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.

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“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.

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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.

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“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.

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“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.

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International

U.S. Senate Rejects Budget, Bringing Government Closer to Shutdown Amid DHS Dispute

The U.S. Senate voted on Thursday against a budget proposal in a move aimed at pressuring changes at the Department of Homeland Security (DHS), following the killing of two civilians during a deployment of immigration agents in Minneapolis.

All Senate Democrats and seven Republican lawmakers voted against the bill, which requires 60 votes to advance, pushing the country closer to a partial government shutdown that would cut funding for several agencies, including the Pentagon and the Department of Health.

The rejection came as Senate leaders and the White House continue negotiations on a separate funding package for DHS that would allow reforms to the agency. Proposed measures include banning Immigration and Customs Enforcement (ICE) agents from wearing face coverings and requiring them to use body-worn cameras during operations.

The vote took place just hours after President Donald Trump said he was “close” to reaching an agreement with Democrats and did not believe the federal government would face another shutdown, following last year’s record stoppage.

“I don’t think the Democrats want a shutdown either, so we’ll work in a bipartisan way to avoid it. Hopefully, there will be no government shutdown. We’re working on that right now,” Trump said during a Cabinet meeting at the White House.

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International

Trump Says Putin Agreed to One-Week Halt in Attacks on Ukraine Amid Extreme Cold

U.S. President Donald Trump said on Thursday that he secured a commitment from Russian President Vladimir Putinto halt attacks against Ukraine for one week, citing extreme weather conditions affecting the region.

“Because of the extreme cold (…) I personally asked Putin not to attack Kyiv or other cities and towns for a week. And he agreed. He was very pleasant,” Trump said during a Cabinet meeting broadcast by the White House.

Trump acknowledged that several advisers had questioned the decision to make the call.
“A lot of people told me not to waste the call because they wouldn’t agree. And he accepted. And we’re very happy they did, because they don’t need missiles hitting their towns and cities,” the president said.

According to Trump, Ukrainian authorities reacted with surprise to the announcement but welcomed the possibility of a temporary ceasefire.
“It’s extraordinarily cold, record cold (…) They say they’ve never experienced cold like this,” he added.

Ukrainian President Volodymyr Zelensky later commented on the announcement, expressing hope that the agreement would be honored.

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International

Storm Kristin Kills Five in Portugal, Leaves Nearly 500,000 Without Power

Storm Kristin, which battered Portugal with heavy rain and strong winds early Wednesday, has left at least five people dead, while nearly half a million residents remained without electricity as of Thursday, according to updated figures from authorities.

The revised death toll was confirmed to AFP by a spokesperson for the National Emergency and Civil Protection Authority (ANPEC). On Wednesday, the agency had reported four fatalities.

Meanwhile, E-Redes, the country’s electricity distribution network operator, said that around 450,000 customers were still without power, particularly in central Portugal.

Emergency services responded to approximately 1,500 incidents between midnight and 8:00 a.m. local time on Wednesday, as the storm caused widespread disruptions.

The Portuguese government described Kristin as an “extreme weather event” that inflicted significant damage across several regions of the country. At the height of the storm, as many as 850,000 households and institutions lost electricity during the early hours of Wednesday.

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Several municipalities ordered the closure of schools, many of which remained shut on Thursday due to ongoing adverse conditions.

Ricardo Costa, regional deputy commander of the Leiria Fire Brigade, said residents continue to seek assistance as rainfall persists.
“Even though the rain is not extremely intense, it is causing extensive damage to homes,” he noted.

In Figueira da Foz, a coastal city in central Portugal, strong winds toppled a giant Ferris wheel, underscoring the severity of the storm.