Effect of Selenium on Mercury Methylation in Anaerobic Lake Sediments

Jin, L.-J.; Guo, Pei; Xu, Xiaohang

doi:10.1007/s001289900581

Cited by 20 publications

(12 citation statements)

References 10 publications

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“…The arthropod samples were digested by the same method and analyzed by a Terkram-2600 with a detection limit of 5 9 10 -6 ng/g. Methylmercury was extracted from the arthropods following the procedure described in Liu et al (2003) and Jin et al (1997). A portion of the arthropod samples (1.00-2.00 g) was placed into 100 mL acid-washed beakers followed by addition of 50 mL of 2 M HCl and 1 mL of 1% CuSO 4 solution.…”

Section: Methodsmentioning

confidence: 99%

Bioaccumulation of Total and Methyl Mercury by Arthropods

Dan

Wang

Zhang

et al. 2008

Bull Environ Contam Toxicol

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Three arthropods, Locusta migratoria manilensis, Acrida chinensis, and Paraten-odera sinensis were selected to study the bioaccumulation of total and methyl mercury. Concentrations of total mercury in the tissues of Locusta migratoria manilensis and Acrida chinensis were 0.013-0.154 and 0.009-0.138 mg/kg, respectively, while those of methylmercury were 0.001-0.012 and 0.001-0.006 mg/kg, respectively. Concentrations of total mercury in Locusta migratoria manilensis and Acrida chinensis, which are the primary consumers, are lower than those in their food, while mercury is accumulated more by the secondary consumer, Paraten-odera sinensis. For total mercury, the concentrations in Locusta migratoria manilensis are inversely proportional to body length and those in Acrida chinensis increase first and then decrease with increased body length. For methyl mercury, concentration is proportional to body length for both of these arthropods. Total mercury concentrations vary in different parts of the arthropod body, and increase in the order of: abdomen > thorax > head.

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Section: Methodsmentioning

confidence: 99%

Bioaccumulation of Total and Methyl Mercury by Arthropods

Dan

Wang

Zhang

et al. 2008

Bull Environ Contam Toxicol

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“…Senior et al (23,41) reported that little or no detectable Hg was leached by TCLP or SGLP from fly ash samples resulting from powdered activated carbon (PAC) injection demonstrations at four coal-fired power plants. As shown in Table 1, baseline fly ash, fly ash + sorbent, and COHPAC samples all gave similar leaching results, illustrating very low concentrations.…”

Section: Leachingmentioning

confidence: 99%

“…The role of Se in reducing bioaccumulation of Hg in fish has been reported (22)(23)(24), and inverse relationships between fish tissue Hg and the abundance of Se present in the ecosystem have been noted (25,26). Selenium supplementation of lake waters in Sweden resulted in a 75%-85% reduction in Hg levels of fish over a 3-year period (27), and loss of Se can have the opposite effect.…”

Section: Environmental Hgmentioning

confidence: 99%

Mercury and Air Toxic Element Impacts of Coal Combustion By-Product Disposal and Utilizaton

