Lu Xiaoxia, Chen Chaoqi, Zhang Shu, Hou Zhen, Yang Junjun
Ministry of Education Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
ScientificWorldJournal. 2013;2013:417435. doi: 10.1155/2013/417435. Epub 2013 Jan 16.
Sediments were sampled from different surface water bodies in Tianjin coastal area, China, and persistent organic pollutants (POPs) including polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polybrominated diphenyl ethers (PBDEs) were measured using GC/MS or GC/ECD. The purposes were to investigate the concentration levels of the POPs and to assess their ecological risks. The results showed that all the 16 priority PAHs were detected from the 10 sediments sampled with the total concentrations of the 16 PAHs ranging from 274.06 μg/kg to 2656.65 μg/kg, while the concentrations of the halogenated POPs were generally low except in the Dagu waste discharging river where the total concentrations of 24 OCPs, 35 PCBs, and 14 PBDEs were 3103.36 μg/kg, 87.31 μg/kg, and 13.88 μg/kg, respectively. In the studied sediments, PAHs exhibited risks to benthonic organisms; particularly the concentrations of naphthalene and/or acenaphthene exceeded their probable effect concentrations in several locations. In comparison, only in the Dagu waste discharging river, OCPs exhibited risks with the concentrations of heptachlor epoxide and lindane exceeding their probable effect concentrations. PCBs and PBDEs posed rare risks in the studied area.
在中国天津沿海地区的不同地表水体采集沉积物样本，采用气相色谱/质谱联用仪（GC/MS）或气相色谱/电子捕获检测器（GC/ECD）测定包括多环芳烃（PAHs）、有机氯农药（OCPs）、多氯联苯（PCBs）和多溴二苯醚（PBDEs）在内的持久性有机污染物（POPs）。目的是调查POPs的浓度水平并评估其生态风险。结果表明，在所采集的10个沉积物样本中均检测到了全部16种优先控制PAHs，16种PAHs的总浓度范围为274.06μg/kg至2656.65μg/kg，而卤代POPs的浓度总体较低，不过在大沽排污河中除外，其中24种OCPs、35种PCBs和14种PBDEs的总浓度分别为3103.36μg/kg、87.31μg/kg和13.88μg/kg。在所研究的沉积物中，PAHs对底栖生物存在风险；特别是萘和/或苊的浓度在几个地点超过了其可能效应浓度。相比之下，仅在大沽排污河中，OCPs存在风险，环氧七氯和林丹的浓度超过了其可能效应浓度。PCBs和PBDEs在研究区域造成的风险较小。
