Naslov
Solar photocatalysis for air and water purification: environmental aspects quantification

Autori
Radetić, Lucija ; Marčec, Jan ; Miklec, Kristina ; Grčić, Ivana ; Brnardić, Ivan ; Jajčinović, Igor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts PTIM 2021 / Lodeiro, Carlos ; Capelo-Martinez, Jose Luis , Santos, Hugo M. ; Oliveira, Elisabete - Caparica : PROTEOMASS Scientific Society (Portugal), 2021, 159-159

ISBN
978-989-54822-9-0

Skup
4th International Caparica Conference on Pollutant Toxic Ions and Molecules (PTIM 2021)

Mjesto i datum
Caparica, Portugal, 31.10.2021. - 04.11.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
Photocatalysts ; Life cycle assessment ; Ammonia ; Diclofenac ; Nanocomposites

Sažetak
Throughout recent years, photochemical oxidation has been proven as a viable option for treating emerging and priority pollutants. However, at a wider scale, photocatalysis yet must reach wider prototype-scale application. Accordingly, it must be acceptable from environmental point of view[1], especially when it comes to nanotechnology usage in synthesis of new photocatalysts. Therefore, assessing environmental impact is the most adequate with a life cycle assessment (LCA) due to its engineering approach. Assessment is made based on the energetic and mass balance of the process and it takes into account chemical reactions which allows comprehensive quantification of impacts on the environment[2]. In this paper, eight scenario analyses were presented to improve understanding of advantages and drawbacks related to application of solar photocatalysis for air & water purification. A comparative LCA was performed with a functional unit set as achieving 90% of degradation in comparison with the initial pollutant concentration. The scenarios were determined in consideration with the following parameters: the pollutant, the photocatalysts and the source of irradiation. All experiments were performed on laboratory scale in compound parabolic collector (CPC) which represent state-of-the-art in geometry design of photocatalytic reactors. Photocatalytic oxidation was assisted either by UV photocatalytically active titanium dioxide (TiO2) or UV-VIS photocatalytically active nanocomposite of TiO2 and carbon nanotubes (CNT) under natural and simulated irradiation spectra. Both photocatalysts were immobilized on fiber glass mesh by sol-gel method. As pollutants, ammonia and diclofenac were chosen as the representative air pollutant due to its contribution to the formation of secondary particulate matter[3] and representative water micropollutant due to pandemic situation and increased analgetic consumption, respectively[4]. Results have confirmed assumptions regarding the favorable usage of natural solar irradiation in photocatalysis. Furthermore, quantification of given environmental footprints by LCA represents a good base for a decision making in engineering and applying of custom-made photocatalytic solutions.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne tehničke znanosti

POVEZANOST RADA