Imidacloprid (IMI) was reduced by zero valent aluminum (ZVAl) in adkaline condition and tested by high performance liquid chromatography (HPLC). The effect of NaOH concentration

reactive time and temperature on IMI removal rate were investigated. The IMI removal rate was heavily dependent on NaOH concentration

reaching 27.4%-100% with NaOH concentration from 0.5 to 100.0 mmol·L-1 and 5 g·L-1 ZVAl. The reaction process was very fast

leading to higher degradation rate in very short time and achieving 46.3% for only 0.5 h and 88.0% for 4 h in IMI solution with NaOH concentration of 2.5 mmol·L-1 and 5 g·L-1 ZVAl. IMI removal rate slightly increased with temperature

reaching from 40.0% to 47.1% at temperature from 20 to 40℃ with NaOH concentration of 1.0 mmol·L-1

and reaching from 56.3% to 62.3% at temperature from 20 to 40℃ with NaOH concentration of 1.5 mmol·L-1. The transformation products were analyzed by high performance liquid chromatography mass spectrometer (HPLC-MS). It was found that 1-(4-chlorobenzyl)-N-nitrnsomidazolidin-2-imine

1-(6-chloro-3-pyridine methyl)-2-imidazole

2-chloro-5-ethyl pyridine and 2-chloro-5-methyl pyridine were produced during the reduction process of IMI by ZVAl in alkaline condition.