摘要
为揭示松花江干支流表层沉积物中邻苯二甲酸酯类(phthalate esters,PAEs)的空间分布特征及其生态风险状况本文利用气相色谱三重四级杆质谱联用仪(GC-MS)对松花江干支流表层沉积物中6种PAEs的含量分布和组成特征进行了分析,并采用商值法和环境风险水平(ERL)法对其生态风险状况进行评价.结果表明:①松花江干支流沉积物6种邻苯二甲酸酯(∑6PAEs)含量范围(以干重计)为6 832.5~36 298.9ng·g-1(平均值为18388.6ng·g-1),邻苯二甲酸(2-乙基己基)酯(DEHP)和邻苯二甲酸二丁酯(DBP)为主要组分,干流点位∑6PAEs含量(6 832.5~36 298.9 ng·g-1,平均值为18 616.9ng·g-1)与支流点位∑6PAEs(10 367.6~26 593.3ng·g-1,平均值为18 264.1ng·g-1)差异不显著(P>0.05),支流点位各PAEs单体含量与干流点位差异不大.从上游到下游干支流∑6PAEs含量呈现先降后升的趋势.农业自然区域∑6PAEs平均含量(18 677.5 ng·g-1)与城市工业区域(18 063.7 ng·g-1)相近(P>0.05),DBP和DEHP是两区域内的主要PAEs两者平均值贡献率高达98%以上.②松花江干支流表层沉积物中∑6PAEs主要来源于人类日用品、农业生产以及含有增塑剂的工业生产.③松花江表层沉积物中DMP和BBP对水生生物无生态风险,DEP具有低水平生态风险,而DEHP和DBP对水生生物具有高生态风险.
This study assesses the spatial distribution characteristics and ecological risk of phthalate esters(PAEs) in the surface sediments of the mainstream and tributaries of the Songhua River,China,using concentrations and composition of six PAEs,which were analyzed using gas chromatography-mass spectrometery(GC-MS).We assess the∑6 PAEs ecological risk using the hazard quotient(HQ) method and environmental risk levels(ERL).The results were as follows.①It was found that the total concentrations of∑6 PAEs ranged from 6 832.5 to 36 298.9 ng·g-1 dry weight(average 18 388.6 ng·g-1),with the main contributions coming from di-(2-ethylhexyl) phthalate(DEHP) and di-n-butyl phthalate(DBP).The difference between the main stream∑6 PAEs(6 832.5-36 298.9 ng·g-1,average 18 616.9 ng·g-1) and the tributary∑6 PAEs(10 367.6-26 593.3 ng·g-1,average 18 264.1 ng·g-1) was not significant(P> 0.05).The mean concentrations of individual PAEs in the tributary stream differed little from that of the main stream.The∑6 PAEs concentration of the Songhua River decreased initially but then increased from the upstream to the downstream.The average∑6 PAEs concentration in natural agricultural areas(18 677.5 ng·g-1) was similar to that found in urban industrial areas(18 063.7 ng·g-1),and DBP and DEHP contributed 98% of∑6 PAEs.②The main sources of∑6 PAEs were domestic,agricultural production,and industrial production using plasticizers.③The ecological risk assessment indicated that DMP and BBP in the surface sediments of the Songhua River did not pose an ecological risk for aquatic organisms,and that DEP was associated with a low ecological risk,whereas DEHP and DBP posed a high ecological risk for aquatic organisms.
作者
王欢
杨永哲
王海燕
董伟羊
闫国凯
常洋
李泽文
赵远哲
凌宇
WANG Huan;YANG Yong-zhe;WANG Hai-yan;DONG Wei-yang;YAN Guo-kai;CHANG Yang;LI Ze-wen;ZHAO Yuan-zhe;LING Yu(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Research Center for Environmental Pollution Control Engineering Technology,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2020年第1期232-241,共10页
Environmental Science
基金
国家水体污染控制与治理科技重大专项(2015ZX07201-008-02)
