Use of dredged sediments on agricultural soils from viewpoint of potentially toxic substances

Vácha, Radim; Čechmánková, Jarmila; Skála, Jan; Hofman, Jakub; Čermák, Pavel; Sáňka, Milan; Váchová, T.

doi:10.17221/105/2011-pse

Cited by 15 publications

(5 citation statements)

References 13 publications

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“…In our previous study, fine fractions of sediments were demonstrated to play a dominant role in the distribution of dioxins in Rybnik Reservoir (Baran et al 2019c ). Vácha et al ( 2011 ) and Lee et al ( 2006 ) also observed a poor relation between the concentration of organic pollutants and the content of TOC in the sediment. Moreover, Lee et al ( 2006 ) suggested that the concentration of dioxins in silt and clay particles was up to 16 times higher than in sand or coarse.…”

Section: Discussionmentioning

confidence: 94%

Concentration of dioxin and screening level ecotoxicity of pore water from bottom sediments in relation to organic carbon contents

et al. 2020

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The information about concentrations of dioxin in pore water, ecotoxicity and DOC and TOC content can be key factor for the prediction of the fate of dioxins in the aquatic environment as well as an ecological risk assessment. The aims of the study were to assess the concentration of PCDDs/PCDFs and ecotoxicity of pore water and to compare above results in relation to the dissolved organic carbon (DOC) and total organic carbon (TOC) content. The concentration of dioxins was assessed using an enzyme-linked immunoassay test, while the ecotoxicity of pore water was determined using a crustacean Daphnia magna and bacteria Aliivibrio fischeri. The studies were conducted on two different dammed reservoirs Rożnów (catchment basin of an agricultural character) and Rybnik (catchment basin of an industrial character) located in southern Poland. The concentration of dioxins in pore water was between 8.56 to 90.92 ng EQ/L, with a significantly higher concentration in the pore water from the Rożnów Reservoir than the Rybnik Reservoir. The DOC content in pore water was from 30.29 to 63.02 mg/L (Rożnów Reservoir) and from 35.46 to 60.53 mg/L (Rybnik Reservoir). Higher toxic responses were recorded for A. fischeri than for D. magna. Moreover a significantly higher toxicity for both tested organisms was indicated in pore water from the Rożnów Reservoir. Besides of TOC and DOC, the fine fractions of the sediments were particularly important in the concentration of dioxin in pore water. The other pore water parameters, such as pH and EC can influence the toxicity of water for organisms. The result indicate complex relationships between the PCDD/F, ecotoxicity and DOC, TOC concentration in pore water and confirms that these parameters are important in terms of water environmental contamination.

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Section: Discussionmentioning

confidence: 94%

Concentration of dioxin and screening level ecotoxicity of pore water from bottom sediments in relation to organic carbon contents

et al. 2020

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“…Além disso, simulações da disposição de sedimentos de dragagem em Latossolos e Chernossolos são frequentemente realizadas em Horizonte B, tendo em vista cenários hipotéticos de disposição visando à recuperação de áreas degradadas (Cesar et al, 2014). A escolha pelo Latossolo se deve ao fato de que esta é a classe de solo mais abundante no Brasil e amplamente utilizada na agricultura e ao uso potencial de sedimentos dragados como fertilizante nestes solos (Vacha et al, 2011). O Chernossolos, por outro lado, tem distribuição espacial mais restrita no Brasil, mas são comumente utilizados em agriculturas de lavouras intensivas, principalmente no sul no Brasil.…”

Section: Materials E Métodos 21 Amostrasunclassified

Influence of Salinity on the Toxicity of Dredged Sediments from Estuarine Rodrigo de Freitas Lagoon and Guanabara Bay (RJ): Toxic Effects On Earthworms

