珠江口八大口门PAHs时空分布特征  

Spatial and temporal characteristics of PAHs in the eight main entrances of Pearl River Estuary

作　　者：张菲菲[1,2] 唐玉光 孙培艳 王鑫平[4] 李一鸣[1,2] 陆金仁[2] 包木太[1,2] ZHANG Feifei;TANG Yuguang;SUN Peiyan;WANG Xinping;LI Yiming;LU Jinren;BAO Mutai(Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China,Qingdao,266100,China;College of Chemistry&Chemical Engineering,Ocean University of China,Qingdao,266100,China;Shouguang Marine Fishery Development Center,Weifang,262700,China;Key Laboratory of Ecological Warning,Protection&Restoration for Bohai Sea,Ministry of Natural Resources,SOA,Qingdao 266100,China)

机构地区：[1]中国海洋大学海洋理论与工程技术教育部重点实验室海洋高等研究院,青岛266100 [2]中国海洋大学化学化工学院,青岛266100 [3]寿光市海洋渔业发展中心,潍坊262700 [4]自然资源部渤海生态预警与保护修复重点实验室,国家海洋局北海环境监测中心,青岛266100

出　　处：《环境化学》2023年第3期863-872,共10页Environmental Chemistry

基　　金：自然资源部渤海生态预警与保护修复重点实验室2022年开放基金(2022103)资助.

摘　　要：2019年2月、4月、8月和10月分别采集了珠江口八大口门入海口海水样品,采用气相色谱方法对10种多环芳烃(PAHs)(萘、苊、苊烯、芴、菲、蒽、荧蒽、芘、苯并蒽、䓛)进行定量源解析,PAHs的检出率较高,表明PAHs在八大口门海域水体中普遍存在.在空间分布上,鸡啼门、虎门海域水体PAHs含量相对较高,蕉门、磨刀门、虎跳门和崖门居中,洪奇门和横门相对较少.各口门PAHs含量呈现明显的表底分层现象,八大口门表层水PAHs的浓度范围为ND—27260.00 ng·L^(−1),最大值出现在虎跳门4月份水样;底层水PAHs的浓度范围为ND—31175.00 ng·L^(−1),最大值出现在鸡啼门10月份水样.在时间分布上,各口门表、底层海水PAHs含量平均值均呈现出8月份最小的特征,是由于8月雨量大,雨水冲刷及径流作用增大,对入海口区域污染物进行一定程度的稀释.从来源上看,八大口门海水中PAHs的来源主要为交通、煤焦油炼制、化石燃料的燃烧及加工炼制、木材燃烧、煤炭燃烧、油类不完全燃烧及油类泄漏混合污染等.研究珠江口八大口门入海口水体多环芳烃污染情况,对珠江三角洲生态环境保护和治理具有重要意义.In February,April,August,and October 2019,seawater samples were collected from the eight entrances of the Pearl River Estuary.Gas chromatography was used to quantitatively analyze 10 polycyclic aromatic hydrocarbons(PAHs)(naphthalene,acenaphthene,acenaphthylene,fluorene,phenanthrene,anthracene,fluoranthene,pyrene,benzoanthracene,chrysene).The detection rate of PAHs is high,indicating that PAHs are widespread in the water body of the eight entrances.In terms of spatial distribution,the content of PAHs in the waters of Jiti men and Hu men was relatively high,Jiao men,Modao men,Hutiao men,and Ya men were in the middle,and Hongqi men and Heng men were relatively few.The concentration of PAHs in the surface water of the eight gates ranged from ND—27260.00 ng·L_(−1),and the maximum value appeared in the water sample of Hutiao men in April.The concentration range of PAHs in bottom water was ND—31175.00 ng·L^(−1),and the maximum value appeared in the Jiti men water sample in October.In terms of time distribution,from the perspective of time distribution,the average value of PAHs content in the surface and bottom seawater of each entry shows the smallest feature in August,which is due to the large rainfall in August,the increase of rainwater erosion and runoff,and the dilution of pollutants in the estuary area to a certain extent.From the source point of view,the sources of PAHs in seawater are mainly traffic,coal tar refining,wood combustion,incomplete combustion of oil,coal combustion,and oil leakage mixed pollution of fossil fuel combustion and processing.It is of great significance to study the pollution of polycyclic aromatic hydrocarbons in the water body of the eight entrances of the Pearl River Estuary for the protection and treatment of the ecological environment in the Pearl River Delta.

关 键 词：珠江口 八大口门 入海口 PAHS 时空分布 

分 类 号：X592[环境科学与工程—环境工程] X55