南京北郊大气 BTEX 变化特征和健康风险评估  

Variation Characteristics and Health Risk Assessment of BTEX in the Atmosphere of Northern Suburb of Nanjing

作　　者：张玉欣[1] 安俊琳[1] 王健宇[1] 王俊秀[1] 师远哲 刘静达 梁静舒 

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室气候与环境变化国际合作联合实验室气象灾害预报预警与评估协同创新中心中国气象局气溶胶与云降水重点开放实验室,南京210044

出　　处：《环境科学》2017年第2期453-460,共8页Environmental Science

基　　金：中国科学院战略性先导科技专项(B类)(XDB05020206);国家自然科学基金项目(41305135,91544229);江苏省高校“青蓝工程”项目;江苏省江苏高校优势学科建设工程项目(PAPD)

摘　　要：采用2013年3月21日~2014年2月28日GC5000在线气相色谱仪对南京北郊大气中的BTEX进行观测,利用EPA人体暴露分析评价方法对BTEX进行健康风险评估.结果表明,南京北郊大气中BTEX总量呈现春季>冬季>秋季>夏季变化特征.BTEX浓度07:00~10:00与17:00~20:00时期较高,13:00~15:00之间最低;周末BTEX浓度高于工作日.BTEX来源包括交通源、工业源排放与溶剂挥发.BTEX四季HQ均表现为苯>二甲苯>乙苯>甲苯,所有分析时段内HQ风险值都在安全范围.南京北郊R值呈现冬季>秋季>春季>夏季的分布规律,R在所有分析时间都超安全阈值,存在致癌风险.BTEX concentrations were determined by GC5000 online gas chromatography in the atmosphere of the north suburb of Nanjing in March 2013 to February 2014, using the EPA human exposure analysis evaluation method for benzene series compounds of volatile organic compounds （ⅤOCs） in health risk assessment. The results showed that the total amount of BTEX showed the variation characteristics of spring ﹥ winter ﹥ autumn ﹥ summer. BTEX concentration was higher in the periods of 07：00- 10：00 and 17：00-20：00, and the lowest was detected between 13：00-15：00; At the weekend, the concentration of BTEX was higher than on the working day. The sources of BTEX included traffic sources, industrial sources and solvent evaporation. The HQ of BTEX in all four seasons showed the order of benzene ﹥ xylene ﹥ ethylbenzene ﹥ toluene, and the HQ risk values were within the safety range in all analysis periods. The distribution of R value was winter ﹥ autumn ﹥ spring ﹥ summer, and R was higher than the safety threshold for all the analyses, indicating the existence of carcinogenic risk.

关 键 词：南京北郊 BTEX 健康风险评估 非致癌风险危害商值 致癌风险 

分 类 号：X511[环境科学与工程—环境工程]