摘要
对铁 (Ⅲ ) 草酸盐配合物光解过程中产生的·OH进行了气相色谱法间接测定 在pH =3 5 ,异丙醇浓度为 1mmol·l- 1的条件下 ,经过 1 2 5W高压汞灯 (λ≥ 31 3nm)光照 80min ,Fe(Ⅲ ) /草酸盐配比为 9 3/1 2 0 7μmol·l- 1的水溶液中 ,·OH的生成量为6 5 9μmol·l- 1,·OH生成反应符合表观零级反应动力学模式 ,其生成速率为 0 72 6μmol·l- 1·min- 1.同时蜒究了溶液pH值、Fe(Ⅲ ) /草酸盐配比对·OH生成量的影响 .
By using 2-propanol as scavenger to produce acetone, the hydroxyl radical(·OH) produced by photolysis of Fe(Ⅲ)-oxalato complexes was determined with GC/FID.In the solution containing 9.3/120.7μmol·l -1 Fe(Ⅲ)/oxalate and 1mmol·l -1 2-propanol at pH 3.5,65.9μmol·l -1·OH produced after irradiation by 125W high pressure mercury lamp(λ≥313nm) for 80 minutes. Hydroxyl radical generation kinetics follows pseudo-zero-order reaction model with a rate of 0.726μmol·l -1·min -1.Effects of pH,and Fe(Ⅲ)/oxalate ratio on ·OH generation were exami- ned.
出处
《环境化学》
CAS
CSCD
北大核心
2002年第1期87-91,共5页
Environmental Chemistry
