Indoor air pollution and health risks assessment of chemical pollutants in public places in Henan province
Objective To assess the pollution status of chemical pollutants in the air of some public places in Henan province and evaluate the health risks posed by formaldehyde,ammonia,and benzene series compounds to employees.Methods Indoor air quality monitoring data from hotels and hair salons in four cities in Henan province during 2020 to 2021 were collected via the"Environmental Health Information Platform"of"Surveillance of Environmental Health Hazards in Public Places"information management system.The health risks were assessed according to Technical Guide for Environmental Health Risk Assessment of Chemical Exposure(WS/T 777-2021).Results The survey included a total of 202 hotels and 96 hair salons.For hotels,the qualification rates were as follow:PM10(66.76％),PM25(70.07％),formaldehyde(95.97％),C02(96.83％),xylene(99.42％),and benzene(99.71％),with toluene and CO both at 100.00％.For hair salons,the rates were:PM10(61.95％),PM25(65.49％),ammonia(83.19％),formaldehyde(87.61％),benzene(97.35％),and toluene(99.12％),with xylene at 100.00％.The non-carcinogenic hazard quotient(HQ)of toluene in hotels was below 1,while the median HQ values for formaldehyde,benzene,and xylene were all less than 1,but the maximum HQ values all exceeded 1.In hair salons,the HQ for toluene and xylene was below 1,with the median HQ values of formaldehyde,benzene,and ammonia less than 1,and the maximum HQ values above 1.The median carcinogenic risks(CR)of formaldehyde ranged from 10-6 to 10-4,with the maximum CR exceeding 10-4.The median CR of benzene was below 10-6,with the maximum CR of benzene in hotels ranging from 10-6 to 10-4,and in hair salons above 10-4.Conclusions Both types of public places exhibit indoor air pollution,necessitating control measures.Formaldehyde merits particular attention and control,while benzene requires monitoring in some high-risk locations.Supervision and management should be enhanced for some public places with high xylene and ammonia levels.
Public placesIndoor air pollutionHealth risk assessmentChemical pollutantsHenan province
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