Tracing aquatic bioavailable Hg in three different regions of China using fish Hg isotopes

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Tracing aquatic bioavailable Hg in three different regions of China using fish Hg isotopes
	Liu, Hong-Wei; Jiang, Gui-Bin; Shi, Jian-Bo; Hu, Li-Gang; Yin, Yong-Guang; Wang, Ding-Yong; Mao, Yu-Xiang; Yu, Ben; Hua, Xiu-Bing; Liu, Cheng-Bin
刊名	ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
	2018-04-15
卷号	150 页码:327-334
关键词	Mercury Isotopic compositions Fish Tibetan Plateau Three Gorges Reservoir Chinese Bohai Sea
ISSN号	0147-6513
文献子类	Article
英文摘要	To trace the most concerned bioavailable mercury (Hg) in aquatic environment, fish samples were collected from three typical regions in China, including 3 rivers and 1 lake in the Tibetan Plateau (TP, a high altitude background region with strong solar radiation), the Three Gorges Reservoir (TGR, the largest artificial freshwater reservoir in China), and the Chinese Bohai Sea (CBS, a heavily human-impacted semi-enclosed sea). The Hg isotopic compositions in fish muscles were analyzed. The results showed that anthropogenic emissions were the main sources of Hg in fish from TGR and CBS because of the observed negative delta Hg-202 and positive Delta Hg-199 in these two regions (TGR, delta Hg-202: - 0.72 to - 0.29%, Delta Hg-199: 0.15 - 0.52 parts per thousand; CBS, delta Hg-202: - 2.09 to - 0.86 parts per thousand, Delta Hg-199: 0.07 - 0.52 parts per thousand). The relatively higher delta Hg-202 and Delta Hg-199 (delta Hg-202: - 0.37 - 0.08 parts per thousand, Delta Hg-199: 0.50 - 1.89 parts per thousand) in fish from TP suggested the insignificant disturbance from local anthropogenic activities. The larger slopes of Delta Hg-199/Delta(201) g in fish from TGR (1.29 +/- 0.14, 1SD) and TP (1.25 +/- 0.06, 1SD) indicated methylmercury (MeHg) was produced and photo-reduced in the water column before incorporation into the fish. In contrast, the photoreduction of Hg2+ was the main process in CBS (slope of Delta Hg-199/Delta Hg-201: 1.06 +/- 0.06, 1SD). According to the fingerprint data of Hg isotopes, the most important source for aquatic bioavailable Hg in TP should be the long-range transported Hg, contrasting to the anthropogenic originated MeHg from surface sediments and runoffs in TGR and inorganic Hg from continental inputs in CBS. Therefore, the isotopic signatures of Hg in fish can provide novel clues in tracing sources and behaviors of bioavailable Hg in aquatic systems, which are critical for further understanding the biogeochemical cycling of Hg.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41075]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Liu, Hong-Wei,Jiang, Gui-Bin,Shi, Jian-Bo,et al. Tracing aquatic bioavailable Hg in three different regions of China using fish Hg isotopes[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2018,150:327-334.
APA	Liu, Hong-Wei.,Jiang, Gui-Bin.,Shi, Jian-Bo.,Hu, Li-Gang.,Yin, Yong-Guang.,...&Liu, Cheng-Bin.(2018).Tracing aquatic bioavailable Hg in three different regions of China using fish Hg isotopes.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,150,327-334.
MLA	Liu, Hong-Wei,et al."Tracing aquatic bioavailable Hg in three different regions of China using fish Hg isotopes".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 150(2018):327-334.