摘要
在淄博市6家代表性城市污水处理厂采集12个污泥样品,采用GC-MS法测定污泥中16种多环芳烃(PAHs)的含量,研究分析PAHs分布特征和来源,并作风险评价。结果表明,淄博城市污泥中共检出15种PAHs,总质量比(∑_(16) PAHs)范围为0.23 mg/kg~3.76 mg/kg,平均值为1.20 mg/kg,各污泥间∑_(16) PAHs差异显著;7种致癌性PAHs的质量比为0.11 mg/kg~2.56 mg/kg;污泥以6环PAHs为主。来源分析显示,污泥中PAHs主要来源于生物质和煤的燃烧,兼有汽车尾气排放的特征。风险评价结果显示,6家污水处理厂污泥中PAHs毒性当量浓度(∑_(16) TEQ)由高到低为Z2>Z5>Z6>Z4>Z1>Z3,7种致癌性PAHs是致癌风险的主要贡献者,其中二苯并[a,h]蒽贡献率最高。
The content of 16 kinds of polycyclic aromatic hydrocarbons in 12 sludge samples from 6 typical sewage treatment plants in Zibo were determined by GC-MS,the distribution and sources of PAHs were analyzed.The results showed that a total of 15 PAHs were detected in the sewage sludge in Zibo,and the total mass ratio(∑_(16) PAHs)ranged from 0.23 mg/kg to 3.76 mg/kg,with an average of 1.20 mg/kg.∑_(16) PAHs were significantly different among various sludge.The mass ratio of 7 carcinogenic PAHs ranged from 0.11 mg/kg to 2.56 mg/kg.Hexacyclic aromatic hydrocarbon were dominated.Source analysis showed that PAHs in sludge mainly came from the combustion of biomass and coal,and vehicle exhaust emission.The results of risk assessment showed that the toxic equivalent concentration of PAHs(∑_(16) TEQ)in the sludge from 6 sewage treatment plants ranged from high to low as Z2>Z5>Z6>Z4>Z1>Z3,7 carcinogenic PAHs were main contributors to cancer risk,among which dibenzo[a,h]anthracene had the highest contribution rate.
作者
宋艳艳
崔静
刁振凤
梁景波
边志明
SONG Yan-yan;CUI Jing;DIAO Zhen-feng;LIANG Jing-bo;BIAN Zhi-ming(Zibo Eco-environmental Monitoring Centre of Shandong Province,Zibo,Shandong 255040,China)
出处
《环境监测管理与技术》
CSCD
2022年第4期43-48,共6页
The Administration and Technique of Environmental Monitoring
基金
淄博市重点研发计划(公益类专项)基金资助项目(2019gy010142)。
关键词
多环芳烃
城市污泥
分布特征
源解析
风险评价
淄博
Polycyclic aromatic hydrocarbons
Sewage sludge
Distribution characteristic
Source apportionment
Risk assessment
Zibo
