NOX (X=1 or 2) emitted from stationery/mobile sources are conventionally deemed as notorious, anthropogenic precursors of ultrafine particulate matters (PM2.5) because NOX can undergo a series of SO2-assisted photochemical transformative stages to finally evolve PM2.5 functioning as an air pollutant. Recently, a research group in South Korea rectifies the general notion of NOX (vide supra) by proposing an interesting means to exploit NOX in creative fashion.
The Korea Institute of Science and Technology (KIST) has announced that a KIST research group with principal investigators of Dr. Jongsik Kim and Dr. Heon Phil Ha has collaborated with a research team led by Prof. Keunhong Jeong in the the Korea Military Academy (KMA) to graft NO3- species on a metal oxide via chemical fusion between NOX and O2 under a low thermal energy ( 150 C). The resulting supported NO3- species can then be radicalized to generate NO3• analogues that serve as degraders of refractory organic substances present in a wastewater.
Aqueous recalcitrant compounds including phenolics and bisphenol A are typically eliminated from water matrices via sedimentation with the use of coagulants or via degradation into H2O and COY (Y=1 or 2) with the injection of OH shuttles such as H2O2, O3, etc. However, these methods require additional stages to recover coagulants or suffer from short lifespans and/or chemical instabilities innate to •OH, H2O2, and O3, thus severely limiting the sustainability of H2O...
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