Rare earth mining poses toxic risks

Rare earth ore compared to a US nickel - Photograph: Wikipedia

The Consumers Association of Penang (CAP) urges the Kedah state government and the federal governments to declare a moratorium on any mining, production and refining of rare earth elements.

We refer to the recent announcement by Kedah Menteri Besar Muhammad Sanusi Md Nor last week that the state intends to mine for a rare earth element (REE) which could be worth up to RM62bn.

REEs are extracted from ores and minerals, as they are not often found concentrated in mineable deposits. REEs are almost always found in conjunction with significant radioactivity as these ores and minerals naturally contain uranium and thorium.

There are 17 rare earth elements existing namely, scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium. Can the MB let us know which type of non-radioactive rare earth is found in Kedah?

Rare earth mining and processing is a much more environmentally hazardous process than other mining activities as radioactive waste is formed. They have serious environmental impacts if not properly managed.

Low-level radioactive tailings from the presence of thorium and uranium in REEs ores are a potential hazard, and improper handling of these substances can cause enormous environmental and health damage. Both thorium and uranium remain radioactive for hundreds of years, and exposure to them has been linked to increased risks of lung, pancreatic and other cancers.

The mining of REEs has caused contamination of soil and water. Radioactive waste can leach out into aquatic environments and be absorbed by aquatic vegetation, which can then bioaccumulate and potentially enter the human food chain if livestock or humans choose to eat the vegetation.

Exposure to radioactive waste can lead to cancer, respiratory issues, dental loss and even death. The group most at risk are children, as radioactive waste can affect the neurological development of children, affecting their IQ and potentially causing memory loss.

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Nowhere is the industry’s ecological and human fallout starker than in China, which accounts for over 80% of the world’s REE output. In Jiangxi province, rare earth mining has led to extensive water and soil pollution, while concrete leaching ponds and plastic-lined wastewater pools dot the hills.

As the clean-up of these polluted sites begins, China’s Ministry of Industry and Information Technology estimated the clean-up bill could amount to 38bn yuan ($5bn). According to Chinese authorities, it will take 50-100 years before the environment can fully recover, and the cost borne by the locals has been high.

In Jiangxi province, two methods were used to extract the rare earths. The first method involved removing layers of topsoil and transporting them to a leaching pond, where acids and chemicals were used to separate the various REEs from clay, soil and rock.

The second process involved drilling holes (which the menteri besar of Kedah vaguely alluded to) into hills, inserting PVC pipes and rubber hoses, and then flushing out the earth using a mix of water and chemicals. This mix was then directly pumped or transported to the leaching pond for further separation of REEs.

Chinese officials have said that mining has dumped excessive amounts of ammonia and nitrogen compounds into the region’s groundwater. Other pollutants like cadmium and lead are released during the mining process, and long-term exposure to these metals pose health risks as well.

Rare earth mining has led to radioactive material clinging to the elements in some areas according to a researcher who studied the environmental and health effects. The result he says could be central nervous system cancers like bone cancer, skin cancer and cardiovascular and respiratory disorders.

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Nearer home at the rare earth refinery at Bukit Merah in Perak, the Consumers Association of Penang (CAP) had documented birth defects and leukaemia cases within five years in the community. Doctors say thorium contamination from the plant led to an increase in cancer.

The company, Asian Rare Earth, had also sold calcium phosphate, a by-product of rare earth processing, as fertiliser. According to a former Bukit Merah resident, the cows that ate the grass (grown with fertilisers) all died.

The factory operated by Mitsubishi Chemical closed in 1992 amid strong opposition from residents, environmentalists and Japanese politicians. The company was involved in a $100m clean-up, which entailed the removal of over 80,000 steel barrels of radioactive waste to a hilltop repository. The US Environmental Protection Agency lists Bukit Merah as one of Asia’s largest radioactive waste clean-up sites.

It looks like history is about to repeat itself with the Lynas Advanced Materials Plant (Lamp) rare earth refinery, which is set to become the world’s largest processing facility of rare earth.

Lynas’s operations, a complex project involving radiation hazards, were fast-tracked for approval without a permanent disposal facility in place.

Since it started in 2012, it has accumulated waste, namely the water leached purification residue, which is radioactive, totalling 451,564 metric tonnes and the neutralisation underflow waste which has been classified as scheduled waste, amounting to 1.2 million tonnes as at February 2018.

Currently, the massive mounds of wastes are openly accumulating within Lynas’ factory site. The neutralisation underflow waste storage capacity had reached its limit in June 2018, and the need for a secure landfill is nowhere in sight. To date, the public has no knowledge of the planned permanent disposal facility.

In 2018 an Executive Committee Report on Lynas noted that the main cause of sediment pollution in Sungai Balok was from the Lamp operations. Citing the Radiological Impact Assessment Report (2016), it states: “There is a statistically significant increase in U 238 radioactivity from the stream sediments at the location of Lamp effluent dumps as compared to the downstream location.”

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This means that radioactive materials such as Uranium-238 are able to settle from water and accumulate in sediments at the bottom of the river. Bottom feeders are able to collect these radioactive materials from river water and sediment.

The report also found “non-compliance with some heavy metals (nickel, lead, chromium and mercury) in groundwater particularly alarming”.

In light of the above health and environmental hazards and problems associated with rare earth mining, namely radioactive waste, heavy metals contamination, waste disposal and storage, and lifetimes, the menteri besar must realise that these issues and problems will have to be borne by the state and the people of Kedah.

It will bring about irreversible damage to the environment such as destruction of forests, the devastation of the watershed, scarred desert-like landscapes, poisoned soils and waters, and a public health crisis.

The financial, social and ecological costs will be astronomical. The Malaysian experience and its toxic legacies are sobering reminders, and Kedah should learn from it.

Does the Kedah Department of Environment have the capacity to monitor and evaluate REEs mining and processing, supervise the decommissioning and approval of suitable land for the permanent disposal facility and disposal of toxic wastes, among others?

Given the dangers highlighted above, CAP urges the state and federal governments to declare a moratorium on any mining, production and refining of REEs and the disposal and storage of their waste.

Mohideen Abdul Kader is president of the Consumers Association of Penang (CAP)

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Norehan
31 Jan 2021 11.59am

Can we have more scientific facts and actual Malaysian measurement results to substantiate that the toxic waste concerns please? At present we don’t even know what type of REE is in Kedah…Proactive concerns are ok but it should not get in the way of economic growth and job creation. Risks needs to be mitigated, regulated and enforced, using benchmarks from big global REE players in China and USA for example.

Bill Jay
Bill Jay
24 Dec 2020 6.06pm

Monitoring is showing no impact. How about some balanced non-alarmist reporting. Or would you prefer to see hundreds lose jobs over a conspiracy theory.

Gursharan Singh
Gursharan Singh
24 Dec 2020 10.27am

Does GREED superscedes public interest and environment?