Mercury and methylmercury in Hudson River sediment: impact of tidal resuspension on partitioning and methylation

被引：80

作者：

Heyes, A ^{[1
]}

Miller, C ^{[1
]}

Mason, RP ^{[1
]}

机构：

[1] Univ Maryland, Chesapeake Biol Lab, Ctr Environm Sci, Solomons, MD 20688 USA

来源：

MARINE CHEMISTRY | 2004年 / 90卷 / 1-4期

关键词：

mercury; methylmercury; sediments; resuspension; estuary;

D O I：

10.1016/j.marchem.2004.03.011

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The Hudson River estuary is highly polluted with heavy metals, polychlorinated biphenyls (PCBs) and PAHs. The sediment of the estuary is subjected to substantial erosion and redeposition resulting in a complex redistribution of sediment annually. Understanding the fate of heavy metals during tidal resuspension is crucial to assessing the long-tern fate of pollutants in the estuary. We examined the impact of sediment resuspension on Hg cycling within the estuarine turbidity maximum (ETM) of the Hudson River estuary. Concentrations of total mercury (T-Hg) in the ETM sediment averaged 5 nM g(-1) in the upper 25 cm of sediment. We measured no desorption of Hg from the sediment during a tidal cycle. Therefore, release of mercury from the ETM of the Hudson River is dependent on sediment efflux. Methylmercury (MeHg) concentrations average 6.5 pM g(-1) and although high for estuarine sediments, the percent T -Hg that is MeHg was lower than what has been observed in less contaminated systems. Mercury methylation is active throughout the upper 25 cm resulting in a large pool of MeHg in ETM sediment. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：75 / 89

页数：15

共 33 条

[1] CIRCULATION IN HUDSON ESTUARY [J].

ABOOD, KA .

ANNALS OF THE NEW YORK ACADEMY OF SCIENCES, 1974, 250 (MAY24) :39-111

[2]

ADAMS DA, 1998, EPA902R98001

[3] Sulfide controls on mercury speciation and bioavailability to methylating bacteria in sediment pore waters [J].

Benoit, JM ;

Gilmour, CC ;

Mason, RP ;

Heyes, A .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1999, 33 (06) :951-957

[4] Constants for mercury binding by dissolved organic matter isolates from the Florida Everglades [J].

Benoit, JM ;

Mason, RP ;

Gilmour, CC ;

Aiken, GR .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2001, 65 (24) :4445-4451

[5]

Benoit JM, 2003, ACS SYM SER, V835, P262

[6] Distribution and possible sources of organochlorine residues in sediments of a large urban estuary, Port Jackson, Sydney [J].

Birch, GF ;

Taylor, SE .

AUSTRALIAN JOURNAL OF EARTH SCIENCES, 2000, 47 (04) :749-756

[7] DETERMINATION OF PICOGRAM LEVELS OF METHYLMERCURY BY AQUEOUS PHASE ETHYLATION, FOLLOWED BY CRYOGENIC GAS-CHROMATOGRAPHY WITH COLD VAPOR ATOMIC FLUORESCENCE DETECTION [J].

BLOOM, N .

CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1989, 46 (07) :1131-1140

[8] Speciation and cycling of mercury in Lavaca Bay, Texas, sediments [J].

Bloom, NS ;

Gill, GA ;

Cappellino, S ;

Dobbs, C ;

McShea, L ;

Driscoll, C ;

Mason, R ;

Rudd, J .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1999, 33 (01) :7-13

[9]

Bono A.B., 1997, THESIS MCGILL U

[10]

BROUWER H, 1994, ENVIRON TOXICOL CHEM, V13, P1273, DOI 10.1897/1552-8618(1994)13[1273:DMFTDO]2.0.CO

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