【摘要】 以大容量空气总悬浮微粒采样器采集了大气气溶胶样品,以石英滤膜为载体,研究了气溶胶中的多环芳烃(PAHs)在紫外光照条件下的光降解规律。结果表明,气溶咬中的多环芳烃在紫外光照下发生迅速的降解;其光降解反应为一级反应,光降解速率常数与它们的极谱氧化半波电位及化合物结构有关,而与降解温度关系不明显。更多还原

【Abstract】 Ultraviolet photodegradation of PAHs in atmospheric aerosols sorbed on quartz filter has been observed in detail. The photodegradation of PAHs was first - order recreation. The photodegradation rate constants (k) and half- lives (t \, :) were determined in ultraviolet light of 253.7nm. The relations between the photodegradation rate constants, temperature and the oxidation- half- wave potential (E1/2) and the structure of PAHs were discussed.更多还原