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Environmentally friendly composite isolation and ecological restoration technology
Publication date:
30 Jan,2026
Non-ferrous metal mine oxidized ore waste rock dumps, due to their poor soil, extreme pH levels, and excessive heavy metal content, have become major sources of acidic mine water. The acidic mine water generated by the interaction of sulfide-containing ores with water, atmosphere, and microorganisms in the surface environment carries high concentrations of heavy metals, severely damaging the surrounding ecosystem. Traditional remediation technologies are either costly or have short-term effects, failing to simultaneously address pollution prevention and vegetation restoration. A low-cost and stable solution is urgently needed.
The environmentally friendly composite isolation ecological remediation technology, with bioremediation at its core, uses environmentally friendly composite ecological blankets as a key carrier, combining physical amendments and vegetation establishment to cut off the pollution chain at its source.
This technology specifically addresses the "triple stress" of waste rock dumps—adjusting extreme pH with lime, supplementing nutrients with improved substrates, and constructing an isolation barrier using ecological blankets to create survival conditions for acid-tolerant and heavy metal-tolerant plants. The core technology of the environmentally friendly composite ecological blanket lies in its high-tenacity fiber and impermeable membrane composite structure, which offers multiple benefits: Physically, it effectively prevents seepage and acid formation, blocking the path of acid production from pyrite oxidation, while simultaneously locking in nutrients in the limestone layer and preventing rainwater erosion of the soil conditioner; structurally, its porous design ensures soil permeability, providing space for microbial activity and plant root growth; and its anti-aging material adapts to the harsh environment of open-pit mines, achieving long-term stable restoration.
The complete restoration process forms a three-dimensional protection system: First, the slope is leveled by excavation and filling, geogrid is laid and fixed, and an ecological bag retaining wall is set at the toe of the slope; after spraying a 2-3cm thick lime-vegetated soil mixture to adjust the pH, an environmentally friendly composite ecological blanket is introduced as an isolation layer in a key step, which is laid throughout and fixed with wooden stakes; then ecological rods are erected (longitudinal spacing 1.5-2.5m), a second layer of geogrid is laid, and a 10-12cm thick improved substrate layer and a seed layer (2-3cm) of pioneer plants resistant to acid and heavy metals, such as tall fescue, bahia grass, cosmos, coreopsis, bermudagrass, sesbania, leucocephala, thorn broom, magnolia multiflora, and purslane, are sprayed; finally, straw mats are covered to retain water, moisture, heat, and prevent rain erosion, providing a suitable environment for seed germination and seedling growth.
This technology, through a systematic design of "improvement-isolation-planting," overcomes the shortcomings of existing technologies, such as high cost, long cycle, and poor acid control effect. It effectively achieves ecological restoration and creates ecological landscapes on acidic waste rock dump slopes that lack vegetation conditions, ensuring slope structural stability. This results in greening and beautification, water and soil conservation, and runoff suppression. Moreover, the process is simple, easy to implement, and highly efficient, thus achieving the goal of ecological governance and providing a sustainable ecological restoration solution for acidic waste rock dumps in non-ferrous mines.
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