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Recognition of temperature distribution and light irradiation intensity toward degradation variation in photocatalytic water treatment

文献类型： 外文期刊

作者： Wang, Zheng 1 ; Liao, Min 1 ; Ou, Yumeng 1 ; Zhang, Meng 1 ;

作者机构： 1.Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China

2.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Key Lab Low Carbon Green Agr Trop Reg China, Hainan Key Lab Trop Ecocirculing Agr,Minist Agr &, Haikou 571101, Peoples R China

3.Hainan Danzhou Trop Agroecosystem Natl Observat &, Danzhou 571737, Peoples R China

4.Beihang Univ, Shenzhen Inst, Shenzhen 518000, Peoples R China

关键词： Photocatalysis; All -optical -fiber; Water treatment; Acute toxicity; Degradation byproducts

期刊名称：JOURNAL OF WATER PROCESS ENGINEERING （ 影响因子：7.0； 五年影响因子：6.7 ）

ISSN： 2214-7144

年卷期： 2024 年 59 卷

页码：

收录情况： SCI

摘要： Photocatalytic degradation technology for water treatment has received broad attractions in recent years, producing many demonstrations focused on elucidating mechanisms and enhancing kinetics to scale degradation efficiency to higher levels. However, this ignores products variation depending on reaction parameters that are essential for practical applications of photocatalysis. Here, we undertake a critical analysis of light intensity and temperature in a novel photocatalytic slurry reactor utilizing an all-optical-fiber configuration for irradiation. The light irradiation intensity and temperature distribution in solution can be precisely controlled. The luminescent bacteria acute toxicity measurements of the intermediates referring to half-degradation stage and final products are performed in photocatalytic degradation process of Rhodamine B, possess a positive relationship with temperature and irradiation intensity. Conventional simulated solar light-driven configuration is subsequently constructed for comparison, exhibiting an obvious inhomogeneous spatial distribution of temperature increase. The toxicity of the final degraded products for the conventional reactor is higher than the optical fiber reactor. Our results indicate that the control and optimization of the temperature distribution and light irradiation intensity in photocatalytic process is of vital importance in the performance evaluation of photocatalytic water treatment.

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