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  • Title: A critical review of nitrate reduction by nano zero-valent iron-based composites for enhancing N2 selectivity.
    Author: Pei Y, Chen J, Cheng W, Huang W, Liu R, Jiang Z.
    Journal: Dalton Trans; 2024 Oct 08; 53(39):16134-16143. PubMed ID: 39264277.
    Abstract:
    Due to the highly reductive capacity of nano zero-valent iron (nZVI) nanoparticles, the reduction of nitrate (NO3--N) is prone to produce ammonia nitrogen (NH4+-N) as a by-product and has low selectivity for nitrogen gas (N2). Water and dissolved oxygen (DO) in the solution consume electrons from nZVI, decreasing the efficiency of NO3--N reduction. In order to overcome the drawbacks of plain nZVI being used to remove NO3--N pollution, nZVI-based multifunctional materials have been constructed to realize the selective conversion of NO3--N to N2 as well as the efficient removal of NO3--N. Therefore, advanced research on the reduction of NO3--N by nZVI-based composites has been comprehensively reviewed. Strategies to improve NO3--N reduction efficiency and N2 selectivity are proposed. Moreover, the shortcomings of iron-based nanomaterials in NO3--N pollution control have been summarized, and some suggestions for future research directions provided.
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