Abstract：Removal of trace N-Nitrosodimethylamine (NDMA) using nanoscale zero-valent iron (NZVI) was studied as a potential technology. Effects of dissolved oxygen, initial concentration of NZVI, initial NDMA concentration, pH and temperature on the degradation of NDMA was investigated. NDMA was effectively removed by NZVI from deoxygenated solution under neutral condition, while the removal of NDMA was limited using common commercial iron powders. The removal rate increased with the increase of initial NZVI dosage, while the effect of initial NDMA concentration is not remarkable. Lower pH and higher temperature facilitated the reduction of NDMA with NZVI. There existed a lag period for the reduction of NDMA and the lag time was influenced by pH and temperature. When NZVI was pre-activated in water for 12h, the removal rate of NDMA was sharply improved. The main degradation products were DMA and NH4+; other products, such as UDMH, need further investigation.
杨娟, 李咏梅. 纳米零价铁去除水中微量N-亚硝基二甲胺的研究[J]. 中国环境科学, 2014, 34(7): 1696-1702.
YANG Juan, LI Yong-Mei. Removal of trace n-nitrosodimethylamine using nanoscale zero-valent iron. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(7): 1696-1702.
