铁配合物/过氧化氢体系降解苯酚的影响因素

Influencing factors of phenol degradation with iron complex /hydrogen peroxide system

酚类广泛存在于印染等企业废水中,属于难降解有毒有机污染物,环境危害巨大。文章选择大环铁金属配合物/过氧化氢体系降解苯酚,采用控制变量法研究了体系的各种影响因素,如p H值、催化剂浓度、双氧水浓度、温度和时间等。研究确定苯酚降解的最佳工艺条件:在室温条件下,双氧水的浓度2.6×10-4mol/L,催化剂的浓度2×10-7mol/L,p H值为11.5时,催化降解30 min即可使苯酚降解率达到99.93%。

Phenols are widely present in the printing and dyeing enterprises wastewater belonging refractory toxic organic pollutants, environmental damage is huge. In this paper, it choose a large ring of iron metal complex/hydrogen peroxide system to degradate the phenol, it studied a variety of factors of the system, such as pH value, catalyst concentration, hydrogen peroxide concentration, temperature and time. By the research, we obtained the optimum conditions of phenol degradation： 2.6 ×10^-4 mol/L of the hydrogen peroxide, 2 × 10^-7 mol/L of the catalyst, pH value 11.5, room temperature and 30 minutes for the reaction. Utilizing above conditions, the degradation rate of phenol can reach to 99.93 %.