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

ICE to remain at airports amid DHS shutdown, Homan says

The U.S. “border czar,” Tom Homan, said Sunday that agents from U.S. Immigration and Customs Enforcement (ICE) will remain deployed at airports until operations return to “100% normal,” as the shutdown of the Department of Homeland Security (DHS) continues.

“We will maintain ICE presence until airports feel they are fully back to normal operations,” Homan said during an interview on Face the Nation on CBS.

Homan justified the deployment on security grounds, noting that the measure was ordered by President Donald Trumpamid widespread absenteeism among agents of the Transportation Security Administration, who have gone without pay for over six weeks due to the DHS shutdown.

According to acting TSA administrator Ha Nguyen McNeill, at least 460 TSA agents have resigned during the shutdown, while daily absenteeism has averaged 11%, exceeding 50% at some airports.

Homan warned that if TSA staffing levels do not recover after the shutdown, ICE agents will continue filling the gap. “ICE is there to support our TSA brothers and sisters. We will remain as long as needed to ensure airport security,” he said.

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The DHS shutdown reached 44 days on Sunday, making it the longest government shutdown in U.S. history. The impasse stems from disagreements between Democrats and Republicans over ICE funding.

A recent bipartisan Senate proposal to fund DHS without including ICE failed after being blocked by House Republicans, who insist on full funding for the agency.

Amid the deadlock, Trump signed an executive order directing Homeland Security Secretary Markwayne Mullin to immediately pay TSA agents to address what he called an “emergency situation” and restore order at airports, with payments expected to begin Monday.

International

Oil prices surge again as Middle East tensions persist

Oil prices climbed again on Friday for a second consecutive session, as markets remained concerned about a prolonged conflict in the Middle East with no tangible diplomatic progress.

North Sea Brent crude for May delivery rose 4.22% to close at $112.57 per barrel.

Meanwhile, U.S. West Texas Intermediate (WTI) approached the $100 mark, settling at $99.64, up 5.46%.

The decision by U.S. President Donald Trump to delay by ten days his ultimatum for the reopening of the Strait of Hormuz failed to reassure market participants.

“It means there will be ten additional days of disruptions in the Middle East for crude and refined product flows,” said Andy Lipow, of Lipow Oil Associates.

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“For prices to come down, a resolution to the conflict is necessary,” Lipow added. “And even in the event of a ceasefire, it is not certain that Iran would allow oil shipments to pass through the Strait of Hormuz.”

International

Young Spanish Woman Receives Euthanasia After Legal Battle, Sparking Debate

A 25-year-old Spanish woman, Noelia Castillo, received euthanasia on Thursday following a prolonged legal dispute with her father.

She passed away at a care center in Sant Pere de Ribes, about 40 kilometers from Barcelona, where she had been living for some time, according to Spanish media reports.

In an interview broadcast a day earlier on Antena 3, Castillo expressed her exhaustion after enduring prolonged suffering. She indicated that her decision was influenced by a combination of personal circumstances and health-related challenges, including family conflicts and a condition of paraplegia following a previous incident that left her with lasting physical consequences.

Spain legalized euthanasia in 2021, becoming one of the few countries that allow patients under strict conditions to seek medical assistance to end their lives in order to avoid what the law defines as unbearable suffering.

The case has reignited debate in Spain over the ethical, legal, and family dimensions surrounding euthanasia, as well as the broader issue of support for individuals in vulnerable situations.