Volatile organic compounds in water matrices: Recent progress, challenges, and perspective.

Abstract In this study, a UV-assisted ozonation (UV/O 3 ) process for the degradation of VOCs emissions with a final scrubbing phase was implemented to evaluate the removal efficiency of toluene and to prevent the release of polluting intermediates of the single-step process. Inlet toluene concentration and applied voltage were varied in order to investigate several operating conditions. The results highlighted that at higher inlet concentration the abatement of toluene was lower, while increase in ozone concentration led to an increase of the degradation efficiencies. The additional water scrubbing step enhanced the abatement of UV/O 3 up to 98.5%, due to the solubilisation of ozone and by-products in the process water and, thus, the further oxidation of the contaminants within this phase. A maximum Elimination Capacity (EC max ) of 22.6 g m −3 h −1 was achieved with the UV/O 3 + Scrubbing. The combined system boosted higher performance and stability compared to the stand-alone (UV/O 3 ) process along with a more economical and environmental sustainability. 

/pdf/degradation-of-gaseous-volatile-organic-compounds-vocs-by-a-3nm52b1n.pdf

Degradation of gaseous volatile organic compounds (VOCs) by a novel UV-ozone technology

Emission characteristics, risk assessment and scale effective control of VOCs from automobile repair industry in Beijing.

Rapid determination of chemical concentration and odor concentration of paint-emitted pollutants using an electronic nose

/pdf/degradation-of-gaseous-volatile-organic-compounds-vocs-by-a-1ugqscd9.pdf

Volatile organic compounds (VOCs) are secondary pollutant precursors having adverse impacts on the environment and human health. Although VOC emissions, their sources, and impacts have been investigated, the focus has been on large-scale industrial sources or indoor environments; studies on relatively small-scale enterprises (e.g., auto-repair workshops) are lacking. Here, we performed field VOC measurements for an auto-repair painting facility in Korea and analyzed the characteristics of VOCs emitted from the main painting workshop (top coat). The total VOC concentration was 5069-8058 ppb, and 24-35 species were detected. The VOCs were mainly identified as butyl acetate, toluene, ethylbenzene, and xylene compounds. VOC characteristics differed depending on the paint type. Butyl acetate had the highest concentration in both water- and oil-based paints; however, its concentration and proportion were higher in the former (3256 ppb, 65.5%) than in the latter (2449 ppb, 31.1%). Comparing VOC concentration before and after passing through adsorption systems, concentrations of most VOCs were lower at the outlets than the inlets of the adsorption systems, but were found to be high at the outlets in some workshops. These results provide a theoretical basis for developing effective VOC control systems and managing VOC emissions from auto-repair painting workshops.

/pdf/species-and-characteristics-of-volatile-organic-compounds-5dh4ch0ogn.pdf

Species and characteristics of volatile organic compounds emitted from an auto-repair painting workshop.

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Species and characteristics of volatile organic compounds emitted from an auto-repair painting workshop.