摘要
本论文选用了偶氮染料ARR为主要研究对象,研究它在UV-类Fenton体系中的光催化降解行为。采用紫外杀菌灯(λ≥254 nm)为光源,光化学反应实验在自制的光催化反应装置中进行。光照反应时间50 min,间隔相同时间取样,采用分光光度法检测ARR在光催化降解过程中的浓度变化,系统地研究了ARR的初始浓度、反应体系pH值、蒙脱土/H_(2)O_(2)配比、以及NO_(3)^(-)、EDTA、Cl^(-)、丙酮酸钠等对偶氮染料ARR光催化降解的影响。结果表明:在pH=3.0、66 mg/L的30%H_(2)O_(2)和浓度为1 g/L的蒙脱土条件下,ARR在UV-类Fenton体系可以获得较高的反应速率,NO_(3)-、丙酮酸钠对ARR的光催化降解有促进作用,而Cl^(-)、EDTA对ARR的光催化降解有抑制作用。
In this paper,azo dye-acid red r was used as the chief research object,the photodegradation behavior in the uv-classfenton system was studied.Uv light(λ≥254 nm)was used as the light source,photochemical reactions experiments were performed in self-regulating photocatalytic reactor.The photochemical reaction time was 50 min.At different time intervals during the irradiation,the concentrations of acid red r was determined with spectrophotometric method during the process of photocatalytic degradation.The effects of initial concentration,pH,Fe^(3+)/H_(2)O_(2) ratio and several anions,such as NO_(3)^(-),EDTA,Cl^(-),sodium pyruvate on photocatalytic degradation of the acid red r were studied systematically.The results showed that the higher reaction rates were obtained in the uv-like Fenton system under the condition of pH=3.0 and 66 mg/L of 30%H_(2)O_(2),and the concentration of 1 g/L of montmorillonite can enhance the photocatalytic degradation of acid red r is promoted by NO3-and sodium acetate,however,EDTA、Cl-have an inhibit role.
作者
李承政
Li Chengzheng(Wuchuan City Environmental Protection Monitoring Station,Zhanjiang 524500,China)
出处
《广东化工》
CAS
2023年第21期96-98,共3页
Guangdong Chemical Industry
