Characteristics of polycyclic aromatic hydrocarbons in the air-sea interface in Xiamen sea areas

多环芳烃（PAHs）是近海海洋环境中广泛分布的一类持久性有机污染物，而PAHs在海-气界面环境中的存在与分布影响着PAHs海-气交换的方向和通量，进而影响着PAHs的海洋生物地球化学行为。本研究采集了厦门周围海域夏季13个站点的微表层和表层海水样品，并在鼓浪屿海洋环境监测站进行了冬夏两季定点连续监测，几乎同步采集了海水微表层、表层（连续3d）以及大气样品（连续10d），对PAHs在溶解相和颗粒相、气相和气溶胶中的含量分布及其昼夜变化和季节变化特征进行了分析，初步估算了厦门海域PAHs的海-气交换通量。取得以下结果：1．厦门海域夏季海水样品无论是表层还是微表层，溶解相PAHs总量（ΣPAHs）（...Polycyclic aromatic hydrocarbons (PAHs) are a group of persistent organic pollutants (POPs) which are known to be present worldwide in coastal waters. The levels and distributions of PAHs in the air-sea interface can affect the exchange direction and flux of vapor PAHs, and the biogeochemical behavior of PAHs in the marine environment. The surface microlayer and surface layer seawater samples f...学位：工学硕士院系专业：海洋与环境学院环境科学研究中心_环境科学学号：20033403

Analysis on Hydrocarbons Pollution in Vehicle Exhausts in Xiamen City

[摘要]：通过厦门市仙岳隧道实验建立了厦门市机动车尾气源饱和烃( 正构烷烃、甾萜类化合物等) 及多 环芳烃等主要烃类污染物的特征排放谱, 得出厦门市隧道尾气PM10 中PAHs 的苯并[ a ] 芘等效毒性 (BEQ) ( 3. 99) 约为厦门城市大气的2. 5 倍, 对人体健康威胁更大. 同时估算出汽油车和柴油车对厦门大气 机动车尾气排放PAHs 的贡献率分别约为70%和30%.[Abstract]:Tunnel study was carried out in Xianyue tunnel in Xiamen city to characterize the emission of saturated hydrocarbons and polycyclic aromatic hydrocarbons ( PAHs) from vehicles. The contents and the profiles of these pollutants were given in this paper. T he value of BEQ of PAHs in Xianyue tunnel air was 3. 99, which was about 2. 5 times that in Xiamen City which brought higher threat to human health. Results showed the contributions of emission from gasoline-engined vehicles and diesel-engined vehicles to the PAHs in Xiamen city air have been quantified to be about 70% and 30%.国家自然科学基金资助项目( 202777060) ; 成都信息工程学院引进人才科研启动项目基金资助( KYTZ200806

Characteristics of PAHs in PM_(10) aerosols collected from different districts in Xiamen

2004年冬季在厦门市4个不同功能区连续10d采集并分析了PM10中16种优控多环芳烃(PAHs).研究发现,各个功能区大气PM10中多环芳烃总浓度(ΣPAHs)存在明显差别工业区(湖里)10.87~27.54ng·m-3、旅游区(鼓浪屿)7.79~21.14ng·m-3、居民区(洪文)6.52~13·39ng·m-3、森林区(小坪)5.20~11.43ng·m-3;但各个功能区PM10中各种PAH化合物的相对组成趋于一致,所占比例最高的前4种化合物为菲、芘、和芴,表明冬季不同功能区PM10中PAHs的主要污染来源在很大程度上相似或相同.根据典型污染来源中特征化合物比值如苯并(a)蒽/、荧蒽/芘和芘/苯并(a)芘及其有机碳/元素碳的值,推断厦门市PM10中的PAHs主要来源于汽车尾气的排放. 【英文摘要】 An intensive sampling program has been undertaken in the absence of precipitation at four different sites, Xiamen, to characterize the atmospheric concentration of 16 priority polycyclic aromatic hydrocarbons in PM_ 10 aerosols during 2004 winter. There was significant difference in the average value of ΣPAHs (defined as the sum of 16 PAH compounds) during the sampling time among four sites. ΣPAHs value is as follows: Huli at 10.9~27.5 ng·m -3 , Gulangyu at 7.8~21.1 ng·m -3 , Hongwen at 6.5~13.4 ng·m -3 , a...国家自然科学基金项目(No.40476048)~

