硅铁合金催化臭氧氧化水中布洛芬

近几年,在各地的饮用水中不断检测到微量布洛芬,其环境毒性引起了广泛关注。选用工业硅铁作为催化剂,催化臭氧氧化去除水中的布洛芬,并通过单因素试验,确定了反应体系的最佳条件。结果表明,在硅铁的作用下,催化臭氧氧化可以明显提高布洛芬的去除率。在硅铁投加量为1 g/L、水溶液初始pH值为8、臭氧浓度9.0 mg/L、布洛芬初始浓度为10 mg/L时,经过80 min,水样总有机碳(TOC)的去除率可达75.5%,较单独臭氧氧化提高了38.0%。将碳酸氢钠作为自由基抑制剂加入反应体系,可明显降低TOC的去除率,间接证明了催化臭氧氧化布洛芬的反应遵循自由基机理。

Catalitic Ozonation of Ibuprofen in Water by Ferrosilicon Alloy

In recent years,micro-ibuprofen has been continuously detected in drinking water from place to place,and its environmental toxicity has caused widespread concern.Industrial ferrosilicon was used as catalyst to catalyze ozone oxidation to remove ibuprofen from water,and the optimal conditions of the reaction system were determined by single factor test.The results showed that under the activation of ferrosilicon,catalytic ozone oxidation could significantly improve the removal rate of ibuprofen.When the dosage of ferrosilicon was 1 g/L,the initial pH value of the aqueous solution was 8,the ozone concentration was 9.0 mg/L,and the initial concentration of ibuprofen was 10 mg/L,after 80 minutes reaction,the removal rate was up to 75.5%,which was 38.0%higher than ozone oxidation alone.Adding sodium bicarbonate as free radical inhibitor to the reaction system could significantly reduce the removal rate of TOC,and this indirectly proved that the catalytic ozonation of ibuprofen follows the free radical mechanism.