“…Solder melting by thermal treatment with infra-red heater, hot air, or heating furnace is an important step during the removal of ECs. During the heating process, the organic materials, including board resin, plastics, brominated flame retardants (BFRs) contained in WPCB-ECs are degraded, and pollutants such as particulate matter (PM), volatile organic compounds (VOCs) (An et al, 2014;Chen et al, 2016;He et al, 2015), semi-volatile organic compounds (SVOCs) are emitted to the environment, thus causing contamination in the workshop and environmental pollution of surrounding areas (Ortuño et al, 2014a). Emission characteristics of pollutants such as polybrominated diphenyl ethers (PBDEs) (Die et al, 2019;Guo et al, 2015a, b), polybrominated dibenzo-p-dioxins/dibenzofurans (PBDD/Fs) (Xiao et al, 2016), polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs), polycyclic aromatic hydrocarbons (PAHs), released from thermal treatment of WPCB have been investigated extensively (Li et al, 2018;Cai et al, 2018a, b;Duan et al, 2011;Soler et al, 2017;Ortuño et al, 2014b).…”