• 3 minutes Tesla is the Most American Made Car!
  • 7 minutes Should the US government be on the hook for $15 billion?
  • 9 minutes California breaks 1 GW energy storage milestone
  • 5 hours GREEN NEW DEAL = BLIZZARD OF LIES
  • 11 hours U.S. Presidential Elections Status - Electoral Votes
  • 8 hours Severe Drought in the West Will Greatly Reduce Electrical Production from Hydroelectric Turbines.
  • 1 day The Climate Scare Stories Began With Far Left Ideology Per GreenPeace Co-Founder
  • 3 days NordStream2
  • 3 days Beware the Left's 'Degrowth' Movement (i.e. why Covid-19 is Good)
MINING.com

MINING.com

MINING.com is a web-based global mining publication focusing on news and commentary about mining and mineral exploration. The site is a one-stop-shop for mining industry…

More Info

Premium Content

Researchers Are Harvesting Precious Metals From Industrial Waste

Researchers from Kanazawa University in Japan have developed a mechanism to improve the recovery of silver and palladium ions from aqueous acidic waste.

In a paper published in the Chemical Engineering Journal, the scientists said that the process they developed involves chemically modifying ultrasmall particles of cellulose – an abundant and nontoxic biopolymer – to selectively adsorb silver and palladium ions at room temperature. Adsorption was nearly complete at acidic pH with acid concentrations of around 1 to 13% by volume.

“The adsorbent selectively chelated the soft acid silver and palladium cations,” Foni Biswas, lead author of the study, said in a media statement. “Of the 11 competing base metals we tested, only copper and lead cations were also adsorbed, but we removed them with ease.”

According to Biswas, maximum metal ion adsorption was fast compared to other approaches. It took only one hour for silver, a metal that also showed substantially higher maximum adsorption capacities at 11 mmol/g.

After adsorption, the researchers incinerated the cellulose particles to obtain elemental silver or palladium powder. Subsequent higher-temperature incineration converted the powder into pellets. Spectroscopic analyses indicated that the final metal pellets were in metallic rather than oxide form.

“We then removed nearly all of the silver and palladium from real industrial waste samples,” Biswas said. “Obtaining pure and elemental metals proceeded as smoothly as in our trial runs.”

By Mining.com

More Top Reads From Oilprice.com:


Download The Free Oilprice App Today

Back to homepage





Leave a comment

Leave a comment




EXXON Mobil -0.35
Open57.81 Trading Vol.6.96M Previous Vol.241.7B
BUY 57.15
Sell 57.00
Oilprice - The No. 1 Source for Oil & Energy News