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Toxics
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Pollution of Legacy and Emerging Contaminants in Developing Countries: Occurrence,...
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Pollution of Legacy and Emerging Contaminants in Developing Countries: Occurrence, Effects, Risk Assessment, and Remediation

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Emerging Contaminants".

Deadline for manuscript submissions: closed (30 December 2023) | Viewed by 4676

Special Issue Editors

Prof. Dr. Jiahua Guo

E-Mail Website
Guest Editor
College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China
Interests: aquatic toxicology; microbial ecotoxicology; multi-omics; DNA metabarcoding; PPCPs; POPs; spatiotemporal distribution; risk assessment
Dr. Jiezhang Mo

E-Mail Website
Guest Editor
Department of Biology, College of Science, Shantou University, Shantou 515063, China
Interests: ecotoxicology; POPs; PPCPs; environmental risk assessment; toxicogenomics; model organisms
Dr. Wen Sun

E-Mail Website
Guest Editor
School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi 435003, China
Interests: metabolomics; POPs; monitoring techniques; environmental risk assessment

Special Issue Information

Dear Colleagues,

Thousands of chemicals, ranging from personal care products to industrial-scale application, have been on the market since industrialization. While these substances have benefited humankind, chemical pollution has become an emerging environmental challenge facing the world today, especially developing countries with less well-established waste and wastewater related infrastructure, as well as chemical use legislation and regulation. The occurrence of chemical residues in the environment can cause severe damage to environmental and human health.

The detection of a number of legacy and emerging pollutants, including persistent organic pollutants (POPs), pharmaceuticals and personal care products (PPCPs), nanoparticles, microplastics, heavy metals, etc., has been widely reported in Western countries. However, their occurrence, effects, and remediation approach available for developing countries are far less understood. A comprehensive evaluation of pollution of legacy and emerging contaminants in developing countries is a prerequisite for effective control. This Special Issue includes but is not limited to their occurrence, analytical method development, aquatic and terrestrial ecotoxicology, environmental modeling, risk assessment, and remediation technologies.

Prof. Dr. Jiahua Guo
Dr. Jiezhang Mo
Dr. Wen Sun
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. Toxics 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 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

  • POPs
  • PPCPs
  • heavy metals
  • microplastics
  • environmental exposure
  • ecotoxicity
  • aquatic toxicology
  • source apportionment
  • risk assessment
  • remediation

Published Papers (2 papers)

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Research

17 pages, 3476 KiB  
Article
Comparative Metagenomic and Metatranscriptomic Analyses Reveal the Response of Black Soldier Fly (Hermetia illucens) Larvae Intestinal Microbes and Reduction Mechanisms to High Concentrations of Tetracycline
by Yaxin Pei, Mengxiao Sun, Jiran Zhang, Aojie Lei, Hongge Chen, Xiangtao Kang, Hongyuhang Ni and Sen Yang
Toxics 2023, 11(7), 611; https://doi.org/10.3390/toxics11070611 - 13 Jul 2023
Cited by 2 | Viewed by 1419
Abstract
Black soldier fly (Hermetia illucens L) larvae (BSFL) possess remarkable antibiotic degradation abilities due to their robust intestinal microbiota. However, the response mechanism of BSFL intestinal microbes to the high concentration of antibiotic stress remains unclear. In this study, we investigated [...] Read more.
Black soldier fly (Hermetia illucens L) larvae (BSFL) possess remarkable antibiotic degradation abilities due to their robust intestinal microbiota. However, the response mechanism of BSFL intestinal microbes to the high concentration of antibiotic stress remains unclear. In this study, we investigated the shift in BSFL gut microbiome and the functional genes that respond to 1250 mg/kg of tetracycline via metagenomic and metatranscriptomic analysis, respectively. The bio-physiological phenotypes showed that the survival rate of BSFL was not affected by tetracycline, while the biomass and substrate consumption of BSFL was slightly reduced. Natural BSFL achieved a 20% higher tetracycline degradation rate than the germ-free BSFL after 8 days of rearing. Metagenomic and metatranscriptomic sequencing results revealed the differences between the entire and active microbiome. Metatranscriptomic analysis indicated that Enterococcus, Vagococcus, Providencia, and Paenalcaligenes were the active genera that responded to tetracycline. Furthermore, based on the active functional genes that responded to tetracycline pressure, the response mechanisms of BSFL intestinal microbes were speculated as follows: the Tet family that mediates the expression of efflux pumps expel tetracycline out of the microbes, while tetM and tetW release it from the ribosome. Eventually, tetracycline was degraded by deacetylases and novel enzymes. Overall, this study provides novel insights about the active intestinal microbes and their functional genes in insects responding to the high concentration of antibiotics. Full article
(This article belongs to the Special Issue Pollution of Legacy and Emerging Contaminants in Developing Countries: Occurrence, Effects, Risk Assessment, and Remediation)
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11 pages, 1408 KiB  
Article
Assessing the Impact of Microplastic Filaments Contaminated with PAHs on Mytilus coruscus Larvae through Surface Contact
by Jiji Li, Ji Huang, Yingying Ye, Jiayin Lü, Shuai Mao, Jie Bai, Pengzhi Qi, Baoying Guo, Chengkai Qu and Hongchen Jiang
Toxics 2023, 11(7), 554; https://doi.org/10.3390/toxics11070554 - 24 Jun 2023
Viewed by 796
Abstract
In recent years, microplastics have been of great concern in environmental and health research. In field surgeries and laboratory investigations, research interests were focused on the retention of microplastics inside of animals by ingestion and the series of negative effects after that. However, [...] Read more.
In recent years, microplastics have been of great concern in environmental and health research. In field surgeries and laboratory investigations, research interests were focused on the retention of microplastics inside of animals by ingestion and the series of negative effects after that. However, such large plastic debris and filaments are hardly eaten by small animals, like zooplankton, planktonic larvae, etc. In this study, the surface contact between plastic filaments contaminated with polycyclic aromatic hydrocarbons (PAHs) and mussel pediveliger larvae has been investigated to figure out the effects of “non-digestive tract route of exposure” on subject animals. In a 1600 mL artificial seawater medium, high mortalities of mussel larvae were recorded after being exposed to two PAHs-contaminated (benzo[α]pyrene (BaP) and phenanthrene (Phe)) filaments for 5 days, 68.63% for BaP and 56.45% for Phe on average. We suggest that the surface contact was the dominant pathway to transfer PAHs from contaminated filaments to larvae and that the risk of contaminated plastic ropes transferring hydrophobic organic compounds (HOCs) to larvae in mussel aquaculture should be taken seriously. Full article
(This article belongs to the Special Issue Pollution of Legacy and Emerging Contaminants in Developing Countries: Occurrence, Effects, Risk Assessment, and Remediation)
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