Speciation and spatial-temporal variation of mercury in the Xiaolangdi Reservoir

• Published in: Huanjing kexue Vol. 36; no. 1; p. 121
• Main Authors: Cheng, Liu, Mao, Yu-xiang, Ma, Bing-juan, Wang, Mei
• Format: Journal Article
• Language: Chinese
• Published: China 01.01.2015
• Subjects: Animals; China; Environmental Monitoring; Fishes; Fresh Water - chemistry; Mercury - analysis; Methylmercury Compounds - analysis; Spatio-Temporal Analysis; Water Pollutants, Chemical - analysis; China
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.2015.01.016

In order to investigate the occurrence status of mercury in Xiaolangdi Reservoir, water, surface sediments, pore water and fish samples were collected and analyzed for the contents of total mercury (THg) and methylmercury (MeHg). Cold vapor atomic fluorescence spectrometry and aqueous phase ethylation derivatization-gas chromatography-atomic fluorescence spectrometry methods were used for the analysis of THg and MeHg, respectively. Bioaccumulation of THg in fish of Xiaolangdi Reservoir was then discussed. It was found that THg contents in water were 0.71-1.42 ng x L(-1) and 0.90-2.49 ng x L(-1) during dry and wet seasons, respectively, while the MeHg content in water was below the method detection limit. The THg content in water during both seasons could meet the requirement of Class I criterion of national surface water environmental quality standard (GB 3838-2002). The THg contents in sediments were 95.66-172.52 ng x g(-1) and 51.74-90.42 ng x g(-1), while the MeHg contents in the corresponding sediment sam