Urban activity and mercury contamination in estuarine and marine sediments (Southern Brazil)

Mirlean, Nicolai; Calliari, Lauro Júlio; Baisch, Paulo Roberto Martins; Loitzenbauer, Ester; Shumilin, Evgueni

doi:10.1007/s10661-008-0558-1

Cited by 18 publications

(7 citation statements)

References 15 publications

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“…In fact, the different metals were associated with specific sources such as agricultural (Cu), industrial (Cr), and urban (Al, Cu) sources (Klumpp et al 2002). High urbanization has also been related to pollution by Hg in coastal environments (Ferraro et al 2006(Ferraro et al , 2009Mirlean et al 2009) and could be related to high values around the CRE as well. Therefore, there is a combination of several different pollution sources in the hydrographic basin of the Cachoeira River: an industrial hub including paint and dye factories, many agricultural fields with extensive use of pesticides and fertilizers, and untreated and diffuse discharge of urban sewage (Manzini et al 2010).…”

Section: Trace Elements In the Sedimentmentioning

confidence: 99%

Benthic Foraminiferal Response to Trace Elements in a Tropical Mesotidal Brazilian Estuary

Raposo

Frontalini

Clemente

et al. 2022

Estuaries and Coasts

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Living benthic foraminifera have been widely used as ecological indicators in coastal ecosystems. There is, however, a lack of studies on their response to trace element pollution in tropical estuarine systems. Here we analyze the living assemblages of benthic foraminifera, collected in 2016, in the Cachoeira River Estuary (CRE) in northeastern Brazil, to understand their response to natural and anthropogenic stressors, including trace element pollution. Some species were good bioindicators of specific environmental conditions, such as the agglutinant Paratrochammina clossi which preferred mangrove areas and anoxic conditions. In addition, the calcareous Ammonia tepida and Cribroelphidium excavatum, dominant within the whole system disregarding organic or trace element pollution, seem to resist even in the areas most polluted by trace elements. Interestingly, C. excavatum showed a particular positive relationship with trace element pollution (specifically by Cu and Pb), outnumbering the opportunistic A. tepida in the areas with higher pollution of these metals. However, for other species, it is still difficult to constrain to which parameters they respond (i.e., Haynesina germanica and Elphidium gunteri, which in the present study seem to respond to natural conditions, whereas in the literature they are regarded as indicators of trace element and organic pollution, respectively). Therefore, our findings shed light on the response of benthic foraminiferal species in a highly polluted and highly mixed tropical estuarine system and highlight the need to understand the complexity of these environments when applying foraminiferal biological indexes to avoid imprecise conclusions.

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Section: Trace Elements In the Sedimentmentioning

confidence: 99%

Benthic Foraminiferal Response to Trace Elements in a Tropical Mesotidal Brazilian Estuary

Raposo

Frontalini

Clemente

et al. 2022

Estuaries and Coasts

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“…Oxy-hydroxides and, secondarily, sulphides and organic matter are the most important metal carriers in sediments of the Patos Lagoon estuary. On the other hand, Mirlean et al (2003bMirlean et al ( , 2009 applied partial extractions for sediment samples and showed that As usually takes its labile form, while Hg does not. Metal speciation and bioavailability of particulate sediment matter were assessed in urban and industrial effluents from the Patos Lagoon estuary.…”

Section: Speciation Of Trace Metals In the Sedimentmentioning

confidence: 99%

“…Polluted urban soils and coastal reclamation fills were confirmed as the main sources of high mercury concentrations in shallow estuarine sediments which enter the navigation channel close to the urban area and are transported into the ocean. Hg concentration in sediments in the navigation channel has considerably increased since 2004 due to the intense reconstruction activity in the urban area (Mirlean et al, 2009). Periodic dredging of the channel strengthens the preconditions for coastal marine sediment contamination by mercury.…”

Section: N P R E S Smentioning

confidence: 99%

“…Baumgartem et al, 1995;Mirlean et al, 2000Mirlean et al, , 2005bMirlean et al, . 2008Mirlean et al, , 2009Costa & Wallner-Kersanach, 2013;Guttierrez, 2013). This estuary has been receiving higher amounts of nutrients and trace metals of anthropogenic origin in the last 15 years due to the increase in port, naval and industrial activities in the region.…”

