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.
Central America
Guatemala’s Attorney General Consuelo Porras Loses Bid for Constitutional Court Seat
Guatemala’s attorney general, Consuelo Porras, who has been sanctioned by the United States over corruption allegations, lost a key vote on Monday in which a public university selected two of the 10 magistrates for the country’s highest constitutional court. However, she could still seek a seat through another nominating body.
The election of five full magistrates and five alternates to the Corte de Constitucionalidad (CC) is taking place gradually over more than two months and is considered crucial in the ongoing struggle for control of Guatemala’s judiciary, which critics say has long been influenced by a political and economic elite accused of corruption.
According to results announced at a press conference, the governing council of the Universidad de San Carlos de Guatemala (USAC) rejected Porras, who had applied as either a full or alternate magistrate, and instead chose two candidates aligned with the university rector. The vote was held at a hotel in Antigua, about 35 kilometers from the capital.
Despite the setback, Porras — whose term as attorney general ends on May 16 — could still be nominated to the Constitutional Court by the Corte Suprema de Justicia, which appoints two magistrates. The remaining six are selected by the president, the bar association and Congress.
“It’s always a possibility,” the 72-year-old lawyer said days earlier when asked by reporters whether she would seek nomination through another institution if she lost the USAC vote.
Porras has been sanctioned by Washington and the European Union for allegedly attempting two years ago to block the inauguration of President Bernardo Arévalo and for pursuing legal actions against anti-corruption prosecutors, judges, journalists and social leaders since taking office in 2018.
The USAC vote was controversial because most members of the university’s governing council are serving beyond the expiration of their terms. Students, academics and social activists staged protests against Porras’ candidacy.
International
Florida judge sets 2027 trial in Trump’s $10 billion lawsuit against BBC
A federal judge in Florida has scheduled February 2027 for the trial in the lawsuit filed by U.S. President Donald Trump against the BBC, in which he is seeking $10 billion in damages for defamation.
Trump accuses the British broadcaster of airing a misleading edit of a speech he delivered on January 6, 2021, which, he says, made it appear that he explicitly urged his supporters to attack the U.S. Capitol in Washington.
The president filed the suit in December in federal court in Florida, alleging defamation and violations of a law governing business practices when the program was broadcast ahead of the 2024 election.
Trump is seeking $5 billion in damages for each of the two claims.
Lawyers for the BBC unsuccessfully asked the court to dismiss the case, arguing that Trump had not suffered a “legally recognizable harm,” since the investigative program Panorama, which included the edited footage, aired outside the United States.
International
Head-of-state diplomacy key to guiding China–U.S. ties, Beijing says
Head-of-state diplomacy plays an irreplaceable strategic guiding role in China–United States relations, Chinese Foreign Ministry spokesperson Lin Jian said on Thursday during a regular press briefing, when asked about high-level exchanges between the two sides.
Lin added that in a recent phone call, U.S. President Donald Trump once again expressed his intention to visit China in April, while Chinese President Xi Jinping reiterated his invitation.
Both sides remain in communication regarding the matter, the spokesperson said.
Lin noted that the essence of China–U.S. economic and trade ties lies in mutual benefit and win-win outcomes.
“Both parties should work together to implement the important consensus reached by the two heads of state, injecting greater certainty and stability into China–U.S. economic and trade cooperation, as well as into the global economy,” he said.
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