International

Chilean scientist plans to clean up mining with ‘metal eating’ bacteria

AFP

Starving microorganisms capable of surviving in extreme conditions have already managed to “eat” a nail in just three days.

In Chile, a scientist is testing “metal-eating” bacteria she hopes could help clean up the country’s highly-polluting mining industry.

In her laboratory in Antofagasta, an industrial town 1,100-kilometers north of Santiago, 33-year-old biotechnologist Nadac Reales has been carrying out tests with extremophiles — organisms that live in extreme environments.

Reales came up with her idea while still at university as she was conducting tests at a mining plant using microorganisms to improve the extraction of copper.

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“I realized there were various needs in the mining industry, for example what happened with the metallic waste,” she told AFP.

Some metals can be recycled in smelting plants but others, such as HGV truck hoppers that can hold 50 tons of rock, cannot and are often discarded in Chile’s Atacama desert, home to the majority of the country’s mining industry.

Chile is the world’s largest producer of copper, which accounts for up to 15 percent of the country’s GDP, resulting in a lot of mining waste that pollutes the environment.

In her research, Reales, who now runs her own company Rudanac Biotec, concentrated on iron-oxidizing bacteria called Leptospirillum.

She extracted the bacteria from the Tatio geysers located 4,200 meters above sea level, some 350 kilometers from Antofagasta.

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The bacteria “live in an acidic environment that is practically unaffected by relatively high concentrations of most metals,” she said.

“At first the bacteria took two months to disintegrate a nail.”

But when starved, they had to adapt and find a way of feeding themselves.

After two years of trials, the result was a marked increase in the speed at which the bacteria “ate,” devouring a nail in just three days.

– Surprising benefit –

Reales says “chemical and microbiological tests” have proved the bacteria are not harmful to humans or the environment.

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“We’ve always seen a lot of potential in this project that has already passed an important test in the laboratory,” said Drina Vejar, a microbiologist who is part of a four-person team working with Reales.

“It’s really necessary at this time when we have to plan for a more sustainable development, especially in all these cities with so many polluting industries.”

Mining companies have shown interest in the research but while Rudanac Biotec previously benefitted from a state fund for start-ups, the company needs investment to move on to its next stage of trials.

Reales says she needs money to see if her method will “eat a medium sized beam or a hopper.”

When the disintegration process is complete, what remains is a reddish liquid residue, a solution known as a lixiviant that itself possesses a surprising quality.

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“After biodisintegration the product generated (the liquid) can improve the recovery of copper in a process called hydrometallurgy,” said Reales.

Essentially, the liquid residue can be used to extract copper from rock in a more sustainable manner than the current use of chemicals in leaching.

Reales says it means green mining is “totally feasible.”

That is of great interest to mining companies that could use it to improve their large scale extraction of copper or other minerals, while also reducing their pollution, something they are required to do by law.

Reales recently submitted a request for an international patent for her technology, but more importantly she hopes it will help reduce metal waste blotting the landscape in the mining regions of her country.

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International

Trump Defies Supreme Court With New 10% Global Tariff

Defiant in the face of a judicial setback, Donald Trump on Friday imposed a new across-the-board 10% tariff after the Supreme Court of the United States ruled that he does not have the authority to levy customs duties under the guise of a national emergency.

The Republican president signed the order in the Oval Office and announced on social media that the measure would take effect “almost immediately.” According to a statement from the White House, the decree will formally enter into force on February 24 for a period of 150 days.

It remains unclear whether the new tariff will apply to countries that have already negotiated trade agreements establishing rates higher than 10%.

Earlier in the day, the conservative-majority court ruled that a 1977 law cited by Trump to abruptly impose tariffs on individual countries — disrupting global trade — “does not authorize the president to impose tariffs.”

Trump said he was “deeply disappointed” by the decision and accused some justices of being influenced by “foreign interests.”

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Although he has made variable tariffs a cornerstone of his foreign policy, Trump acknowledged that it is uncertain whether the government will have to refund revenue already collected. A study by the University of Pennsylvaniaestimated that the amount at stake could reach as much as $175 billion.

“That issue was not addressed by the Court,” Trump told reporters, warning that the legal battle could drag on for “years.”

Justice Brett Kavanaugh, who dissented from the Court’s 6–3 majority opinion, cautioned that the legal process could become a “mess.”

Trump denied any error or haste in using tariffs as a policy tool, arguing instead that the six justices who ruled against him were motivated by “political correctness.” Vice President JD Vance wrote on X that the Court had acted “outside the law.”

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International

U.S. Targets Members of Outgoing Boric Administration With Visa Revocations

The United States government announced on Friday the revocation of visas for three Chilean officials—whose identities were not initially disclosed—citing activities that allegedly “undermined regional security,” an accusation that Chile denies.

In a statement, the U.S. Department of State did not provide specific details about the individuals involved but criticized the outgoing administration of leftist President Gabriel Boric.

“The legacy of the Boric government will be further tarnished by actions that undermine regional security to the ultimate detriment of the Chilean people,” the statement read. It was signed by U.S. Secretary of State Marco Rubio.

Chile’s Minister of Transport, Juan Carlos Muñoz, later confirmed in a video message to the press that he is among those sanctioned.

“I was recently informed that my visa to enter the United States has been revoked by that country, which I deeply regret,” Muñoz said.

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The U.S. statement also noted that Washington hopes to “advance shared priorities, including those that strengthen security in our hemisphere, with the upcoming Kast government.”

The electoral victory of ultraconservative leader José Antonio Kast was welcomed in Washington, which has been building alliances with like-minded governments in the region to reinforce its diplomatic and economic agenda—particularly in response to China’s growing investment presence in Latin America.

“We remain committed to promoting accountability for Chilean individuals who deliberately work to destabilize our hemisphere,” the statement concluded.

International

Three Injured in Mail Package Explosion at Buenos Aires Gendarmerie Academy

Three people were injured on Friday after a mail package exploded at the Escuela Superior de Gendarmería in Buenos Aires, according to a statement released by Argentina’s Ministerio de Seguridad.

The explosion occurred at 1:49 p.m. local time (16:49 GMT) inside a building located less than one kilometer from the Government House, the ministry reported.

“Personnel from the force handled a parcel that had reportedly been received months earlier and was being stored at the facility. When it was opened, an explosion occurred, causing injuries to two officers,” the statement said.

The ministry added that both injured officers were transported to a hospital and are not in life-threatening condition. “A third officer remains in recovery and is out of danger,” authorities confirmed.

Following the incident, police cordoned off the surrounding area, halted traffic, and evacuated the 11-story building as well as adjacent buildings on the same block.

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Mariana Bornio, an employee at a telecommunications company located in a neighboring building, said that as she was being evacuated, she saw one of the injured gendarmes leaving the scene shirtless and covered with a blue medical gown.