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
Suspect Armed With Shotgun and Knives Detained at White House Correspondents Dinner
U.S. authorities confirmed Saturday that the suspect who stormed into the White House Correspondents’ Association Dinner while President Donald Trump was attending acted alone, adding that there is no ongoing threat to the public following the incident, which left one Secret Service agent injured.
Acting Metropolitan Police Department chief Jeff Carroll said during a press conference that the suspect was carrying “a shotgun, a handgun, and multiple knives” when he attempted to pass through a Secret Service security checkpoint inside the hotel lobby at approximately 8:36 p.m. local time.
“At this point, everything indicates that this was a lone actor, a lone gunman,” Carroll stated, adding that investigators have found no preliminary evidence suggesting the involvement of additional suspects.
During the exchange of gunfire inside the hotel corridors, the suspect was not struck by bullets but was subdued by law enforcement officers and later transported to a hospital for medical evaluation.
A member of the United States Secret Service Uniformed Division was shot during the incident, though the bullet was stopped by the officer’s ballistic vest, preventing serious injuries. The agent was taken to a hospital and is reportedly “in good spirits,” according to Carroll.
The shooting prompted the immediate evacuation of President Trump, Melania Trump, and several senior officials attending the event after multiple gunshots were heard outside the hotel’s main ballroom.
International
U.S. allows Venezuela to fund Maduro and Cilia Flores’ legal defense
Until now, the U.S. administration had blocked the Venezuelan government from covering the legal fees of Nicolás Maduro and his wife, Cilia Flores, who is also jailed and facing drug trafficking charges, due to international sanctions imposed on Venezuela.
The couple’s legal team had relied on that argument in an attempt to have the indictment dismissed, claiming that preventing a defendant from accessing counsel of their choice violates rights guaranteed under the Sixth Amendment of the U.S. Constitution.
However, the U.S. Treasury Department will now allow “defense attorneys to receive payments from the Government of Venezuela under certain conditions,” New York prosecutor Jay Clayton wrote in a letter dated Friday to Judge Alvin Hellerstein, who is overseeing the case.
According to the letter, the funds must have become available after March 5, 2026, and cannot come from Venezuelan oil sales regulated in the United States.
Since Maduro’s removal from power in early January, former Vice President Delcy Rodríguez has served as Venezuela’s interim leader.
The United States effectively controls Venezuelan crude exports, with revenues deposited into special accounts supervised by Washington.
Court documents filed on Friday show that the defense acknowledged the sanctions exemption and, for now, withdrew its motion seeking dismissal of the charges.
International
U.S. Sanctions Network Linked to Fentanyl Trafficking Across India, Guatemala and Mexico
The United States Department of State announced sanctions on Thursday against 23 individuals and companies allegedly linked to an international fentanyl production and smuggling network operating in India, Guatemala and Mexico.
According to the State Department, the network supplied precursor chemicals to the Sinaloa Cartel, which the United States has designated as a Foreign Terrorist Organization.
Washington declared fentanyl, a powerful synthetic opioid, a weapon of mass destruction last year due to its role in the ongoing overdose crisis in the United States.
“By targeting the entire supply chain — from chemical suppliers in Asia to logistical intermediaries in Central America and cartel-linked networks in Mexico — the Trump Administration is dismantling networks that destabilize governance across our hemisphere and threaten U.S. security,” the State Department said.
In a separate statement, the Office of Foreign Assets Control detailed sanctions against three Indian chemical and pharmaceutical companies: Sutaria, Agrat and SR Chemicals, along with a sales executive accused of supplying precursor chemicals to contacts in Guatemala and Mexico.
In Guatemala, authorities sanctioned J and C Import and Central Logística de Servicios, as well as intermediary Jaime Augusto Barrientos.
The OFAC also designated several intermediaries and import companies operating in the Mexican state of Sinaloa.
As part of the investigation, U.S. authorities identified Ramiro Baltazar Félix as a member of Los Mayos, a faction of the Sinaloa Cartel, and Alejandro Reynoso, accused of operating clandestine drug laboratories in Guadalajara.
Suspect Armed With Shotgun and Knives Detained at White House Correspondents Dinner
U.S. allows Venezuela to fund Maduro and Cilia Flores’ legal defense
U.S. Sanctions Network Linked to Fentanyl Trafficking Across India, Guatemala and Mexico
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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