I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment PDF Processing & Handling

CNT-enhanced membranes show promise for desalination method

By Scott Jenkins |

By immobilizing carbon nanotubes (CNTs) within polymer membrane pores, scientists at the New Jersey Institute of Technology (NJIT; Newark, N.J.; www.njit.edu) were able to significantly improve the efficiency of desalination via a membrane distillation process. Somenath Mitra and colleagues at NJIT used a vacuum to force a dispersion of CNTs into the pore network of commercially available polymer membranes. The result is a uniform distribution of 0.5-wt.% multiwalled CNTs in the membrane. The scientists found that, compared to the membrane alone, flux doubled and salt reduction was five times higher with the CNT-infused membrane. The result could allow the use of membrane distillation for purifying brackish and seawater as a lower-energy alternative to reverse osmosis and other thermal and chemical desalination methods. In testing the CNT-infused membranes with solutions of salt water from 10 to 34,000 mg/L, the NJIT team observed “significantly higher flux and salt reductions at all feed flowrates” and mass transfer coefficients that were two to six times higher in the presence of CNTs. In a recent paper, Mitra and the other NJIT scientists proposed that the CNTs alter the water-membrane interactions such that a higher…
Related Content

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
Make your chemical centrifuge ready for the future
Securing the availability of chemical processes through a long-term partnership
Metering gas in biogas plants
The Big 6 level measurement technologies: Where to use them and why
Minimizing particle breakage and mother liquor residue in technical salts production

View More