Elucidation of the last steps of photo-ammonification:analytical method development and mechanism elucidation  

作　　者：Yingjing Miao Hui Wang Chunpeng Yang Ruochun Zhang Hao Zhang Peizhe Sun 

机构地区：[1]School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China [2]SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083,China [3]School of Earth System Science,Tianjin University,Tianjin 300072,China

出　　处：《Frontiers of Environmental Science & Engineering》2024年第8期101-106,共6页环境科学与工程前沿（英文）

基　　金：supported by the project from the National Natural Science Foundation of China(Nos.52100110 and 42177197);the Natural Science Foundation of Tianjin(China)(No.22JCYBJC00270).

摘　　要：The mechanisms underlying the photo-ammonification of nitrogenous organic compounds(NOCs)remain unclear,partly due to the analytical challenges of small NOC intermediates.This study introduced a simple methodology for accurately and simultaneously quantifying multiple small NOCs during ammonification processes.The developed method employed phenyl isothiocyanate as derivatization reagents,followed by high-performance liquid chromatography analysis to measure primary and secondary amines,amides,as well as NH4+over variable photo-ammonification conditions.In our experimental setup,vacuum ultraviolet(VUV)irradiation serves as the controlled reaction environment to simulate harsh photo-ammonification environment.Representative NOCs,including pyridine,N,N-dimethylformamide,and acrylonitrile,were chosen due to their structural diversity and environmental relevance as model NOCs.This method was able to achieve excellent nitrogen mass balance,and revealed that the last steps of photo-ammonification involved oxidation of nitrogen-adjacent carbon to amide followed by the cleavage of N-C bond.This novel method may also help quantitative investigation of nitrogen transformations in different environmental contexts.

关 键 词：AMMONIFICATION NOCs AMINES Nitrogen mass balance 

分 类 号：X51[环境科学与工程—环境工程]