Total Mercury Distribution and Volatilization in Microcosms with and Without the Aquatic Macrophyte Eichhornia Crassipes

Correia, Raquel Rose Silva; Oliveira, Diana; Guimarães, Jean Rémy Davée

doi:10.1007/s10498-012-9164-5

Cited by 14 publications

(14 citation statements)

References 48 publications

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“…In the paper "Biogeochemical behavior of arsenic species at Paranaguá estuarine complex, southern Brazil," Dos Anjos et al (2012) showed that arsenic is present predominantly in the dissolved form and that organic species are abundant in eutrophic areas, especially in summer. The evaluation of how macrophytes influence the Hg cycle in water bodies is presented in "Total mercury distribution and volatilization in microcosms with and without the aquatic macrophyte Eichornia crassipes" by Correia et al (2012). Coprostanol and the ratio of some selected sterols were used as chemical markers of fecal contamination in the estuarine area of Cubatão by Campos et al (2012) in "Fecal sterols in estuarine sediments as markers of sewage contamination in the Cubatão area, São Paulo, Brazil."…”

mentioning

confidence: 99%

Introduction

Jardim

2012

Aquat Geochem

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confidence: 99%

Introduction

Jardim

2012

Aquat Geochem

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“…Previous research have shown the presence of SRB and Hg methylation in periphyton and rhizosphere of freshwater and estuarine aquatic macrophyte species such as Eichhornia crassipes, Elodea nutalli, Spartina alterniflora and S. maritima (Hines et al, 1999;Canário et al, 2007;Achá et al, 2011;Correia et al, 2012;Regier et al, 2012). However, no research was found on MMHg formation associated to roots of mangrove trees in the literature.…”

Section: Mangrove Transectmentioning

confidence: 99%

Mercury methylation in sediments of a Brazilian mangrove under different vegetation covers and salinities

et al. 2015

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The presence and formation of methylmercury (MMHg), a highly toxic form of Hg, in mangrove ecosystems is poorly studied. Therefore the aim of this study was to evaluate mercury methylation potentials in sediment, litter and root samples (Avicennia shaueriana and Spartina alterniflora) from different regions of a mangrove ecosystem, as well as the influence of salinity on methylation. Sediment was sampled under different depths and in mangrove regions with different plant covers and salinities. All samples were incubated with (203)Hg and MM(203)Hg was extracted and measured by liquid scintillation. MMHg was formed in all samples and sites tested including plant roots and litter. Higher Hg methylation was found in the superficial fraction of sediments (0.47-7.82%). Infralittoral sandy sediment had low MMHg formation (0.44-1.61%). Sediment under Rhizophora mangle had lower MMHg formation (0.018-2.23%) than under A. shaueriana (0.2-4.63%) and Laguncularia racemosa (0.08-7.82). MMHg formation in sediment tended to increase with salinity but the differences were not significant. Therefore, MMHg formation occurs in different sites of mangrove ecosystems and may be an important threat that requires further study.

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“…Furthermore, the excretion of metals by leaves is also greater for Spartina alterniflora than for Phragmites australis probably because of the presence of salt glands in the former species. 19 Correia et al 20 observed that Eichhornia Crassipes had mechanisms of Hg retention in roots. Their results suggested this macrophyte promoted changes in the Hg cycle since it attracted most Hg present in water and reduced Hg volatilization.…”

Section: Introductionmentioning

confidence: 99%

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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Total Mercury Distribution and Volatilization in Microcosms with and Without the Aquatic Macrophyte Eichhornia Crassipes

Cited by 14 publications

References 48 publications

Introduction

Introduction

Mercury methylation in sediments of a Brazilian mangrove under different vegetation covers and salinities

Removal of Mercury from Wastewater Using a Constructed Wetland

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