LYU Xiaoqian,ZHANG Yinlong.Pollution Characteristic,Source and Health Risk Assessment of PAHs in Road Dust of Hefei City[J].Northern Horticulture,2019,43(18):85-92.[doi:10.11937/bfyy.20190488]
合肥市区地面尘中多环芳烃含量、来源及健康风险评价
- Title:
- Pollution Characteristic,Source and Health Risk Assessment of PAHs in Road Dust of Hefei City
- Keywords:
- road dust; PAHs; pollution characteristic; source; health risk assessment
- 文献标志码:
- A
- 摘要:
- 城市地面尘是城市环境中多环芳烃(PAHs)污染的主要载体之一,与城市生态环境及人类健康密切相关。该研究采集了合肥市5种功能区地面尘样品,利用超高效液相色谱仪(UPLC)测定了合肥市区16种PAHs(∑16 PAHs)的含量,分析其富集特征和来源,并对地面尘中PAHs含量进行健康风险评价。结果表明:合肥市地面尘中∑16 PAHs含量范围为1 432.86~14 367.07 μg?kg-1,平均值为6 015.04 μg?kg-1。空间差异表现为交通区>工业区>商业区>文教区>公园绿地。各功能区地面尘中PAHs的组分特征一致,均以4、5环占优势,其次为3环、6环,2环占比最低。7种致癌单体PAH(∑7c PAHs)含量浓度范围在131.56~1 987.22 μg?kg-1,平均值为4 654.19 μg?kg-1。采用特征比值法和主成分分析法判断出合肥市区地面尘中PAHs主要来源于柴油和汽油机动车排放,石油、天然气、燃煤和生物质燃烧是其来源的重要补充。健康风险评价表明,研究区域不同年龄段人群通过呼吸途径产生的ILCR范围是10-13~10-10,说明未产生致癌风险,通过摄取和皮肤接触所产生的致癌风险(ILCRs)范围在10-8~10-5,说明存在一定的致癌风险。
- Abstract:
- Urban road dust is one of the main carriers of PAHs in urban environment,which is closely related to urban ecological environment and human health.In this study,sixteen PAHs were detected by Ultra Performance Liquid Chromatography(UPLC),with road dust samples collected from five functional areas in Hefei.To study the accumulation characteristic and source,and assess the otential health risks of PAHs.The results showed that the content of ∑16 PAHs in road dust in Hefei ranged from 1 432.86 to 14 367.07 μg?kg-1,with an average value of 6 015.04 μg?kg-1.There were spatial differences which followed in this descending:traffic area>industrial area>business area>institutes and colleges district area>park green.The constitution of the PAHs in sampling sites were most predominantly by 4-rings and 5-rings,followed by 3-rings and 6-rings,while 2-rings had the lowest percentage of ∑16PAHs.There were seven carcinogenic PAHs that contribute to potential carcinogenicity risk.These PAHs range from 131.56 to 1 987.22 μg?kg-1,with an average value of 4 654.19 μg?kg-1.According to characteristics of the ratio and principal component analysis conducted on PAHs in road dust were the most important sources of PAHs include disel and gasoline vehicle emission,petroleum,gas fuel,coal and fossil fuels combustion,and biomass burning.The incremental lifetime cancer risk (ILCR) values via inhalation was 10-13-10-10,which indicated no potential risk.However,the ILCR values for ingestion and dermal contact were among 10-8 -10-5,which indicated potential risk.
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备注/Memo
第一作者简介:吕晓倩(1987-),女,博士,讲师,现主要从事风景园林学、湿地生态学和污染生态学等研究工作。E-mail:lxqhefei@163.com.责任作者:张银龙(1965-),男,博士,教授,现主要从事湿地生态学和环境生态学等研究工作。E-mail:ecoenvylz@163.com.基金项目:国家重点研发计划课题资助项目(2016YFC0502704);江苏省高校自然科学研究重大资助项目(13KJA180002)。收稿日期:2019-04-27