硫酸铁改性活性炭催化微波降解甲基对硫磷

在硫酸铁改性活性炭存在下，微波照射能使溶液中的甲基对硫磷迅速降解。对25、100mg／L的甲基对硫磷溶液，改性活性炭0．4g／L，微波照射3．0min，降解率达77．18％。适当提高改性活性炭加入量，同样照射时间即可达96．90％。而采用未改性活性炭甲基对硫磷降解率为93．20％。结果表明，微波照射下改性活性炭的催化活性明显高于未改性活性炭。另外，采用紫外．可见光谱和离子色谱技术探讨了微波照射时间、甲基对硫磷初始浓度和酸度、活性炭用量、改性液硫酸铁浓度和酸度对改性活性炭催化微波降解甲基对硫磷的影响。

Investigation on Microwave Degradation of Parathion-methyl in the Presence of Modified Active Carbon Catalyst with Ferric Sulfate

Parathion-methyl can be degraded rapidly under microwave irradiation in the presence of modified active catalyst with ferric sulfate. The degradation ratio reached 77.18% for 25 mL parathion-methyl solution of 100 mg/L and modified active carbon of 0.4g/L under 3.0 rain microwave irradiation. Under the same microwave irradiation, the degradation ratio reached 96.90 % by appropriate increasing addition amount of modified active carbon, while the degradation ratios was 93.20 % using unmodified active carbon under the same conditions. The results showed catalysis active of the modified active carbon was obviously better than that of unmodified active carbon under microwave irradiation. Otherwise, the effects of microwave irradiation time, initial concentration and acidity of parathion-methyl, addition amount of modified active carbon and concentration and acidity of ferric sulfate modified solution on microwave degradation of parathion-methyl in the presence of modified active carbon catalyst were discussed adopting UV-vis spectrum and ion chromatography technologies.