Figure 1. (A) Composition and gaseous concentration (pg/m3) of total HV-POPs in 78 urban air samples. (B) Spatial profiles of HV-POPs (∑7VMS, ∑23HHCs, HCBD, ∑17CNBs, and ∑4HCHs) at six sampling sites across Asia and Africa. The panel (B) was modified on the base map of China sourced from “MAP WORLD” (https://www.tianditu.gov.cn/). IQR is the interquartile range.Figure 2 Comparison of the concentrations (ng/m3) of various pollutants in the gas phase at the same sampling site in Guangzhou. Pollutants include 201 polychlorinated biphenyls (PCBs), 75 polychlorinated naphthalenes (PCNs), 27 organochlorine pesticides (OCPs), 8 polybrominated diphenyl ethers (PBDEs), 6 novel brominated flame retardants (NBFRs), 11 organophosphate flame retardants (OPFRs), 16 polycyclic aromatic hydrocarbons (PAHs), short-chain chlorinated paraffins (SCCPs), medium-chain chlorinated paraffins (MCCPs), and 52 HV-POPs. IQR is the interquartile range.
