摘要
为了研究深圳大鹏湾海域沉积物和生物体中多环芳烃的污染状况,2011年10月在大鹏湾采集表层沉积物及鱼类、虾类和贝类等生物样品,采用气相色谱-质谱法（GC-MS）分析了16种优先控制多环芳烃（PAHs）的含量.结果表明,大鹏湾海域表层沉积物和生物样品中PAHs总量范围分别为216.56~1 314.92 ng·g-1（干重,下同）和70.88~251.90 ng·g-1（湿重,下同）;生物样品按平均含量计,鱼类最高（171.52 ng·g-1）,贝类次之（134.75 ng·g-1）,虾类最低（123.35 ng·g-1）.与全球其他海域相比,大鹏湾海域表层沉积物和生物体PAHs污染处于中等水平.沉积物中PAHs的组成以4环为主,来源分析表明该海域PAHs污染主要来源于化石燃料燃烧源和石油污染源的共同输入.生物体中PAHs主要为2~3环PAHs,这与其生活习性和污染物的生物可利用性等因素有关.风险评价表明,大鹏湾表层沉积物中的PAHs在一定程度上可能会对该海域生物产生不利影响;生物样品PAHs的苯并（a）芘等效浓度值相对较高,长期食用这些水产品可能会有潜在的健康风险.
In order to assess contamination by polycyclic aromatic hydrocarbons （PAHs） , surface sediments and marine organism samples of fish, shrimp and shellfish were collected from the Dapeng Bay, Shenzhen in October 2011. Concentrations fof sixteen priority PAHs were determined by gas chromatography and mass spectrometry （GC-MS）. The total concentrations of PAHs （ ∑ PAHs ） ranged from 216.56 ng.g-1 to 1 314. 92 ng.g-1 dry weight in sediment samples and from 70. 88 ng-g-1 to 251.90 ng.g-1 wet weight in biological samples, respectively. The mean concentration was the highest in fish （171.52 ng＇g-1）, followed by mussel （ 134.75 ng-g-1 ） and shrimp （ 123.35 ng-g-1 ） in the studied marine organisms. Compared with those in other water bodies around the world, PAHs pollution in the studied area was at medium level. The dominant fraction in the surface sediments was the 4-ring PAHs. Identification of PAH sources suggested that PAHs in Dapeng Bay were likely originated from both pyrolytic and petrogenic sources. The most abundant PAHs were 3-ring PAHs in the tissues of organisms, which may be governed by their feeding behaviors, habitats, and bioavailability of PAHs. Ecological risk assessment indicated that PAHs in surface sediments might have adverse impacts on local ecosystem. Health risk analysis revealed that the potency equivalent concentrations of BaP to the total PAHs in marine organisms from Dapeng Bay were relatively high and may cause some concerns on human health by consumption.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2013年第10期3832-3839,共8页
Environmental Science
基金
国家科技支撑计划重大项目(2009BADB7B02)
中央级公益性科研院所基本科研业务费专项(2012TS15,2012TS25)
关键词
大鹏湾
沉积物
生物体
多环芳烃
风险评价
Dapeng Bay
sediment
marine organism
polycyclic aromatic hydrocarbons
risk assessment
作者简介
孙闰霞（1987-），女，硕士研究生，主要研究方向为渔业生态环境质量安全，E-mail：srx0815@163．com
通讯联系人，E-mail：linqinscs@21ca．com
