Despite the growing plastic pollution on our planet, petroleum-based polymers have turn into a integral part of contemporary lifeThey make cars and airplanes lighter and more energy efficient. They are a core material of contemporary medicine, helping to maintain equipment sterile, administer drugs, and make prosthetics, amongst other things. And they’re a vital a part of the wiring and hardware that underpins our technology-driven civilization.

The problem is that after they’ve lost their usability, they turn into waste and ultimately pollute our oceans, rivers and soil. and body.

But latest research from a team of UC Berkeley chemists offers a glimmer of hope with regards to the thorny problem of plastics recycling—a glimmer of hope that might allow us to get the most effective of each worlds and perhaps even get a tiny piece of the pie in the method.

The group has developed a catalytic recycling process that breaks the chains of among the mostly used plastics – polyethylene and polypropylene – in order that the constructing blocks of those plastics may be reused, in some cases with an efficiency of over 90%.

The catalysts needed for the response – sodium or tungsten – are available and cheap, they are saying, and initial tests have shown that the method is prone to be scalable to an industrial level. It uses no water and uses less energy than other recycling methods – and is much more efficient than producing latest, so-called virgin plastics, the researchers say.

“So by making one or two products at very high yields and at much lower temperatures, we use some energy, but significantly less than any other process that mines polyolefins or converts petroleum resources into monomers for polyolefins,” said John Hartwig, a UC Berkeley chemist and co-author of the study recently published within the journal Science.

Polyolefins are a family of thermoplastics that include polyethylene – the fabric used to make single-use and “reusable” plastic bags – and polypropylene – the ever present plastic that makes up our yogurts, microwaveable dishes, and automotive bumpers. Polyolefins are made by combining small chain links, or monomers, of ethylene or propylene, which are often derived from oil and natural gas.

Polyethylene and polypropylene make up the bulk (57%) of all polymer resins produced, the study authors noted. They have proven to be a plague on the environment and have been present in the shape of microplastics in drinking water, beer and each organ of the human body, in addition to in blood, semen and breast milk.

Hartwig and RJ Conk, a graduate student who led the research, said that they had not heard of the plastics, recycling or waste industries. They said they kept their technology under wraps until they published their work and received a patent on the method.

A spokeswoman for the Plastics Industry Association declined to comment or request an authority to review the document.

Hartwig said there are some limitations to the work. For example, the plastic have to be sorted before the method may be used. If the products are contaminated with other plastics corresponding to PVC or polystyrene, the result just isn’t good.

“We haven’t any way of [plastics] back to the monomer and in addition they poison our catalyst,” said Hartwig. “So PVC is bad for us and principally for everybody else. It can’t be chemically recycled.”

He said other contaminants – food waste, dyes, glues, etc. – could also potentially cause problems, but researchers are still at an early stage of the process.

But Plastic bagssuch as those used in supermarkets to store fruit and vegetables are promising because they are relatively clean and “no person knows what to do with them”. He said plastic bags are problematic for recycling facilities because they are known to clog up machinery.

“There are places where these bags are collected. I don't know what they do with them. Nobody wants them,” he said.

Others, however, are less confident.

Neil Tangri, science and policy director at GAIA, an international environmental organization, said he was not a chemist or chemical engineer and therefore could not comment on the methods, but noted that there were broader “real-world” problems that could prevent such technology from being successful.

“Plastic recycling just isn’t something we do well … we only get about 5 to six percent a 12 months. So we're taking a look at latest technologies that can try this higher,” he said. “My general warning is that going from analyzing small amounts within the lab to having a working process at scale in real-world conditions … is a big, huge leap. So it's not like we're going to see a transition to business production in the subsequent 12 months or two.”

He noted that while the reaction temperature is lower than that used in pyrolysis – burning plastic as fuel – or cracking – when plastics are made from virgin material – it still requires a lot of energy and therefore potentially leaves a pretty large carbon footprint. In addition, he said, 608 degrees – the reaction temperature mentioned – is the temperature “at which dioxins are likely to form. So that might be a challenge.” Dioxins are highly toxic byproducts of some industrial processes.

But, Tangri said, even if all of those problems could be solved – as well as the sorting and contamination problems cited by Hartwig – “it's so low cost to make latest plastic that the gathering, sorting, cleansing… they talked about… all those steps, the energy consumption, you simply can't sell your plastic. [recycled material] at a price that justifies all of it… And that's probably not due to the engineering approach. It's due to the reality of today's plastics economy.”

Lee Bell, technical and policy adviser to IPEN, a global environmental group, shares this view.

“What seems promising within the lab rarely translates to commercial-scale success and high yields from mixed plastic waste,” he said. “Not only do you might have to cope with the devilish problem of inevitable plastic contamination [because chemical additives are in all plastic] but additionally competes with low cost latest plastic available on the market.

“In my view, this is another laboratory experiment with plastic waste that will ultimately be thwarted by contamination with mixed plastic waste and commercial realities,” he said.

©2024 Los Angeles Times. Visit www.latimes.com. Distributed by Tribune Content Agency, LLC.

For many years Winning an Olympic medal was called the Holy Grail of sports.

Athletes usually are not the one ones looking for the Holy Grail. For example, when physicists discovered the Higgs boson in 2012, a particle considered certainly one of the basic constructing blocks of the universe, it was described as “a true Holy Grail.” Likewise, many automobile enthusiasts carry several Collector cars as holy grails because they’re so rare that finding them is an actual challenge.

In general, people confer with a goal that seems almost inconceivable to attain because the Holy Grail. More specifically, the term Holy Grail refers to especially the chalice that Jesus used on the Last SupperBut what exactly is the hunt for the Holy Grail?

