Damming effect on the distribution of mercury in Wujiang River   总被引：2，自引：0，他引：2  

蒋红梅冯新斌  戴前进 《中国地球化学学报》2005,24(2):179-183

Seasonal changes in total mercury concentrations in surface water were observed for the Wujiang River, with higher values at the time of greater flow. The total mercury in this river was mostly associated with suspended particles, particulate mercury accounting for 84% of the total mercury flux on average during the high flow period, and 52% of the total mercury flux on average in the low flow period. Significant losses of Hg from the water were observed in the downstreams of the reservoir. In addition, the concentrations of particulate mercury in the downstreams of reservoir appeared to have been enhanced by sediment re-suspension and shoreline erosion caused by flood discharge, while the filtered portion decreased. These observations suggested that reservoirs played an important role in controlling the transport and fate of mercury in the Wujiang River.  相似文献   

西南喀斯特地区表生生态环境中汞的生物地球化学研究进展     

冯新斌  汤顺林  仇广乐  商立海  闫海鱼  蒋红梅  王少锋  李广辉  李仲根  李平  侯亚敏  戴前进  郑伟  何天容  付学吾  万奇 《矿物岩石地球化学通报》2006,25(Z1):20-22

汞的污染已经引起地学和环境工作者的关注,尤其是作为全球两大汞-锑矿带之一的我国西南地区.近年来,我们系统研究了西南地区自然过程和人为活动向大气的排汞通量、土法炼锌和土法炼汞对生态环境的影响、大规模汞矿开采造成的环境汞污染、高汞背景和多汞污染来源地区水库汞的生物地球化学循环演化特征.研究表明,无论自然过程还是人为活动,西南地区尤其是贵州省是全球大气汞的重要释放源;矿业开采造成了严重的环境汞污染,对当地居民的身体健康构成了严重的危害;这一地区的新建水库是汞甲基化的重要场所,对生态环境有潜在的危害.  相似文献   

水库汞生物地球化学循环研究进展   总被引：4，自引：0，他引：4       下载免费PDF全文

蒋红梅  冯新斌 《水科学进展》2007,18(3):462-467

对近年来国内外有关水库汞生物地球化学循环的研究现状进行了综述,主要从基质释汞行为、汞释放对水体的影响、汞在水库水生食物链中的迁移富集和水库对河流汞输送的影响等四个方面进行了探讨,并指出该领域研究工作的薄弱环节及发展方向.  相似文献   

The concentrations and distribution of mercury in aquatic ecosystem of Baihua Reservoir   总被引：1，自引：0，他引：1  

YAN Haiyu 《中国地球化学学报》2005,24(4):377-381

1Introduction Thebiogeochemicalcycleofmercuryinaqueous systemisthekeyfactorleadingtotheexpansionof mercurypollutiononaglobalscaleandthesafetyof fishconsumers.Dissolvedgaseousmercury(DGM)e vasionisconsideredasoneofthemostimportantmer curysourcesforatmosphere.Atthesametime,this procedurewillreducetheHgburdeninthewatercol umnandmaythusdecreasemethylmercuryproduction andaccumulationinfish(Nriagu,1994).TheBaihua ReservoirissituatedinGuizhouProvince,andithas sufferedseriousmercurycontaminationfr…  相似文献