Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 28, Issue 19, Pages 23610-23633Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-10022-9
Keywords
Photocatalysis; Photocatalytic coating; Structured photocatalytic systems; Micropollutants; Low-cost structures; Photoreactor; Water treatment
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Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), Brazil
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The study explores various photocatalytic coating techniques in low-cost structures for treating water and wastewater contaminated with micropollutants. It highlights the methodologies and synthesis parameters that can affect the final result of the coating, as well as the ability to reuse photocatalysts and methods for pretreating the structural surface. The dip-coating technique is commonly used due to its simplicity, with surface pretreatment techniques typically involving cleaning with water, soap, and some alcohols.
The persistence of many micropollutants in water and wastewater is of great concern to the contemporary scientific community. Several types of advanced techniques such as heterogeneous photocatalysis are being used for the degradation of micropollutants in waters from domestic, industrial, and agricultural activities. Thus, structured photocatalytic systems are a great alternative in the development of photocatalytic reactors and continuous water treatment systems, as they present good autonomy during the treatment process. Many aspects such as type and geometry of the catalytic structure to be developed must be carefully chosen for the proper functioning of the system, as well as the best routes by which the photocatalysts will be immobilized. In this sense, this work brings the main photocatalytic coating techniques in low-cost structures for the treatment of water and wastewater contaminated with micropollutants. The methodologies and synthesis parameters that can influence the final result of the coating were highlighted, as well as the ability to reuse photocatalysts and methods for pretreating the structural surface. The dip-coating technique was the most reported among the current works due to its simplicity and, predominantly, the pretreatment techniques of the structure are still cleaning the surface with water, soap, and also some alcohols.
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