As Specialist in medieval Christian historyI do know that several vital threads have come together over the centuries to present rise to the Holy Grail metaphor that is usually used today. These include elements of pre-Christian mythology, relic veneration within the Christian tradition, and medieval literature from Britain and France.

King Arthur and the Round Table

The first complete legend of the Holy Grail as we comprehend it today comes from fifteenth century Britain.The Death of Arthur“, Thomas Malory described intimately the virtues of the mythical hero King Arthur and the deeds of the Knights of the Round Table, equivalent to Sir Lancelot and Sir Gawain.

In some adventures a virgin carries the Holy Grail, called Sangrealmysteriously appears in certain castles. It provides food for the healthy and heals the wounded who drink from it. But on the court of King Arthur, the Holy Grail disappears after a miraculous feast and all of the knights swear to go and find it.

An earlier prophecy predicted that a young knight, Sir Galahad, could be the one to seek out the Grail. Probably a descendant from Joseph of Arimatheaa biblical figure who buried Jesus after his crucifixion, was considered pure enough to seek out the Holy Grail. In the tip, Galahad finds him, but his success is short-lived; his soul is taken to heaven together with the Grail.

Malory's legend was fueled by a renewed European interest within the Holy Land and the historical events within the lifetime of Jesus. on the time of the Crusades within the late eleventh to late thirteenth century. In writing this work he combined several elements from pre-Christian Celtic mythology and Christian devotional practice.

Two themes that Malory weaves into the legend of the Holy Grail are the heroic quest and the magical healing bowl or cup.

Celtic mythology accommodates stories of heroes who undertake arduous journeys searching for a goal that we’d call a quest. A legend from early Irish mythology goes: “The Search of the Sons of Turenn” tells the story of an epic journey of three brothers who kill a warrior leader, Ciran, who is an enemy of their father Turenn. Later admit their guilt towards Ciran's sonthe divine warrior Lugh. Lugh demands compensation for the murder of his father and requires that they embark on a dangerous quest to seek out several symbolic objects in return.

Irish and Welsh mythology also referred to certain magical, life-giving items equivalent to deep plates or cups that would heal the wounded with food and drinks, just like the Holy Grail does in Malory's King Arthur legend.

The Grail as a Christian relic

After the spread of Christianity from the Holy Land to ancient Gaul – today’s France was a part of this area – and Roman Britain In the fourth century, elements of pre-Christian legends began to flow into Christian literature.

Visitors to the Holy Land in these early medieval centuries brought with them many objects for veneration, so-called relics – especially people who were said to be related to the lifetime of Jesus. Even today claim to have the crib of Jesusthe actual Nails utilized in his crucifixion or Parts of the Crown of Thorns placed on his head.

But there was no mention of the Grail, allegedly the chalice he used on the Last Supperas a relic from the lifetime of Jesus in these early centuries. first reports about King Arthur from the ninth and twelfth The Holy Grail can be not mentioned within the history of Great Britain.

The early Grail story

The first mention of a seek for the Holy Grail is present in a French poem by Chrétien du Troyes from the late twelfth century entitled “Perceval, The Story of the Grail” – the story of the Grail. Here, a young knight, Perceval, encounters an odd procession while dining as a guest in an odd castle. A young woman appears carrying what’s described as a shining golden grail decorated with precious stones. The original word used might be refers to each a form of deep plate and a cup.

This vessel just isn’t specifically identified with the chalice of the Last Supper, however it is the primary mention of a special vessel called the “Grail” or “Graal” in Christian literature.

The Holy Grail later appears in a poem by Robert de Boron from the early thirteenth century, which is now Connection of the Grail with a disciple of JesusJoseph of Jewish city of Arimathea. In all 4 Gospels he asks for Jesus' body to be buried in a tomb. His request was granted, probably because he was either a wealthy man or member of the Jewish governing council, the Sanhedrin.

At that point, other legends were also circulating. Joseph was said to have been a relative of Jesus and to have been given the Holy Grail after the resurrection. travelled to Great Britain as a tin merchantthe apostles asked him to secretly bring the Holy Grail to Glastonbury to cover it.

When Malory wrote his version of the legend of King Arthur within the fifteenth century, he put together all these earlier elements: the holy chalice or Grail utilized by Jesus on the Last Supper, its presence as a holy relic in Britain, the vision of King Arthur and his knights to seek out it, and its discovery by an actual hero who was himself a descendant of Joseph of Arimathea.

An actual Holy Grail?

The veneration of relics remains to be a crucial a part of Catholic piety. Today, two churches in Spain claim to own the true Holy Grail: Valencia And, since 2014, LeonOthers trace the thought back to early medieval church paintings in Spain, from Maria holds a vivid cupOthers emphasize that the Grail is “a literary object.”

The influence of the legend of the Holy Grail on contemporary culture, especially in novels and movies, is probably more vital than its origins. In some Hollywood movies equivalent to “Raiders of the Lost Ark” And “The Da Vinci Codethe Holy Grail is the actual object being sought. In others, the search is modified, Focus on finding other powerful objectsor Destruction of a dangerous object or objectsbecause they have the potential to cause great evil instead of great good. The search for the Holy Grail was even featured in the comedy “Monty Python and the Holy Grail.”

Even today, the Holy Grail stays a robust metaphor for a longed-for, ultimate achievement that may only be achieved by the determined and worthy few. Some Olympic athletes actually win medals, some physicists actually find theoretical subatomic particles, and rare automotive collectors actually find unique cars.