Issue Nanocolloids in Water and Human Health)
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