Mercury removal, methylmercury formation, and sulfate-reducing bacteria profiles in wetland mesocosms

King, James J.; Harmon, S. Michele; Fu, Theresa T; Gladden, J.B.

doi:10.1016/s0045-6535(01)00135-7

Cited by 115 publications

(64 citation statements)

References 29 publications

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“…The average mercury removal efficiency was 63.7 %. This efficiency is comparable or even higher than reported by King et al 22 and Kröpfelová et al 23 who observed the decrease in mercury concentration using a wetland treatment system by approximately 50 %. On the other hand, Nelson et al 25 observed the mercury removal efficiency in excess of 80 % for their treatment wetland.…”

Section: Mercury Determination In Treated Watersupporting

confidence: 82%

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Removal of Mercury from Wastewater Using a Constructed Wetland

Šíma¹,

Krejsa²,

Svoboda³

2015

Croat. Chem. Acta

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Abstract. Removal of mercury from municipal wastewater using a constructed wetland was studied. Wastewater, wetland plant, and sediment samples were analyzed using an advanced mercury analyzer AMA-254. Average concentrations of total mercury in inflow and outflow water were 0.157 and 0.057 µg L −1 , respectively. Significant fraction of mercury (38.2 %) was removed from wastewater during pretreatment. Mercury concentrations in vegetation (Phragmites australis) varied in the range of 0.0099−0.0105 and 0.0079−0.0086 mg kg −1 for the above and belowground biomass, respectively. Total mercury concentrations in the constructed wetland sediments were 0.151 and 0.103 mg kg −1 at distances 1 and 10 m from the inflow zone. Mercury can be precipitated and deposited at the initial part of the wetland bed and thus removed from wastewater. The formation of volatile mercury species is another mechanism of its removal. On the other hand, assimilation of Hg in wetland plants does apparently not contribute to mercury removal from wastewater.

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Section: Mercury Determination In Treated Watersupporting

confidence: 82%

“…Mercury removal in a wetland treatment system was studied by King et al 22 They observed the average total mercury concentration decrease of 50 % in a wetland planted with Scirpus californicus. Kröpfelová et al 23 studied removal of trace elements in three horizontal sub-surface flow constructed wetlands in the Czech Republic.…”

Section: Introductionmentioning

confidence: 99%

Removal of Mercury from Wastewater Using a Constructed Wetland

Šíma¹,

Krejsa²,

Svoboda³

2015

Croat. Chem. Acta

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“…In addition, for Hg concentrations lower than 5 mg L − 1 and salinities of 20 and 35 g L − 1 , no adsorption of metal was observed. According to Frenet-Robin and Ottmann [9], mercury does not fix much on clay minerals when the sodium chloride concentration is higher than 5.6 g L − 1 , because of the formation of the very resistant complex, HgCl 4 -. Conversely, Celis et al .…”

Section: Effect Of Salinity On Hg(ii) Adsorptionmentioning

confidence: 99%

“…Mechanical, chemical and biological methods have been developed for water purification and recovery of mercury from wastewater [3,4,5]. Because of the physical and chemical characteristics of clay minerals, such as large surface area, moderate to high cation exchange capacity and high negative surface charge, these materials can act as concentrators of trace elements in aquatic ecosystems [6], and can play an important role in controlling the background levels of such trace elements in sediments [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of salinity and temperature on the adsorption of Hg(II) from aqueous solutions by a Ca‐montmorillonite

Green-Ruíz

2009

Environmental Technology

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To cite this article: C. Green-Ruiz (2009) Use of clay minerals for removing mercury is an effective technology for the treatment of industrial wastewaters and can become an effective tool for the remediation of coastal ecosystems polluted with this metal. Calcic montmorillonite was employed for adsorbing Hg(II) ions from aqueous solutions at different conditions of salinity (0, 20 and 35 g NaCl L − 1 ), temperature (15, 25 and 35 ° C), and initial concentrations (0.25, 0.50, 1.00, 2.50, 5.00 and 10.00 mg Hg L − 1 ). It was observed that 0.4 g dry weight of montmorillonite removed from 0.02 mg g − 1 (at 0.25 mg L − 1 of Hg(II)) to 0.68 mg g − 1 (at 10.0 mg L − 1 of Hg(II)) at 25 ° C, salinity of 0 g NaCl L − 1 and pH of 6. The initial concentration of Hg(II) and salinity had an effect on the behaviour of the adsorption process, which was temperature independent. The data fit well the Freundlich adsorption isotherm, indicating that heterogeneous conditions prevail in this process.

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“…According to the recent report by UNEP (2013), re-emitted Hg from soil and vegetation accounts for about 19-51% of the total Hg currently being emitted and re-emitted to the atmosphere from all sources. When Hg is deposited on soil surface through wet and dry depositions it remains in the soil as inorganic Hg(II) compounds (Schuester, 1991), evades to lakes or oceans through runoff (Ahn et al, 2010), volatilizes to atmosphere (Barkay et al, 2003;Schlüter, 2000;Poissant and Casimir, 1998), or undergoes transformation to methylated Hg, the most toxic form (King et al, 2002). Hence, Hg exchange between atmosphere and soil is a critical step to track the fate of Hg in biogeochemical cycle.…”

Section: Introductionmentioning

confidence: 99%

Mercury Exchange Flux from Two Different Soil Types and Affecting Parameters

Park¹,

Kim²,

Han³

2013

Asian J. Atmos. Environ

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Mercury exchange fluxes between atmosphere and soil surface were measured in two different types of soils; lawn soil (LS) and forest soil (FS). Average Hg emission from LS was higher than from FS although the soil Hg content was more than 2 times higher in forest soil. In LS, Hg emissions were much greater in warm season than in cold season; however, deposition was dominant in FS during warm season because of leafy trees blocking the solar radiation reaching on the soil surface. In both LS and FS, Hg fluxes showed significantly positive correlations with UV radiation and soil surface temperature during cold season. In addition, it was observed that emission showed positive correlation with UV radiation and soil temperature while there was negative relationship between deposition and UV radiation.

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Mercury removal, methylmercury formation, and sulfate-reducing bacteria profiles in wetland mesocosms

Cited by 115 publications

References 29 publications

Removal of Mercury from Wastewater Using a Constructed Wetland

Removal of Mercury from Wastewater Using a Constructed Wetland

Effect of salinity and temperature on the adsorption of Hg(II) from aqueous solutions by a Ca‐montmorillonite

Mercury Exchange Flux from Two Different Soil Types and Affecting Parameters

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