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
U.S. strike in Caracas killed 32 cuban security officers, experts say surprise was crucial
Two days after a U.S. military attack on a military complex in Caracas, Havana confirmed that 32 members of its security forces were killed in the operation, some of whom were likely responsible for protecting Venezuelan leader Nicolás Maduro. The Venezuelan government also reported that 23 of its own military personnel died during the assault.
Of the Cuban dead, 21 belonged to the Ministry of the Interior, which oversees intelligence services, and 11 were from the Revolutionary Armed Forces. No official information has been released regarding potential injuries.
Experts consulted by AFP agreed that the element of surprise was the key to the success of the U.S. military operation, which was meticulously prepared over months and kept entirely secret. “Cuban intelligence … convinced the Maduro regime and its security agencies that the United States would never attack Venezuelan territory,” explained José Gustavo Arocha, a former Venezuelan army officer and expert at the Center for a Secure Free Society, a U.S. defense think tank.
Fulton Armstrong, a former U.S. intelligence officer and Latin America researcher at American University in Washington, also highlighted the failure to anticipate the attack and to detect U.S. helicopters entering Venezuelan airspace, noting that even a five- to ten-minute warning could have made a significant difference for the guards and for Maduro.
U.S. forces additionally benefited from “incredible” real-time intelligence provided by stealth drones to monitor movements of the Venezuelan leader, according to experts. A highly sophisticated combat team was deployed, and analysts believe the order to “fire to kill” was likely given.
Paul Hare, former British ambassador to Cuba and Venezuela, added that Cuban intelligence also underestimated the extent of U.S. access to internal cooperation within Venezuela’s security apparatus, contributing to the operation’s success.
International
Report: Vatican mediation included russian asylum offer ahead of Maduro’s capture
The Vatican reportedly attempted to negotiate an offer of asylum in Russia for Venezuelan President Nicolás Maduro before his capture by U.S. forces last Saturday, according to The Washington Post.
The U.S. newspaper reported that Vatican Secretary of State Cardinal Pietro Parolin spoke with U.S. Ambassador to the Holy See Brian Burch about a supposed Russian proposal to grant Maduro asylum. A source familiar with the offer said that what was proposed “was that he would leave and be able to enjoy his money,” and that part of the plan involved Russian President Vladimir Putin guaranteeing Maduro’s security.
Despite these diplomatic efforts, the United States carried out a military operation that resulted in Maduro’s capture and detention, along with his wife Cilia Flores, who are now being held in New York on narcoterrorism charges.
The Washington Post also noted that U.S. President Donald Trump may have invited Maduro to Washington for in-person discussions about safe conduct, an offer that Maduro reportedly declined.
International
Pope Leo XIV warns of rising “war enthusiasm” in global politics
“War is becoming fashionable again, and war enthusiasm is spreading.” Pope Leo XIV delivered a somber assessment of international politics on Friday, sharply criticizing the growing reliance on force by nations at a time when his country of birth is increasing military displays.
While offering New Year’s greetings to the diplomatic corps, the U.S.-born pope — who also holds Peruvian nationality — delivered one of his strongest speeches to date, denouncing the “worrying weakening of multilateralism” and the emergence of what he described as “war enthusiasm.”
From the outset of his address to ambassadors accredited to the Holy See, delivered in English, the pontiff lamented the rise of a “diplomacy of force, by individuals or groups of allied states,” at the expense of dialogue, warning that such trends threaten the global order established after World War II.
“Peace is no longer sought as a gift or as a good desirable in itself, or as the pursuit of ‘the establishment of an order willed by God, one that entails greater justice among human beings.’ Instead, it is pursued through weapons as a condition for asserting one’s own dominance,” the head of the Catholic Church said, without directly naming any country.
His remarks come amid ongoing conflicts between Ukraine and Russia and in the Gaza Strip, and against a broader international backdrop marked by European concerns over a potential U.S. takeover of Greenland, the autonomous Danish territory, a scenario that could threaten the cohesion of NATO.
U.S. strike in Caracas killed 32 cuban security officers, experts say surprise was crucial
Report: Vatican mediation included russian asylum offer ahead of Maduro’s capture
Pope Leo XIV warns of rising “war enthusiasm” in global politics
Tec de Monterrey honors one of its students for his contribution to nanotechnology in medicine
Defense Minister commends salvadoran soldier for Central American Cross Country victory
Extension of the state of emergency approved in southern Chile
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