三价铜络合物降解萘普生:一种高效的氧化剂

三价铜络合物降解萘普生:一种高效的氧化剂

For the first time, non-steroidal anti-inflammatory drug naproxen (NPX) was degraded by trivalent copper (Cu(Ⅲ)), and the influencing factors, active species and toxicity of the degradation of NPX by Cu(Ⅲ) were investigated. The results showed that at pH = 7.0 and after a reaction for 5 minutes, 0.1 mmol/L of Cu(Ⅲ) degraded 80% of NPX, and the degradation rate increased with the increase of the concentration of Cu(Ⅲ); the free radical quenching experiment indicated that Cu(Ⅲ) in the system was the main active species; Cu(Ⅲ) was difficult to exist under acidic conditions, and the intensity of the characteristic peak of Cu(Ⅲ) increased with the increase of pH; Cl~-, HCO_3~- and HA had no obvious effect on the degradation of NPX; the TOC value of the system gradually decreased with the progress of the reaction, and the acute biological toxicity of the intermediate degradation products of NPX was lower than that of NPX; in addition, it was推测 that Cu(Ⅲ) is a one-electron oxidant and has a good oxidation effect on pollutants with an electron-rich structure.

首次利用三价铜(Cu(Ⅲ))降解非甾体抗炎药萘普生(NPX),探讨了Cu(Ⅲ)降解NPX的影响因素、活性种类及毒性研究。结果表明,pH=7.0,反应5 min时,0.1 mmol/L的Cu(Ⅲ)降解了80%的NPX并且降解率随Cu(Ⅲ)浓度增加而增大;自由基猝灭实验表明体系中Cu(Ⅲ)为主要活性物种;酸性条件下Cu(Ⅲ)难以存在,并且Cu(Ⅲ)特征峰强度随pH的增大而增大;Cl~-、HCO_3~-和HA对NPX的降解无明显影响;体系TOC值随着反应的进行逐渐降低,并且NPX的中间降解产物的急性生物毒性要低于NPX;另外推测Cu(Ⅲ)是一种单电子氧化剂,对具有富含电子结构的污染物具有良好的氧化效果。