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

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.

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International

Over 300 U.S. Troops Wounded Since Start of Iran Conflict, CENTCOM Says

More than 300 U.S. service members have been injured since the start of the conflict with Iran on February 28, the United States Central Command confirmed on Friday.

“Since the beginning of Operation Epic Fury, approximately 303 U.S. service members have been wounded. The vast majority of these injuries are minor, and 273 troops have already returned to duty,” said U.S. Navy Captain Tim Hawkins.

A U.S. official, speaking on condition of anonymity to AFP, indicated that 10 American troops remain seriously injured.

According to the latest figures, an additional 13 U.S. service members have been killed since the conflict began, including seven in the Gulf region and six in Iraq.

Meanwhile, Iran’s armed forces warned on Friday that hotels hosting U.S. troops in the region could be considered legitimate military targets.

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“When U.S. forces enter a hotel, from our perspective that hotel becomes American,” said armed forces spokesperson Abolfazl Shekarchi in remarks broadcast on state television.

International

Iran rejects negotiations as tensions escalate with United States

Iran has no intention of entering negotiations and will continue to resist, Foreign Minister Abbas Araghchi said Wednesday night, dismissing recent statements by U.S. President Donald Trump about possible talks.

Speaking to state television, Araghchi argued that Washington’s call for negotiations reflects a position of weakness. He added that the Islamic Republic seeks to end the war on its own terms, ensuring that such a conflict does not recur in the future.

Meanwhile, the White House issued a stark warning, stating that Trump would “unleash hell” on Iran if it refuses to accept a deal to end the conflict. Despite Tehran’s rejection, U.S. officials maintained that discussions remain ongoing.

White House spokesperson Karoline Leavitt reinforced the administration’s position, warning that failure to acknowledge what she described as Iran’s military defeat would result in even stronger action from Washington.

The increasingly aggressive rhetoric from both sides has diminished hopes for a near-term de-escalation in the conflict, which began following U.S. and Israeli strikes against Iran on February 28.

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As tensions continue to rise, the prospect of a diplomatic resolution remains uncertain amid conflicting narratives and escalating threats from both governments.