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Human Exposure to Emerging Contaminants Associated with E-waste Dismantling: Environmental...
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Human Exposure to Emerging Contaminants Associated with E-waste Dismantling: Environmental Processes, Human Exposure and Environmental Management

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

Deadline for manuscript submissions: 10 January 2025 | Viewed by 5245

Special Issue Editors

Prof. Dr. Tao Zhang

E-Mail Website
Guest Editor
School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
Interests: emerging contaminants; human exposure; environmental processes; food chains; metabolism; mechanism of toxicity
Special Issues, Collections and Topics in MDPI journals
Dr. Yanhong Zeng

E-Mail Website
Guest Editor
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
Interests: flame retardants; PCBs; compound specific isotope analysis; bioaccumulation; biotransformation
Dr. Zhi-peng Cheng

E-Mail Website
Guest Editor
College of Environmental Science and Engineering, Nankai University, Tianjin, China
Interests: environmental fate; human exposure; biotransformation; toxicity; risk assessment
Dr. Bo Zhang

E-Mail Website
Guest Editor
School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
Interests: environmental exposure; emerging contaminant; human biomonitoring; human health

Special Issue Information

Dear Colleagues,

Emerging contaminants have gained considerable attention from environmental chemists and toxicologists because of their prevalence in the environment and potential adverse effects on health. Furthermore, e-waste can be defined as any “discarded electrical or electronic devices”; it continues to be generated at an alarming rate since the past decade. Although E-waste dismantling recovers valuable materials, hazardous contaminants originating from such processes also contaminate ecosystems, further cause high exposure levels, and lead to multiple adverse health outcomes to workers or residents living in the vicinity of disposal areas. Currently, driven by a series of laws and regulations of the e-waste recycling market, primitive dismantling of e-waste at disposal sites has declined significantly as a consequence. However, rapid innovation in the electronics industry has resulted in a fast-growing surge of emerging contaminants. Yet, there is still enough room for research in environmental risk assessment, management, and remediation actions of contaminants associated with e-waste, as well as the magnitude of human exposure.

This Special Issue of Toxics calls for submissions of innovative and original propositions for articles (including research and review articles) about current problems regarding emerging contaminants originated from e-waste dismantling activities. We are pleased to invite original works that may contribute to (1) methodology to characterize emerging contaminants; (2) environmental distribution, bioaccumulation, transfer, and ecological impacts; (3) human exposure, epidemiology, and toxicological impacts; and (4) strategy for their management.

Prof. Dr. Tao Zhang
Dr. Yanhong Zeng
Dr. Zhi-peng Cheng
Dr. Bo Zhang
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

  • E-waste
  • emerging contaminants
  • organic pollutants
  • environmental behaviors
  • bioaccumulation
  • human exposure
  • health risks
  • biotransformation
  • environmental management

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Published Papers (4 papers)

