The use of constructed wetlands for wastewater treatment is rapidly increasing worldwide due to their advantages of low operating and maintenance costs. Denitrification in constructed wetlands is dependent on the presence of organic carbon sources, and the shortage of organic carbon is the primary hurdle for nitrate removal. Therefore, the use of inorganic electronic donors has emerged as an alternative. This paper provides a comprehensive review of nitrate removal pathways using various inorganic electron donors and the performance and development of autotrophic denitrification in constructed wetlands. The main environmental parameters and operating conditions for nitrate removal in wetlands are discussed, and the challenges currently faced in the application of enhanced autotrophic denitrification wetlands are emphasized. Overall, this review illustrates the need for a deep understanding of the complex interrelationships among environmental and operational parameters and wetland substrates for improving the wastewater treatment performance of constructed wetlands.

由于其低廉的运营和维护成本的优势，人工湿地在废水处理中的使用正在迅速增加。人工湿地的反硝化取决于有机碳源的存在，而有机碳的短缺是去除硝酸盐的主要障碍。因此，已经出现了使用无机电子供体的替代方案。本文全面综述了使用各种无机电子给体的硝酸盐去除途径以及人工湿地中自养反硝化的性能和发展。讨论了在湿地中去除硝酸盐的主要环境参数和操作条件，并强调了在增强自养反硝化湿地应用中目前面临的挑战。总体，