There are great challenges to find new and innovative ways to filter arsenic from drinking water in a cost-effective and reliable manner. In this work, we investigated reduced graphene oxide-based filtration membranes to remove arsenic salt from water with forward osmosis (FO). Highly stable reduced graphene oxide membranes were synthesized by vacuum filtration, followed by thermally annealing. The filtration performance of the membranes for arsenic removal in water was evaluated with arsenate solution as a feed solution and 2 M sucrose solution as a draw solution. The filtration efficiency was measured using UV-visible absorption and electric conductivity measurements. The data at the 30 min FO test were used for analysis. For electric conductivity-based concentration determination, a standard curve of arsenate in a series of concentrations in 2 M sucrose was established, allowing to estimate the arsenate concentration in the sucrose draw solution. A rejection rate &gt;98% was obtained. Our current work may provide a promising way to remove arsenic from drinking water.

Removal of arsenic from drinking water using reduced graphene oxide-based filtration membranes

ACS Spring 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.