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Forests
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Heavy-Metal Pollution and Remediation of Forest Soil
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Heavy-Metal Pollution and Remediation of Forest Soil

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Forest Soil".

Deadline for manuscript submissions: closed (23 July 2023) | Viewed by 2777

Special Issue Editors

Dr. Lianghua Chen

E-Mail Website
Guest Editor
Institute of Ecology & Forestry, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
Interests: eco-physiological responses of plants to heavy metals; detoxification mechanism of plants to toxins; the role of AMF in phytoremediation; soil contamination; bioaccumulation; remediation
Dr. Tiantian Lin

E-Mail Website
Co-Guest Editor
College of Forestry, Sichuan Agricultural University, No. 211, Huimin Road, Wenjiang District, Chengdu 611130, China
Interests: heavy-metal-mediated plant–insect/pathogen interactions; ecological responses of plants to heavy metals; detoxification mechanism of plants to heavy metals; biological toxicity; bioaccumulation

Special Issue Information

Dear Colleagues,

Heavy metal pollution is one of the most serious environmental problems worldwide and has become a global challenge for food safety, human health, and sustainable socioeconomic development. It is urgent to prevent soils from pollution and rehabilitate soils contaminated by heavy metals, although remediation of soils is confronted with many technical difficulties, and it is also time-consuming and costly. Forests play important roles in purifying environmental pollutants, such as air pollutants. However, relevant studies involving forest soil remediation appear insufficient. Therefore, it is necessary to gather more knowledge about the potential and capacity of heavy metals in forest soils, and mechanisms of forest ecosystems in remediation and restoration, in order to use trees or microorganisms with promising remediation potential, construct appropriate forest stands and develop scientific management techniques to rehabilitate forests soils, and ultimately enhance the resilience and adaptation of forests to heavy metal pollution.

This Special Issue includes but is not limited to following topics:

  • Transformation and transfer processes of heavy metals, and their bioavailabilities in forest soils;
  • Current status and spatial variation of heavy metal pollution, sources, and potential risks of heavy metals in forest ecosystems;
  • Ecotoxicological responses and remediation mechanisms of forest organisms;
  • Biogeochemical cycle of heavy metals in forest ecosystems;
  • Screening of organisms with remediation potential, and genetic improvement of forest trees to enhance phytoremediation capacity;
  • The effect of heavy metal pollution on ecosystem processes, such as interspecific competition;
  • Contamination control and new management strategies or technologies to remove heavy metals from forest.

Dr. Lianghua Chen
Dr. Tiantian Lin
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. Forests 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

  • soil contamination
  • bioaccumulation
  • heavy metals
  • biological toxicity
  • ecological restoration

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Published Papers (2 papers)

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Research

20 pages, 2419 KiB  
Article
Effects of Nitrogen Addition on the Growth and Physiology of Populus deltoides Seedlings under Cd and Mn Pollution
by Xue Wang, Linting Hao, Jiaxuan Mi, Man Yin, Cailan Xing, Xueqin Wan, Fan Zhang, Hanbo Yang, Fang He, Hongling Hu and Lianghua Chen
Forests 2023, 14(9), 1707; https://doi.org/10.3390/f14091707 - 24 Aug 2023
Viewed by 912
Abstract
Both nitrogen (N) deposition and heavy metal pollution are important environmental concerns that threaten ecosystem stability and ecological safety. Limited research has been conducted on the effects of N deposition on the physiological processes and allocation patterns of heavy metals (HMs) in poplars, [...] Read more.
Both nitrogen (N) deposition and heavy metal pollution are important environmental concerns that threaten ecosystem stability and ecological safety. Limited research has been conducted on the effects of N deposition on the physiological processes and allocation patterns of heavy metals (HMs) in poplars, especially under combined pollution. In our study, we used Populus deltoides as a model to investigate the effects of two levels of N addition (LN, 6 g N·m−2·a−1; HN, 12 g N·m−2·a−1) on growth, activities of antioxidant enzymes, profiles of low-molecular-weight organic acids, as well as accumulation and allocation of HMs among different organs and root orders under single Cd (30 mg kg−1) or Mn pollution (168.6 mg kg−1), and their combination. The effects of N addition depended on the dosage effects of N and the types of HMs. The combined pollution did not have more negative effects on overall growth and oxidative damage in the root tips of P. deltoides compared to single Cd or Mn pollution. Both levels of N deposition, especially LN, promoted growth in P. deltoides to varying extents under all HM pollution conditions. However, N addition only mitigated oxidative damage to the fine roots under Cd-containing pollution, which may be attributed to higher levels of low-molecular-weight organic acids such as citric acid and malic acid. In contrast, HN decreased the levels of key organic acids, such as lactic acid and pantothenic acid, potentially exacerbating Mn toxicity under Mn pollution. Both levels of N addition decreased the total amount of Cd accumulated in P. deltoides under Cd pollution alone but increased the accumulation of Cd in combined pollution (especially under LN). However, under Mn-containing pollution, the addition of N increased the accumulation of Mn and its transfer to leaves, potentially aggravating Mn toxicity. Therefore, N deposition, especially under HN, may lead to more severe HM stress for plants in soils polluted by combined Cd and Mn. Full article
(This article belongs to the Special Issue Heavy-Metal Pollution and Remediation of Forest Soil)
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18 pages, 7885 KiB  
Article
An Assessment of the Impact of the Mining Industry on Soil and Plant Contamination by Potentially Toxic Elements in Boreal Forests
by Anna Gololobova and Yana Legostaeva
Forests 2023, 14(8), 1641; https://doi.org/10.3390/f14081641 - 14 Aug 2023
Cited by 3 | Viewed by 1336
Abstract
This study was conducted in the territory of the industrial site of the Udachny Mining and Processing Division (Yakutia, northeast Russia). The objects of study were permafrost soils and two species of shrubs (Betula middendorffii T. and Duschekia fruticose R.). Soil and [...] Read more.
This study was conducted in the territory of the industrial site of the Udachny Mining and Processing Division (Yakutia, northeast Russia). The objects of study were permafrost soils and two species of shrubs (Betula middendorffii T. and Duschekia fruticose R.). Soil and plant samples were analyzed using atomic absorption spectrometry for the presence of PTEs (Pb, Ni, Mn, Cd, Co, Cr, Zn, Cu, and As). The bioaccumulation factor (BAF), frequency of occurrence (Hi), pollution index (PI), and pollution load index (PLI) were calculated. The PI and PLI are calculated for both soil and two plant species for the first time in this study. The results showed that the soils have a high Ni, Cr, Co, As, and Mn content. It has been established that high soil pollution naturally leads to an increase in the concentration of elements in the leaves of shrubs. The soils and vegetation are dominated by elements associated with trap magmatism—Cr, Co, Cu, and dolerite dikes—Mn and Zn. For Betula middendorffii, the PLI was classified as unpolluted to moderately polluted, and Duschekia fruticosa. was classified as unpolluted. The high level of contamination is typical for areas located near industrial sites, such as waste dumps, kimberlite pipes, tailings ponds, and roads. The BAF results confirmed that the leaves of Betula middendorffii are able to accumulate more PTEs and have the highest level of resistance to PTE contamination in mining environments. This analysis showed that the consistent application of the PI, PLI, and BAF indices is very efficient in the ecological and biogeochemical assessment of the situation in industrial development areas. Full article
(This article belongs to the Special Issue Heavy-Metal Pollution and Remediation of Forest Soil)
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