Photocatalytic degradation of paracetamol on immobilized TiO2 in a low-tech reactor by solar light for water treatment

IF 2.9 Q1 MATERIALS SCIENCE, CERAMICS

Open Ceramics Pub Date : 2024-05-06 DOI:10.1016/j.oceram.2024.100599

Lukas Dufner , Lluc Aresté-Saló , Moisès Graells , Montserrat Pérez-Moya , Frank Kern , Wolfgang Rheinheimer

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Abstract

Photocatalytic water treatment is an appealing concept to mineralize organic contaminants in contaminated water. In this study, the UV-resistant drug paracetamol (PCT) in aqueous solution is degraded by using a solar irradiated loop-reactor equipped with a TiO₂ (P25) photocatalyst. The catalyst powder was dispersed in a geopolymer surface coating applied to aluminum-U-profiles connected by filament-printed polymer elements. Different assays with variations in initial PCT concentration were performed under natural solar radiation to determine the degradation kinetics of the PCT and correlate it to applied solar radiation energy density. Depending on experimental conditions, degradation efficiencies of 37.0–75.1 % were achieved within 3 h. Control samples without catalyst show no degradation. No degradation of the catalyst activity was observed within 42 h of operation time. The study shows the feasibility of this simple and scalable reactor design and coating technology for water purification under off-grid conditions provided sufficient solar radiation is available.

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在低技术含量的反应器中，利用太阳光对固定化 TiO2 上的扑热息痛进行光催化降解，用于水处理

光催化水处理是将受污染水中的有机污染物矿化的一个极具吸引力的概念。在这项研究中，利用配备了 TiO2 (P25) 光催化剂的太阳能照射循环反应器降解了水溶液中的抗紫外线药物扑热息痛 (PCT)。催化剂粉末分散在土工聚合物表面涂层中，该涂层应用于由丝状印刷聚合物元件连接的铝 U 型材上。在自然太阳辐射下，根据 PCT 初始浓度的变化进行了不同的测定，以确定 PCT 的降解动力学，并将其与应用的太阳辐射能量密度联系起来。根据实验条件的不同，3 小时内的降解效率可达 37.0-75.1%。在 42 小时的运行时间内，没有观察到催化剂活性的降解。这项研究表明，只要有充足的太阳辐射，这种简单、可扩展的反应器设计和涂层技术在离网条件下进行水净化是可行的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Open Ceramics Materials Science-Materials Chemistry

CiteScore

4.20

自引率

0.00%

发文量

102

审稿时长

67 days