Mercury contents in aquatic macrophytes from two reservoirs in the Paraíba do Sul: Guandú river system, SE Brazil

Molisani, Maurício Mussi; Rocha, Rafael Christian Chávez; Machado, Wilson; Barreto, Rafael Ferreira; Lacerda, Luiz Drude de

doi:10.1590/s1519-69842006000100013

Cited by 71 publications

(34 citation statements)

References 28 publications

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“…For Barros and Henares (2015), this is assertive for floating aquatic weeds, which absorb most of the nutrients through this compartment, with the area and the length of the root being factors which influence the absorption of metal ions. In studies with macrophytes coming from contaminated water systems, the floating species S. auriculata and E. crassipes were highlighted by the high levels of mercury (Hg) present in their biomass, mainly in the roots (Molisani et al, 2006). However, Salvinia has a significant uptake of water and nutrients through its leaves, since of course, it maintains its adaxial face in contact with the solution (Rodrigues et al, 2016), and being known to have presented modified leaves which are adapted to absorption (Sculthorpe, 1967).…”

Section: Discussionmentioning

confidence: 99%

Accumulation of copper by the aquatic macrophyte Salvinia biloba Raddi (Salviniaceae)

et al. 2017

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Aquatic macrophytes have properties and mechanisms which are useful for the removal of substances in solution, commonly used in phytoremediation processes in aquatic environments. This study evaluated the performance of copper (Cu) accumulation by Salvinia biloba Raddi (Salviniaceae) in different metal concentrations (1, 3 and 5 µg mL -1 ), as well as the control treatment, measured at intervals of 0, 7 and 14 days under laboratory conditions, with control as to pH and luminosity. After the experiment, the S. biloba biomass was washed, kiln dried, crushed and subjected to the process of digestion, and subsequently the accumulated copper content was determined by atomic absorption spectroscopy. The results showed that S. biloba is apt at accumulating copper, varying significantly between different treatments and days of exposure to the contaminant, as well as its interaction (treatment × days). The highest accumulation values were observed in treatment with 5 µg mL -1 , which at 14 days, with 11,861 µg g-1 of copper. We observed symptoms of toxicity and mortality in plants, probably indicating the effect of copper on the species when at high levels. Salvinia biloba is an efficient species in the removal of copper in solution, its recommendation as a remediating agent in aquatic ecosystems being possible.Keywords: aquatic ecosystems, phytoremediation, aquatic plants, bioaccumulation, water resources.Acumulação de cobre pela macrófita aquática Salvinia biloba Raddi (Salviniaceae) ResumoMacrófitas aquáticas apresentam propriedades e mecanismos úteis à remoção de substâncias presentes em solução, comumente, utilizadas em processos de fitorremediação de ambientes aquáticos. Este estudo avaliou o desempenho de acumulação de cobre (Cu) por Salvinia biloba Raddi (Salviniaceae) em diferentes concentrações do metal (1, 3 e 5 µg mL), além do tratamento controle, avaliados em intervalos de 0, 7 e 14 dias, sob condições laboratoriais, com controle de pH e luminosidade. Após o experimento a biomassa de S. biloba, foi lavada, seca em estufa, triturada e submetida ao processo de digestão, sendo, posteriormente, o teor de cobre acumulado determinado por espectroscopia de absorção atômica. Os resultados evidenciaram que S. biloba é hábil em acumular cobre em sua biomassa, variando significativamente entre os diferentes tratamentos e dias de exposição ao contaminante, bem como por sua interação (tratamentos × dias). Os maiores teores de acúmulo foram observados no tratamento com 5 µg mL -1 , que aos 14 dias apresentou até 11.861 µg g -1 de Cu. Observamos sintomas de toxicidade e mortalidade nas plantas, evidenciando, provavelmente, o efeito do cobre sobre a espécie quando em elevados níveis. Salvinia biloba é uma espécie eficiente na remoção do cobre em solução, sendo possível sua recomendação como agente de remediação em ecossistemas aquáticos.Palavras-chave: ecossistemas aquáticos, fitorremediação, plantas aquáticas, bioacumulação, recursos hídricos. Freitas, F. et al.

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Section: Discussionmentioning

confidence: 99%

Accumulation of copper by the aquatic macrophyte Salvinia biloba Raddi (Salviniaceae)

et al. 2017

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“…Molisani et al (2006) studied the concentration of Hg in aquatic macrophytes from two reservoirs in Paraíba do Sul -Rio Guandu (Sergipe) -Brazil. One of the plants, the S. montevidensis Bogin, presented 103 ± 4 ng g -1 in its leaves and 62 ± 35 ng g -1 in its roots.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Sagittaria montevidensis Cham. & Schltdl. as a bioindicator and phytoextractor of toxic metals

