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- W4283033328 endingPage "132706" @default.
- W4283033328 startingPage "132706" @default.
- W4283033328 abstract "Industrial emissions from the manufacturing of printed circuit boards (PCBs) are characterized by low concentration and high gas flow rates , and are one of the important sources of toxic and odorous volatile organic compounds (VOCs). They are deleterious to human health and considered as important precursors for the formation of ozone. Herein, we conducted a case study in which an integrated decontamination technique consisting of a spray tower (ST) and photocatalysis (PC) was applied to purify the waste gas emitted from a PCB manufacturing facility. Total of 66 VOCs including halogenated hydrocarbons (HHs), aromatic hydrocarbons (AHs), oxygen-containing hydrocarbons (OVOCs), and aliphatic hydrocarbons (AIHs) were quantified using GC-MS during four sampling events. The results showed that AHs were the largest group (contributing >85.0% of the total VOCs). The average removal efficiency (RE) of VOCs during the nine months’ continuous treatment was 72.39%. High RE was attributed to the following three aspects: the capture efficiencies of HHs with slight water solubility (50.16% of RE) and AIHs with low saturation pressure (54.75% of RE) were improved by the process consisting of ST upstream of PC, whereas AHs was preferentially degraded by PC (61.34% of RE). In addition, the ozone formation potential and the health risk (cancer and non-cancer risks) greatly decreased after the ST-PC treatment. This study suggests that ST-PC technique is a promising approach for removing continuously emitted organic waste gas with low concentration and high gas flow rates, as well as reducing the ozone formation and risk of health hazards. An integrated ST-PC technique displaying high removal efficiency and stability for preferential purification of AHs dominated exhaust gas was developed. • AHs contributed 78.47%–97.77% to the sum of VOCs emitted from PCB factory. • ST-PC integrated technique show high and stable removal ability to VOCs. • PC prefer the degradation of AHs than other VOCs groups. • O 3 formation potentials and health risks of VOCs decrease greatly after treatment." @default.
- W4283033328 created "2022-06-18" @default.
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- W4283033328 date "2022-09-01" @default.
- W4283033328 modified "2023-10-10" @default.
- W4283033328 title "Preferential removal of aromatics-dominated electronic industrial emissions using the integration of spray tower and photocatalysis technologies" @default.
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- W4283033328 doi "https://doi.org/10.1016/j.jclepro.2022.132706" @default.
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