Pei Yanyan, Chen Junlan, Cheng Wei, Huang Wenzhong, Liu Renyu, Jiang Zhuwu
College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian, 350118, China.
Fujian Provincial Institute of Architectural Design and Research Co., Ltd, Fuzhou, Fujian 350001, China.
Dalton Trans. 2024 Oct 8;53(39):16134-16143. doi: 10.1039/d4dt02052a.
Due to the highly reductive capacity of nano zero-valent iron (nZVI) nanoparticles, the reduction of nitrate (NO-N) is prone to produce ammonia nitrogen (NH-N) as a by-product and has low selectivity for nitrogen gas (N). Water and dissolved oxygen (DO) in the solution consume electrons from nZVI, decreasing the efficiency of NO-N reduction. In order to overcome the drawbacks of plain nZVI being used to remove NO-N pollution, nZVI-based multifunctional materials have been constructed to realize the selective conversion of NO-N to N as well as the efficient removal of NO-N. Therefore, advanced research on the reduction of NO-N by nZVI-based composites has been comprehensively reviewed. Strategies to improve NO-N reduction efficiency and N selectivity are proposed. Moreover, the shortcomings of iron-based nanomaterials in NO-N pollution control have been summarized, and some suggestions for future research directions provided.
由于纳米零价铁（nZVI）纳米颗粒具有高度的还原能力，硝酸盐（NO-N）的还原容易产生副产物氨氮（NH-N），并且对氮气（N₂）的选择性较低。溶液中的水和溶解氧（DO）会消耗nZVI中的电子，降低NO-N还原效率。为了克服普通nZVI用于去除NO-N污染的缺点，已构建了基于nZVI的多功能材料，以实现NO-N向N₂的选择性转化以及NO-N的高效去除。因此，对基于nZVI的复合材料还原NO-N的前沿研究进行了全面综述。提出了提高NO-N还原效率和N₂选择性的策略。此外，总结了铁基纳米材料在NO-N污染控制中的缺点，并为未来的研究方向提供了一些建议。
