State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China.
Environ Monit Assess. 2010 Apr;163(1-4):1-13. doi: 10.1007/s10661-009-0811-2. Epub 2009 Mar 3.
The objectives of this study were to investigate the contamination levels and dispersion patterns of heavy metals and polycyclic aromatic hydrocarbons (PAHs) and to estimate the risk to health effects within the Luanhe river basin of northern Hebei Province, China. Samples of water were collected from upstream to downstream locations, and also from the main tributaries of Luanhe river. After appropriate preparation, all samples were analyzed for eight metals (As, Hg, Cd, Cr, Pb, Cu, Zn, and Fe) and 16 PAHs. Mean concentrations of As, Cd, Cu, and Zn were within the permissible levels, but Hg, Pb, and Fe concentrations were exceeded at some sites. The results indicated that the metal levels of upriver sites were higher than lower river sites; the metal levels of the main river were higher than ones of the tributaries except for Goutaizi at Xiaoluanhe. Only seven out 16 PAH components, which were mostly three- to four-ring compounds, were detected. Predominance of three- to four-ring PAHs suggests relatively recent local sources of PAHs in the study area. The combined hazard index for all metals and PAHs was from 2.26E - 02 to 1.18E - 01, which was lower than 1, suggesting minimal risk to humans. Only Arsenic (As) was evaluated with potential carcinogenic risks of 7.27E - 06 to 2.50E - 05. The study represents the preliminary implementation of a well-defined methodology into the environmental management process and provides a scientific basis for the pollutant controlment order.
本研究的目的是调查重金属和多环芳烃（PAHs）的污染水平和分布模式，并评估河北省北部滦河流域内重金属和多环芳烃对健康的影响风险。从上游到下游位置以及从滦河的主要支流采集了水样。经过适当的准备，对所有样品进行了八种金属（As、Hg、Cd、Cr、Pb、Cu、Zn 和 Fe）和十六种 PAHs 的分析。As、Cd、Cu 和 Zn 的平均浓度在允许范围内，但在一些地点 Hg、Pb 和 Fe 的浓度超标。结果表明，上游站点的金属水平高于下游站点；除小滦河的沟台子外，主要河流的金属水平高于支流。在所检测的 16 种 PAH 成分中，只有七种主要是三到四环化合物。三环和四环 PAHs 的优势表明，在所研究地区，PAHs 的近期本地来源。所有金属和 PAHs 的综合危害指数为 2.26E-02 至 1.18E-01，低于 1，表明对人类的风险很小。只有砷（As）被评估为具有潜在致癌风险，从 7.27E-06 到 2.50E-05。本研究代表了将明确界定的方法初步应用于环境管理过程，并为污染物控制顺序提供了科学依据。
