Pulling Iron Out of Waste Printer Toner
News Nov 16, 2017 | Original Story from the American Chemical Society.
Someday, left-over toner in discarded printer cartridges could have a second life as bridge or building components instead of as trash, wasting away in landfills and potentially harming the environment. One group reports in ACS Sustainable Chemistry & Engineering that they have devised a method to recycle the residual powder in “empty” cartridges into iron using temperatures that are compatible with existing industrial processes.
Electronic waste is a broad category that encompasses everything from computers and televisions to ink cartridges and refrigerators. According to the European Toner and Inkjet Remanufacturers Association, 500 million cartridges out of the estimated 1.1 billion sold each year end up in landfills around the world. These “empty” cartridges can contain up to 8 percent of unused residual powder by weight and could leach compounds into the soil and underground water sources. In an attempt to reuse this electronic waste, researchers have transformed this substance into oils, gases and even an ingredient in asphalt. Now, Vaibhav Gaikwad and colleagues wanted to develop a brand-new way to re-use residual toner.
The researchers put toner powder in a furnace, heating it to 1,550 °C. This process converted the inherent iron oxide to a product that was 98 percent pure iron using the polymer resins within the toner powder as a source of carbon. The researchers say that this method would be ideal for industrial applications because iron and steel are typically made at this temperature. In addition, heating the powder at such a high temperature prevents toxic side products from forming, providing an environmentally friendly way to recycle residual toner.
This article has been republished from materials provided by the American Chemical Society. Note: material may have been edited for length and content. For further information, please contact the cited source.
Thermal Transformation of Waste Toner Powder into a Value-Added Ferrous Resource. Vaibhav Gaikwad, Uttam Kumar, Farshid Pahlevani , Alvin Piadasa, and Veena Sahajwalla. ACS Sustainable Chem. Eng. October 25, 2017 DOI: 10.1021/acssuschemeng.7b02875.
Forensic Analysis Sheds Light on Ligament InjuriesNews
A team have used a forensic approach to reconstruct injuries by examining bone bruises on the knees of 15 men and 15 women with torn anterior cruciate ligaments (ACL). This showed while women are two to four times more likely than men to tear the ACL in their knee, the cause of this injury is no different between the sexes.READ MORE
Strong Immune Response Linked to Stunted Growth in ChildrenNews
An overactive immune system during childhood among young people in Ecuador’s indigenous Shuar population comes with a cost: stunted growth.READ MORE
Comments | 0 ADD COMMENT
15th Symposium on the Practical Applications of Mass Spectrometry in the Biotechnology Industry
Sep 09 - Sep 12, 2018
CE in the Biotechnology & Pharmaceutical Industries: 20th Symposium on the Practical Applications for the Analysis of Proteins, Nucleotides & Small Molecules
Sep 09 - Sep 12, 2018