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Research and Methodology on New Contaminants in Water and Soil
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Research and Methodology on New Contaminants in Water and Soil

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

Deadline for manuscript submissions: closed (31 August 2024) | Viewed by 2162

Special Issue Editors

Prof. Dr. Xiangliang Pan

E-Mail Website
Guest Editor
Institute of Environment, Zhejiang University of Technology, Hangzhou, China
Interests: emerging pollutants; remediation; environmental monitoring
Dr. Chunnuan Deng

E-Mail Website
Guest Editor
Faculty of Geography, Yunnan Normal University, Kunming, China
Interests: environmental pollutants; microplastics pollution

Special Issue Information

Dear Colleagues,

New contaminants, such as micro- and nanoplastics, POPs, PPCPs, and PFASs, have of late increasingly been attracting global attention from academic circles and governments because of their potential ecological and human health impacts. To date, their environmental behavior and ecotoxicological effects have not been well clarified and corresponding methodologies for the investigation thereof are not yet well developed. All of these aspects need urgently to be explored. This Special Issue focuses on the transport, transformation, and risks of new contaminants in the water, soil, and air environments, as well as the relevant methodologies. This Special Issue seeks, therefore, to contribute significantly to the exploration of the poorly understood field of new contaminants and to provide important bases underpinning the decision-making by the relevant authorities.

Prof. Dr. Xiangliang Pan
Dr. Chunnuan Deng
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

  • emerging contaminants
  • nanoplastics
  • health risk
  • new methodology

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

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Research

13 pages, 2790 KiB  
Article
The Impact of Induced Industrial and Urban Toxic Elements on Sediment Quality
by Nehemiah Mukwevho, Napo Ntsasa, Andile Mkhohlakali, Mothepane Happy Mabowa, Luke Chimuka, James Tshilongo and Mokgehle Refiloe Letsoalo
Water 2024, 16(17), 2485; https://doi.org/10.3390/w16172485 - 1 Sep 2024
Viewed by 821
Abstract
Abstract: The increasing population has subjected rivers and streams to high levels of both industrial and domestic pollution. Significant environmental challenges have been brought about by their effects, particularly with regard to biota, ecosystem processes, soil quality, and groundwater pollution. This study examined [...] Read more.
Abstract: The increasing population has subjected rivers and streams to high levels of both industrial and domestic pollution. Significant environmental challenges have been brought about by their effects, particularly with regard to biota, ecosystem processes, soil quality, and groundwater pollution. This study examined the effects of human activity by applying pollution index models to evaluate the input of toxic elements in river sediments. Prior to sediment quality analysis, the total amount of arsenic (As), lead (Pb), cadmium (Cd), mercury (Hg), thorium (Th), and uranium (U) was determined in the concentration range of 1.09–10.0 mg/kg, 8.53–475 mg/kg, 0.12–0.16 mg/kg, 4.85–77.5 mg/kg, 3.14–5.9 mg/kg and 0.93–2.86 mg/kg, respectively. The enrichment factor, contamination factor, pollution load index, and geo-accumulation index revealed alarmingly high levels of Pb and Hg contamination at some sampling points, which are related to possible human input, ranging from severe enrichment to considerable contamination. The low ranges of pollution indices of some toxic elements suggest enrichment through the natural weathering process and atmospheric deposition. The Pearson correlation coefficient revealed a significant correlation between Pb-Fe and As-Fe, suggesting the possibility of acid mine contamination. Continual monitoring of river sediment is essential to minimize the impact of toxic elements to sustain sediment health and quality. Full article
(This article belongs to the Special Issue Research and Methodology on New Contaminants in Water and Soil)
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12 pages, 47347 KiB  
Article
Ecotoxicity of 2,4-Dichlorophenol to Microsorium pteropus by High Spatial Resolution Mapping of Stoma Oxygen Emission
by Ning Zhong and Daoyong Zhang
Water 2024, 16(8), 1146; https://doi.org/10.3390/w16081146 - 18 Apr 2024
Viewed by 1000
Abstract
The toxicity of emerging organic pollutants to photosystems of aquatic plants is still not well clarified. This study aimed to develop a novel ecotoxicological experimental protocol based on nanoscale electrochemical mapping of photosynthetic oxygen evolution of aquatic plants by scanning electrochemical microscopy (SECM). [...] Read more.
The toxicity of emerging organic pollutants to photosystems of aquatic plants is still not well clarified. This study aimed to develop a novel ecotoxicological experimental protocol based on nanoscale electrochemical mapping of photosynthetic oxygen evolution of aquatic plants by scanning electrochemical microscopy (SECM). The protocol was also checked by confocal laser scanning microscopy (CLSM), the traditional Clark oxygen electrode method, and the chlorophyll fluorescence technique. The typical persistent organic pollutant 2,4-dichlorophenol (2,4-DCP) in a water environment and the common aquatic Microsorium pteropus (M. pteropus) were chosen as the model organic pollutant and tested plant, respectively. It was found that the SECM method could discriminate the responses of stoma micromorphology and spatial pattens of photosynthetic oxygen evolution on single stoma well. The shape of stoma blurred with increasing 2,4-DCP concentration, which was in good agreement with the CLSM images. The dose–response curves and IC50 values obtained from the SECM data were verified by the data measured by the traditional Clark oxygen electrode method and chlorophyll fluorescence test. The IC50 value of single-stoma oxygen emission of plant leaves exposed for 24 h, which was derived from the SECM current data (32,535 μg L−1), was close to those calculated from the maximum photosynthetic efficiency (Fv/Fm) measured by the chlorophyll fluorescence test (33,963 μg L−1) and the Clark oxygen electrode method photosynthetic oxygen evolution rate (32,375 μg L−1). The 72 h and 96 h 2,4-DCP exposure data further confirmed the reliability of the nanoscale stoma oxygen emission mapping methodology for ecotoxicological assessment. In this protocol, the procedures for how to collect effective electrochemical data and how to extract useful information from the single-stoma oxygen emission pattern were well established. This study showed that SECM is a feasible and reliable ecotoxicological tool for evaluation of toxicity of organic pollutants to higher plants with a unique nanoscale visualization advantage over the conventional methods. Full article
(This article belongs to the Special Issue Research and Methodology on New Contaminants in Water and Soil)
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