A contaminated land remediation solution used to establish vegetation cover on sites of historic heavy metal and metalliferous pollution, in particular at mines and on metal processing sites.

Our system specially developed for polluted mine sites is a safe and effective way of establishing vegetation cover over metalliferous mine spoil.

It reduces the bioaccumulation of metals within growing vegetation; immobilises soil pollutants; and also helps in the establishment of a protective vegetation cover, reducing pollution mobilised by erosion through rain impact and water percolation.

It is both a quick and cost-effective solution for contaminated sites where access is difficult and clay capping solutions are too expensive.

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Frongoch Trials TerrAffix 2018 grassed up 22 days after seeding

Frongoch Trials grassed up 22 days after seeding

Our mine system solves the common environmental problems associated with areas of industrial metalliferous pollution:

  • Cold, acidic free-draining soils with low levels of nutrients, minerals and trace elements
  • Areas with little soil cover or very poor soils mixed with metal rich spoil
  • Areas such as former colliery sites which, whilst not officially “contaminated”, have very poor soil conditions and are prone to erosion, compaction, gullying and sparse vegetative cover
  • Sites where conventional capping is not possible due to accessibility or cost
  • Vegetation is contaminated by mining pollution on livestock grazed sites
  • Mobilisation and bioaccumulation of heavy metals within the vegetation, such as copper, nickel, lead and zinc
  • Industrial pollution entering the wider environment due to the lack of a soil cover, exposure and erosion by wind and water



  • Boosts depleted soils with nutrients, minerals and trace elements
  • British Biochar Foundation Accredited
  • Easy to handle and mix
  • Environmentally sustainable
  • Improves drainage and soil aeration
  • Provides opportunities for thriving microbial populations
  • Reduces mobilisation and bioaccumulation of heavy metals within the vegetation
  • Suitable for use on highly acidified soils

Case Studies

In Depth

Our mine system is specifically formulated for the phytoremediation of metalliferous mine sites and land contaminated with heavy metals.

It provides for quantified sequestered carbon, making it a sustainable and highly effective solution to industrial pollution.

Other benefits for industry include:

  • Affordability
    • The sustainable biochar used to produce our mine system is low cost and the product as a whole is substantially cheaper than traditionally expensive friable topsoil replacement or traditional hard-engineered options.
  • Efficacy
    • When our mine system is used as a hydroseeding additive, it is demonstrably more effective than standard hydroseeding. Independent large-scale slope testing has shown it to be 99.6% effective in soil erosion prevention and to have faster vegetation establishment.
    • Drainage and soil oxygenation are drastically improved, with conditions for microbiological and earthworm activity encouraged.
    • The mix used can be specifically tailored to the ground conditions on any particular site subject to soil testing.
  • Environmental sustainability
    • For our TerrAffix range our approach is to innovate and develop sustainable materials which are targeted to a particular problem within the wider environment. To that end we work closely with both accredited laboratories and academia to develop, trial and test new materials and ways of working. This mine system has been specifically formulated for the phytoremediation of land contaminated with heavy metal.
    • The mine system improves the resilience of plants to pests and diseases, provides opportunities for thriving microbial populations and boosts depleted soils with nutrients, minerals and trace elements.
    • Mine tailings include many toxic pollutants which contaminate surrounding areas. Phytostabilisation through the use of this system offers a long-term, cost-effective, sustainable contaminated land remediation option which promotes the re-establishment of vegetative cover whilst limiting pollutant transfer (Fellet et al., 2011).
    • Biochar is produced specifically for remediating polluted soil and has been described as a “win-win-win solution to energy, carbon storage, and ecosystem function” (Biederman and Harpole). The carbon sequestration properties will assist companies in meeting their carbon budgeting requirements and Corporate Social Responsibility (CSR) goals.

Our mine system uses a contaminated land remediation product for metalliferous mine sites made from amended biochar.

It immobilises soil pollutants, including heavy metals, and also helps in the regeneration of vegetation in areas adversely affected by historic industrial pollution.

It works in the following ways:

  • It is an amended matrix of high grade sustainable biochar augmented by naturally occurring nutrients and minerals specifically targeted towards acidic soils.
  • Soil structure is promoted and spaces within the soil are created, leading to improved soil aeration within the root zone.
  • Water and nutrient retention is improved within the root zone.
  • It reduces pollution by providing growing plants with the correct conditions to encourage long-term and sustainable growth.
  • It remediates land contaminated by heavy metal pollution, including copper, nickel, lead and zinc and reduces the mobility of these metals from contaminated soils into the vegetation.
  • It reduces the mobilisation and bioaccumulation of heavy metals within the vegetation by increasing photosynthesis, above-ground biomass and total quantity of soluble carbohydrate within grass species.
  • The biochar used in our mine system locks in pollutants, preventing them from leaching into watercourses. This makes it a highly effective and sustainable system of phytoremediation of contaminated land, which prevents wider pollution.
  • As biochar can help soil to store carbon for thousands of years, its use in the mine system leads to wider carbon sequestration and climate benefits.
  • A genuine sequestration value can be calculated for material applied.

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