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
Federal immigration agents kill man in Minneapolis, sparking protests and outrage
Federal immigration agents shot and killed a 37-year-old Minneapolis man during an operation on Saturday, authorities confirmed, sparking new protests and deepening outrage over federal immigration enforcement in the city.
The victim, identified as Alex Jeffrey Pretti, was a U.S. citizen and intensive care nurse who worked at a Veterans Affairs hospital and was widely respected in his community, according to colleagues and news reports.
Officials said the shooting occurred during a targeted immigration raid in south Minneapolis. The Department of Homeland Security (DHS) described the incident as an act of self-defense by agents who believed the man posed a threat.
However, videos reviewed by multiple outlets and eyewitnesses show Pretti holding a phone and not displaying a weapon before being pepper-sprayed, tackled by agents and then shot multiple times, raising serious questions about the official account.
The killing comes amid a broader federal immigration enforcement operation in the city and follows another controversial shooting in early January in which Renée Good, a 37-year-old U.S. citizen, was fatally shot by an ICE agent, leading to widespread protests and criticism of federal tactics.
International
Delcy Rodríguez seeks political agreements after Maduro’s ouster
Venezuela’s interim president, Delcy Rodríguez, on Saturday called for “reaching agreements” with the opposition to achieve “peace” in the country, which the United States says it now controls following the military operation that removed President Nicolás Maduro from power.
Rodríguez, who previously served as Maduro’s vice president, assumed interim leadership after the leftist leader was captured on January 3 during a military incursion that left nearly 100 people dead.
In her first public statements since taking office, Rodríguez signaled a shift in the strained relationship between Caracas and Washington, while also committing to the release of a “significant number” of political prisoners.
“There can be no political or partisan differences when it comes to the peace of Venezuela,” Rodríguez said during an address in the coastal state of La Guaira, broadcast on state television VTV.
“From our differences, we must speak to one another with respect. From our differences, we must meet and reach agreements,” she added.
The day before, Rodríguez instructed the head of Parliament — her brother Jorge Rodríguez — to convene talks with various political sectors in the country aimed at achieving “concrete and immediate results.”
International
Bogotá and Quito Seek Dialogue After Tariffs and Power Cut Escalate Tensions
Bogotá and Quito will hold an emergency bilateral summit next week amid recent developments that have strained relations between the two countries.
Tensions escalated this week after Ecuadorian President Daniel Noboa unexpectedly announced a 30% tariff on Colombian imports. Colombia responded with a reciprocal measure, imposing the same tariff on around 20 Ecuadorian products and suspending electricity exports to Ecuador.
Aware that electricity imports are critical to easing Ecuador’s recent energy crises, Quito further imposed a 30% tariff on the transportation of Colombian oil through its territory.
However, recent statements from the Ecuadorian government suggest that dialogue between the two sides has intensified in recent hours. Ecuador’s Minister of Foreign Affairs, Gabriela Sommerfeld, confirmed that active conversations are under way.
In Colombia, segments of the business sector have welcomed the prospect of negotiations. The National Business Council (Consejo Gremial Nacional, CGN), for instance, urged both governments to restore commercial relations, warning that the dispute “puts jobs and regional economic stability at risk.”
Federal immigration agents kill man in Minneapolis, sparking protests and outrage
Delcy Rodríguez seeks political agreements after Maduro’s ouster
Bogotá and Quito Seek Dialogue After Tariffs and Power Cut Escalate Tensions
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
-
International4 days agoMexican influencer “La Nicholette” kidnapped in exclusive area of Culiacán
-
International3 days agoTrump to invite Venezuela’s interim president Delcy Rodríguez to Washington
-
Central America3 days agoMazatenango Carnival cancelled amid State of Siege in Guatemala
-
International5 days agoDaily Mail publisher insists reports relied on legitimate sources amid privacy trial
-
International4 days agoMajor winter storm to blanket U.S. and Canada with snow, ice and arctic cold
-
International3 days agoMarkets rise as Trump halts Europe tariffs and floats Greenland agreement framework
-
International5 days agoGermany says football bodies alone will decide on possible World Cup boycott
-
International4 days agoColombia slams Ecuador’s 30% tariff as ‘economic aggression’
-
International4 days ago
Trump announces preliminary NATO agreement on Greenland, suspends tariffs on Europe
-
International3 days agoVenezuela’s interim president predicts 37% increase in revenues for 2026
-
International3 days agoJapan reopens Kashiwazaki-Kariwa Plant despite public concerns
-
Internacionales2 days agoMajor winter storm threatens “catastrophic” ice and snow across much of the U.S.
-
International1 day agoTrump-Era Defense Plan Prioritizes Border Security and Scales Back Global Commitments
-
International3 days agoFour minors killed in deadly clash between FARC dissidents in Colombia’s Amazon
-
Central America2 days agoGuatemala’s president rules out negotiations with inmates after prison riots
-
International4 days agoJosé Jerí claims destabilization attempt after videos of secretive meetings surface
-
International2 days agoGuatemala considers sending high-risk gang members to military prisons
-
International1 day agoBogotá and Quito Seek Dialogue After Tariffs and Power Cut Escalate Tensions
-
International2 days agoRights group says over 5,000 killed in Iran protests, mostly civilians
-
International5 hours agoDelcy Rodríguez seeks political agreements after Maduro’s ouster
-
International5 hours agoFederal immigration agents kill man in Minneapolis, sparking protests and outrage