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  • Title: Pollution characteristics and risk assessment of air multi-pollutants from typical e-waste dismantling activities.
    Author: Wang H, Hao R, Nie L, Zhang X, Zhang Y.
    Journal: Environ Pollut; 2022 Feb 01; 294():118630. PubMed ID: 34871645.
    Abstract:
    This study investigated the characteristics of air multi-pollutants emitted during typical electronic waste (e-waste) dismantling processes and assessed their risks to the environment and human health. Concentrations of total volatile organic compounds (TVOCs), polybrominated diphenyl ethers (PBDEs), and polycyclic aromatic hydrocarbons (PAHs) in a typical e-waste dismantling workshop were 137 μg/m3, 135 ng/m3 and 42 ng/m3, respectively, which were lower than those without emission control measures. The partial removal of pollutants due to the emission control measures also decreased the ozone formation potential and non-cancer risk of volatile organic compounds (VOCs). In the workshop, the lifetime cancer risk (LCR) of VOCs (8.1 × 10-5) was close to the recommended values. Conversely, the LCR of PAHs (3.6 × 10-5) and the total exposure index of PBDEs (19 ng/d) were remarkably lower than the recommended values of 10-3 and that without emission control measures, respectively. Meanwhile, the concentrations of TVOCs, polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs), PBDEs, and PAHs in the outlet were approximately 10-30 times higher than those in the workshop. In addition, the LCR of TVOCs within a 5-km radius area remained higher than the accepted value (10-6), and the inhalation exposure risk of PCDD/Fs within a 20-km radius area was five times higher than the recommended value. Therefore, the emissions from e-waste recycling processes should be considered as an important source of air pollution, and more efficient control measures should be taken in the future.
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