负载型银掺杂二氧化钛光催化降解盐酸四环素特性研究

发布时间：2018-03-14 11:29

本文选题：可见光　切入点：二氧化钛　出处：《环境与健康杂志》2017年09期 　论文类型：期刊论文

【摘要】：目的探讨负载于多孔海绵上银掺杂二氧化钛(Ag-二氧化钛)可见光光催化剂对盐酸四环素(TCH)的降解特性。方法以小型内循环流化床反应装置研究在不同光源(LED灯、紫外光灯和氙灯)、催化剂投加量(1.0~2.5 g/L)、TCH初始浓度(25~100 mg/L)和溶液初始p H值(3~11)时,负载型Ag-二氧化钛可见光催化反应在3 h内对TCH降解性能的影响。结果在不同光源条件下,TCH的降解呈表观一级反应,且表观速率常数在LED灯(42 W)为光源时最大。在优化的光催化反应条件(盐酸四环素初始浓度为50 mg/L,p H 5.2,催化剂投加量为2 g/L)下,负载Ag-二氧化钛对TCH的去除率高达92.1%。结论在本实验条件下,负载型Ag-二氧化钛于可见光下光催化处理抗生素类废水具有较好的降解效果,值得进一步深入讨论。
[Abstract]:Objective to investigate the degradation of tetracycline hydrochloride (TCHH) by silver doped titanium dioxide (Ag-TiO _ 2) photocatalyst loaded on porous sponge. Methods LED lamps with different light sources were studied in a small scale inner circulating fluidized bed reactor. UV lamp and xenon lamp, when the catalyst dosage is 1.0 ~ 2.5 g / L, the initial concentration of tch is 25 ~ 100 mg / L, and the initial pH value of solution is 3 ~ (11)), The effect of supported Ag- TIO _ 2 photocatalytic reaction on the degradation of TCH within 3 h. Results the degradation of tch was an apparent first-order reaction under different light sources. The apparent rate constant was maximum when LED lamp was used as the light source. Under the optimized photocatalytic reaction conditions (the initial concentration of tetracycline hydrochloride was 50 mg / L / L H 5.2, the amount of catalyst was 2 g / L), the maximum rate constant was obtained when the initial concentration of tetracycline hydrochloride was 50 mg / L and the amount of catalyst added was 2 g / L, respectively. The removal rate of TCH was up to 92.1.Conclusion under the condition of this experiment, the photocatalytic treatment of antibiotic wastewater with loaded Ag TIO _ 2 has a good degradation effect, which deserves further discussion.
【作者单位】：吉林化工学院资源与环境工程学院;吉林大学环境与资源学院;
【基金】：吉林省科技厅自然科学基金(20150101093C)
【分类号】：O643.36;O644.1;X703

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