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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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Indian-origin Scientist part of the team that discovered natural Human Antibodies to fight Ebola viruses

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A health worker takes the temperature of people to see whether they might be infected by the Ebola virus inside the Ignace Deen government hospital in Conakry, Guinea, March 18, 2016. VOA

New York, May 23, 2017: In a first, scientists led by one of Indian-origin have discovered natural human antibodies that can neutralise and protect animals against three virulent ebola viruses, an advance that could lead to vaccines against the deadly disease.

The broadly neutralising natural human antibodies were discovered in the blood of a survivor of the 2013-16 ebola outbreak in Western Africa, which caused more than 11,000 deaths and infected over 29,000 people.

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The blood was found to contain remarkable antibodies that block not just one strain of Ebola from infecting animal cells, but all five known strains — Zaire, Bundibugyo, Sudan, Reston and Tai Forest, the researchers said.

Our discovery and characterisation of broadly neutralising human antibodies is an important step toward a single therapy that could treat or prevent infection caused by any known ebolavirus, said Kartik Chandran, professor at Albert Einstein College of Medicine, New York.

Previously, monoclonal antibodies — which bind to and neutralide specific pathogens and toxins — emerged as one of the most promising treatments for Ebola patients. However, the therapy targetted just one of the specific ebola virus and could not work against the others.

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In the study, published in the journal Cell, the team found that two of the 349 monoclonal antibodies — ADI-15878 and ADI-15742 — from the Ebola survivor, potently neutralised infection by all five known ebolaviruses in tissue culture.

Both the antibodies were able to protect animals (mice and ferrets) that had been exposed to a lethal dose of the three major agents: ebola virus, Bundibugyo virus and Sudan virus.

The study also pinpointed the human genes that are the likely source of the immune cells that produce the two antibodies.

“We’d like to synthesise vaccine immunogens [proteins that trigger antibody production] that can elicit the same types of broadly protective antibodies in people,” Chandran added. (IANS)

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