乌江流域东风水库沉积物中汞及甲基汞的时空分布特征  

Spatial and Temporal Distribution of Mercury and Methylmercury in Sediments of the Dongfeng Reservoir,Guizhou Province

作　　者：潘鲁生[1,2] 刘秀伟 石春梅[3] 冯新斌[2] 胡才源 

机构地区：[1]贵州省地质环境监测院,贵阳550004 [2]中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳550002 [3]贵州师范大学,贵阳550001

出　　处：《地球与环境》2012年第2期201-207,共7页Earth and Environment

基　　金：国家自然科学基金重点项目(40532014);中国科学院知识创新工程重要方向资助项目(KZCX3SW-443)

摘　　要：为弄清东风水库水库沉积物中汞及甲基汞的时空分布特征,于春、夏两季对东风水库进行了采样,分别采用王水水浴消解-冷原子荧光法和萃取-乙基化结合GC-CVAFS法测定沉积物总汞和甲基汞的浓度。结果表明,春、夏两季东风水库沉积物的总汞剖面分布特征具有良好的一致性,没有明显的季节性变化;水库沉积物甲基汞浓度表现为夏季略高于春季,中、下游略高于上游,但在垂直方向上的分布规律不明显,并未像其他的水库一样在沉积物剖面中出现峰值。In order to reveal the spatial and temporal distribution of mercury and methylmercury in sediments of the Dongfeng Reservoir,sediment samples were collected in summer and spring.Their mercury and methylmercury concentrations were analyzed by cold vapor atomic fluorescence spectrometry and GC-CVAFS technique,respectively.The results showed that the characteristics of profile distribution of total mercury in the sediments are in good consistency in spring and summer without obvious difference with seasonal change.Methylmercury concentrations in the reservoir sediments in summer were slightly higher than those in spring and the concentrations in middle and down streams were higher than those in upstream.But their distribution in the vertical profile did not display any peak,which was different in the sediments from other reservoirs.

关 键 词：东风水库 沉积物 汞 甲基汞 有机质 

分 类 号：X142[环境科学与工程—环境科学]