The Role of the Humic Substances in the Fractioning of Heavy Metals in Rodrigo de Freitas Lagoon, Rio de Janeiro - Brazil

Fonseca, Estefan Monteiro da; Neto, José Antônio Baptista; McAlister, John; Smith, Bernard; Fernandez, Marcos Antônio; Balieiro, Fabiano de Carvalho

doi:10.1590/0001-3765201371011

Cited by 15 publications

(12 citation statements)

References 55 publications

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“…However, although humic substances have been investigated as a washing agent for soils contaminated by polyaromatic hydrocarbons and other organic pollutants (Borggaard et al, 2009;Soleimani et al, 2010) and testing on heavy metal polluted soils is limited, in recent years some studies have been performed (Fonseca et al, 2013;Tang et al, 2014;An et al, 2015;Hwang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances

Boechat

Pistóia

Lüdtke

et al. 2016

Rev. Bras. Ciênc. Solo

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Bioavailability of heavy metals at contaminated sites is largely controlled by the physicochemical properties of the environmental media such as dissolved organic matter, hydroxides and clay colloids, pH, soil cation exchange capacity and oxidation-reduction potential. The aim of this study was to investigate soil pH and heavy metal solubility effect by levels of humic and fulvic acids applied in soil samples with different levels of contamination by heavy metals. The soil samples used in this study were collected in a known metal-contaminated site. Humic acid (HA) and fulvic acid (FA) were purchased as a commercially available liquid material extracted from Leonardite. The experiment was carried out in a factorial scheme of 4 × (4 + 1), with four contaminated soil samples and four treatments, comprised of two levels of HA, two levels of FA and a control. The HA treatments increased the solubility of Cu, Zn, Ni, Cr, Cd, Pb, As and Ba from soils, while FA treatments decreased, thus raising or not their availability and mobility in soil. Humic acid concentration did not influence soil pH and FA decreased soil pH until 0.7 units. The initial heavy metal concentration in soil affects the magnitude of the processes involving humic substances. The lower releases of heavy metals by FA verified the importance of the complexation properties of organic compounds. These results appear to encourage the use of HA for increased plant-availability of heavy metals in remediation projects and the use of FA for decreased plant-availability of heavy metals at contaminated sites with a risk of introducing metals into the food chain.

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Section: Introductionmentioning

confidence: 99%

Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances

Boechat

Pistóia

Lüdtke

et al. 2016

Rev. Bras. Ciênc. Solo

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“…It is important to note that humic acids contained in peat soils may limit electron mobility or immobilise Cu in the soil profile (Fonseca et al 2013). It is assumed that the use of copper sulphate as a wood preservative has contaminated the soil with copper.…”

Section: Copper Content In the Tested Areasmentioning

confidence: 99%

Concentration of trace elements in forest soil affected by former timber depot

Warczyk

Wanic

Antonkiewicz

et al. 2020

Environ Monit Assess

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Certain parts of global forests show elevated concentrations of trace elements as a result of industry processes, places such as wood depots and plant protection products, which together degrade the forest environment. This paper examines a timber depot that used wood preservatives in World War II located in the Warcino Forest Inspectorate (Poland). It presents monitory findings on the degree to which the upper soil layer in the depot area has been contaminated by wood preservatives. Within two forest divisions, a network of soil extraction points was established, distinguished into three separate categories that demarcate the degrees of vegetation coverage and growth of the common pine. These were Area A (area with a pine stand that is several dozen years-old), Area B (areas with a pine stand that is approximately a dozen years-old) and Area C (areas without a pine stand). The Cu concentration in the surface categories was respectively 141.03/187.54/834.43 mg·kg−1. Above 600% in Cu concentration was noted in category C in comparison to category A. It was found that the content of most elements (B, Cd, Co, Cr, Fe, Mn, Mo, Ni, Pb, Zn) did not exceed the permissible values according to the Regulation of the Minister of the Environment on soil quality standards; however, in the case of Cu, the limit values established for forest and agricultural soils were exceeded, with the highest Cu contents found in the ‘C’ category. The results obtained confirm that the wood protection chemicals, such as copper sulphate, affected the long-term pollution of forest soils.

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“…Coastal lagoons are fragile marine environments and have suffered from urban expansion. High population densities in their environment expose them to eutrophication processes due to increases in nutrient concentrations in water and pollution (Marques-Junior et al, 2009;Van Weerelt et al, 2012;Fonseca et al, 2013). The eutrophication can be natural due to the excessive input of nutrients into the ecosystem, but anthropogenic activities can also accelerate it.…”

Section: __________________ Corresponding Editor: Sergio Contrerasmentioning

confidence: 99%

Greenhouse gas emission from a eutrophic coastal lagoon in Rio de Janeiro, Brazil

Fonseca-Viana

Santos²,

Bernardes³

et al. 2019

LAJAR

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Greenhouse gases increased in concentrations over pre-industrial values by 257% for methane and 145% for carbon dioxide in 2016. Such increased levels are the main climate change drivers and may affect aquatic systems that accumulate and carry carbon to the ocean and the atmosphere. Additionally, these systems are sensitive to environmental changes since their physical, chemical and biological properties respond rapidly to changes. Therefore, this study focus on the greenhouse gases dynamic over an urban eutrophic tropical lagoon. Samplings were performed in the Rodrigo de Freitas Lagoon by covering four periods in 2016 (April, June, October and December). Mean diffusive flux was -1,466.8 mg m -2 d -1 of carbon dioxide and 113.7 mg m -2 d -1 of methane. Regarding the bubbling, fluxes were 58.28 mg m -2 d -1 for methane and negligible for carbon dioxide (mean value of 5.01 mg m -2 d -1 ). Environmental parameters such as depth, water temperature and sediment particle size were strongly related to the fluxes. In conclusion, the region is a sink of carbon dioxide and a source of methane to the atmosphere. Additionally, the rivers discharge impacts the lagoon by generating a methane hotspot emission region.

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The Role of the Humic Substances in the Fractioning of Heavy Metals in Rodrigo de Freitas Lagoon, Rio de Janeiro - Brazil

Cited by 15 publications

References 55 publications

Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances

Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances

Concentration of trace elements in forest soil affected by former timber depot

Greenhouse gas emission from a eutrophic coastal lagoon in Rio de Janeiro, Brazil

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