Estimation of the sources of organophosphorus pesticides in Xiamen sea area,

利用SPEGCFPD对厦门附近海域的微表层、表层、底层海水及九龙江入海口高、低潮水中有机磷农药进行了分析.结果表明,有机磷农药的含量范围为:低于检测限～725.54ng·L-1,平均值为136.47ng·L-1.研究海区中马銮内湾有机磷农药污染最为严重(165.77～453.42ng·L-1,平均296.01ng·L-1),九龙江口、西海域和西南海域污染水平接近(16.26～200.65ng·L-1,平均84.59ng·L-1),东部海域有机磷农药污染最轻(10.38～66.01ng·L-1,平均38.14ng·L-1).九龙江入海口高潮水中农药的浓度明显低于低潮水中浓度,说明海域中多数农药污染来源于九龙江流域输入,少数农药来源于海域周边地区或九龙江流域和海域周边地区共同输入,微表层对有机磷农药的富集作用不明显. 【英文摘要】 Organophosphorus Pesticides (OPPs) were determined in microsurface water, subsurface water and bottom water in Xiamen sea area with SPE-GC-FPD. The result showed that the levels of all OPPs ranged from below detection limit to 725.54ng·L -1, the mean was 136.47ng·L -1. The pollution in Maluan Bay was the most serious(165.77～453.42ng·L -1,mean 296.01ng·L -1) and the Eastern Sea was the slightest(10.38～66.01ng·L -1,mean 38.14ng·L -1). Meanwhile, the levels of OPPs in Jiulong estuary were closed to that in the...国家自然科学基金(No.40106012)~

HEALTH RISK ASSESSMENT OF PRIORITY POLYCYCLIC AROMATIC HYDROCARBONS IN PM_(10) IN XIAMEN CITY——BEQ EVALUATION

通过比较城市大气PM10中优控PAHs的总量、苯并(a)芘(BaP)的浓度水平和BaP的等效致癌毒性(BEQ),评估厦门市大气有机污染的程度及其对人体的健康风险.结果表明,厦门市15种优控PAHs年平均浓度为16.08ng.m-3,BaP年平均浓度为0.70ng.m-3,BEQ为1.58.The concentration and distribution character of priority PAHs in PM_(10)at different function areas of Xiamen city were studied and BEQ was calculated.When comparing with other big cities in China,the concentrations and pollution level(BEQ) of priority PAHs in Xiamen city were lower,with PAHs annual concentration of 16.08ng·m~(-3),BaP 0.70 ng·m~(-3)and BEQ 1.58.It was suggested that monitoring organic toxic pollutants and control must be enhanced based on the evaluation of health risk from PAHs,particularly in those big cities with PAHs concentrations and BEQ higher than the acceptable level.国家自然科学基金(40476048,40106012)资助项

DIURNAL VARIATION OF PRIORITY POLYCYCLIC AROMATIC HYDROCARBONS IN THE ATMOSPHERIC AEROSOL (PM2.5) OF XIAMEN CITY

对厦门市冬季不同功能区大气PM2.5中多环芳烃(PAHs)的昼夜变化特征进行分析.结果表明,在检出的13种PAHs中,总浓度及其组分均呈现明显的差异.PAHs总浓度(ΣPAHs)分布在3.04—12.49ng.m-3;各功能区PAHs以菲、芘和含量相对较高,其中菲占优势,说明厦门市冬季大气PM2.5中PAHs以菲的污染为主.局部地区晚间ΣPAHs的浓度明显高于日间浓度,这可能与夜间大气混合层下降、污染物不易扩散传输、日间PAHs易光降解等有关.21 and 6 hours PM_(2.5) samples were collected and analyzed for 16 priority polycyclic aromatic hydrocarbons(PAHs) from 5 different function zones in Xiamen in December 2004 to characterize their diurnal change.There were significant difference in the values of ΣPAHs(defined as the sum of 13 PAH compounds) among the five sampling sites.Three PAH compounds,phenanthrene,pyrene and chrysene,were the dominant pollutants.ΣPAHs in the day were much lower than those at the night at the following three sites,Huli,International Bank and Hongwen.These indicated that the relative mixed atmosphere and strong photolysis in the day can significantly influence the concentrations of PAHs in the PM_(2.5) in Xiamen.国家自然科学基金(40106012,40476048)资助项