中文摘要：

利用等离子质谱仪（ICP-MS）等分析技术,对湘江长株潭河段沉积物进行稀土元素、重金属元素和高场强元素地球化学分析.结果表明,沉积物中稀土元素LREE富集,HREE亏损,Eu异常明显,球粒陨石标准化曲线呈向右倾斜的富LREE模式.地累积指数法（Igeo）评价显示,沉积物存在Cu、Zn、Pb等元素组成的重金属污染,各河段沉积物中重金属的复合污染状况排序为：株洲河段〉湘潭河段〉长沙河段.稀土元素与重金属元素的地累积指数（Igeo）的Pearson相关分析显示,沉积物的稀土总量∑REE、 Eu负值与重金属污染之间有较好的相关性,这可能与两者具有相似的低溶解度和稳定不活泼的环境地球化学特征有关.因子分析表明高稀土含量可能是高自然背景值和人为污染的结果,HREE与重金属元素的地累积指数显示较高相关性,意味着HREE含量越高,重金属污染就可能会越严重.沉积物的∑REE及 Eu等参数值可作为指示沉积物重金属污染的地球化学指标,对沉积物重金属污染有一定的指示作用.

英文摘要：

Concentrations of rare earth elements, heavy metals and high field strength element in sediments from the Changsha - Zhuzhou - Xiangtan section of the xiangjiang river were analyzed by Inductively coupled plasma mass spectrometry （ICP - MS）. Results showed that the chondrite - normalized REE patterns are characterized by LREE rich right curves in the sediments of all samples, with LREEs＇ enrichment relative to HREEs （ LaN/YbN = 6. 9 - 9.9）, fairly flat HREEs＇ patterns （ GdN/YbN = 1.29 - 1.62 ） and ubiquitous Eu negative anomaly. The heavy metal contamination in the sediments is evaluated using the geo - accumulation index （ I geo） method, and the results suggest that the sediments were contaminated by heavy metals Cu, Zn, and Pb seriously. The decreasing order of the degree of heavy metal integrative pollution is as follows： Zhuzhou 〉 Xiangtan 〉 Changsha. Pearson correlation analysis are used to get more information between Rare earth elements and accumulation index （ I geo） of heavy metals, the results show that there is good correlation between ∑REE of sediments, Eu/Eu ＊ negative and heavy metal pollution , which may due to they have similar low solubility and stability of inert environment geochemistry characteristic. Factor analysis indicated that high content of REE may be high natural background and anthropogenic pollution results; The parameter of ∑ REE, Eu et al can be used as a geochemical indicator to heavy metal contamination and those special elements may indicate the heavy metal contamination.