• 关键词：引黄灌区  地表水  溶解态痕量金属  空间分布  来源

• 基金项目：中国科学院"百人计划"项目

• 蔡文静
• 1. 中国科学院地理科学与资源研究所,生态系统网络观测与模拟重点实验室,北京 100101;
  2. 河北师范大学,资源与环境科学学院,石家庄 050024

• 常春平
• 河北师范大学,资源与环境科学学院,石家庄 050024

• 宋帅
• 中国科学院地理科学与资源研究所,生态系统网络观测与模拟重点实验室,北京 100101

• 李静
• 中国科学院地理科学与资源研究所,生态系统网络观测与模拟重点实验室,北京 100101

• 张芳
• 1. 中国科学院地理科学与资源研究所,生态系统网络观测与模拟重点实验室,北京 100101;
  2. 河北师范大学,资源与环境科学学院,石家庄 050024

• 李发东
• 中国科学院地理科学与资源研究所,生态系统网络观测与模拟重点实验室,北京 100101

• 摘要：以黄河下游德州引黄灌区主要水系为研究对象,采集了灌区内36个地表水样,分析了水体中溶解态痕量金属元素Ba、Fe、Li、Mn、Sr、Zn和非金属元素B的含量及其污染状况.借助于空间分析与相关性分析,探讨了其空间分布及来源.结果表明,这几种元素含量的大小顺序为:Sr>B>Ba>Mn>Li>Fe>Zn.根据国家生活饮用水卫生标准(GB5749—2006)和美国环境保护局(EPA)饮用水标准,B、Fe、Mn的超标率分别为50%、2.78%、27.78%.变异系数结果表明各元素都具有显著的空间差异性.漳卫新河B、Fe、Li、Mn含量均最高,重金属污染较为严重.相关性分析结果表明,Li-B、Li-Fe、Li-Mn及Fe-Mn之间呈显著相关,说明这几种元素污染源可能相同.本研究为评价痕量金属污染对地表水环境及人类健康的影响提供科学依据.

• Abstract：In this study, 36 water samples were collected from the surface water system of the Dezhou Irrigation District located in the lower reaches of the Yellow River. The samples were analyzed for the concentrations and contamination levels of dissolved trace metals including Ba, Fe, Li, Mn, Sr, Zn, and non-metal of B by Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). The spatial distribution and sources of the chemical elements were identified using spatial statistical analysis and correlation analysis methods. Results showed that the concentrations of these elements were in the order of Sr>B>Ba>Mn>Li>Fe>Zn. The concentrations of B, Fe, and Mn exceeded the drinking water standards of China (GB5749—2006) and the Environmental Protection Agency(EPA) by 50%, 2.78%, and 27.78%, respectively. The coefficients of variation indicated significant spatial variation for the concentrations of all elements. The concentrations of B, Fe, Li, and Mn from Zhangweixin River were the highest among the samples. The correlation analysis showed that there was positive correlations for the Li-B, Li-Fe, Li-Mn, and Fe-Mn pairs, suggesting that these elements might have a similar source. This study provides scientific information for assessing the impacts of dissolved trace metals on surface water environment and human health in the Dezhou Irrigation District.

• Key words：Dezhou Irrigation District  surface water  dissolved trace metals  spatial distribution  sources

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