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<p>The contamination of soil and the atmosphere by trace metals and CO<sub>2</sub> emissions from landfill leachate poses significant threats to human health and the agroecological system. This research aims to assess the efficacy of coagulation and photocatalysis using titanium dioxide in mitigating the adverse impacts of landfill leachate, particularly in the case of leachate leakage. The study investigates the composition of leachate, analyzes physicochemical treatment processes, and evaluates their effectiveness in reducing CO<sub>2</sub> emissions and the risk of soil pollution. Results indicate a significant reduction in CO<sub>2</sub> emissions and contamination factors for trace metals, such as Ni<sup>2+</sup> and Cd<sup>2+</sup>, especially following photocatalytic treatment. For instance, after a 10-day incubation period, initial leachate exhibited a high CO<sub>2</sub> concentration of 1209&#xa0;mg/100&#xa0;ml, whereas treatment through photocatalysis remarkably decreased it to 291&#xa0;mg/100&#xa0;ml by the end of the incubation. This research contributes valuable insights into innovative strategies for managing landfill leachate, offering a potential solution to minimize the negative environmental impacts associated with leachate leakage.</p> Graphical abstract <p></p>

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Mitigating toxic trace metals contamination and CO2 emissions in soils and atmosphere through leachate treatment with coagulation and photocatalysis processes

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Cherni Yasmin,
  • Melki Samira,
  • Louati Zeineb,
  • Hechmi Sarra,
  • Guedari Moncef,
  • Trabelsi Ismail,
  • Wahab Mohamed Ali

摘要

The contamination of soil and the atmosphere by trace metals and CO2 emissions from landfill leachate poses significant threats to human health and the agroecological system. This research aims to assess the efficacy of coagulation and photocatalysis using titanium dioxide in mitigating the adverse impacts of landfill leachate, particularly in the case of leachate leakage. The study investigates the composition of leachate, analyzes physicochemical treatment processes, and evaluates their effectiveness in reducing CO2 emissions and the risk of soil pollution. Results indicate a significant reduction in CO2 emissions and contamination factors for trace metals, such as Ni2+ and Cd2+, especially following photocatalytic treatment. For instance, after a 10-day incubation period, initial leachate exhibited a high CO2 concentration of 1209 mg/100 ml, whereas treatment through photocatalysis remarkably decreased it to 291 mg/100 ml by the end of the incubation. This research contributes valuable insights into innovative strategies for managing landfill leachate, offering a potential solution to minimize the negative environmental impacts associated with leachate leakage.

Graphical abstract