Soluble and particulate metals in the Po River: Factors affecting concentrations and partitioning

Pettine, M.; Camusso, M.; Martinotti, W.; Marchetti, Rino; Passino, R.; Queirazza, G.

doi:10.1016/0048-9697(94)90118-x

Cited by 65 publications

(34 citation statements)

References 26 publications

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“…0,09-0,05 0,10-1,6 0,5-1,7,6 0,04-0,43 0,09-0,57 0,05-0,50 Pettine et al, 1994 Ig. A preferência dos metais pela fase dissolvida (Figura 11) pode estar associada às condições de oxi-redução dos ambientes, de pH e de teor de matéria orgânica em cada fração, as quais podem auxiliar a migração dos metais para uma ou outra forma, como foi observado por Bruno (2000).…”

Section: Localunclassified

Efeitos da ação antrópica sobre a hidrogeoquímica do rio Negro na orla de Manaus/AM

et al. 2009

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RESUMOO rio Negro, na orla de Manaus, recebe de seus tributários urbanos resíduos domésticos e industriais, cuja composição variada vem modificando as características naturais de suas águas. Com o intuito de avaliar o efeito da ação antrópica sobre o rio Negro foram coletadas amostras de água e analisadas as variáveis: pH, Eh, condutividade elétrica e alcalinidade (por potenciometria); oxigênio dissolvido (titrimetria); nitrogênio amoniacal e de nitritos (espectrofotometria); os cátions Ca, Mg, Na e K, e os metais Cd, Cu, Cr, Fe, Mn, Ni, Pb e Zn (por espectroscopia de absorção atômica -EAA). Os resultados obtidos para pH, condutividade, oxigênio dissolvido, nitrogênio amoniacal e nitritos mostram piora na qualidade da água do rio Negro, na foz dos igarapés São Raimundo (FISR) e Educandos (FIE) e a jusante destes (JIE), que são os dois maiores tributários urbanos e receptores de esgotos domésticos e efluentes industriais. Os metais predominaram na fase dissolvida e, a maior parte, está acima do limite máximo desejável, preconizado pelo ministério da saúde para águas destinadas ao abastecimento público, exceto cobre e zinco. O estudo mostrou que apesar da contribuição antrópica dos tributários urbanos, o rio Negro mantém, ainda, sua capacidade de diluir os poluentes, principalmente, no período de maior volume de água.PalavRaS-chavE: rio Negro, hidrogeoquímica, contaminação por metais pesados. The human action effects on the hydrogeochemistry of Negro river at the Manaus shoreline aBSTRacTThe Negro river, on the shoreline of the city of Manaus, receives an input of industrial and domestic wastes from its urban tributaries, which varying composition has been changing the natural characteristics of its waters. Aiming to assess the effect of the human action on the Negro River water samples were collected, and pH, Eh, electric conductivity and alkalinity (by potentiometry); dissolved oxygen (titrimetry); ammonia and nitrite (spectrophotometry); cations Ca, Mg, Na and K, and the metals Cd, Cu, Cr, Fe, Mn, Ni, Pb and Zn (by atomic absorption spectroscopy, AAS) were analyzed. The results for pH, electric conductivity, dissolved oxygen, ammoniacal nitrogen and nitrite values, indicated a worsening water quality in the Negro river, at the mouths of the São Raimundo (FISR) and Educandos (FIE) streams, which are the two major urban tributaries and receptors of domestic wastes and industrial effluents and downstream from them (JIE). Metals predominate in the dissolved phase and, apart from copper and zinc, are mostly above the maximum desirable limit allowed by the Health Ministry for human consumption. This study showed that in spite of the human contribution from its urban tributaries, the Negro river, still maintains its ability for diluting pollutants, mainly during the period of high water.

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Section: Localunclassified

Efeitos da ação antrópica sobre a hidrogeoquímica do rio Negro na orla de Manaus/AM

et al. 2009

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“…River water is generally collected with sampling bottles at depths of 0.5 -2 m below the surface. [10][11][12][13][16][17][18][19][20] Principal sampling areas have been Pontelagoscuro (Ferrara), 60 km from the mouth and 600 km from the source, [10][11][12][13][16][17][18][19][20] the Po di Pila channel and, in the delta area, in the river freshwater plume on the sea surface. [18][19][20] Samples are generally stored in polyethylene bottles or tanks, previously soaked with diluted HNO 3 and rinsed with ultrapure water.…”

