Single-step process could improve access to clean water

The team at Nagoya University has made the breakthrough with the single-step process that is described in ACS Applied Nano Materials.

Australian nanofilter promises rapid access to clean water

Various nanocarbons are being studied and used for purifying water and wastewater by adsorbing dyes, gases, organic compounds and toxic metal ions. These nanocarbons can adsorb heavy metal ions, like lead and mercury, onto their surfaces through molecular attraction forces. But this attraction is weak, and so they aren't very efficient adsorbents on their own.

To improve adsorption, scientists are said to be considering adding molecules to the nanocarbons, like amino groups, that form stronger chemical bonds with heavy metals. They are also trying to find ways to use all available surfaces on nanocarbons for metal ion adsorption, including the surfaces of their inner pores. This would enhance their capacity to adsorb more metal ions at a time.

Materials scientist Nagahiro Saito of Nagoya University's Institute of Innovation for Future Society and colleagues developed a new method for synthesising an "amino-modified nanocarbon" that more efficiently adsorbs several heavy metal ions compared to conventional methods.