光催化涂料在破坏苯并[a]芘中的应用。空气湿度的影响

P. Homa, B. Tryba
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引用次数: 1

摘要

摘要在不同相对湿度(RH)、温度和辐照条件下,对乳胶漆(LX)光催化分解苯并[a]芘(BaP)进行了研究。涂有LX漆的瓷盘装入BaP溶液,BaP溶液溶解于乙腈中。托盘放置在光反应器内,用紫外线或荧光灯照射。采用了不同的相对湿度和温度条件。初步吸附在LX涂料表面的BaP在较高的温度和较低的相对湿度下分解速度较快。例如,在42℃和20%的相对湿度下,BaP的分解率达到64%。在相同的温度和80%的相对湿度下,这一比率下降到只有42%。在高相对湿度(80%)和紫外线照射下,涂料表面水接触角的下降速率低于相对湿度(20%)下的下降速率。实验还证明,在荧光灯照射下,BaP可被充分分解(59%,而在相同环境条件下,使用紫外光,BaP可被充分分解64%)。但其分解速度比紫外光下慢约5倍
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Application of photocatalytic paint for destruction of benzo[a]pyrene. Impact of air humidity
Abstract Latex (LX) paint was tested for photocatalytic decomposition of benzo[a]pyrene (BaP) under different conditions of relative humidity (RH), temperature and irradiation. Porcelain trays coated with LX paint were loaded with BaP solution, which was dissolved in acetonitrile. Trays were placed inside the photoreactor and irradiated with UV or a fluorescent lamp. Different conditions of RH and temperature inside the photoreactor were used. BaP preliminarily adsorbed on LX paint surface was decomposed faster at higher temperature and lower RH. For example, at 42 °C and RH 20 % BaP decomposition rate reached 64 %. At same temperature and with RH of 80 % this rate decreased to only 42 %. It was also demonstrated that at high RH (80 %) and under UV irradiation water contact angle on the paint surface was decreasing at a lower rate than under RH of 20 %. It was also proven that BaP could be sufficiently decomposed under irradiation by fluorescent lamp (59 % in comparison to 64 % under same environmental conditions with use of UV light). However, its decomposition rate was approximately 5 times slower than under UV light
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来源期刊
CiteScore
0.88
自引率
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审稿时长
1 months
期刊介绍: The Journal of advanced oxidation technologies (AOTs) has been providing an international forum that accepts papers describing basic research and practical applications of these technologies. The Journal has been publishing articles in the form of critical reviews and research papers focused on the science and engineering of AOTs for water, air and soil treatment. Due to the enormous progress in the applications of various chemical and bio-oxidation and reduction processes, the scope of the Journal is now expanded to include submission in these areas so that high quality submission from industry would also be considered for publication. Specifically, the Journal is soliciting submission in the following areas (alphabetical order): -Advanced Oxidation Nanotechnologies -Bio-Oxidation and Reduction Processes -Catalytic Oxidation -Chemical Oxidation and Reduction Processes -Electrochemical Oxidation -Electrohydraulic Discharge, Cavitation & Sonolysis -Electron Beam & Gamma Irradiation -New Photocatalytic Materials and processes -Non-Thermal Plasma -Ozone-based AOTs -Photochemical Degradation Processes -Sub- and Supercritical Water Oxidation -TiO2 Photocatalytic Redox Processes -UV- and Solar Light-based AOTs -Water-Energy (and Food) Nexus of AOTs
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