J. Phys. IV France 107 (2003) 679
The distribution and speciation of mercury in Wujiang riverH. Jiang1, 2, X. Feng1, Q. Dai1, 2, F. Tao1 and C. Liu1
1 State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002, China
2 Graduate School, Chinese Academy of Science, Beijing 100039, China
Concentrations of reactive, dissolved, particulate and total mercury in water samples were determined at 41 locations throughout the Wujiang River Basin, China. The sampling campaign was carried out July 2002. During the collection of water samples for Hg analyses, other parameters were measured in situ (dissolved oxygen, pH, temperature and EC). The average concentration of the reactive mercury in surface water was 1.5 ng L -1. The concentration of total mercury ranged from 10.9 to 329.6 ng L -1, with a geometric mean of 44.4 ng L -1, and the dissolved mercury was from 1.0 to 49.2 ng L -1, with a geometric mean of 7.l ng L -1. The proportion of reactive to total mercury was typically less than 5%, and the particulate to total mercury, with 90% of values higher than 50%. The pilot study indicated that Wujiang River is contaminated by mercury in a certain extent.
© EDP Sciences 2003