Hassett¹,

Heebink²,

Pflughoeft-Hassett³

et al. 2007

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conducted a multiyear study to evaluate the impact of mercury and other air toxic elements (ATEs) on the management of coal combustion by-products (CCBs). The ATEs evaluated in this project were arsenic, cadmium, chromium, lead, nickel, and selenium. The study included laboratory tasks to develop measurement techniques for mercury and ATE releases, sample characterization, and release experiments. A field task was also performed to measure mercury releases at a field site.Samples of fly ash and flue gas desulfurization (FGD) materials were collected preferentially from full-scale coal-fired power plants operating both without and with mercury control technologies in place. In some cases, samples from pilot-and bench-scale emission control tests were included in the laboratory studies. Several sets of "paired" baseline and test fly ash and FGD materials collected during full-scale mercury emission control tests were also included in laboratory evaluations. Samples from mercury emission control tests all contained activated carbon (AC) and some also incorporated a sorbent-enhancing agent (EA).Laboratory release experiments focused on measuring releases of mercury under conditions designed to simulate CCB exposure to water, ambient-temperature air, elevated temperatures, and microbes in both wet and dry conditions. Results of laboratory evaluations indicated that:• Mercury and sometimes selenium are collected with AC used for mercury emission control and, therefore, present at higher concentrations than samples collected without mercury emission controls present.• Mercury is stable on CCBs collected from systems both without and with mercury emission controls present under most conditions tested, with the exception of vaporphase releases of mercury exposed to elevated temperatures.• The presence of carbon either from added AC or from unburned coal can result in mercury being sorbed onto the CCB when exposed to ambient-temperature air.The environmental performance of the mercury captured on AC used as a sorbent for mercury emission control technologies indicated that current CCB management options will continue to be sufficiently protective of the environment, with the potential exception of exposure to elevated temperatures. The environmental performance of the other ATEs investigated indicated that current management options will be appropriate to the CCBs produced using AC in mercury emission controls. MERCURY AND AIR TOXIC ELEMENT IMPACTS OF COAL COMBUSTION BY-PRODUCT DISPOSAL AND UTILIZATION EXECUTIVE SUMMARYThe University of North Dakota Energy & Environmental Research Center (EERC) conducted a laboratory and field investigation designed to evaluate the impact of mercury and other air toxic elements (ATEs) on the management of coal combustion by-products (CCBs). Key objectives were:• To determine the release potential of mercury and other selected ATEs from CCBs under specific environmental conditions.• To increase the database of information on mercury and other ATE releases for CCBs.• To develop comparat...

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“…However, concentrations of mercury in sediment, fish, invertebrates [6,32], and bird eggs (Table 3) from the Colorado River delta did not exceed 1.0 μg/g wet weight. Studies have shown that the toxicity of mercury can be alleviated with selenium in different matrices, such as aerobic and anaerobic sediments [33], and in fish [34]. In sediments, small amounts of selenium (Na 2 SeO 3 ) can reduce the methylation rate of mercury, gradually detoxifying an ecosystem [33].…”

Section: Resultsmentioning

confidence: 99%

Concentration of contaminants in breeding bird eggs from the Colorado River Delta, Mexico

Garcı́a-Hernández

Sapozhnikova

Schlenk

et al. 2006

Environmental Toxicology and Chemistry

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Organic contaminants (organochlorine [OC], organophosphorus [OP] pesticides and polychlorinated biphenyls [PCBs]), and metals (As, Cd, Hg, Pb, and Se) are a concern to avian health in the Colorado River delta, Mexico. We determined concentrations of contaminants in eggs of three breeding species of birds from the delta (mourning doves [Zenaida macroura], burrowing owls [Athene cunicularia], and marsh wrens [Cistothorus palustris]). We collected 27 eggs of mourning doves, eight eggs of burrowing owls, and 18 eggs of marsh wrens for analyses. Polychlorinated biphenyls, OC, and OP pesticides were analyzed by gas chromatography equipped with an electron capture detector, and metals were analyzed by inductively coupled plasma mass spectrometry. The non-ortho PCB congeners (PCB 77 and 126) were found in mourning dove and burrowing owl eggs at concentrations in which hatchability can be affected. Mean selenium concentration found in marsh wren eggs (5.6 microg/g dry wt) exceeded the level of concern. Arsenic and Cd were found at higher than normal concentrations, Hg concentrations did not exceed the level of concern in any of the species, and Pb concentrations were higher in eggs of species subject to hunting. With the exception of lead, marsh wren eggs contained the highest metal concentrations.

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Effect of Selenium on Mercury Methylation in Anaerobic Lake Sediments

Cited by 20 publications

References 10 publications

Bioaccumulation of Total and Methyl Mercury by Arthropods

Bioaccumulation of Total and Methyl Mercury by Arthropods

Mercury and Air Toxic Element Impacts of Coal Combustion By-Product Disposal and Utilizaton

Concentration of contaminants in breeding bird eggs from the Colorado River Delta, Mexico

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