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<p>A novel and eco-friendly miniature system was developed to treat soil polluted with toxic heavy metals (lead, cadmium, nickel, chromium, and cobalt) using woodlice as a bio-treatment method. This study analyses the ability of these types of arthropods to take up heavy metals and encapsulate them in their faeces, which can then be safely disposed of after collection. The results indicated that woodlice effectively absorbed all tested heavy metals from the polluted soil. In general, the rates of soil treatment of toxic heavy metals were good, although these rates varied from one element to another. Lead, known for its high toxicity, had an absorption rate of 23.63%, i.e., a removal rate of 1.59&#xa0;µg/g. The same was true for manganese. We also found that these arthropods coat their faeces with an organic substance that prevents the re-dispersal of the contaminant into the soil. Thus, this feature can be utilized to collect faeces contaminated with heavy metals and then dispose of them safely. Based on these results, this method is considered an excellent and environmentally friendly treatment method that can be relied upon to reclaim contaminated soil and is considered a useful and safe biotechnology. Agricultural land reclamation is part of Iraq’s national food security strategy and is a unique and essential step in this direction.</p>

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Arthropods as chemical modifiers of metal contaminated soil

  • 期刊论文

  • 发表日期：

    2026年4月13日

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  • Zeinah Abdul Ameir Mohammed,
  • Aqeel Iami,
  • Farqad Abdullah Rashid,
  • Mustafa Al-Furaiji

摘要

A novel and eco-friendly miniature system was developed to treat soil polluted with toxic heavy metals (lead, cadmium, nickel, chromium, and cobalt) using woodlice as a bio-treatment method. This study analyses the ability of these types of arthropods to take up heavy metals and encapsulate them in their faeces, which can then be safely disposed of after collection. The results indicated that woodlice effectively absorbed all tested heavy metals from the polluted soil. In general, the rates of soil treatment of toxic heavy metals were good, although these rates varied from one element to another. Lead, known for its high toxicity, had an absorption rate of 23.63%, i.e., a removal rate of 1.59 µg/g. The same was true for manganese. We also found that these arthropods coat their faeces with an organic substance that prevents the re-dispersal of the contaminant into the soil. Thus, this feature can be utilized to collect faeces contaminated with heavy metals and then dispose of them safely. Based on these results, this method is considered an excellent and environmentally friendly treatment method that can be relied upon to reclaim contaminated soil and is considered a useful and safe biotechnology. Agricultural land reclamation is part of Iraq’s national food security strategy and is a unique and essential step in this direction.