紫外/高铁酸盐耦合体系降解水中四种类固醇激素的研究

Degradation of four steroid hormones in aqueous solution by UV/ferrate coupling system

研究了UV/Fe(Ⅵ)耦合体系对水中类固醇激素污染物的降解,考察了Fe(Ⅵ)浓度、pH、无机离子及溶解性有机质对降解污染物的影响.结果表明:与单独使用UV和Fe(Ⅵ)相比,UV/Fe(Ⅵ)耦合体系效率更高,由于UV活化Fe(Ⅵ)后加速分解产生了氧化性更强的Fe(Ⅳ)和Fe(Ⅴ)来降解污染物.在Fe(Ⅵ)浓度为0.8 mmol·L^(-1)时,pH值为5.0~11.0的中性和碱性条件下,UV-254 nm光照40 min后四种类固醇激素污染物降解率均达到87.9%以上,环境水体中常见无机离子对UV/Fe(Ⅵ)体系降解污染物无显著影响,但高浓度溶解性有机质有一定抑制作用.说明UV/Fe(Ⅵ)耦合体系是一种具有良好应用前景的去除含类固醇激素污染物的水处理方法.

The degradation of steroid hormone pollutants in water by UV/Fe(Ⅵ)coupling system was studied.The effects of Fe(Ⅵ)concentration,pH,inorganic ions and dissolved organic matter on pollutant degradation were examined.The results demonstrated that the UV/Fe(Ⅵ)coupling system had higher efficiency compared with using UV and Fe(Ⅵ)alone,mainly due to the accelerated decomposition of Fe(Ⅵ)by UV activation and generation of more oxidative species of Fe(Ⅳ)and Fe(Ⅴ).The removal rate of four steroid hormones contaminants were over 87.9%within 40 minutes under UV-254 nm illumination with 0.8 mmmol·L^(-1) of Fe(Ⅵ)under neutral and alkaline condition with pH values of 5.0~11.0.The common inorganic ions in environmental water exhibited no significant effects on the degradation of contaminants by UV/Fe(Ⅵ)system.However,high concentrations of dissolved organic matter had a certain inhibitory effect.It is shown that UV/Fe(Ⅵ)coupling system is a promising water treatment method for removing steroid hormone pollutants.