摘要
为探讨全氟化合物(PFASs)在偏远地区的赋存水平及其来源,采用超高效液相色谱-串联质谱法分析了青藏高原东北部地区18个点位表层土壤中12种PFASs含量水平和分布特征,并对其进行来源解析.结果表明,土壤中有11种PFASs检出,ω(Σ11PFASs)范围为0.043~1.573 ng·g^(-1),平均值为0.398 ng·g^(-1),其中单体PFBA的含量最高(平均值为0.164 ng·g^(-1)),PFHxA含量最低(平均值为0.005 ng·g^(-1)),其他单体PFASs含量处于同一水平(平均值为0.011~0.057 ng·g^(-1)),短链PFASs是该区域PFASs的主要贡献者.PFASs空间分布整体表现为西和北部较高,东南较低,PFBA存在高山冷凝效应.主成分分析表明,青藏高原东北部区域土壤中PFASs主要来源于PFASs及其前体物大气传输至此发生的沉降和降解,少数地区受点源污染直接排放影响,金属和矿产等工业生产和人类活动是其主要来源.
Surface soil samples collected at 18 sites from the northeast Tibetan Plateau were used to analyze perfluoroalkyl substances(PFASs)via ultra-performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS)to study the concentration levels and sources of PFASs.The results showed that 11 PFASs were detected in the soil,and theω(Σ11)PFASs ranged from 0.043-1.573 ng·g^(-1)with an average concentration of 0.398 ng·g^(-1).PFBA displayed the highest concentration level with a mean content of 0.164 ng·g^(-1),whereas PFHxA was at the lowest level(0.005 ng·g^(-1)).The concentrations of the other PFASs were similar to each other(0.011-0.057 ng·g^(-1)).Generally,PFASs contents in the west and north were higher than that in the southeast,and the alpine condensation effect existed for PFBA.The principal component analysis showed that PFASs in surface soils in the northeast Tibetan Plateau region mainly originated from the atmospheric transport of PFASs and their precursors.Few areas were affected by direct emissions of point source pollution,and the main sources were the industrial production of metals/minerals and other human activities.
作者
温祥洁
陈朝辉
徐维新
吴小娟
郝云庆
刘伟
印红玲
方淑红
WEN Xiang-jie;CHEN Zhao-hui;XU Wei-xin;WU Xiao-juan;HAO Yun-qing;LIU Wei;YIN Hong-ling;FANG Shu-hong(College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2022年第6期3253-3261,共9页
Environmental Science
基金
国家自然科学基金项目(21607018)
四川省科技计划项目(2021YJ0384)
大学生创新创业训练计划项目(202110621067)。
关键词
全氟化合物(PFASs)
青藏高原
表层土壤
分布特征
源解析
perfluoroalkyl substances(PFASs)
Tibetan Plateau
surface soil
distribution characteristics
source apportionment
