摘要
在模拟日光辐射下,文章研究了内分泌干扰物壬基酚(NP)在H_2O_2溶液和Fe(Ⅲ)-H_2O_2溶液体系中的光降解现象,探讨了光照距离、H_2O_2浓度、Fe(Ⅲ)浓度等对NP光降解的影响。结果表明:NP直接光降解率较低,10mg/LNP光照240min降解率仅为4.2%;加入H_2O_2对NP光降解起促进作用,且在一定范围内随H_2O_2浓度增加,降解率增大,H_2O_2浓度为1.0mmol/L时,NP降解率达到70.5%;Fe(Ⅲ)对NP在H_2O_2体系中光解起协同作用,随Fe(Ⅲ)浓度增大,降解率增大,当Fe(Ⅲ)浓度为1.0mmol/L时,NP的降解率达到90.2%。动力学研究结果表明:NP光降解过程遵循一级动力学,相关系数大于0.987。
In this paper,the phenomena of photo-induced degradation of endocrine disruptor named nonylphenol （NP） in H2O2 solution and Fe（Ⅲ ）-H2O2 solution were studied under a simulated sunlight.The effects of the concentrations of H2O2 and Fe（Ⅲ ） solutions and the distance of illumination on photodegradation of NP were discussed.The results showed that the degradation rate of NP under a direct photolysis was very low,and the degradation rate of 10 mg/L of NP was only 4.2% after 240-minute irradiation.With addition of H2O2,the degradation rate of NP increased.With increase of the concentration of H 2O 2 in a certain range,the degradation rate of NP also increased.When the concentration of H2O2 was 1.0 mmol/L,the degradation rate of NP reached to 70.5%.Fe（Ⅲ ） had the synergistic effect on degradation of NP within the H2O2 system.With the increase of the concentration of Fe（Ⅲ） in H2O2 solution,the degradation rate of NP increased.When the concentration of Fe（Ⅲ） was 1.0 mmol/L,the degradation rate of NP reached to 90.2%.The results from kinetic study showed that the process of photodegradation of NP could be well described by the first-order reaction model with the correlation coefficients exceeding 0.987.
出处
《环境保护科学》
CAS
2017年第6期49-54,共6页
Environmental Protection Science
关键词
内分泌干扰物
壬基酚
过氧化氢
光降解
Endocrine Disruptor
Nonylphenol
Hydrogen Peroxide
Photodegradation