Ferrer¹,

Betemps²,

Rosa³

et al. 2017

Rev. ambiente água

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This study evaluated the bioindication and phytoremediation capacity of the aquatic macrophyte Sagittaria montevidensis by using it to assess the bioconcentration and translocation of heavy metals. A simple sampling was conducted at four sites in the region of Pelotas, southern Brazil, where plants, water and sediments were collected. The plants were subjected to nitric-perchloric acid digestion and the sediments underwent pseudo-total acid digestion. The determination of the elements Cr, Cu, Pb, Ni and Zn in the extracts was performed by flame atomic absorption spectrometry. Physicochemical tests were also carried out on water samples, including pH, electrical conductivity, chlorides, alkalinity, hardness and organic matter, and in sediment samples, moisture and organic matter content. The macrophyte study indicated a Bioconcentration Factor (BCF) and a Translocation Factor (TF), especially for Ni. The results showed that the aquatic macrophyte species S. montevidensis has a phytoextraction capacity, mainly for Ni, and potentially for bioindication of Cu, Ni and Zn.Keywords: aquatic macrophyte, heavy metals, phytoremediation. Avaliação da Sagittaria montevidensis Cham. & Schltdl. como bioindicador e fitoextrator de metais tóxicos RESUMOEste estudo teve como objetivo avaliar a capacidade de fitorremediação e bioindicação da macrófita aquática Sagittaria montevidensis, utilizando como parâmetros a bioconcentração e translocação de metais pesados. Foi realizada uma amostragem simples em quatro locais na região de Pelotas, sul do Brasil, na qual foram coletadas plantas, águas e sedimentos. As plantas foram submetidas a digestão ácida nítrico-perclórica e os sedimentos sofreram a extração pseudo-total de digestão ácida. A determinação dos elementos Cr, Cu, Pb, Ni e Zn nos extratos foi realizada por espectrometria de absorção atômica em chama. Também foram realizados ensaios físico-químicos em amostras de água, incluindo pH, condutividade elétrica, cloretos, alcalinidade, dureza e matéria orgânica e, em amostras de sedimentos, umidade e teor de matéria orgânica. A macrófita aquática estudada apresentou

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“…Aquatic macrophytes have been used for monitoring the contamination level by various pollutants in aquatic environments (Sawidis et al, 1995), including organic matter and nutrients such as P and N in wetland systems (Borges et al, 2008) and heavy metals, such as Zn (Wolff et al, 2009), Hg (Molisani et al, 2006) and others as these plants have the ability to accumulate metallic ions (Devi et al, 1996). The use of these plants as bioindicators of contamination by heavy metals has advantages: a) high tolerance to the pollutant, b) easy sampling, c) selective absorption ability, and d) individuals are relatively big and easy to handle in laboratories (Lewis, 1995;Zhou et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

The use of Salvinia auriculata as a bioindicator in aquatic ecosystems: biomass and structure dependent on the cadmium concentration

et al. 2012

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This study shows, in a multiple-level approach, the responses of Salvinia auriculata to Cd pollution in aquatic ecosystems. S. auriculata ramets were cultivated in nutrient solution and subjected to five treatments with Cd for ten days. At the end of the experiment, the number of new ramets and the dry biomass were determined. For ultrastructural observations, the leaves of S. auriculata were analyzed using a scanning electron microscope and transmission electron microscope. At the end of the experiment, the plants exposed to Cd showed damage in the leaves including necrosis and chlorosis, stomate deformations and damaged trichomes. We observed a decrease in the number of new ramets and dry biomass of S. auriculata following the increase in Cd concentration in the solution. At the ultrastructural level, leaves exposed to Cd presented chloroplast deformations and deterioration in the cell wall. All the symptoms of toxicity were directly proportionate to the concentration of Cd in the solution. The results suggests that S. auriculata shows good potential for use as a bioindicator and it can be used in the biomonitoring of aquatic ecosystems contaminated by Cd.Keywords: aquatic plant, heavy metal, ecological indicator, biomonitoring.O uso de Salvinia auriculata como bioindicador em ecossistemas aquáticos: biomassa e estrutura dependentes da concentração de cádmio ResumoEste estudo apresenta, em diferentes níveis de abordagem, a resposta de Salvinia auriculata à poluição de ecossistemas aquáticos por cádmio (Cd). Rametes de S. auriculata foram cultivados em solução nutritiva e expostos a cinco tratamentos com Cd durante dez dias. Ao final do experimento, o número de novos rametes e a biomassa seca foram determinados. Para observações ultraestruturais, as folhas de S. auriculata foram analisadas utilizando-se um microscópio eletrônico de varredura e a microscopia eletrônica de transmissão. Ao final do experimento, as plantas expostas ao Cd apresentaram danos nas folhas, como necrose e clorose, além de estômatos deformados e tricomas danificados. Foi observado um menor número de rametes e diminuição da biomassa seca de S. auriculata com o aumento da concentração de Cd na solução. Em nível ultraestrutural, as folhas expostas ao Cd apresentaram má formação dos cloroplastos e deterioração da parede celular. Todos os sintomas de toxidade foram diretamente proporcionais à concentração de Cd na solução. Os resultados sugerem que S. auriculata apresenta um bom potencial para uso como bioindicador e pode ser usada em programas de biomonitoramento de ecossistemas aquáticos contaminados por Cd.Palavras-chave: planta aquática, metal pesado, indicador ecológico, biomonitoramento.

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Mercury contents in aquatic macrophytes from two reservoirs in the Paraíba do Sul: Guandú river system, SE Brazil

Cited by 71 publications

References 28 publications

Accumulation of copper by the aquatic macrophyte Salvinia biloba Raddi (Salviniaceae)

Accumulation of copper by the aquatic macrophyte Salvinia biloba Raddi (Salviniaceae)

Evaluation of the Sagittaria montevidensis Cham. & Schltdl. as a bioindicator and phytoextractor of toxic metals

The use of Salvinia auriculata as a bioindicator in aquatic ecosystems: biomass and structure dependent on the cadmium concentration

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