Degradation of 4-nonylphenol in bromide-containing water by UVC/O3/TiO2-combination processes: Impacts on trihalomethanes and haloacetic acids formation

IF 5.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Emerging Contaminants Pub Date : 2025-01-16 DOI:10.1016/j.emcon.2025.100471

Muammar Qadafi , Raden Tina Rosmalina , Hanny Meirinawati , Widyarani , Diana Rahayuning Wulan

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Abstract

The presence of nonylphenol (NP) in bromide-containing water contributed to the formation of regulated disinfection by products (DBPs): trihalomethanes-4 (THM4) and haloacetic acids-5 (HAA5). This study was conducted to determine the impact of ozonation initial pH and UVC-combination process in NP, its precursor properties to THM4 and HAA5, degradation. The UVC-combination process was conducted with standalone UVC, UVC/O₃, and photocatalytic ozonation using UVC/O₃/TiO₂. All the process was conducted for 5, 10, 15, 20, 25, and 30min. The samples that have gone through the UVC-combination process were then chlorinated for 24 h to determine the formation of DBPs. The standalone UVC process was sufficient to degrade NP in water with a removal efficiency of 78.99 %. In addition, the UVC/O₃ and UVC/O₃/TiO₂ process enhances significantly the NP degradation, achieving 91.15 % and 99.15 % respectively. Although the NP was successfully degraded during the UVC-combination process, the formation of THM4 and HAA5 increased significantly. The UVC/O₃ process is the best choice in removing the NP and THM4 and HAA5 formation with 84.34 %, 94.27 %, and 62.19 % respectively after 5min irradiation process.

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来源期刊

Emerging Contaminants Medicine-Public Health, Environmental and Occupational Health

CiteScore

10.00

自引率

6.70%

发文量

审稿时长

44 days

期刊介绍： Emerging Contaminants is an outlet for world-leading research addressing problems associated with environmental contamination caused by emerging contaminants and their solutions. Emerging contaminants are defined as chemicals that are not currently (or have been only recently) regulated and about which there exist concerns regarding their impact on human or ecological health. Examples of emerging contaminants include disinfection by-products, pharmaceutical and personal care products, persistent organic chemicals, and mercury etc. as well as their degradation products. We encourage papers addressing science that facilitates greater understanding of the nature, extent, and impacts of the presence of emerging contaminants in the environment; technology that exploits original principles to reduce and control their environmental presence; as well as the development, implementation and efficacy of national and international policies to protect human health and the environment from emerging contaminants.