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The scientists found that in some lakes away from mercury pollution sources in North America and Northern Europe, some fish mercury content is much more than the consumption of the aquatic mercury content standards recommended by the World Health Organization, the scientific issues caused by the scientists on the water environment system great concern in the biogeochemical cycling of mercury. Xiaolangdi Reservoir Zhengzhou City, centralized source of drinking water, has a vital social and economic function. This study in April 2009, May 2010 and November, respectively, of the reservoir in different depth of the water column of mercury, methylmercury, selenium, manganese, cadmium, iron, arsenic, chromium, copper, zinc, lead and fluoride content distribution characteristics to conduct a detailed study to draw the following conclusions: 1 Xiaolangdi Reservoir Pearl Island, Los bath and the dam before total mercury concentration range is of 5.7 ~ 21.6ng / L, 5.2 44.4ng / L and 6.7 ~ 43.9ng / L, mean for 11.6ng / L, 13ng / L and 19.5ng / L Xiaolangdi Reservoir Pearl Island, Los bath and dam methylmercury concentration range were 0.02 to 0.1 ng / L, 0.02 to 0.07 ng / L and 0.01 ~ 0.07ng / L, mean 0.045ng / L, 0.039ng / L and 0.037ng / L, the percentage of methylmercury to total mercury was 0.35%, 0.47% and 0.21%, respectively. The Xiaolangdi Reservoir mercury pollution. Xiaolangdi Reservoir in the concentration of total mercury in water is less than the present, China Environmental Quality Standard (GB3838-2002) prescribed limit the mercury content of the surface water standard (50ng / L) higher than the rest of the world's natural water body. 2, from upstream to downstream direction, the average concentration of total mercury in the Xiaolangdi Reservoir water turn increases total mercury concentration before the dam is the largest Los bath total mercury concentration slightly above the Pearl Island, and water depths of 16 meters in Los bath total mercury concentration. The main river water total mercury concentration greater than the concentration of total mercury in water tributaries Gushan Gorge. Xiaolangdi Reservoir near the bottom of the water body total mercury concentration is relatively high .3, Xiaolangdi reservoir from the upstream to the downstream direction, the average concentration of methylmercury little change, will not change much the Xiaolangdi Reservoir methylmercury concentration with depth. Most surface high concentration of methylmercury. Pearl Island, Los bath and water before the dam of total mercury and methylmercury was no significant correlation. 5, Xiaolangdi Basin on the main river (the Pali Gap Nagaizumi Furuwatari, Pearl Island, Zhang Ling dam ago) of other trace elements concentration greater than the concentration of other trace elements in the tributaries (Gushan Gorge and the Dragon and Gap). The Xiaolangdi Reservoir water arsenic, selenium, zinc, copper, manganese, cadmium, chromium, lead and trace element concentrations were lower than the national drinking water source quality standards.
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