Fe-PG紫外光辅助活化H_(2)O_(2)流化床高效降解水杨酸  

Highly efficient degradation of salicylic acid by the Fe-PG UV-assisted activation of H_(2)O_(2) fluidized bed

作　　者：刘营营 张玉生 王全勇 谢海涛 张文郁[3] LIU Yingying;ZHANG Yusheng;WANG Quanyong;XIE Haitao;ZHANG Wenyu(China Urban Construction Design&Research Institude Co.Ltd.,Beijing 100120,China;Shandong Huacheng Engineering Technology Co.Ltd.,Jinan 250101,China;College of Chemistry and Chemical Engineering,Qilu University of Technology,Jinan 250353,China)

机构地区：[1]中国城市建设研究院有限公司,北京100120 [2]山东华城工程技术有限公司,济南250101 [3]齐鲁工业大学化学与化工学院,济南250353

出　　处：《环境工程学报》2024年第1期110-120,共11页Chinese Journal of Environmental Engineering

基　　金：山东省企业技术创新项目(202250101281)。

摘　　要：针对常规光催化技术催化剂回收困难,紫外/双氧水(UV/H_(2)O_(2))技术残余H_(2)O_(2)污染严重等问题,采用浸渍法制备了铁负载多孔发泡玻璃(Fe-PG)并将其用于紫外光辅助活化H_(2)O_(2)流化床降解水杨酸(SA)。结果表明,在相同实验条件下,Fe-PG紫外光辅助活化H_(2)O_(2)(UV/H_(2)O_(2)/Fe-PG)流化床工艺对SA的降解率、矿化率和H_(2)O_(2)利用率均明显优于UV/H_(2)O_(2)工艺;在考虑运行成本的情况下,最佳水力停留时间(HRT)为40 min,最佳H_(2)O_(2)投加量为3 mmol·L^(-1),最佳Fe-PG膨胀率为30%;UV/H_(2)O_(2)/Fe-PG流化床工艺对SA溶液初始质量浓度、pH和盐离子具有很强的耐受性,连续运行30 d后对SA的降解率仍维持在98%以上,矿化率仍高达78.1%。UV/H_(2)O_(2)/Fe-PG流化床工艺降解SA的主要活性物质为·OH、O_(2)^(·-)和h^(+),降解过程符合一级动力学。以上研究结果可为光催化辅助活化H_(2)O_(2)流化床技术实现工程应用提供技术支撑。Aiming at the difficulty of catalyst recovery in conventional photocatalytic technology and serious residual H_(2)O_(2) pollution in ultraviolet/hydrogen peroxide(UV/H_(2)O_(2)) technology,iron-loaded porous foamed glass(Fe-PG) was prepared by an impregnation method,and it was used in the ultraviolet light-assisted activation of H_(2)O_(2) fluidized bed to degrade salicylic acid(SA).The results show that under the same experimental conditions,the SA degradation rate,mineralization rate and H_(2)O_(2) utilization rate by Fe-PG UVassisted activation of H_(2)O_(2)(UV/H_(2)O_(2)/Fe-PG) fluidized bed process were significantly better than UV/H_(2)O_(2).Taking operating costs into consideration,the optimal hydraulic residence time(HRT) was 40 min,the optimal H_(2)O_(2) dosage was 3 mmol·L^(-1),and the optimal Fe-PG expansion rate was 30%.UV/H_(2)O_(2)/Fe-PG fluidized bed process had a strong tolerance to the initial concentration,pH and salt ions of SA solution.After 30 days of continuous operation,the degradation rate of SA remained above 98%,and the mineralization rate was still as high as 78.1 %.The main active substances for the degradation of SA by the UV/H_(2)O_(2)/Fe-PG fluidized bed process were ·OH,O_(2)^(·-)and h^(+),and the degradation process conformed to the first-order kinetics.The research results provide a technical support for the engineering application of photocatalytic-assisted activation of H_(2)O_(2) fluidized bed technology.

关 键 词：Fe-PG 光催化流化床 水杨酸 活性物质 

分 类 号：X703[环境科学与工程—环境工程]