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

Macron meets Machado, stresses need for democratic transition in Venezuela

Emmanuel Macron met on Monday at the Élysée Palace with Venezuelan opposition leader María Corina Machado, where they discussed the importance of advancing a democratic transition in Venezuela.

In a message shared on social media, Macron highlighted Machado’s commitment to freedom and stressed the need to achieve a transition that is peaceful and respects the will of the Venezuelan people.

“I received María Corina Machado, Nobel Peace Prize laureate. Together, we discussed her commitment to freedom and the importance of achieving a democratic, peaceful transition in Venezuela that respects the will of its people,” he wrote.

For her part, Machado expressed her “deep gratitude” to Macron and to France for their support of democracy and freedom in Venezuela.

“We have gone through a long and painful journey, and we are now very close to freedom. Venezuela will become a nation of free and equal men and women—prosperous, safe, and united,” she said.

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International

Trump says Iran seeks new talks after failed negotiations in Pakistan

Donald Trump said on Monday that Iran has reached out to United States to resume negotiations, following the collapse of recent talks held in Islamabad.

“We’ve been contacted by the other side,” Trump told reporters, adding that Iran is eager to reach a deal “at all costs.” Speaking from the Oval Office, he reiterated that his main objective is to prevent the Islamic Republic from acquiring nuclear weapons and warned that he will not allow Iran to “blackmail” the international community.

After negotiations between Washington and Tehran ended without agreement on Sunday, Trump announced that the U.S. would move to block the Strait of Hormuz, a critical route for global oil trade.

The waterway had already been disrupted by Iran in response to a U.S. and Israeli offensive launched on February 28, causing significant shocks to the global economy.

In a post on Truth Social, Trump further warned that any Iranian vessel attempting to bypass the U.S. naval blockade in the strait would be “eliminated immediately.”

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The renewed tensions have pushed oil prices higher, while global stock markets have reacted negatively to the lack of an agreement in Islamabad.

International

Trump orders U.S. control of Strait of Hormuz after failed Iran talks

U.S. President Donald Trump announced on Sunday that the United States will take control of the Strait of Hormuz“effective immediately,” following the collapse of negotiations with Iran held in Islamabad.

In a post on Truth Social, Trump said he had ordered the U.S. Navy to block vessels attempting to enter or exit the strategic waterway, a key route for global energy trade.

“The meeting went well, agreement was reached on most points, but the only really important one — nuclear weapons — was not approved,” Trump said, referring to the talks with Iranian representatives.

The president also stated that he had instructed authorities to intercept ships in international waters that had paid tolls to Iran to transit the strait, calling such payments “illegal.” He further accused Tehran of hindering an agreement by deploying mines in the area, describing the move as “international extortion.”

Trump added that the United States will undertake efforts to clear mines from the strait and expressed confidence that a future agreement ensuring free navigation could eventually be reached.

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The announcement came after Vice President JD Vance and special envoys Steve Witkoff and Jared Kushner briefed the president on the outcome of the negotiations, considered the highest-level contacts between the two countries since the 1979 Islamic Revolution.

While Trump acknowledged that enough progress had been made to maintain a temporary truce, he criticized Iran for remaining unwilling to abandon its nuclear ambitions, calling its position “very inflexible” on the central issue.