Abstract:
The formation of bromate (BrO3
−)in groundwater treatment is still a severe environmental
problem. Catalytic hydrogenation by nanoscale heterogeneous catalysts with gaseous H2 or solid state H2 has emerged as a promising approach, which relies on reducing BrO3
− to innocuous Br−
via the process of direct electron transfer or reduction with atomic hydrogen. Several nanocatalysts
have demonstrated high efficiency with a 100% effective BrO3
− reduction with greater than 95%
of Br− generation in the batch and continuous reactors. However, this technology has not been
widely adopted in water treatment systems. Indeed, this research article summarizes the advantages
and disadvantages of these technologies by highlighting the factors of nanomaterials reduction
efficiency, long-term durability, and stability, as well as addressing the essential challenges limiting
the implementation of the use of H2
for BrO3
− reduction. In this work, we provide an economic
evaluation of catalytic BrO3
− removal, safe hydrogen supply, storage, and transportation.