Potentially Toxic Elements in Soils Affected by Metal Mining and Processing, 2nd Edition

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Environmental Mineralogy and Biogeochemistry".

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 1367

Special Issue Editors


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Guest Editor
Institute of Soil Science and Environmental Protection, Wrocław University of Environmental and Life Sciences, 50-375 Wroclaw, Poland
Interests: soil; mine wastes; tailings; potentially toxic elements; arsenic; remediation; risk assessment; biogeochemistry; phytoavailability; ecotoxicity
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Guest Editor
Department of Environmental Remote Sensing and Soil Science, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University in Poznan, ul. Bogumiła Krygowskiego 10, 61-680 Poznań, Poland
Interests: heavy potentially toxic elements in the environment, their speciation; antimony and arsenic, mobility and phytoavailability; land reclamation; shooting ranges, the use of remote sensing for the quantitative assessment of soil nutrient status and soil contamination
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The production of metals has always been and remains an important constituent in the development of civilization. Mining of metal ores, as well as their processing, which involves various methods of concentration and smelting, belong to those human activities that strongly affect the environment. They usually lead to their considerable enrichment in potentially toxic elements, such as heavy metals and metalloids. The problem of soil pollution at such sites relates both to abandoned historical mines and smelters and to currently operating plants. Although the contemporary metal industry usually uses modern technologies that can significantly reduce the amounts of contaminants released into the environment, potentially toxic metals and metalloids that have accumulated in soils for decades or centuries can still pose a considerable risk to human health and ecosystems. Their transformations can lead to either beneficial or detrimental effects.

This Special Issue of Minerals welcomes works dealing with various problems related to soil contamination in the sites affected by metal ore mining and processing, including weathering of metal(loid)-hosting minerals, biogeochemistry of potentially toxic elements in soils, their release into water and uptake by plants, and assessment of associated environmental risk, as well as the methods of soil remediation.

Prof. Dr. Anna Karczewska
Prof. Dr. Karolina Lewińska
Guest Editors

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Keywords

  • metals
  • metalloids
  • soil
  • contamination
  • mining
  • mine wastes
  • tailings

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Published Papers (1 paper)

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Research

20 pages, 4331 KiB  
Article
Induced Phytomanagement of Multi-Metal Polluted Soil with Conocarpus erectus Supported by Biochar, Lignin, and Citric Acid
by Hafiz Muhammad Tauqeer, Karolina Lewińska, Muhammad Umar, Faisal Mahmood, Tanvir Shahzad, Faiqa Sagheer, Hina Sajid, Iqra Chaudhary and Muhammad Iqbal
Minerals 2024, 14(11), 1149; https://doi.org/10.3390/min14111149 - 13 Nov 2024
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Abstract
Induced heavy metals (HMs) phytoextraction from heavily contaminated soils is challenging, as high HM bioavailability causes phytotoxicity and leaching. This study introduces a novel approach for HM immobilization with biochar (BC) and lignin (LN), and later their controlled mobilization with citric acid (CA) [...] Read more.
Induced heavy metals (HMs) phytoextraction from heavily contaminated soils is challenging, as high HM bioavailability causes phytotoxicity and leaching. This study introduces a novel approach for HM immobilization with biochar (BC) and lignin (LN), and later their controlled mobilization with citric acid (CA) in soil. Conocarpus erectus was grown for 120 days in shooting-range soil (SS) polluted with Pb, Cr, Cd, Ni, and Cu. HM concentrations in parts of the plants, their percentage removal, and leaching from SS were measured. Moreover, plant biochemical parameters such as the contents of chlorophyll a (Chl-a), chlorophyll b (Chl-b), protein, ascorbic acid (AsA), amino acids, and total phenolics, along with biophysical parameters such as relative water content (RWC) and water uptake capacity (WUC), were also inspected. Adding BC, LN, and BC+LN to SS improved biomass, as well as the biophysical and biochemical parameters of plants, while efficiently reducing HM concentrations in plant parts, DTPA extract, and leachates compared to the control (CK). However, the greatest amplifications in plant height (82%), dry weight of root (RDW) (109%), and dry weight of shoot (SDW) (87%), plant health, and soil enzymes were noted with the BC+LN+CA treatment, compared with the CK. Moreover, this treatment resulted in Pb, Cr, Cd, Ni, and Cu removal by 68, 30, 69, 59, and 76% from the SS compared to the CK. Surprisingly, each HM concentration in the leachates with BC+LN+CA was below the critical limits for safer water reuse and agricultural purposes. Initial HM immobilization in HM-polluted soils, followed by their secured mobilization during enhanced phytoextraction, can enhance HM removal and reduce their leaching without compromising plant and soil health. Full article
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