Gold 0.21%
£3,216.10 OZ
Silver -2.37%
£48.47 OZ
Platinum -0.49%
£1,360.52 OZ
The Silver Britannia is capital gains tax free in the UK, making is a very popular choice with UK investors
See All
The concept of plants growing gold might sound like something out of a science fiction novel, but the idea is grounded in real science. This remarkable process is called phytomining, a form of metal extraction that uses specific types of plants to absorb metals from the soil. While gold production from plants won’t replace traditional mining anytime soon, the implications of phytomining are transformative, especially in the context of sustainable and eco-friendly mining alternatives.
Phytomining is a process where specific plants, known as hyperaccumulators, absorb metals like gold from the soil through their roots.
Plants such as Brassica juncea (Indian mustard) and Berkheya coddii are used in phytomining due to their ability to absorb high concentrations of metals.
After growing in metal-rich soil, the plants are harvested, burned, and processed to extract valuable metals from their ash.
Phytomining offers significant environmental benefits, such as reducing the need for harmful mining chemicals and assisting with soil remediation.
Though slower than traditional mining, phytomining could become economically feasible as demand for sustainable mining grows and technologies improve.
At the core of phytomining lies the natural ability of certain plants to absorb and store metals. Some species, called hyperaccumulators, have evolved to absorb unusually high concentrations of metals through their roots. These metals are then stored in the plants’ leaves and stems. While most plants can absorb some level of metals like nickel or cobalt, specific hyperaccumulators have been identified as capable of absorbing gold, although in very small amounts.
Plants absorb nutrients and metals through their root systems, drawing from the soil or water around them. In phytomining, scientists focus on areas where trace amounts of gold are present in the soil. When hyperaccumulators are planted in these areas, they slowly absorb gold particles. Over time, as the plant grows and develops, it continues to accumulate these particles in its tissue. The process takes time, but once the plants have absorbed sufficient amounts of metal, they can be harvested and processed to extract the gold.
Not all plants are suitable for phytomining. Only certain hyperaccumulator species can handle the task of extracting metals. Some key plants used in this process include Brassica juncea (commonly known as Indian mustard), Alyssum murale, and Berkheya coddii. These plants are well-known for their ability to accumulate metals like nickel, cobalt, and, in some cases, even gold.
Indian mustard, for instance, has been extensively studied for its potential in absorbing heavy metals from contaminated soil, making it a prime candidate for phytomining research. In contrast, Berkheya coddii has been shown to absorb exceptionally high amounts of nickel, and ongoing research is exploring its potential for gold absorption as well.
The notion of plants “growing” gold may sound far-fetched, but it is grounded in reality. Hyperaccumulator plants can absorb trace amounts of gold from the soil. While they won’t sprout golden leaves or gold nuggets, the gold they accumulate can be extracted and refined into usable metal. Through repeated cycles of planting, growing, and harvesting, small but meaningful quantities of gold can be recovered.
A single plant won’t yield significant amounts of gold, but collectively, with enough plants and over several cycles, the process can generate enough gold to make the effort worthwhile.
One notable example of phytomining in action comes from Australia, where eucalyptus trees have been observed to absorb gold from the soil through their root systems. Tiny gold particles were found in the leaves of these trees, indicating that they could potentially be used to identify areas where gold deposits are present in the soil. This discovery has sparked significant interest in the possibility of using plants as indicators of gold-rich soils, which could help pinpoint areas where more traditional mining techniques can be employed, or where phytomining itself could take place on a larger scale.
Phytomining is a multi-step process designed to allow plants to absorb, store, and ultimately release metals like gold. The process involves the following stages:
Site Identification: Scientists and researchers begin by identifying areas where gold is present in low concentrations. These sites may have soil rich in trace metals but unsuitable for traditional mining methods.
Planting Hyperaccumulators: Once a site is identified, hyperaccumulator plants, specifically suited to absorb metals like gold, are planted in the soil.
Growth and Absorption: As the plants grow, they begin to absorb gold particles from the soil, storing them in their leaves, stems, and roots.
Harvesting: After the plants have accumulated a sufficient amount of gold, they are harvested.
Burning and Processing: The harvested plants are burned to ash, and the metal is extracted from the ash using chemical processes. The remaining gold is then refined for use.
Subscribe to our newsletter and receive our latest publications directly in your mailbox
One of the most compelling reasons for the growing interest in phytomining is its potential to reduce environmental damage compared to traditional mining methods. Conventional gold mining often involves deforestation, soil degradation, and the use of harmful chemicals such as cyanide and mercury, which can have devastating environmental impacts. In contrast, phytomining relies on natural processes, using plants to extract metals while minimizing environmental harm.
Because plants are used to clean the soil, phytomining can also aid in soil remediation. In areas where soil has been contaminated by previous mining activities or industrial operations, hyperaccumulator plants can help remove harmful contaminants, gradually restoring the soil’s health.
In addition to extracting metals, phytomining offers the potential to remediate contaminated soils. Many hyperaccumulator plants not only absorb metals but can also remove other contaminants from the soil, helping to restore ecosystems that have been damaged by mining or industrial activities. For example, Indian mustard has been used in environmental cleanup efforts to remove lead and other heavy metals from contaminated sites.
While the environmental benefits of phytomining are clear, its economic feasibility remains a subject of ongoing research and debate. The process is slower than traditional mining, and the concentration of gold or other metals in plants is much lower than in mineral ores. This means that phytomining may not yet be a viable option for large-scale metal extraction in its current form. However, as demand for environmentally friendly alternatives grows, and as research into phytomining continues to advance, it could become an increasingly attractive option for both industries and governments.
Phytomining’s economic viability may also increase as the technology improves. Some experts believe that future advancements in plant genetics or biotechnology could help enhance the metal-absorbing capacity of hyperaccumulators, making the process more efficient and economically feasible.
Although gold is perhaps the most exciting metal that can be extracted through phytomining, it is not the only one. Phytomining can also be used to extract a wide variety of metals, including nickel, cobalt, and zinc. For example, the Alyssum plant is particularly adept at absorbing nickel, and extensive research has shown that phytomining could be a viable method for nickel extraction in some regions.
The ability to extract multiple types of metals from the soil makes phytomining a versatile tool, not just for precious metals but for other valuable industrial metals as well.
As concerns about environmental degradation and climate change continue to grow, phytomining could play a pivotal role in the future of sustainable mining. Scaling up phytomining operations to an industrial level could help meet the increasing demand for metals without causing additional harm to the planet. With ongoing advancements in plant science, biotechnology, and environmental engineering, the potential for phytomining to revolutionize metal extraction is significant.
In addition to its environmental benefits, phytomining also holds promise in the fight against climate change. The plants used in phytomining absorb carbon dioxide from the atmosphere during photosynthesis, contributing, albeit in a small way, to carbon sequestration.
The British sovereign is the most popular Gold coin with British Gold investors. The modern-day Gold Sovereign coin has been produced since 1817 with many design changes along the way. Auronum is an approved distributor of this wonderful British coin
