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深圳市表层土中氟化物组成及分布
引用本文:刘晓湾,赵亮,张鸿,柴之芳,沈金灿,杨波,刘国卿.深圳市表层土中氟化物组成及分布[J].中国环境科学,2015,35(2):499-505.
作者姓名:刘晓湾  赵亮  张鸿  柴之芳  沈金灿  杨波  刘国卿
作者单位:深圳大学生命科学学院;深圳大学物理科学与技术学院;中国科学院高能物理研究所;深圳出入境检验检疫局食品检验检疫技术中心;深圳大学化学与化工学院
基金项目:国家自然科学基金项目(11275130,21177089,31201444,41102217)
摘    要:为探究深圳市表层土中氟化物的组成及其与土壤性质参数(有机碳和p H值)的相关关系,应用氟离子选择电极法测定了深圳市表层土中总氟(TF)、可萃取有机氟(EOF)的含量,用固相萃取分离富集与高效液相色谱串联质谱的方法分析了深圳市表层土中全氟化合物(PFCs)的残留水平.结果表明,深圳市表层土中氟化物主要以无机态存在,呈TFEOFIF(可鉴别F,即以氟计量的总PFCs)的分布规律;EOF仅占TF的0.04%,IF占EOF的0.32%,显示近99.7%的EOF仍属未知.深圳市表层土中PFOA、PFOS分别占∑PFCs的43%(18%~100%)和20%(n.d.~44%),是表层土中主要的PFCs污染物,就空间分布而言,∑PFCs呈西高东低的趋势.表层土中EOF和∑PFCs含量受土壤性质参数的影响,p H值与EOF(P0.05)、∑PFCs(P0.01)含量呈负相关,有机碳则与EOF、∑PFCs呈正相关(P0.01).

关 键 词:表层土  总氟  可萃取有机氟  全氟化合物  全氟辛酸  全氟辛烷磺酸  土壤性质参数  深圳市  

Composition and distribution of the fluoride compounds in topsoil samples of Shenzhen
LIU Xiao-wan;ZHAO Liang;ZHANG Hong;CHAI Zhi-fang;SHEN Jin-can;YANG Bo;LIU Guo-qing.Composition and distribution of the fluoride compounds in topsoil samples of Shenzhen[J].China Environmental Science,2015,35(2):499-505.
Authors:LIU Xiao-wan;ZHAO Liang;ZHANG Hong;CHAI Zhi-fang;SHEN Jin-can;YANG Bo;LIU Guo-qing
Institution:LIU Xiao-wan;ZHAO Liang;ZHANG Hong;CHAI Zhi-fang;SHEN Jin-can;YANG Bo;LIU Guo-qing;College of Life Sciences,Shenzhen University;College of Physics Science and Technology,Shenzhen University;Institute of High Energy Physics,Chinese Academy of Sciences;Food Inspection Center of Shenzhen Entry-exit Inspection and Quarantine Bureau;College of Chemistry and Chemical Engineering,Shenzhen University;
Abstract:In order to explore the composition of fluoride compounds and their relationship with soil parameters,23topsoil samples were collected from Shenzhen. The total contant of fluorine (TF) and extractable organic fluorine (EOF) were measured using fluoride ion selective electrode, and the residue level of 13perfluorinated compounds (PFCs) were analyzed using high performance liquid chromatography-tandem mass spectrometry combined with solid phase extraction enrichment. The results indicated that the fluoride mainly existed in the form of inorganic fluoride, and its distribution followed the order of TF>>EOF>> IF (Identified Fluorine) in topsoil samples. EOF only accounted for 0.04% of TF, and IF accounted for 0.32% of EOF, indicating that nearly 99.7% of the EOF was unknown. Perfluorooctanoic acid and perfluorooctane sulfonate were the major PFCs residue species, accounting for 43%(18%~100%) and 20% (n.d.~44%) of ∑PFCs, which were higher in the west than in the east of Shenzhen. Soil parameters could affect the levels of EOF and ΣPFCs, which negatively correlated with pH, and positively correlated with topsoil organic carbon.
Keywords:topsoil  total fluorine (TF)  extractable organic fluorine (EOF)  perfluorinated compounds (PFCs)  perfluorooctanoic acid (PFOA)  perfluorooctane sulfonate (PFOS)  soil parameters  Shenzhen city  
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