In situ measurement of trace metals in estuarine waters of Patos Lagoon using diffusive gradients in thin films (DGT)

Wallner-Kersanach, Mônica; Andrade, Caroline Pinto de; Zhang, Hao; Milani, Márcio Raimundo; Niencheski, Luís Felipe Hax

doi:10.1590/s0103-50532009000200019

Cited by 19 publications

(8 citation statements)

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“…These observations suggest that DGT measurements of Al and Cu in coastal waters using ODL include some labile organic species that are excluded or significantly retarded when using RDL. While Cu is well known to bind to organic matter in coastal waters48,61 , these observations may provide new insights into speciation of Al in coastal waters, especially as determined by DGT. The greater complexity of results for Al with the various binding and diffusive layers suggests that species in addition to (or perhaps even instead of) organic complexes may be contributing to some measurements, such as colloids35 .…”

mentioning

confidence: 98%

In situ evaluation of DGT techniques for measurement of trace metals in estuarine waters: a comparison of four binding layers with open and restricted diffusive layers

Shiva

Bennett

Welsh

et al. 2016

Environ. Sci.: Processes Impacts

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Four different DGT binding layers were used to make selective measurements of trace metals in coastal waters within The Broadwater (Gold Coast, Queensland). Chelex and PAMPAA (polyacrylamide-polyacrylic acid) binding layers were used to measure cations (Cd, Co, Cu, Mn, Ni, Pb, Zn), and Metsorb was used to measure anions (Al, As, Mo, Sb, V, W). A mixed binding layer (MBL) containing both Chelex and Metsorb was used to measure each of the trace metals and determine diffusive boundary layer (DBL) thicknesses. DGT measurements that were not corrected for the DBL thickness (0.049-0.087) were underestimated by 70% on average. Good agreement was observed between DGT-MBL and DGT-Chelex for measurement of Cd, Co, Cu, Ni, Pb and Zn, and between DGT-MBL and DGT-Metsorb for As, Sb and V. DGT-MBL measured significantly higher concentrations for Mn (compared with DGT-Chelex) and Al (compared with DGT-Metsorb). DGT-Chelex measured only 6-8% of Al species measured by either DGT-MBL or DGT-Metsorb. DGT-PAMPAA measurements of Cu, Pb and Al were lower than those of either DGT-MBL or DGT-Chelex varying from 74-81% for Cu to 54-70% for Pb and 51-55% for anionic Al(OH)4(-), suggesting that this binding layer may make more selective measurements. All measured trace metal concentrations were well below ANZECC water quality guidelines, except for Cu which was 2 to 10 times higher than trigger values. Each of the DGT techniques was deployed using both open and restricted diffusive layers (ODL and RDL). Most trace metal measurements were not significantly different with ODL and RDL for all binding layers. However, concentrations of Cu (CRDL/CODL = 0.68-0.75) and Al (CRDL/CODL = 0.73-0.79) were significantly different with DGT-MBL, DGT-Chelex and DGT-Metsorb.

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mentioning

confidence: 98%

In situ evaluation of DGT techniques for measurement of trace metals in estuarine waters: a comparison of four binding layers with open and restricted diffusive layers

Shiva

Bennett

Welsh

et al. 2016

Environ. Sci.: Processes Impacts

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“…It has still been used in the water to check the evolution of labile concentrations of some metals in the areas around the city. Taking into account the elements under analysis (Cd, Co, Cu, Mn, Ni, Pb and Zn), Cd, Cu and Pb showed higher bioavailability in the water of two locations in the marinas north of the city, when compared with the less urbanized site, the Marinheiros Island (Wallner-Kersanach et al, 2009). Due to the gradual release of trace metals from antifouling paints in vessels, marinas and ports were investi-gated in 2006 regarding the concentration of labile Cu, which is found in high concentrations in these paints.…”

