Toxicity assessment of arsenic and cobalt in the presence of aquatic humic substances of different molecular sizes

Watanabe, Cláudia Hitomi; Monteiro, Adnívia Santos Costa; Gontijo, Erik Sartori Jeunon; Lira, Vivian Silva; Bueno, Carolina; Kumar, Nirmal Tej; Fracácio, Renata; Rosa, André Henrique

doi:10.1016/j.ecoenv.2017.01.018

Cited by 28 publications

(8 citation statements)

References 30 publications

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“…The strong capability of HAs bind with PTEs may; on the other hand, decrease Co (Watanabe et al, 2017), Pb (An et al, 2015) and Cd phytoavailability (Farouk et al, 2011;Ondrasek et al, 2018;Ozfidan-Konakci et al, 2018). The molecular structure and functional groups of HAs might account for either PTEs mobilization or immobilization (Bai et al, 2020).…”

Section: Effect Of Has Applications On Plant Growth Parametersmentioning

confidence: 99%

Humic Acids Enhance Potentially Toxic Elements (PTEs) Phytoextraction from a Contaminated Soil by Basil Plants

et al. 2022

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Elevated levels of potentially toxic elements (PTEs) in soil possess a potential threat to human health. Probably, the use of hyper-accumulator plants can be an eco-friendly and cheap approach to attain more desirable levels of these contaminants in soil. The current study is a trial to increase the efficiency of basil (hyperaccumulator) plants to phytoextract some PTEs, namely Cd, Pb and Co froma clay soil artificially contaminated with these PTEsby the aid of elevated doses of humic acids (HAs 0-50mg kg -1 ) derived from a mature compost. A greenhouse experiment was conducted in 2021to attain this aim and lasted for 60 days, following a complete randomized design. During this investigation, soil moisture was kept gravimetrically ataround 70% of water holding capacityto avoid the leach out of soluble metal ions or organic complexes from the soil. By the end of this experiment, plants were harvested and the results indicated significant reductions in root and shoot dry weights and their lengths owing to the application of humic acids at a rate of 20mg kg -1 versus the control (0 mg HAs kg -1 ). Increasing the dose of HAs application (up to 50mg kg -1 ) led to concurrent significant increases in the abovementioned growth parameters; yet, their values were still below the control plants. Likewise, significant increases were noticeable for PTEs contents within roots and shoots of plants treated with 20mg HAs kg -1 while increasing the dose of HAs application resulted in significant reductions in their contents versus the lower application dose of HAs. Root-to-shoot translocation factor was >1 for each of Cd and Co, while the corresponding values for Pb were less than one. Unfortunately, all BAF values were below one and this result indicates that basil plants cannot be considered hyperaccumulators for Cd and Co but can be used for successful facilitated phytoextraction of these two contaminants from soil. In conclusion, humic acids although enhanced phytoextraction of the PTEs under study by basil plants,yet they cannot beconsidered the optimum chelating agent that could facilitate the phytoextraction of soil contaminants under conditions of the soil under study.

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Section: Effect Of Has Applications On Plant Growth Parametersmentioning

confidence: 99%

Humic Acids Enhance Potentially Toxic Elements (PTEs) Phytoextraction from a Contaminated Soil by Basil Plants

et al. 2022

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“…The Co content was variable among the sewage plants and showed no discernible trend. At high levels, Co is harmful to plants but is an essential element at trace levels in enzymatic biochemical reactions [42].…”

Section: Trace Metals In Sludge Of Selected Municipal Sewage Plants Imentioning

confidence: 99%

A Review: Assessment of Trace Metals in Municipal Sewage and Sludge: A Case Study of Limpopo Province, South Africa

Shamuyarira¹,

Gumbo²

2018

Sewage

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Trace metals including nanosilver in our aquatic environment are on the increase in part due to discharge from municipal sewage and indirectly from leaching from abandoned mine tailings and from sludge spread on farmland. The presence of the trace metals will likely impact negatively on the aquatic environment in excess of background levels. This review reports on the concentration of trace metals in municipal sewage in Limpopo province and the impact on fish and human health. Human health risks associated with the consumption of contaminated fish are discussed. The presence of silver is also highlighted and the remedial actions that are available in reducing the health risks including positive outcomes are discussed. The source of silver may be from the use of silver nanoproducts. There is a need for a paradigm shift of zero effluent discharge and start with harvesting of metals from the sewage effluent and sludge in order to protect the environment.

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“…Assim, valores altos dessa razão indicam um maior grau de humi cação das SHA, causado pela diminuição do conteúdo de carboidratos (Dos Santos et al, 2007). O valor da razão atômica C/O encontrado no presente trabalho, que foi de 0,05, está abaixo do valor encontrado por Watanabe et al (2017) para as SHA extraídas do Rio Sorocabinha/SP, no qual o valor encontrado foi de 1,17, indicando que apresentam um baixo grau de humi cação.…”

Section: Análise Elementar Das Substâncias Húmicas Aquáticas (Sha)unclassified

Extração E Caracterização De Substâncias Húmicas Aquáticas (Sha) Extraídas De Amostras Coletadas No Parque Nacional Serra De Itabaiana, Sergipe, Brasil

Costa

Santos

et al. 2018

R. Ci. Amb.

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Este trabalho descreve o estudo da capacidade de complexação (CC) das substâncias húmicas aquáticas (SHA) extraídas de amostras de água coletadas no Parque Nacional Serra de Itabaiana (Sergipe) pelos íons metálicos Mn, Ni, Zn, Cu e Pb, bem como a avaliação da concentração dos metais totais das amostras de água. Os parâmetros físicos e químicos das amostras de água foram determinados por pH, temperatura, condutividade elétrica e COD, assim como a determinação dos metais totais foram quantificados por ICP OES. As SHA foram extraídas com resina XAD 8, segundo o procedimento reconhecido pela International Humic Substances Society (IHSS), e foram caracterizadas por TGA, análise elementar e por FTIR. Posteriormente foi estudado a CC das SHA pelos íons metálicos Cu, Mn, Ni, Pb e Zn pelo método de ultrafiltração. O valor do pH da amostra estudada apresentou valor abaixo dos estabelecidos pela Resolução CONAMA N° 357. No entanto, o valor da condutividade elétrica está em conformidade com a Portaria N° 2914 do Ministério da Saúde. As concentrações dos metais totais estão em acordo com a Resolução CONAMA N° 357, exceto para o Pb. As SHA apresentaram três processos principais de perda de massa (de acordo com as curvas TGA/DTGA), e o espectro FTIR apresentou bandas características de SHA. A CC das SHA por íons metálicos estabeleceu a seguinte ordem decrescente: Mn(II) > Ni(II) > Zn(II) >> Cu(II) > Pb(II). Esses resultados reforçam que as SHA podem ser classificadas como agentes complexantes naturais que desempenham uma função importante no meio ambiente.

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Toxicity assessment of arsenic and cobalt in the presence of aquatic humic substances of different molecular sizes

Cited by 28 publications

References 30 publications

Humic Acids Enhance Potentially Toxic Elements (PTEs) Phytoextraction from a Contaminated Soil by Basil Plants

Humic Acids Enhance Potentially Toxic Elements (PTEs) Phytoextraction from a Contaminated Soil by Basil Plants

A Review: Assessment of Trace Metals in Municipal Sewage and Sludge: A Case Study of Limpopo Province, South Africa

Extração E Caracterização De Substâncias Húmicas Aquáticas (Sha) Extraídas De Amostras Coletadas No Parque Nacional Serra De Itabaiana, Sergipe, Brasil

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