Recognition of areas of anomalous concentration of potentially hazardous elements by means of a subcatchment-based discriminant analysis of stream sediments

Spadoni, M.; Voltaggio, Mario; Cavarretta, G.

doi:10.1016/j.gexplo.2005.08.001

Cited by 26 publications

(7 citation statements)

References 11 publications

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“…Afterwards, with increasing distance downstream, the As concentration decreases and levels down to a value which is high indeed (ca. 300 mgkg -1 ), but being probably consistent with the natural background to be expected in a region where soils mostly derive from acidic volcanics (Spadoni et al 2005).…”

Section: Chemical Analysessupporting

confidence: 82%

An integrated geochemical and mineralogical approach for the evaluation of arsenic mobility in mining soils

Kreidie¹,

Armiento

Cibin

et al. 2010

J Soils Sediments

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Purpose The assessment of risk related to the presence of potentially toxic elements in soils is strictly related to the knowledge of their form and mobility. These relevant properties depend on the complex interactions of the elements of concern with the soil particles that generally cannot be addressed by a single technique. This study presents an integrated approach implementing geochemical and mineralogical investigation techniques on samples from a former mining area (Tolfa Mountains district, northern Latium, Italy), where exploiting activities occurred until the recent past. In particular, the As total concentration and the As distribution in solid phases is studied with the aim to evaluate the possibility of environmental pollution and consequent risks for the health of people living in the area and possibly affected in case of significant mobilization of this toxic element.Materials and methods Chemical (ICP-MS, ICP-OES) and mineralogical (X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray (SEM-EDX), X-ray absorption near-edge structure (XANES)) analyses and the evaluation of the heavy metal mobility (by means of a sequential extraction procedure) were performed. Results and discussion Chemical analyses show a high As content in the soils collected immediately downstream the marcasite mine waste deposit, that is the starting point of As pollution over the whole area. XANES analyses show that As occurs in two oxidation states (As III and As V ) simultaneously in the tailing samples and nearby, while it has been mainly or totally transformed into As V at increasing distance from the mine. XRD data show that sheet silicates don't affect As behavior, whereas sequential extractions and SEM-EDX analyses reveal the evident association of As and Fe oxyhydroxides content. Conclusions The use of an integrated geochemicalmineralogical approach allows to single out the contaminant forms and the relative potential threat. Arsenic in the surface level of such soils could be mobilized in the case of extreme meteorological or of a not well planned human event, even though there is no evidence yet of any serious contamination of either underground or flowing waters.

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Section: Chemical Analysessupporting

confidence: 82%

An integrated geochemical and mineralogical approach for the evaluation of arsenic mobility in mining soils

Kreidie¹,

Armiento

Cibin

et al. 2010

J Soils Sediments

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“…Spadoni et al (2005) assessed the abundance of trace metals in stream sediment samples taken from the Mignone River and found average As and Mn values of 44.8 and 1168 mg/kg, respectively. These two elements are due to the geological formations present in the Mignone River basin.…”

Section: Discussionmentioning

confidence: 99%

“…The volcanic formations occupy 15 % of the river basin surface. The sediment is sandy for the conglomeratic formations and clay-like in the marl formations (Spadoni et al 2005;Scanu 2012). …”

Section: Study Areamentioning

confidence: 99%

Trace-Metal Enrichment and Pollution in Coastal Sediments in the Northern Tyrrhenian Sea, Italy

Piazzolla

Scanu

Frattarelli

et al. 2015

Arch Environ Contam Toxicol

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This study evaluated the distribution pattern and pollution of chromium, arsenic (As), manganese (Mn), nickel, lead, and copper in surface sediments along the northern Latium coast of the Tyrrhenian Sea in Italy. The enrichment factor, geoaccumulation index, and potential toxicity response index were used to evaluate the degree of contamination. These results show As and Mn contamination. The high enrichment and contamination levels of As and Mn are located in two hot spots. These elevations are due to naturally high levels of As and Mn in the Mignone River and the Marangone Stream as well as the intense human activity in the area including the largest energy production site in Europe (Torrevaldaliga Nord coal-fired power plant) and of one of the most important ports for cruise traffic in the Mediterranean Sea.

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“…It means that in sample catchment basins (or SCBs) modeling, the influence of each stream sediment sample is just its upstream area until the next sample upstream (Yousefi et al, 2013). Collected samples along a stream, which were genetically considered as a mixing between grains and particles of different nature, originated from erosive processes within a catchment basin (Spadoni et al, 2005). So, the geochemical characteristics of each sample were considered as a function of the composition of different geological materials and sediments of anthropogenic origin were transported along the hydrographical network (Bölviken et al, 1986;Lahermo et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Understanding the complex nature of stream sediments is a fundamental factor that should be considered to estimate the background concentrations and the presence of natural and unreliable anomalies (Spadoni et al, 2005). It is necessary to determine local background (predicted values) appropriate for each stream and remove this background from the observed values due to elimination of factors unrelated to mineralization (Carranza, 2004) and leave residuals from which the effects of anomalous geological processes (e.g., mineralization) may be seen (Carranza and Hale, 1997).…”

Section: Introductionmentioning

confidence: 99%

Identifying geochemical anomalies associated with Cu mineralization in stream sediment samples in Gharachaman area, northwest of Iran

Darehshiri

Panji

Mokhtari

2015

Journal of African Earth Sciences

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Recognition of areas of anomalous concentration of potentially hazardous elements by means of a subcatchment-based discriminant analysis of stream sediments

Cited by 26 publications

References 11 publications

An integrated geochemical and mineralogical approach for the evaluation of arsenic mobility in mining soils

An integrated geochemical and mineralogical approach for the evaluation of arsenic mobility in mining soils

Trace-Metal Enrichment and Pollution in Coastal Sediments in the Northern Tyrrhenian Sea, Italy

Identifying geochemical anomalies associated with Cu mineralization in stream sediment samples in Gharachaman area, northwest of Iran

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