Section: Ia -Water Samplingmentioning

confidence: 99%

“…[16][17][18][19][20][21] In view of this operational definition, SPM has been collected by classic filtration, under nitrogen pressure, on polycarbonate membranes [17][18][19][20] or nylon membrane filters. 16 The filters were pre-weighed, dried and weighed at the end of each filtration procedure. The solids were removed from the filters for subsequent investigation using a spatula, 16,17 or the SPM on the filters was treated with strong acid (HCl) to leach the metals of interest.…”

Section: Ib -Spm Collection and Preconcentration Treatmentmentioning

confidence: 99%

“…16 The filters were pre-weighed, dried and weighed at the end of each filtration procedure. The solids were removed from the filters for subsequent investigation using a spatula, 16,17 or the SPM on the filters was treated with strong acid (HCl) to leach the metals of interest. 18,20 Classic filtration has some severe drawbacks: effects such as clogging and aggregation have been recognized to provide artificial size samples during SPM collection and irreversible retention on the filtering membrane can lead to significant sample loss.…”

Section: Ib -Spm Collection and Preconcentration Treatmentmentioning

confidence: 99%

“…Investigations have focused on some important aspects regarding metal transport in the Po River: i) metal distribution between dissolved and particulate phases, both under normal conditions 16 and during a flood events; 17 ii) metal uptake on river sediments; 24,25 iii) the metal behaviour in the area where freshwater mixes with Adriatic Sea water. [18][19][20]26 In a review of Po Valley water quality, Marchetti et al 27 have studied the transport of SPM-associated metals.…”

Section: Ic -Different Approaches To Po River Spm Characterizationmentioning

confidence: 99%

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Metal Content in River Suspended Particulate Matter: Data on Po River

et al. 2004

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The present study summarizes the last ten years of literature on heavy metal distribution in Suspended Particulate Matter (SPM) and dissolved phase in the Po River (Italy). The work compares different methodologies employed to collect, concentrate and fractionate the samples. The importance of metal speciation as a function of particle size is underlined and two approaches to metal speciation in the colloidal fraction of Po River SPM are presented: Sedimentation Field-Flow Fractionation (SdFFF) and pH-dependent extractions. Finally, emphasis is placed on the need for comparison with a reference "natural background level" of the metal load in Po River particulate matter in order to determine the real human contribution to river pollution. The high values of some trace transition elements, such as Cr and Ni, have been compared with clay sediments around Ferrara and with bricks in historic buildings. The highly comparable natural concentration of these metals in Po fine sedimentary rocks and in historic brick buildings of Ferrara (XII-XVI centuries) can provide information on natural geochemical anomalies.

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The biogeochemistry of cobalt in the Mediterranean Sea

Dulaquais

Planquette

L’Helguen

et al. 2017

Global Biogeochemical Cycles

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The soluble (sCo < 0.02 μm), dissolved (DCo < 0.2 μm), colloidal (cCo, as DCo minus sCo), and the particulate (pCo > 0.2 μm) fractions of cobalt were investigated along the GEOTRACES-A04 section. Our results show that sCo was the predominant form (90%) of the DCo in the Mediterranean Sea and that cCo and pCo generally followed the same distribution, suggesting a biogeochemical link between these two fractions. In the Mediterranean Sea, DCo displayed an overall scavenged-like profile in the different sub-basins, with high concentrations (up to 350 pM) in surface and quasi-uniformed low concentrations of DCo (~45 pM) in the deep sea. However, the decoupling between the surface and the deep reservoirs suggested that the transfer of Co from dissolved to particulate pools during the sink of particles may not be the only process governing DCo distribution. High-surface Co inputs, stabilization of DCo in a soluble form, and the extremely high regeneration rate of biogenic pCo all lead to the accumulation of DCo in surface. Conversely, low pCo export from the surface waters, low remineralization of biogenic pCo, and slow but efficient removal of DCo by scavenging including colloid aggregation into particles prevented its accumulation in the intermediate and deep sea. Moreover, Mediterranean circulation prevented the exchanges between the DCo-rich surface and the DCo-poor deep layers enhancing the scavenged-like profile of DCo. Finally, tentative DCo budgets were balanced at basin scale and showed the strong imprint of the surface inputs at Gibraltar Strait on the Mediterranean cobalt biogeochemistry.

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Soluble and particulate metals in the Po River: Factors affecting concentrations and partitioning

Cited by 65 publications

References 26 publications

Efeitos da ação antrópica sobre a hidrogeoquímica do rio Negro na orla de Manaus/AM

Efeitos da ação antrópica sobre a hidrogeoquímica do rio Negro na orla de Manaus/AM

Metal Content in River Suspended Particulate Matter: Data on Po River

The biogeochemistry of cobalt in the Mediterranean Sea

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