区域环境与生态
程远梅,祝凌燕,田胜艳,梁贤伟.海河及渤海表层沉积物中多环芳烃的分布与来源[J].环境科学学报,2009,29(11):2420-2426
海河及渤海表层沉积物中多环芳烃的分布与来源
- Distribution and sources of polycyclic aromatic hydrocarbons in surface sediments from the Haihe River and the Bohai Sea
- 关键词：多环芳烃(PAHs) 表层沉积物 渤海 海河
- 基金项目：国家自然科学基金(No.20677032);天津市科学技术委员会(No.07JCZDJC01900,06TXTJJC14000,08ZCGHHZ01000);国家科技部“十一五”科技支撑计划(No.200603746006);教育部新世纪人才
- 作者
- 单位
- 程远梅
- 南开大学环境科学与工程学院, 教育部环境污染过程与基准重点实验室; 天津市城市生态环境修复与污染防治重点实验室, 天津 300071
- 祝凌燕
- 南开大学环境科学与工程学院, 教育部环境污染过程与基准重点实验室; 天津市城市生态环境修复与污染防治重点实验室, 天津 300071
- 田胜艳
- 南开大学环境科学与工程学院, 教育部环境污染过程与基准重点实验室; 天津市城市生态环境修复与污染防治重点实验室, 天津 300071
- 梁贤伟
- 南开大学环境科学与工程学院, 教育部环境污染过程与基准重点实验室; 天津市城市生态环境修复与污染防治重点实验室, 天津 300071
- 摘要：采集海河和渤海表层沉积物样品,测定16种EPA规定多环芳烃.海河∑PAH含量(干重)范围为445～2185ng·g-1,平均值为964ng·g-1;渤海∑PAH含量范围为171～290ng·g-1,平均值为226ng·g-1.海河塘沽区段和天津市区段沉积物中∑PAH含量比郊区段含量高.LMW/HMW(低分子质量/高分子质量)和异构体比值分析表明,生物质及煤的燃烧为海河表层沉积物中PAHs主要来源;对于渤海湾大部分区域来说,石油污染是其PAHs的主要来源,而热解来源的PAHs主要以生物质及煤的燃烧为主;滨海旅游度假村附近海域因受旅游活动影响而燃烧源的贡献较大.风险评价表明,海河及部分渤海海域存在潜在生态危害,滨海村附近海域存在潜在生态风险可能性较低.
- Abstract：Surface sediment samples were collected and analyzed by GC/MS for 16 priority polycyclic aromatic hydrocarbons(PAHs).The sum of 16 PAH concentrations(∑PAH16)in the Haihe River and the Bohai Sea varied in the range of 445～2185 ng·g-1 dry weight(dw)and 171～290 ng·g-1 with mean values of 964 ng·g-1 and 226 ng·g-1 respectively.For the Haihe River,(PAHs in the urban district of Tianjin and the Tanggu region were higher than in the rural area.The ratios of LWM/HWM(low-molecular-weight PAH /high-molecular-weight PAH)and isomer ratios were employed to diagnose the possible sources of PAHs.The results indicated that biomass(grass,wood)and coal combustion were the major sources of PAHs in the sediment of the Haihe River.For most areas of the Bohai Sea,PAHs mainly came from petrogenic sources;while in the Binhai resort area coal combustion contributes more PAHs due to tourism activities.Probability risk assessment suggested that PAHs in the sediments of the Haihe River and part of the Bohai Sea pose a potential ecological risk;but in the adjacent Binhai resort area,low PAH ecological risk was predicted.
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