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
El Chapo’s son Joaquín Guzmán López pleads guilty to U.S. drug trafficking charges
Joaquín Guzmán López, one of the sons of notorious Mexican drug lord Joaquín “El Chapo” Guzmán, pleaded guilty on Monday to drug trafficking charges in a U.S. court, months after his brother Ovidio reached a similar plea agreement, according to local media reports.
The defendant appeared before a federal court in Chicago early Monday afternoon and changed his previous plea in the case, the Chicago Tribune reported. U.S. authorities accuse him of forming, together with his three brothers, the cartel faction known as “Los Chapitos.”
The group is believed to have continued the operations of El Chapo, who has been serving a life sentence in the United States since 2019.
Guzmán López, 39, was arrested after landing in Texas in a small aircraft alongside cartel co-founder Ismael “El Mayo” Zambada.
International
Venezuela authorizes return flights as U.S. continues deportations amid rising tensions
The arrival of U.S. aircraft carrying undocumented Venezuelan migrants continued regularly despite rising tensions between Washington and Caracas over President Donald Trump’s military deployment in the Caribbean.
Trump maintains that the deployment is part of an anti-narcotics operation, while Venezuelan President Nicolás Maduro insists the true objective is to remove him from power and seize the nation’s oil resources.
Venezuela’s aviation authority has “received a request from the United States government to resume repatriation flights for Venezuelan migrants from that country to Venezuela,” the Ministry of Transportation said in a statement .
“Under the instructions of President Nicolás Maduro, authorization has been granted for these aircraft to enter our airspace,” it added.
Caracas will permit two Eastern Airlines flights to land on Wednesday and Friday.
Migration remains one of the Trump administration’s flagship issues. On Monday, the U.S. president held a meeting with his National Security Council to discuss the situation in Venezuela, a day after confirming he had spoken with Maduro by phone, without offering further details.
According to the Venezuelan government, roughly 75 deportation flights have been carried out this year, returning at least 13,956 Venezuelans from the United States.
International
20,000 rounds stolen from german army after driver leaves cargo unattended
The German army confirmed the theft of a shipment of ammunition that occurred a week ago while it was being transported by a civilian delivery driver, a military spokesperson told AFP, confirming earlier media reports.
According to Der Spiegel and the regional broadcaster MDR, around 20,000 rounds of ammunition were stolen from an unguarded parking lot near Magdeburg, in eastern Germany, while the driver was asleep in a nearby hotel. No information has been released regarding the identity of the suspects, and the military declined to specify the exact type or amount of ammunition taken.
Authorities have also not indicated how the perpetrators knew the cargo would be left unattended.
“The theft was discovered upon delivery at the barracks,” the German army spokesperson said.
A police spokeswoman confirmed to AFP that an investigation has been opened but refused to provide further details “for tactical reasons.”
Sources close to the German military, cited by Der Spiegel, believe it is unlikely the theft was a coincidence. They suspect the thieves waited for the driver to stop for the night before striking.
Der Spiegel also reported that the Defense Ministry normally requires two drivers for this type of transport to ensure the cargo is constantly monitored. However, in this case only one driver was assigned, meaning the civilian transport company failed to comply with the security protocols.
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