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
Bolsonaro diagnosed with skin cancer amid coup conviction
Former Brazilian president Jair Bolsonaro has been diagnosed with skin cancer while serving a historic sentence for attempting a coup d’état. His medical team confirmed that the lesions have been removed and that, for now, he does not require further procedures, though he will need regular monitoring.
On Wednesday, September 17, Bolsonaro’s doctors confirmed the diagnosis. The announcement comes shortly after the former leader was convicted of orchestrating an attempted coup.
According to his physician, Claudio Birolini, Bolsonaro has “squamous cell carcinoma, which is neither the most benign nor the most aggressive form — it is intermediate.” Birolini warned, however, that this type of skin cancer “can carry more serious consequences.”
International
Milei praises Paraguay’s growth, calls Argentina’s last 20 years a ‘decline’
Argentine President Javier Milei praised Paraguay’s economic growth over the past two decades during a speech before the Paraguayan Congress on Wednesday (Sept. 17, 2025), crediting it to incentives that favored capitalism. At the same time, he contrasted that progress with what he described as Argentina’s deepening “decline” during the same period.
“If we compare the last 20 years of Paraguay with those of the Argentine Republic, we will find almost diametrically opposite results,” Milei told lawmakers during a special session of Parliament on the second and final day of his official visit to Asunción.
“While you have not stopped growing, we have deepened our decline. If we understand incentives as the engine of capitalism, Paraguay focused on preserving and strengthening them, while Argentina dedicated itself to chaining, directing, and suffocating them,” the right-wing leader stated.
International
Trump administration launches large-scale immigration operation in Chicago
The administration of U.S. President Donald Trump intensified a large-scale immigration operation in the Chicago area with the arrival of additional Border Patrol agents on Tuesday and the presence of Department of Homeland Security (DHS) Secretary Kristi Noem during a raid.
Noem posted a video on her X account showing the immigration operation, in which DHS reportedly removed “violent criminals” from the streets. The footage shows Noem observing the arrest of a man taken into custody at his home early Tuesday morning at an undisclosed location.
“I was in Chicago today to make it clear that we will not back down,” the secretary wrote. “Our work is just beginning,” she added.
The warning from Noem was echoed by U.S. Customs and Border Protection (CBP) Chief Gregory Bovino, who posted a video on X Tuesday showing multiple Border Patrol vehicles arriving in the city with the caption: “Chicago, we are here!”
Bovino, who led the immigration crackdown in Los Angeles implemented since last June, said the team will remain in Chicago to continue the mission they started in California.
Operation “Midway Blitz” is currently focused on the Chicago metropolitan area and its suburbs. Activists and residents have reported sightings of masked agents and unmarked vehicles in predominantly Latino neighborhoods.
Bolsonaro diagnosed with skin cancer amid coup conviction
Milei praises Paraguay’s growth, calls Argentina’s last 20 years a ‘decline’
Trump administration launches large-scale immigration operation in Chicago
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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