et al. 2019

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ResumoA influência da salinidade na ecotoxicidade de sedimentos dragados de sistemas estuarinos, em cenário de disposição terrestre, foi estudada utilizando Eisenia andrei como bioindicador. Foram coletadas amostras de Latossolo e de Chernossolo e salinizadas com água do mar para realização de bioensaios agudo e de fuga. Dados de salinidade e CL 50 de sedimento (Lagoa Rodrigo de Freitas e Baía de Guanabara) foram compiladas da literatura, oriundos de bioensaios agudo com E. andrei. Quando a concentração de sal na mistura solo: sedimento é próxima à CL 50 de sal obtida experimentalmente com água do mar, considerou-se que o sal tem papel preponderante na toxicidade. As concentrações de sal ≥ 3 g/kg são significativamente letais aos organismos em ambos os tipos de solo. Respostas significativas de fuga foram constatadas a partir da dosagem de 2 g/kg. Os resultados indicam que para os sedimentos da APA de Guapimirim (inverno), Lagoa Rodrigo de Freitas (em Chernossolo), Porto do Rio (inverno), Porto de Niterói (verão) e foz do Rio Meriti (inverno), o sal marinho tem papel de suma relevância na toxicidade para as minhocas. Para as demais áreas estudadas, outros fatores, como as propriedades do sedimento, metais pesados e substâncias orgânicas, parecem desempenhar papel mais importante na toxicidade. AbstractThe role of salinity levels in the toxicity of dredged sediments from estuarine systems, in scenario of land disposal, was investigated by using Eisenia andrei as bioindicator. Samples of ferralsol and chernosol were collected and salinized with seawater (2 and 12 g/kg of salt) and submitted to acute and avoidance bioassays with E. andrei. Data of salinity and sediment LC 50 were extracted from the literature. These data consists of results from acute bioassays with E. andrei applied to dredged sediments from Rodrigo de Freitas Lagoon and Guanabara Bay. The concentration of salt (g/kg) in soil:sediment mixture that corresponded to the LC 50 was estimated by determining salt contents in pure soils and sediments. When such concentration is close to the LC 50 obtained in laboratory using seawater, the influence of the salt in the toxicity was considered preponderant. The results revealed that concentrations of salt ≥ 3g/kg are significantly lethal to the organisms in both soil types, but toxicity levels are higher in ferralsol (LC 50 = 3,51 g/kg) than those observed in chernosol (LC 50 = 4,03 g/kg). Concentrations of salt ≥ 2g/kg were able to cause significant avoidance responses, but again the value of EC 50 in ferralsol (2,77 g/kg) were lower than that obtained in chernosol (2,99 g/kg). These observations are due to the abundance of expansive clay minerals in chernosol, with high cationic exchange capacity and that are able to reduce toxicity levels. The sediments whose salt concentrations in the sediment LC 50 (soil:sediment mixture) are close to the salt LC 50 values determined in laboratory are the APA of Guapimirim (winter), Porto of Rio (winter), Port of Niterói (summer), Rodrigo de Freitas Lagoon (in chernosol)...

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“…A dragagem desses sistemas aquáticos é frequentemente requerida com o objetivo de restaurar a navegabilidade de corpos hídricos assoreados, bem como de prevenir e/ou atenuar os impactos oriundos da eutrofização, da proliferação de patógenos e da contaminação por metais e compostos orgânicos (Ho et al 2002, Munns et al 2002, Machado et al 2011. Nesse contexto, a disposição sustentável dos sedimentos de dragagem (via de regra, na ordem de milhões de m 3 ) torna-se temática de extrema relevância e alguns autores descrevem o reaproveitamento desses materiais na construção civil, no engordamento de praias e como insumo na agricultura (Ho et al 2002, Munns et al 2002, Vacha et al 2011.…”

Section: Introductionunclassified

Disposição de sedimentos de dragagem em solos tropicais: avaliação da ecotoxicidade com base em bioensaios com alface e de bioacumulação de metais com oligoquetas edáficos

et al. 2014

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The results revealed higher levels of ecotoxicity for the ferralsol mixtures (EC50=3.58%) rather than chernosols treatments (EC50=4.19%). The abundance of expansive clay minerals and higher fertility levels in chernosols may have reduced the ecotoxicity of such treatments. The bioaccumulation assay with E. andrei revealed a positive balance of mercury in earthworm tissues, suggesting potential occurrences of damages on the health of those animals. The concentrations of lead, chromium and nickel were bellow the detection limits. The concentrations of zinc and copper were the highest ones among the studied metals, fact that may be associated with the essential role played by such metals in the earthworm metabolism.

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Use of dredged sediments on agricultural soils from viewpoint of potentially toxic substances

Cited by 15 publications

References 13 publications

Concentration of dioxin and screening level ecotoxicity of pore water from bottom sediments in relation to organic carbon contents

Concentration of dioxin and screening level ecotoxicity of pore water from bottom sediments in relation to organic carbon contents

Influence of Salinity on the Toxicity of Dredged Sediments from Estuarine Rodrigo de Freitas Lagoon and Guanabara Bay (RJ): Toxic Effects On Earthworms

Disposição de sedimentos de dragagem em solos tropicais: avaliação da ecotoxicidade com base em bioensaios com alface e de bioacumulação de metais com oligoquetas edáficos

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