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Waste can be turned into an economic opportunity, says an Indian-Australian Scientist Veena Sahajwalla

The two-day event that addressed the need to develop the scrap recycling industry in India saw participation by over 280 delegates from the scrap and steel industry

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E-waste. Image source: Wikimedia Commons
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New Delhi, Sept 11, 2016: An Indian-Australian scientist who has been looking for ways to transform waste into something useful, said here on Saturday that non-metallic waste can be turned into new economic opportunity.

“We can either consider non-metallic waste as an environmental burden or turn it into a brand new economic opportunity,” Veena Sahajwalla, Director at the Centre for Sustainable Materials Research and Technology at the University of New South Wales in Australia, said.

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Veena Sahajwalla. Pic from Twitter account.
Veena Sahajwala. Pic from Twitter account.

Sahajwalla, who invented Polymer Injection Technology (PIT) that can be used to recycle end-of-life rubber tyres to replace coal and coke in making a green steel, was speaking at “Scrap Recycling Conference – Emerging Markets”.

The two-day event that addressed the need to develop the scrap recycling industry in India saw participation by over 280 delegates from the scrap and steel industry.

“Green steel could be a potential solution deal with the growing problem of disposal of waste tyres globally,” Sahajwalla added.

The PIT or “green steel” technology introduces a simple modification into the conventional manufacturing process for steel precisely and controls the injection of granulated waste tyres in conventional electric arc furnace (EAF) steel making, partially replacing non-renewable coke.

Waste tyres, like coke, are good sources of hydrocarbons. This means they can be usefully transformed in EAF steel making, as long as the process of injecting them into the furnace is precisely calibrated.

However, though modern tyres are fundamentally rubber products, they are a complex mix of natural and synthetic rubbers, and various structural reinforcing elements such as metals and chemical additives, which makes the recycling process more complicated from the traditional methods.

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This complex nature of wastes has also led to stockpiling, dumping and diversion to landfill, exposing people to environmental and health risks.

“So from the traditional reduce, recycle and reuse one has to move towards reforming. It’s the transformation of waste to higher value products,” Sahajwalla noted.

In addition, the waste stocks are full of materials that contain valuable elements like carbon, hydrogen, silicon and metals that we would otherwise source from virgin raw materials.

The technology may not only help control pollution but also open several avenues for metal and scrap processors in India, Sahajwalla said. (IANS)

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  • Manthra koliyer

    This can surely help us destroy all the debris.

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Scientists Identified 80 Genes That Trigger Depression

Nearly 80 genes that could be linked to depression have been identified, a finding that adds to the evidence that it is partly a genetic disorder, say scientists. Depression, a common mental disorder, is the leading cause of ill health and disability worldwide.

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Suspension may lead to depression.
Suspension may lead to depression. Pixabay

Nearly 80 genes that could be linked to depression have been identified, a finding that adds to the evidence that it is partly a genetic disorder, say scientists.

Depression, a common mental disorder, is the leading cause of ill health and disability worldwide.

According to the latest estimates from the World Health Organisation (WHO), more than 300 million people are now living with depression, an increase of more than 18 per cent between 2005 and 2015.

“This study identifies genes that potentially increase our risk of depression, adding to the evidence that it is partly a genetic disorder,” said lead author David Howard, research fellow at the University of Edinburgh.

Some of the pinpointed genes are known to be involved in the function of synapses, tiny connectors that allow brain cells to communicate with each other through electrical and chemical signals, the researchers said.

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Old Woman. pixabay

The study could help explain why some people may be at a higher risk of developing the condition as well as help researchers develop drugs to tackle mental health conditions.

“The findings also provide new clues to the causes of depression and we hope it will narrow down the search for therapies that could help people living with the condition,” Howard added.

For the study, published in Nature Communications, the team scanned the genetic code of 300,000 people to identify areas of DNA that could be linked to depression.

The WHO has identified strong links between depression and substance use disorders and diabetes and heart disease.

Studies Show: Elderly With Symptoms of Depression Are More Prone to Memory Problems

Depression is also an important risk factor for suicide, which claims hundreds of thousands of lives each year.

Lack of support for people with mental disorders, coupled with a fear of stigma, prevent many from accessing the treatment they need to live healthy, productive lives. (IANS)