Section: Introductionmentioning

confidence: 99%

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Temporal evolution of the contamination in the southern area of the Patos Lagoon estuary, RS, Brazil

Wallner-Kersanach¹,

Mirlean²,

Baumgarten³

et al. 2016

RGCI

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The southern area of the Patos Lagoon estuary has been subjected to intense industrial and port-related activities which have not only caused meaningful changes in the landscape but also degraded aquatic resources by contaminating them with dissolved nutrients and trace metals in the last decades. This study aims at compiling data on the development that has happened in the urban and industrial occupation in Rio Grande, a city located in the south of Rio Grande do Sul, RS, Brazil, by relating it to the main results of contamination indicators in the estuarine environment regarding water, sediment, soil and atmosphere. Bibliographic data have shown an increase in domestic effluents around the city in the 1980's, mainly in more sheltered areas, such as the Saco da Mangueira, where cyanobacteria eutrophication has often occurred because of the high concentration of nutrients. The content of trace metals in the water of channel areas of the estuary was always lower than the maximum limit established by Brazilian quality criteria. However, the sediment showed higher concentrations of some trace metals (e.g. copper, lead, nickel, vanadium and zinc), the metalloid As and Hg than the maximum concentrations established by the legislation, mainly in several places around urban, industrial and port areas. The labile fraction (or potentially bioavailable) in the water and in the sediment showed that trace metals have provided significant contributions to sheltered areas, such as marinas, but have exceeded in shipyards. Trace metals in the urban soil and man-made ground of the city indicated that there were anthropogenic contributions, mainly by mercury. Anomalies in the content of lead found in the atmospheric particulate matter and acid rain were also reported. Therefore, more severe environmental policies, effective control, industrial wastewater treatment and control of atmospheric emissions must be carried out in order to maintain environmental quality and public health. The city authorities in Rio Grande need to implement the existing integrated estuary management program in a proper and practical way, involving stakeholders and local governments.

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“…Pacyna and Pacyna [5] provide estimates of global total anthropogenic mercury emissions over the period 990 to 2000 by United State. Mercury contamination has been found in marine sediments of Southern Brazil for the periods of 1998 to 2008 [6]. Some fishes collected from the same areas also contaminated with mercury ranging from 12.4 ng/g to 216 ng/g [7].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Mercury Detoxification Potentiality of Isolated Streptococcus sp. MTCC 9724 under Different Environmental Conditions

Bhattacharyya¹,

Basu²,

Chaudhuri³

et al. 2013

eer

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The objectives of the present study were to isolate and identify a suitable mercury resistance bacterial strain and to explore their detoxification potentiality of mercury in different environmental conditions. A strain of Streptococcus sp. MTCC 9724 was isolated from the soil of waste dumping site adjacent to East Calcutta wetlands, West Bengal, India. Minimum inhibitory concentration of mercury was estimated. The bacteria were resistant to lead, arsenic, chromium and copper and antibiotics like Tetracycline, Ofloxacin, Amoxicillin, Ampicillin, Chloramphenicol and Cefadroxil. The bacteria were exposed containing 2, 5 and 10 mg/l of mercury containing media with variable pH, phenol and chloride ions as co-pollutants. It was observed that acidic pH was not suitable for bacterial growth and also for mercury detoxification. The presence of phenol in wastewater actually supported bacterial population growth and also mercury removal within 16 hours time periods, which indicated that utilization of phenol as a sole carbon source for bacterial metabolism, where as chloride ions up to 21 g/l did not inhibit the bacterial growth but significantly decreased the detoxification potentiality of Streptococcus sp. MTCC 9724.

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Urban activity and mercury contamination in estuarine and marine sediments (Southern Brazil)

Cited by 18 publications

References 15 publications

Benthic Foraminiferal Response to Trace Elements in a Tropical Mesotidal Brazilian Estuary

Benthic Foraminiferal Response to Trace Elements in a Tropical Mesotidal Brazilian Estuary

Temporal evolution of the contamination in the southern area of the Patos Lagoon estuary, RS, Brazil

Assessment of Mercury Detoxification Potentiality of Isolated Streptococcus sp. MTCC 9724 under Different Environmental Conditions

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