Objective Chlorination is often used to disinfect recreational water in large amusement parks;however,the health hazards of chlorination disinfection by-products(DBPs)to occupational populations are unknown.This study...Objective Chlorination is often used to disinfect recreational water in large amusement parks;however,the health hazards of chlorination disinfection by-products(DBPs)to occupational populations are unknown.This study aimed to assess the exposure status of chlorinated DBPs in recreational water and the health risks to employees of large amusement parks.Methods Exposure parameters of employees of three large amusement parks in Shanghai were investigated using a questionnaire.Seven typical chlorinated DBPs in recreational water and spray samples were quantified by gas chromatography,and the health risks to amusement park employees exposed to chlorinated DBPs were evaluated according to the WHO's risk assessment framework.Results Trichloroacetic acid,dibromochloromethane,bromodichloromethane,and dichloroacetic acid were detected predominantly in recreational water.The carcinogenic and non-carcinogenic risks of the five DBPs did not exceed the risk thresholds.In addition,the carcinogenic and non-carcinogenic risks of mixed exposure to DBPs were within the acceptable risk limits.Conclusion Typical DBPs were widely detected in recreational water collected from three large amusement parks in Shanghai;however,the health risks of DBPs and their mixtures were within acceptable limits.展开更多
本文用顶空气相色谱法,在 Porapak S 柱上测定人血中乙醇及其代谢物乙醛、乙酸。全血中乙酸在酸性条件下直接加入甲醇酯化成乙酸甲酯,改善了乙酸的挥发性和色谱行为。方法快速,简便,准确。应用本法测定两例正常人饮酒后血中乙醇、乙醛...本文用顶空气相色谱法,在 Porapak S 柱上测定人血中乙醇及其代谢物乙醛、乙酸。全血中乙酸在酸性条件下直接加入甲醇酯化成乙酸甲酯,改善了乙酸的挥发性和色谱行为。方法快速,简便,准确。应用本法测定两例正常人饮酒后血中乙醇、乙醛、乙酸浓度,结果表明血液乙醇浓度在酒后90分钟最高,而血液乙醛、乙酸浓度高峰则与人的乙醇代谢能力有关。展开更多
基金funded by the Foundation of State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants(Grant No.SEPKL-EHIAEC-202210)the Foundation of Shanghai Municipal Health Commission(Grant No.202240327)the Key Discipline Project of the Three-year Action Plan for Strengthening Public Health System Construction in Shanghai(2023-2025)(Grant No.GWVI-11.1-38)。
文摘Objective Chlorination is often used to disinfect recreational water in large amusement parks;however,the health hazards of chlorination disinfection by-products(DBPs)to occupational populations are unknown.This study aimed to assess the exposure status of chlorinated DBPs in recreational water and the health risks to employees of large amusement parks.Methods Exposure parameters of employees of three large amusement parks in Shanghai were investigated using a questionnaire.Seven typical chlorinated DBPs in recreational water and spray samples were quantified by gas chromatography,and the health risks to amusement park employees exposed to chlorinated DBPs were evaluated according to the WHO's risk assessment framework.Results Trichloroacetic acid,dibromochloromethane,bromodichloromethane,and dichloroacetic acid were detected predominantly in recreational water.The carcinogenic and non-carcinogenic risks of the five DBPs did not exceed the risk thresholds.In addition,the carcinogenic and non-carcinogenic risks of mixed exposure to DBPs were within the acceptable risk limits.Conclusion Typical DBPs were widely detected in recreational water collected from three large amusement parks in Shanghai;however,the health risks of DBPs and their mixtures were within acceptable limits.
文摘本文用顶空气相色谱法,在 Porapak S 柱上测定人血中乙醇及其代谢物乙醛、乙酸。全血中乙酸在酸性条件下直接加入甲醇酯化成乙酸甲酯,改善了乙酸的挥发性和色谱行为。方法快速,简便,准确。应用本法测定两例正常人饮酒后血中乙醇、乙醛、乙酸浓度,结果表明血液乙醇浓度在酒后90分钟最高,而血液乙醛、乙酸浓度高峰则与人的乙醇代谢能力有关。