Coking wastewater treatment plant as a source of polycyclic aromatic hydrocarbons (PAHs) to the atmosphere and health-risk assessment for workers

► Coking WWTP was recognized as a new source of PAHs in atmosphere. ► Seventy seven PAHs were identified in the exhaust gas from a coking WWTP. ► Higher contents of PAHs were found in air within the coking WWTP, in which 3-4 rings predominated. ► PAHs in some of the sampling sites would have potential lung cancer risk for the workers.