White Graphene: The New Supermaterial That Sucks Up Pollution
https://gizmodo.com/white-graphene-the-new-supermaterial-that-sucks-up-pol-486193446
A very good article:
Removal of heavy metals and pollutants by membrane adsorption techniques Graphene
https://link.springer.com/article/10.1007/s13201-018-0661-6
RE: Researchers have created a "graphene sieve" that removes salt from seawater