The environmental impact of the life cycle of electrical and electronic equipment (EEE) on soil is a major issue in our modern society. This equipment includes smartphones, computers, televisions, household appliances, lamps, batteries, among others. While these technologies bring many benefits, their production, use and disposal can have significant consequences for the environment, particularly for soil quality.
Pollution from industrial activities upstream of use
The risks caused by raw material extraction
The life cycle of EEE begins with the extraction of the raw materials needed for their manufacture: minerals such as copper, aluminium, lithium, cobalt, as well as rare earths. Open-pit or underground mining methods can lead to risks of soil pollution.
The excavation and displacement of soil during mining disrupt the layers and natural structure of the soil. This can lead to a loss of humus, an organic element essential to soil fertility. The heavy machinery used can compact and compress the earth, which limits its ability to absorb water and nutrients.
In addition, mining often involves polluting chemicals (explosives, solvents, flotation agents) that can seep into the soil and pollute groundwater. Mining residues (tailings) can contain toxic substances causing long-term pollution. The deforestation required for mining can also lead to a decline in biodiversity and a loss of natural habitats.
The consequences of material processing and assembly
Once the materials are extracted, they are processed and assembled to form the components of electronic equipment. The processing of raw materials often requires the use of chemicals (acids, solvents, heavy metals). When poorly managed or improperly disposed of, they can be discharged into soils and contaminate them, which can harm their fertility.
The manufacture of printed circuit boards often involves the integration of corrosive chemicals and metals such as copper, tin, lead and nickel. When they end up in soils, these metals can persist for long periods and cause long-term pollution. Assembly activities can also generate solid waste which, poorly managed, can lead to pollution of the surrounding soils.
End-of-life management and soil pollution
Electronic waste containing hazardous substances (lead, mercury, brominated flame retardants) can contaminate sites when poorly managed and improperly disposed of. Incineration, uncontrolled landfills and informal recycling can release these pollutants into the environment, thereby compromising soil quality and human health.
At end of life, the management of electronic waste is crucial to minimising the impact on soil. Proper recycling and treatment of EEE make it possible to recover valuable materials and reduce the quantity of waste sent to landfill. However, recycling is not yet widespread and many devices still end up in landfills or are exported to developing countries.
What solutions can prevent soil pollution?
After a Life Cycle Assessment (LCA), it is imperative to implement measures at each stage to minimise the impact of the EEE life cycle on soil health.
More sustainable extraction practices must be put in place: restoration of mining sites after operation, waste management techniques to reduce residues and pollutants, and adoption of less destructive extraction methods. Reducing the impact of the EEE life cycle on soil also includes promoting eco-design, implementing strict regulations on the management of electronic waste, improving the energy efficiency of devices, encouraging recycling and reuse, and raising consumer awareness.
Soil pollution in France and the measures in place
In France, soil pollution linked to EEE remains a growing concern, notably due to the accumulation of electronic waste containing harmful materials. The Anti-Waste for a Circular Economy law (AGEC), adopted in 2020, imposes waste-reduction targets and strengthens producer responsibility for ecological design and end-of-life management.
In parallel, EEE recycling channels, such as that of Écosystem, ensure the collection and treatment of electronic waste at dedicated sites. Finally, specific standards and restrictions govern the use of certain chemicals in electronic components, in accordance with the European REACH regulation.
In conclusion, the impact of the EEE life cycle on soil is a significant challenge to address. It is essential to rethink our consumption models, promote sustainable production and waste-management practices, and encourage technological innovation focused on durability.