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17 pages, 7943 KiB  
Article
Multi-Walled Carbon Nanotubes Accelerate Leukaemia Development in a Mouse Model
by Qingqing Wang, Jingdan Han, Mujia Wei, Huikai Miao, Min Zhang, Biao Wu, Yao Chen, Yanwen Zheng, Robert Peter Gale and Bin Yin
Toxics 2024, 12(9), 646; https://doi.org/10.3390/toxics12090646 - 2 Sep 2024
Viewed by 1143 | Correction
Abstract
Inflammation is associated with an increased risk of developing various cancers in both animals and humans, primarily solid tumors but also myeloproliferative neoplasms (MPNs), myelodysplastic syndromes (MDS), and acute myeloid leukemia (AML). Multi-walled carbon nanotubes (MWCNTs), a type of carbon nanotubes (CNTs) increasingly [...] Read more.
Inflammation is associated with an increased risk of developing various cancers in both animals and humans, primarily solid tumors but also myeloproliferative neoplasms (MPNs), myelodysplastic syndromes (MDS), and acute myeloid leukemia (AML). Multi-walled carbon nanotubes (MWCNTs), a type of carbon nanotubes (CNTs) increasingly used in medical research and other fields, are leading to a rising human exposure. Our study demonstrated that exposing mice to MWCNTs accelerated the progression of spontaneous MOL4070LTR virus-induced leukemia. Additionally, similar exposures elevated pro-inflammatory cytokines such as interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF)-α and induced reactive oxygen species (ROS) in a murine macrophage cell line. These effects were significantly reduced in immunodeficient mice and when mice were treated with methoxypolyethylene glycol amine (PEG)-modified MWCNTs. These findings underscore the necessity of evaluating the safety of MWCNTs, particularly for those with hematologic cancers. Full article
(This article belongs to the Special Issue Human Exposure to Emerging Contaminants Associated with E-waste Dismantling: Environmental Processes, Human Exposure and Environmental Management)
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11 pages, 1961 KiB  
Article
A Pilot Study on Bioaccumulation and Tissue Distribution of Mercury in Barn Swallow (Hirundo rustica)
by Li Tian, Yujing Zhu, Ruiming Yu and Xiaobo Zheng
Toxics 2024, 12(3), 206; https://doi.org/10.3390/toxics12030206 - 8 Mar 2024
Cited by 1 | Viewed by 1583
Abstract
Although extensive research has been carried out on the occurrence of mercury (Hg) in biota, bioaccumulation and tissue distribution of Hg in songbirds have not been well characterized. In the present study, Hg was investigated in insects and barn swallows (Hirundo rustica [...] Read more.
Although extensive research has been carried out on the occurrence of mercury (Hg) in biota, bioaccumulation and tissue distribution of Hg in songbirds have not been well characterized. In the present study, Hg was investigated in insects and barn swallows (Hirundo rustica) to explore the bioaccumulation characteristics of Hg. Hg in swallow feathers and tissues including muscle, liver, and bone was investigated to determine the tissue distribution of Hg. The concentrations of Hg were 1.39 ± 1.01 μg/g, 0.33 ± 0.09 μg/g, 0.47 ± 0.10 μg/g, and 0.23 ± 0.09 μg/g in feather, muscle, liver, and bone samples, respectively. The trophic magnification factor of Hg in swallows and insects was higher than 1. However, the Hg concentrations in swallow feathers were not significantly correlated with stable isotope values of carbon or nitrogen, which implies the complex food sources and exposure processes of Hg for swallows. Feathers had significantly higher concentrations of Hg than liver, muscle, and bone samples (p < 0.01 for all comparisons). Feather, muscle, bone, and other organs had fractions of 64.4 ± 11.9%, 6.07 ± 2.06%, 20.0 ± 8.19%, and 9.56 ± 2.96% in total body burden of Hg in swallows. Hg in feathers contributed more than half of Hg in the whole body for most swallow individuals. Swallows may efficiently eliminate Hg by molting, and the excretion flux of Hg and other contaminants via molting deserves more investigation. Full article
(This article belongs to the Special Issue Human Exposure to Emerging Contaminants Associated with E-waste Dismantling: Environmental Processes, Human Exposure and Environmental Management)
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12 pages, 1483 KiB  
Article
Historical Occurrence and Composition of Novel Brominated Flame Retardants and Dechlorane Plus in Sediments from an Electronic Waste Recycling Site in South China
by Chenchen Huang, Yanhong Zeng, Yin-E Liu, Yanting Zhang, Jian Guo, Xiaojun Luo and Bixian Mai
Toxics 2024, 12(1), 84; https://doi.org/10.3390/toxics12010084 - 18 Jan 2024
Cited by 2 | Viewed by 1512
Abstract
Novel brominated flame retardants (NBFRs) and dechlorane plus (DP) have been widely used as alternatives to traditional BFRs. However, little is known about the temporal trends of NBFR and DP pollution in e-waste recycling sites. In the current study, three composite sediment cores [...] Read more.
Novel brominated flame retardants (NBFRs) and dechlorane plus (DP) have been widely used as alternatives to traditional BFRs. However, little is known about the temporal trends of NBFR and DP pollution in e-waste recycling sites. In the current study, three composite sediment cores were collected from an e-waste-polluted pond located in a typical e-waste recycling site in South China to investigate the historical occurrence and composition of NBFRs and DP. The NBFRs and DP were detected in all layers of the sediment cores with concentration ranges of 5.71~180,895 and 4.95~109,847 ng/g dw, respectively. Except for 2,3,5,6-tetrabromo-p-xylene (pTBX) and 2,3,4,5,6-pentabromoethylbenzene (PBEB), all the NBFR compounds and DP showed a clear increasing trend from the bottom to top layers. These results implied the long-term and severe contamination of NBFRs and DP. Decabromodiphenyl ethane (DBDPE) was the most abundant NBFR with the contribution proportions of 58 ± 15%, 73 ± 15%, and 71 ± 18% in three sediment cores, followed by 1,2-bis(2,4,6-tribromophenoxy) ethane (BTBPE) and pentabromobenzene (HBB). The ratios of BTBPE/Octa-BDEs and DBDPE/Deca-BDEs varied from 0.12 to 60 and from 0.03 to 0.49, respectively, which had no clear increase trends with a decrease in sediment depth. As for DP, the fanti values (the concentration ratios of anti-DP to the sum of anti-DP and syn-DP) in sediment cores ranged from 0.41 to 0.83, almost falling in the range of those in DP technical products, suggesting that DP degradation did not occur in sediment cores. The environmental burdens of DBDPE, BTBPE, HBB, PBT, PBEB, pTBX, and DP were estimated to be 34.0, 5.67, 10.1, 0.02, 0.02, 0.01, and 34.8 kg, respectively. This work provides the first insight into the historical contamination status of NBFRs and DP in the sediments of an e-waste recycling site. Full article
(This article belongs to the Special Issue Human Exposure to Emerging Contaminants Associated with E-waste Dismantling: Environmental Processes, Human Exposure and Environmental Management)
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1 pages, 138 KiB  
Correction
Correction: Wang et al. Multi-Walled Carbon Nanotubes Accelerate Leukaemia Development in a Mouse Model. Toxics 2024, 12, 646
by Qingqing Wang, Jingdan Han, Mujia Wei, Huikai Miao, Min Zhang, Biao Wu, Yao Chen, Yanwen Zheng, Robert Peter Gale and Bin Yin
Toxics 2024, 12(11), 823; https://doi.org/10.3390/toxics12110823 - 18 Nov 2024
Viewed by 197
Abstract
At the request of the authors, Haiyan Xu has been removed from the original publication [...] Full article
(This article belongs to the Special Issue Human Exposure to Emerging Contaminants Associated with E-waste Dismantling: Environmental Processes, Human Exposure and Environmental Management)
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