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.
“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.
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.
“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.
“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.
International
King Charles III Says U.S.-UK Alliance Is “Irreplaceable and Unbreakable”
King Charles III of the United Kingdom reaffirmed the strength of the British-American relationship on Tuesday during a speech before the United States Congress, describing the alliance between the two nations as “irreplaceable and unbreakable.”
The address, delivered at the Capitol, marked the first speech by a British monarch before Congress since Queen Elizabeth II in 1991 and comes at a time of political tensions between Donald Trump’s administration and the Labour government of Prime Minister Keir Starmer.
“As President Trump himself observed during his state visit to Britain last autumn, the bond of kinship and identity between the United States and the United Kingdom is invaluable and eternal. It is irreplaceable and unbreakable,” the king said.
While reflecting on the upcoming 250th anniversary of U.S. independence, which will be commemorated this year, Charles III stated that the partnership between the two countries “was born out of disagreement, but is no less strong because of it.”
The monarch emphasized the democratic values shared by both nations and noted that major global changes have occurred whenever the two allies found common ground.
“When we have found that way to agree, great changes have taken place not only for the benefit of our peoples, but for all peoples,” he said.
King Charles also quoted British Prime Minister Keir Starmer, who recently described the relationship as “an indispensable alliance.”
Concluding his speech, the monarch described the shared history of the United States and the United Kingdom as “a story of reconciliation, renewal, and an extraordinary partnership.”
He added that Washington and London have forged “one of the most consequential alliances in human history.”
“I pray with all my heart that our alliance continues to defend our shared values, together with our partners in Europe, the Commonwealth, and around the world, and that we ignore calls urging us to become increasingly isolationist,” Charles III stated.
The king ended by urging both nations to “recommit to one another in selfless service to our peoples and to all peoples of the world.”
International
Trump Administration Considers Denying Green Cards Over Political Views
The administration of President Donald Trump is evaluating new immigration guidelines that could deny permanent residency to immigrants based on their political views, according to a report published by The New York Times.
The proposed measures, outlined in internal Department of Homeland Security documents, would instruct immigration officials to take applicants’ public expressions and ideological positions into account when reviewing green card applications.
According to the report, cases involving “possible anti-American and/or antisemitic conduct or ideologies” would need to be referred to higher authorities for additional review.
Even if applicants have not violated any laws, authorities could still reject residency requests if they determine that individuals have “endorsed, promoted, or supported anti-American views.”
Among the factors listed in the guidelines are participation in pro-Palestinian activities, actions considered antisemitic, and the burning of the U.S. flag.
The documents reportedly describe such actions as “heavily negative” factors in immigration evaluations, potentially blocking applicants from obtaining permanent residency and, eventually, U.S. citizenship.
The directives also place particular attention on demonstrations held on university campuses following the 2023 Hamas attacks against Israel.
However, flag burning has previously been recognized by the U.S. Supreme Court as a form of protected free speech under the Constitution.
The proposal has sparked criticism from immigrant advocacy organizations, including the New York Immigration Coalition.
Its president, Murad Awawdeh, warned that the policies could pose a threat to fundamental rights and freedoms.
International
Mexico Arrests CJNG Leader “El Jardinero” in Nayarit
Mexican authorities arrested Audias Flores, known as “El Jardinero,” on Monday during a naval operation in the western state of Nayarit, delivering another major blow to the Cártel Jalisco Nueva Generación (CJNG).
Flores was considered one of the top regional leaders within the cartel and had reportedly overseen criminal operations along Mexico’s Pacific coast. Security analysts viewed him as a potential successor to slain drug kingpin Nemesio Oseguera.
The arrest was carried out by Mexico’s Navy Special Forces in a planned operation, according to Security Minister Omar García Harfuch.
The United States Department of the Treasury had previously identified Flores as a “significant foreign narcotics trafficker,” while U.S. authorities offered a reward of up to $5 million for information leading to his capture and extradition.
A U.S. grand jury indicted Flores in 2021 on charges including conspiracy to distribute cocaine and heroin.
His capture comes months after the reported death of “El Mencho,” an operation that Mexican authorities considered a priority due to the cartel leader’s alleged involvement in a 2020 assassination attempt against García Harfuch.
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