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 Floats “Friendly Takeover” of Cuba Amid Rising Tensions

U.S. President Donald Trump said Friday that his administration is considering what he described as a “friendly takeover” of Cuba, as Washington continues to increase pressure on the island’s communist government.

“The Cuban government is talking to us and they have very serious problems, as you know. They have no money, they have nothing at this moment, but they are talking to us and maybe we will see a friendly takeover of Cuba,” Trump told reporters as he departed the White House for a trip to Texas.

Earlier in the week, U.S. Secretary of State Marco Rubio said Cuba needed a “radical change,” shortly after Washington eased restrictions on oil exports to the island for what officials described as “humanitarian reasons,” amid a deep economic crisis.

The United States has imposed an energy blockade on Cuba since January, citing what it calls an “extraordinary threat” posed by the communist-run island, located roughly 150 kilometers (90 miles) off the coast of Florida, to U.S. national security.

International

Argentina’s Senate Reviews Milei-Backed Labor Overhaul

Argentina’s Senate on Friday began reviewing the Labor Modernization Law promoted by the administration of President Javier Milei, a proposal that would significantly reshape labor rules across the country.

The upper chamber opened its final discussion of the contentious initiative, which revises the method used to calculate severance payments — lowering the amounts owed in dismissal cases — and introduces an “hour bank” mechanism that allows overtime to be offset with paid leave rather than extra wages.

The legislation also broadens the classification of essential services, a change that would place new limits on the right to strike in designated sectors.

The bill was initially approved by the Senate on February 11 and then moved to the Chamber of Deputies, where lawmakers passed it with amendments. It has now returned to the Senate for definitive approval.

Outside the Congress building in Buenos Aires, workers, trade unions and left-wing organizations staged demonstrations beginning at midday. The gathering later thinned out amid reports of disturbances and a strong police presence. Security forces had secured the area surrounding the legislature since early morning hours.

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Union leaders contend that the reform weakens labor protections, while many business representatives back the measure but stress that sustainable formal employment will require economic expansion, improved credit conditions, greater investment and a more dynamic domestic market.

International

Federal Judge Blocks Trump Policy Allowing Deportations to Third Countries

A federal judge ruled on Wednesday that the policy of U.S. President Donald Trump’s administration allowing immigration authorities to deport foreign nationals to third countries without prior notice or the opportunity to object is unlawful. The decision marks another legal setback for the administration on immigration matters.

Judge Brian Murphy of the U.S. District Court for the District of Massachusetts struck down the regulation issued last year, which stated that Immigration and Customs Enforcement (ICE) was not required to notify migrants if they were to be sent to countries other than the one listed in their removal order, provided that receiving nations offered assurances they would not face persecution or torture.

Murphy ordered the measure vacated but granted a 15-day delay before the ruling takes effect, giving the Trump administration time to file an appeal.

In his decision, the judge concluded that the policy violates federal immigration law and migrants’ due process rights. He also questioned the lack of transparency surrounding the alleged assurances provided by receiving countries, stating that “no one really knows anything about these supposed ‘assurances.’” He added, “It is not right, and it is not lawful.”

The ruling follows several legal disputes involving deportations to third countries. Last year, the executive branch deported more than 200 Salvadorans to a maximum-security prison in El Salvador, invoking an old wartime law. The White House also held talks with Costa Rica, Panama, and Rwanda about receiving migrants who are not citizens of those countries.

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In May, the same judge determined that the government violated a court order when it attempted to remove a group of immigrants with criminal records to South Sudan without prior notice or an opportunity to raise claims of fear of persecution.

Although President Donald Trump took the case to the U.S. Supreme Court, which temporarily allowed the deportations to resume while a final decision was pending, the White House is expected to again appeal to higher courts to overturn this latest judicial ruling.