Occurrences of dissolved trace metals (Cu, Cd, and Mn) in the Pearl River Estuary (China), a large river-groundwater-estuary system

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	Occurrences of dissolved trace metals (Cu, Cd, and Mn) in the Pearl River Estuary (China), a large river-groundwater-estuary system
	Wang, Deli ; Lin, Wenfang ; Yang, Xiqian ; Zhai, Weidong ; Dai, Minhan ; Chen, Chen-Tung Arthur ; Wang DL(王德利)
刊名	http://dx.doi.org/10.1016/j.csr.2012.10.009
	2012-12-15
关键词	SOUTH CHINA INORGANIC CARBON HEAVY-METALS SUBTERRANEAN ESTUARY GIRONDE ESTUARY HUDSON RIVER SEA DELTA NUTRIENT WATER
英文摘要	National Basic Research Program of China [2009CB421204]; National Science Foundation of China [41176060, 40810069004]; Foundation for University Key Teacher by the Ministry of Education [IRT0941]; Fundamental Research Funds for the Central Universities in Xiamen University [2010121033]; This study for the first time examined dissolved metals (Cu, Cd, and Mn) together with dissolved oxygen and carbonate system in the whole Pearl River Estuary system, from the upper rivers to the groundwater discharges until the estuarine zone, and explored their potential impacts in the adjacent northern South China Sea (SCS) during May-August 2009. This river-groundwater-estuary system was generally characterized by low dissolved metal levels as a whole, whilst subject to severe perturbations locally. In particular, higher dissolved Cu and Cd occurred in the North River (as high as 60 nmol/L of Cu and 0.99 nmol/L of Cd), as a result of an anthropogenic source from mining activities there. Dissolved Cu levels were elevated in the upper estuary near the city of Guangzhou (Cu: similar to 40 nmol/L), which could be attributable to sewage and industrial effluent discharges there. Elevated dissolved metal levels (Cu: similar to 20-40 nmol/L; Cd: similar to 02-0.8 nmol/L) also occurred in the groundwaters and parts of the middle and lower estuaries, which could be attributable to a series of geochemical reactions, e.g., chloride-induced desorption from the suspended sediments, oxidation of metal sulfides, and the partial dissolution of minerals. The high river discharge during our sampling period (May-August 2009) significantly diluted anthropogenic signals in the estuarine mixing zone. Of particular note was the high river discharge (which may reach 18.5 times as high as in the dry season) that transported anthropogenic signals (as indicated by dissolved Cu and Cd) into the adjacent shelf waters of the northern SCS, and might have led to the usually high phytoplankton productivity there (chlorophyll-a value > 10 mu g/L). (C) 2012 Elsevier Ltd. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/60585]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Wang, Deli,Lin, Wenfang,Yang, Xiqian,et al. Occurrences of dissolved trace metals (Cu, Cd, and Mn) in the Pearl River Estuary (China), a large river-groundwater-estuary system[J]. http://dx.doi.org/10.1016/j.csr.2012.10.009,2012.
APA	Wang, Deli.,Lin, Wenfang.,Yang, Xiqian.,Zhai, Weidong.,Dai, Minhan.,...&王德利.(2012).Occurrences of dissolved trace metals (Cu, Cd, and Mn) in the Pearl River Estuary (China), a large river-groundwater-estuary system.http://dx.doi.org/10.1016/j.csr.2012.10.009.
MLA	Wang, Deli,et al."Occurrences of dissolved trace metals (Cu, Cd, and Mn) in the Pearl River Estuary (China), a large river-groundwater-estuary system".http://dx.doi.org/10.1016/j.csr.2012.10.009 (2012).