摘要
短链氯化石蜡是一类新型持久性有机污染物,氯化石蜡在造纸工业中常用作施胶剂,为了评估造纸厂区土壤中短链及中链氯化石蜡(SCCPs及MCCPs)的污染状况及其潜在风险,采集厂区表层和不同深度的土壤,利用全二维气相色谱-电子捕获负化学离子源-质谱(GC×GC-ECNI-MS)测定土壤中短链及中链氯化石蜡(SCCPs及MCCPs)的含量及同类物分布特征.结果表明,SCCPs和MCCPs在厂区土壤中均有检出,其含量分别为42~3 853 ng·g^(-1)和34~2 091 ng·g^(-1),氯含量分别为59.9%~61.9%和48.7%~52.8%.不同采样点土壤样品中CPs (ΣSCCPs+ΣMCCPs)含量差异较大,污水处理区及施胶区土壤中SCCPs及MCCPs含量较高.与其他地区相比,厂区土壤中SCCPs及MCCPs处于较高水平.C_(10)Cl_(6-7)及C_(14-15)Cl_(5)是大部分土壤样品的主要同类物.主成分分析表明,厂区土壤中SCCPs及MCCPs可能主要来自于CP52产品的生产和使用.运用风险商值模型(RQ)评价SCCPs及MCCPs在造纸厂区土壤中的潜在风险,发现厂区土壤中SCCPs风险商范围为0.01~0.73,处于中等风险范围,MCCPs风险商范围为0~0.07,处于低等风险范围.儿童和成人人体暴露值低于TDI[10μg·(kg·d)^(-1)],造纸厂区非饮食暴露导致的健康风险较低.
Short-chain chlorinated paraffins are persistent organic pollutants,and chlorinated paraffins were widely used as sizing agent in the paper industry.In order to investigate the levels and risk assessment of short-chain and medium-chain chlorinated paraffins in the paper mill plant,the surface soil and soil of different depths were collected.The concentrations,congener group profiles of short-chain chlorinated paraffins (SCCPs) and medium-chain chlorinated paraffins (MCCPs) in soil were determined by two-dimensional gas chromatography coupled with electron capture-negative ion mass spectrometry.The SCCPs and MCCPs concentrations were 42-3 853ng·g^(-1)and 34-2 091 ng·g^(-1).The chlorine contents were 59.9%-61.9%and 48.7%-52.8%.The concentrations of SCCPs and MCCPs were different in the soil collected in different sampling site.The concentration of SCCPs and MCCPs were relatively higher in soil of sewage treatment area and coating area.The CP levels in soil from the paper mill plant were at a high level compared with those in other regions.C_(10)Cl_(6-7) and C_(14-15)Cl_(5)were the main congener groups in most soil samples.The results of principal component analysis showed that the CP52 commercial products may be sources of SCCPs and MCCPs in the soil.The risk quotient (RQ) for SCCPs and MCCPs were assessed in soil of paper mill plant.The results showed that the RQ values for SCCPs in soil ranged from 0.01 to 0.73 which are the medium risk,and the RQ values for MCCPs in soil ranged from 0 to 0.07,which are the low risk.The human exposure values of children and adults are lower than TDI[10μg·(kg·d)^(-1)]in both cases.The health risks caused by non-dietary exposure under paper mill area are low.
作者
张佩萱
高丽荣
宋世杰
乔林
徐驰
黄帝
王爽
蒋思静
郑明辉
ZHANG Pei-xuan;GAO Li-rong;SONG Shi-jie;QIAO Lin;XU Chi;HUANG Di;WANG Shuang;JIANG Si-jing;ZHENG Ming-hui(College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China;State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;Institute of Environment and Health,Jianghan University,Wuhan 430056,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2021年第3期1131-1140,共10页
Environmental Science
基金
国家重点研发计划项目(2019YFC1804705,2018YFC1801601)。
