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Water
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Soil Erosion and Contaminant Management in Watersheds
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Soil Erosion and Contaminant Management in Watersheds

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

Deadline for manuscript submissions: 25 November 2024 | Viewed by 1001

Special Issue Editors

Prof. Dr. Jun Xiao

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Guest Editor
Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
Interests: water pollution; hydrochemistry; chemical weathering; heavy metal; Isotope geochemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Zhiqiang Zhu

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Guest Editor
College of Tropical Crops, Hainan University, Haikou 570228, China
Interests: environmental remediation; heavy metal; phytoremediation; bioavailability; microbe
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jingfu Wang

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Guest Editor
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
Interests: nitrogen; phosphorus; organic matter; sediment; lake; reservoir
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Peng Shi

E-Mail Website
Guest Editor
Department of Hydrology and Water Resources, Xi’an University of Technology, Xi’an 710048, China
Interests: soil erosion; non-point pollution; sediment; soil and water conservation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Soil erosion and non-point source pollution pose significant threats to surface water quality in many areas with concentrated rainfall, exacerbating global land degradation and threatening food security and the supply of high-quality water. Soil erosion and contaminant management are the hot issues of watershed protection and governance, especially the study of biogeochemical processes and the dynamics of nitrogen, phosphorus, organic matter, and heavy metals. This Special Issue focuses on the study of soil erosion and contaminant management dynamics, including case studies and methodological studies, including new methods related to and advances in nutrient morphology and processes, water–soil/sediment–nutrients–heavy metals transport interaction mechanisms, and model and process simulations. The purpose of this Special Issue is to provide a communication platform for scholars engaged in the study of the geochemical dynamics of water–soil/sediment–nutrients–pollutants in varied watersheds.

Prof. Dr. Jun Xiao
Dr. Zhiqiang Zhu
Prof. Dr. Jingfu Wang
Prof. Dr. Peng Shi
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

  • soil erosion
  • nutrient
  • heavy metal
  • pollutants
  • watersheds

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Published Papers (1 paper)

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Research

13 pages, 8213 KiB  
Article
The Recycling Characteristics of Different Silicon Forms and Biogenic Silicon in the Surface Sediments of Dianchi Lake, Southwest China
by Yong Liu, Jv Liu, Guoli Xu, Jingfu Wang, Kai Xu, Zuxue Jin and Guojia Huang
Water 2024, 16(13), 1824; https://doi.org/10.3390/w16131824 - 26 Jun 2024
Viewed by 817
Abstract
Silicon (Si) is one of the main biogenic elements in the aquatic ecosystem of lakes, significantly affecting the primary productivity of lakes. Lake sediment is an important sink of Si, which exists in different Si forms and will be released and participate in [...] Read more.
Silicon (Si) is one of the main biogenic elements in the aquatic ecosystem of lakes, significantly affecting the primary productivity of lakes. Lake sediment is an important sink of Si, which exists in different Si forms and will be released and participate in the recycling of Si when the sediment environment changes. Compared to carbon (C), nitrogen (N) and phosphorus (P), the understanding of different Si forms in sediments and their biogeochemical cycling is currently insufficient. Dianchi Lake, a typical eutrophic lake in southwest China, was selected as an example, and the contents of different Si forms and biogenic silicon (BSi), as well as their correlations with total organic carbon (TOC), total nitrogen (TN), and chlorophyll a in the surface sediments, were systematically investigated to explore Si’s recycling characteristics. The results showed that the coupling relationship of the four different Si forms in the surface sediments of Dianchi Lake was poor (p > 0.05), indicating that their sources were relatively independent. Moreover, their formation may be greatly influenced by the adsorption, fixation and redistribution of dissolved silicon by different lake substances. The contents of different Si forms in the surface sediments of Dianchi Lake were ranked as iron-manganese-oxide-bonded silicon (IMOF-Si) > organic sulfide-bonded silicon (OSF-Si) > ion-exchangeable silicon (IEF-Si) > carbonate-bound silicon (CF-Si). In particular, the contents of IMOF-Si and OSF-Si reached 2983.7~3434.7 mg/kg and 1067.6~1324.3 mg/kg, respectively, suggesting that the release and recycling of Si in surface sediments may be more sensitive to changes in redox conditions at the sediment–water interface, which become the main pathway for Si recycling, and the slow degradation of organic matter rich in OSF-Si may lead to long-term and continuous endogenous Si recycling. The low proportion (0.3~0.6%) and spatial differences of biogenic silicon (BSi) in the surface sediments of Dianchi Lake, as well as the poor correlation between BSi and TOC, TN, and chlorophyll a, indicated that the primary productivity of Dianchi Lake was still dominated by cyanobacteria and other algal blooms, while the relative abundance of siliceous organisms such as diatoms was low and closer to the central area of Dianchi Lake. Additionally, BSi may have a faster release capability relative to TOC and may participate in Si recycling. Full article
(This article belongs to the Special Issue Soil Erosion and Contaminant Management in Watersheds)
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