Section: Speciation Of Trace Metals In Watermentioning

confidence: 99%

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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“…Pode-se destacar, a avaliação geoquímica de metais em amostras de sedimentos superficiais do estuário da Lagoa dos Patos (NIENCHESKI et al, 1994;MIRLEAN et al, 2001;MIRLEAN et al, 2003;NIENCHESKI et al, 2004;SANTOS et al, 2004a;CALDAS et al, 2013;COSTA et al, 2017), da Lagoa Mirim (SANTOS et al, 2003;SANTOS et al, 2004b), do Saco do Laranjal (BETEMPS et al, 2012) e do Canal São Gonçalo (SANCHES FILHO et al, 2017). Além disso, encontra-se estudos da determinação da concentração de metais em amostras de água da Lagoa Mangueira (SANTOS et al, 2018a), Lagoa Mirim (FRIEDRICH et al, 2006, e Lagoa dos Patos (WALLNER-KERSANACH et al, 2009;BARBOSA et al, 2012;MILANI et al, 2012;NIENCHESKI et al, 2015;COSTA et al, 2013;WINDOM et al, 2003;COSTA et al, 2013;WINDOM et al, 1999) bem como, a investigação da bioacumulação de metais em amostras de espécies de peixes do Canal São Gonçalo (LEMUS et al, 2000) e da Lagoa dos Patos (SANCHES FILHO et al, 2013;KÜTTER et al, 2009). Relatos de determinação da concentração de metais pesados em uma espécie de camarão (Farfantepenaeus paulensis) pescado na Lagoa dos Patos (PINTO et al, 2013) e do efeito de hidrocarbonetos transportados pelo escoamento urbano em análise de sedimento do Canal São Gonçalo (SANCHES FILHO et al, 2017b) são encontrados na literatura.…”

Section: Introductionunclassified

Avaliação da contaminação ambiental por metais pesados, através da análise de peixes coletados da Lagoa Mangueira – RS

Pereira

Santos

Filho

2019

RICA

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A presença de metais pesados no ambiente aquático pode ser originada de forma natural, por intemperismo das rochas ou por ações antropogênicas, com lançamento de resíduos e esgoto sem tratamento. O objetivo do presente estudo foi determinar a concentração dos metais Cr, Cu, Ni, Pb e Zn em amostras de peixes, como o jundiá (Rhamdia quelen), traíra (Hoplias malabaricus), voga (Cyphocharax voga) e joaninha (Crenicichla punctata) coletados da Lagoa Mangueira – RS. Analisou-se os tecidos dos músculos, brânquias e vísceras dos peixes. Dois métodos de digestão foram avaliados na decomposição do músculo do jundiá (Rhamdia quelen) e o método escolhido digeriu as amostras de tecido dos peixes em solução de HNO3/H2O2 2:1 (v/v), sob ultrassom à 70ºC por 10 min. Em paralelo, foi analisado o material certificado DORM-3 para avaliar a exatidão do método empregado na digestão das amostras. A ordem de distribuição dos metais pesados nos tecidos dos músculos, brânquias e vísceras das espécies analisadas foi Zn > Cu > Cr > Pb, sendo o Cr e Pb quantificados somente nas partes investigadas da traíra (Hoplias malabaricus) e o Ni não foi detectado em nenhuma espécie. Através do cálculo do fator de bioacumulação (FBA) avaliou-se o nível de metais no sedimento que pode se tornar biodisponível para os peixes. Os analitos foram quantificados utilizando a espectrometria de absorção atômica com chama (F AAS).

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In situ measurement of trace metals in estuarine waters of Patos Lagoon using diffusive gradients in thin films (DGT)

Cited by 19 publications

References 19 publications

In situ evaluation of DGT techniques for measurement of trace metals in estuarine waters: a comparison of four binding layers with open and restricted diffusive layers

In situ evaluation of DGT techniques for measurement of trace metals in estuarine waters: a comparison of four binding layers with open and restricted diffusive layers

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

Avaliação da contaminação ambiental por metais pesados, através da análise de peixes coletados da Lagoa Mangueira – RS

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