Biogeochemical Cycle of Mercury in Reservoir Systems in Wujiang River Basin, Southwest China

Description

This book presents an intensive study on the biogeochemical cycle of mercury in a river-reservoir system in Wujiang River Basin, the upper branch of the Yangtze River. Six reservoirs located in the mainstream of the Wujiang River and their corresponding inflow/outflow rivers were selected for inclusion in this study, which was conducted by researchers from the Institute of Geochemistry, Chinese Academy of Sciences. The concentration and distribution of Hg in reservoirs (the water column, sediment, sediment pore water), inflow/outflow rivers of reservoirs, and wet deposition in Wujiang River Basin were systematically investigated, and measurements were taken of the water/air exchange flux of gaseous elemental mercury (GEM). On the basis of the data gathered, a detailed mass balance of total mercury (THg) and methylmercury (MeHg) in the six reservoirs was developed. In addition, the book identifies the primary factors controlling Hg methylation in the river-reservoir system in Wujiang River Basin. The accumulation and bio-magnification of Hg species within food chains in reservoirs and human health risk of MeHg exposure through fish consumption are also included in this book. Front Matter ....Pages i-ix Introduction (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 1-8 Analysis of Mercury Species in the Environmental Samples (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 9-19 Wet Deposition Flux of Total Mercury and Methylmercury in Wujiang River Basin (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 21-32 Water/Air Mercury Flux in Reservoirs (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 33-65 Mercury in Inflow/Outflow Rivers of Reservoirs (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 67-94 Biogeochemical Process of Mercury in Reservoirs in the Main Stream of the Wujiang River (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 95-199 Biogeochemical Cycling of Mercury in the Hongfeng, Baihua, and Aha Reservoirs (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 201-302 Mercury Mass Balance in Reservoirs with Different Ages (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 303-338 Bioaccumulation of Mercury in Aquatic Food Chains (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 339-389 Primary Factors Controlling Hg Methylation in Reservoirs (Xinbin Feng, Bo Meng, Haiyu Yan, Xuewu Fu, Heng Yao, Lihai Shang)....Pages 391-416