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Recyclable Phone Batteries Are Now A Reality

Recyclable Phone Batteries Are Now A Reality

Waste is Becoming an Increasingly Important Issue

The disposal of trash and waste is unsurprisingly a mess worldwide. Many problems exist within the structure of trash disposal, with recycling being often neglected in many areas, inconsistent and underdeveloped trash removal infrastructure, and the lack of any trash disposal facilities.

This means it’s relatively common worldwide to see actual rivers of trash.

A component of this issue that is growing daily is the increasing problem of electronic waste, otherwise known as e-waste. E-waste is the garbage created after electronic devices are thrown away after being used.

E-waste makes up anything electronic that goes into the landfill, and the reason this is so problematic because these devices often contain hazardous and toxic chemicals that eventually make their way into our land, water, and atmosphere.

Of the e-waste that is created, 10% of it is made up of cell phone batteries. This specific component of cell phones is increasingly a problem. Beyond the issues I described above, cell phones and other electronics are burned, releasing these dangerous chemicals and creating new ones.

However, many of these issues could be circumvented just by making easily recyclable phone batteries. This is how it could work.

Why Hasn’t This Been Done Already?

One of the major obstacles preventing cellphone batteries from being recycled commonly is that lithium-ion batteries are quite challenging to recycle or reuse.

However, there are many other ways to create cellphone batteries, and one of these ways could present itself as the way forward to create sustainable personal cellular devices.

The RMIT School of Engineering in Australia developed this new recyclable phone battery. The design primarily uses a material called Mxene, a material similar to graphene commonly used in electronics like traditional, not-so-recyclable phone batteries. The primary reason why Mxene isn’t already found in most cell phones is that it rusts easily, which hampers conductivity.

Compared to graphene or lithium-ion batteries, Mxene rusts much quicker, but this property ironically could be the very thing that extends the device’s life. Using sound waves to “brush” off the rust, the researchers estimate that they can extend a conventional phone battery’s life span by three times and create truly recyclable phone batteries.

Hossein Alijani, a Ph.D. student at the university and co-lead researcher of the project, said, “Current methods used to reduce oxidation rely on the chemical coating of the material, which limits the use of the MXene in its native form, in this work, we show that exposing an oxidized MXene film to high-frequency vibrations for just a minute removes the rust on the film. This simple procedure allows its electrical and electrochemical performance to be recovered.”

 

The Future is in Recycling

Reducing waste, period. It is one of the most critical issues facing us. However, in the meantime recycling the waste we are creating is the best solution to the massive amounts of garbage contaminating our planet.

As we continue to move into a world in which electronics play an increasingly important role in our daily lives, we must abandon the disposable electronic-use model. Creating easily removable and recyclable phone batteries is a challenge that is necessary for us to overcome.

With developments in technology like this becoming more common, we will soon see a world without contradiction between electronics and environmental sensitivity. As part of this movement, MXene recyclable phone batteries appear to be the latest and most promising solution to this problem that we have created.

 

 


 

 

Source Happy Eco News

Scientists convert used plastic bottles into vanilla flavouring

Scientists convert used plastic bottles into vanilla flavouring

Plastic bottles have been converted into vanilla flavouring using genetically engineered bacteria, the first time a valuable chemical has been brewed from waste plastic.

Upcycling plastic bottles into more lucrative materials could make the recycling process far more attractive and effective. Currently plastics lose about 95% of their value as a material after a single use. Encouraging better collection and use of such waste is key to tackling the global plastic pollution problem.

Researchers have already developed mutant enzymes to break down the polyethylene terephthalate polymer used for drinks bottles into its basic units, terephthalic acid (TA). Scientists have now used bugs to convert TA into vanillin.

 

Vanillin is used widely in the food and cosmetics industries and is an important bulk chemical used to make pharmaceuticals, cleaning products and herbicides. Global demand is growing and in 2018 was 37,000 tonnes, far exceeding the supply from natural vanilla beans. About 85% of vanillin is currently synthesised from chemicals derived from fossil fuels.

Joanna Sadler, of the University of Edinburgh, who conducted the new work, said: “This is the first example of using a biological system to upcycle plastic waste into a valuable industrial chemical and it has very exciting implications for the circular economy.”

Stephen Wallace, also of the University of Edinburgh, said: “Our work challenges the perception of plastic being a problematic waste and instead demonstrates its use as a new carbon resource from which high value products can be made.”

About 1m plastic bottles are sold every minute around the world and just 14% are recycled. Currently even those bottles that are recycled can only be turned into opaque fibres for clothing or carpets.

 

The research, published in the journal Green Chemistry, used engineered E coli bacteria to transform TA into vanillin. The scientists warmed a microbial broth to 37C for a day, the same conditions as for brewing beer, Wallace said. This converted 79% of the TA into vanillin.

Next the scientists will further tweak the bacteria to increase the conversion rate further, he said: “We think we can do that pretty quickly. We have an amazing roboticised DNA assembly facility here.” They will also work on scaling up the process to convert larger amounts of plastic. Other valuable molecules could also be brewed from TA, such as some used in perfumes.

Ellis Crawford, of the Royal Society of Chemistry, said: “This is a really interesting use of microbial science to improve sustainability. Using microbes to turn waste plastics, which are harmful to the environment, into an important commodity is a beautiful demonstration of green chemistry.”

Recent research showed bottles are the second most common type of plastic pollution in the oceans, after plastic bags. In 2018, scientists accidentally created a mutant enzyme that breaks down plastic bottles, and subsequent work produced a super-enzyme that eats plastic bottles even faster.

 


 

By Damian Carrington, Environmental Editor

Source The Guardian