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Incomplete combustion of bituminous coal will produce a large number of coke oven emissions (COEs).Polycyclic aromatic hydrocarbons (PAHs) account for the largest proportion of these COEs.PAHs enter the human body mainly through the respiratory tract,digestive tract,and skin[1],becoming hydroxyl PAHs (OH-PAHs) following their metabolism by the human body and are ultimately excreted mainly in urine.OH-PAHs in urine can effectively reflect the intal exposure to PAHs and is an important biomarker[2].