- Write by:
-
Tuesday, December 22, 2020 - 12:20:14 PM
-
619 Visit
-
Print
Mining News Pro - 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.”
Short Link:
https://www.miningnews.ir/En/News/609830
A Russian arbitration court ruled on Monday that four units of Swiss commodities trader Glencore will pay more than 11.4 ...
A prefeasibility study for Predictive Discovery’s (ASX: PDI) Bankan gold project in Guinea gives it a net present value ...
Vietnam’s top miner Vinacomin plans to invest 182 trillion dong ($7.3 billion) to ramp up its alumina-aluminum ...
Rare earths prices in top producer China jumped to their highest in more than seven weeks on Monday on a wave of ...
Indonesia’s mining minister on Wednesday said divestment of Vale Canada Ltd and Sumitomo Metal Mining Co. Ltd’s shares ...
Chinese coal prices are likely to keep falling until the start of the peak summer season, suppressing imports of the ...
Canadian miner Teck Resources has agreed to pay Korea Zinc $165 per metric ton, a three-year low, to turn its zinc ...
Nippon Steel intends to pursue its proposed acquisition of US Steel and wants its “deep roots” in the United States to ...
Russia will regularly buy diamonds from sanctions-hit producer Alrosa through a state fund, the finance ministry said on ...
No comments have been posted yet ...