I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical EngineeringChementator briefs
Isononyl alcohol Last month, Dow, Inc. (Midland, Mich.; www.dow.com) and…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUS
Focus on Temperature
The world’s first temperature transmitter with Bluetooth Last November, this…
NEW PRODUCTS + Show More

Comment Water Treatment

Filtering out and detoxifying hexavalent chromium from water

By Gerald Ondrey |

Chemists from the Swiss Federal Institute of Technology Lausanne (EPFL; Switzerland; www.epfl.ch) have developed “sponges” designed to capture various target substances, such as gold, mercury and lead, dissolved in solution. Now, they have developed one for capturing toxic hexavalent chromium from water. The material — a composite bead of a metal organic framework (MOF) on a polymer — not only has a high adsorption capacity for Cr(VI), but it also acts as a photocatalyst, whereby the Cr(VI) is converted to the less toxic Cr(III). As described in an article published last month in the Journal of Materials Chemistry A, the adsorbent sponge is made by first functionalizing a known Zr-MOF, UiO-66, with double amino groups. This modification permits the new material, Zr-BDC-(NH2)2, to serve a dual-purpose as both adsorbent and photocatalyst, according to the chemists. Next, Zr-BDC-(NH2)2 was incorporated into MOF@polymer beads using polyethersulfone (PES) that was chemically modified with carboxylic acid groups to improve hydrophilicity. The researchers have demonstrated that the MOFs can extract approximately 208 mg of Cr(VI) per gram of MOF [photo before (left) and after (right)]. Also, shining light on the loaded MOF then transforms…
Related Content
A powerful tool to analyze MOFs
An international team, including staff from the Korea Advanced Institute of Science and Technology (Kaist; Daejeon, South Korea; www.kaist.ac.kr), led…
A sound way to make MOFs
Researchers from RMIT University (Melbourne, Australia; www.rmit.edu.au) have demonstrated a “green” technique that can produce customized metal organic framework (MOF)…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
The Big 6 level measurement technologies: Where to use them and why
ABB in Chemical Industry
6 benefits to expect from a measurement partner
Expect more from your measurement with ABB
Wet process analyzer for FPD and solar cell manufacturing for semi-conductors

View More