Mercury empirical relationships in sediments from three Ontario lakes

被引：15

作者：

Ethier, A. L. M. ^{[1
]}

Scheuhammer, A. M. ^{[2
]}

Blais, J. M. ^{[1
]}

Paterson, A. M. ^{[3
]}

Mierle, G. ^{[3
]}

Ingram, R. ^{[3
]}

Lean, D. R. S. ^{[1
]}

机构：

[1] Univ Ottawa, Fac Sci, Dept Biol, Ottawa, ON K1N 6N5, Canada

[2] Carleton Univ, Natl Wildlife Res Ctr, Environm Canada, Ottawa, ON K1A 0H3, Canada

[3] Dorset Environm Sci Ctr, Ontario Minist Environm, Dorset, ON P0A 1E0, Canada

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2010年 / 408卷 / 09期

关键词：

Sediment; Lake; Mercury; Redox potential; Organic carbon; Sediment bulk density; ORGANIC-MATTER COMPOSITION; METHYL MERCURY; METHYLMERCURY PRODUCTION; ATMOSPHERIC DEPOSITION; REDUCING BACTERIA; SURFACE SEDIMENTS; PORE-WATER; ACCUMULATION; MINNESOTA; SOILS;

D O I：

10.1016/j.scitotenv.2009.12.037

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Total mercury (THg), methyl mercury (MeHg), total organic carbon (TOC), sediment bulk density (SBD), redox potential (Eh) and percent fines measurements were made on sediment cores collected along transects from littoral to profundal depths in Harp, Dickie, and Blue Chalk lake located on the Canadian Shield near Dorset, Ontario, Canada to determine whether empirical relationships exist among these sediment properties. MeHg was positively correlated with THg in all sediments with a MeHg:THg ratio (0.004 +/- 0.004) comparable to other uncontaminated profundal lakes. MeHg. MeHg:THg and TOC decreased with sediment depth within the core for all lakes, whereas THg only showed a decrease in Harp Lake. MeHg:THg ratio in surficial sediments was positively correlated with Eh and negatively correlated with TOC [MeHg:THg = -0.009*TOC (%) + 0.001*Eh (mV) - 1.902, p = 0.026]: whereas THg was positively correlated with TOC [log THg (ppb) = 0.026*TOC (%) + 1.400, p<0.0001]. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.

引用

页码：2087 / 2095

页数：9

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