Application of hydrologic-tracer techniques to the Casargiu adit and Rio Irvi (SW-Sardinia, Italy): Using enhanced natural attenuation to reduce extreme metal loads

Giudici, Giovanni; Medas, Daniela; Cidu, Rosa; Lattanzi, Pierfranco; Podda, Francesca; Frau, Franco; Rigonat, Nicola; Pusceddu, Claudia; Pelo, Stefania Da; Onnis, Patrizia; Marras, Pier Andrea; Wanty, Richard B.; Kimball, Briant A.

doi:10.1016/j.apgeochem.2018.06.004

Cited by 17 publications

(15 citation statements)

References 42 publications

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“…During the hydrologic campaign [1] along Rio Irvi, 30 instream sites were selected for water sampling. For each site, 5 aliquots were collected.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…In this paper, a geochemical modelling dataset on water samples collected along the mining-affected Rio Irvi (SW Sardinia) is presented. Rio Irvi is a stream located in the Montevecchio-Ingurtosu mining district and is affected by mine drainage from an old flooded mine adit (Casargiu adit); as a result, the stream has very high contaminant loads, although attenuation processes that lead to the attenuation of Fe and SO 4 2− loads [1] thanks to the precipitation of Fe oxyhydroxides and sulphate-bearing green rust [2] . Furthermore, PXRD data of newly-formed mineral phases collected along Rio Irvi stream are presented.…”

Section: Datamentioning

confidence: 99%

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Geochemical and mineralogical datasets on waters and stream precipitates from an abandoned mining site: Montevecchio-Ingurtosu district, Rio Irvi (SW Sardinia)

et al. 2019

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Geochemical modelling data and Powder X-Ray Diffraction data on samples collected along Rio Irvi (Montevecchio-Ingurtosu mining district, SW Sardinia, Italy) are reported in this paper. The data show the results of data processing to calculate water chemical speciation of ions and saturation indices of relevant mineral phases. These data are related with the research article: De Giudici G. et al (2018), Application of hydrologic-tracer techniques to the Casargiu adit and Rio Irvi (SW-Sardinia, Italy): Using enhanced natural attenuation to reduce extreme metal loads, Applied Geochemistry, vol.96, 42–54. The comparison of the calculated saturation indices of relevant Fe-bearing phases with the PXRD data of samples collected along the stream confirm the quality of the SI dataset and the good correlation between the calculations and the observed data. The comparison of this dataset with others can help to deeper understand and quantify the impact of past and current mining activity on water bodies, contributing to implement the scientific background for the application of remediation actions.

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“…During the hydrologic campaign [1] along Rio Irvi, 30 instream sites were selected for water sampling. For each site, 5 aliquots were collected.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

Geochemical and mineralogical datasets on waters and stream precipitates from an abandoned mining site: Montevecchio-Ingurtosu district, Rio Irvi (SW Sardinia)

et al. 2019

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“…The samples of Juncus acutus were harvested along the banks of two streams that flow within the above described mine district (Figure 1). The seasonal behavior of the two selected streams—Rio Irvi, Casargiu [45,46] and Rio Naracauli [47], Ingurtosu—is due to the climate of southern Sardinia, characterized by a long dry season starting in May and ending in September or October with minimum rainfalls in July and maximum in November [48]. Sampling was performed at the end of the dry period and thus with low levels in the streams.…”

Section: Field Occurrencementioning

confidence: 99%

XRD-Thermal Combined Analyses: An Approach to Evaluate the Potential of Phytoremediation, Phytomining, and Biochar Production

Fancello

Scalco

Medas

et al. 2019

IJERPH

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A method for evaluating the potential of reuse of biomasses for economic purposes is here presented starting from a case study. Juncus acutus plants and rhizospheres were harvested from abandoned Zn–Pb mine areas of southwest Sardinia (Italy). Thermogravimetry and Differential Thermal analyses were performed to evaluate the temperatures at which significant reactions occur. X-ray Diffraction (XRD) analysis was carried out on raw samples and on samples heated ex-situ (by a conventional diffractometer) or in-situ (by synchrotron-based diffraction). Raw samples mainly consist of quartz, phyllosilicates, and feldspars with minor amounts of sulfides, sulfates, and Fe, Pb, and Zn carbonates, concentrated in the rhizosphere. After heating, Zn and Fe oxides and willemite are observed in internal roots and stems, revealing the presence of these metals in the plant tissues. In-situ heating was less effective than ex-situ in revealing minor phases in organic samples, probably because the scarcity of oxygen within the sample holder did not allow the degradation of organic compounds and the oxidation of sulfides, resulting in a low quality XRD signal even if obtained with the high resolution ensured by a synchrotron light source. This method can be applied to plants from polluted sites for metal exploitation, and/or to biomasses from unpolluted sites for biochar production, since both applications take advantage of the knowledge of the minerals formed after heating.

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“…This C. melkonianii strain well adapted to this contaminated environment may be used for the development of new and sustainable phycoremediation technology strategies (De Giudici et al 2018;Kothe et al 2005). Furthermore, Coccomyxa actinabiotis showed high silver levels confined inside microalgae, when grown in contaminated waters containing silver ions (Leonardo et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…This mining site of Montevecchio-Ingurtosu (Sardinia, Italy) is characterized by minerals such as galena (PbS 2 ) containing appreciable levels of silver, sphalerite ((Zn, Fe)S) containing Cd, Ga, In, and the oxide mineral goethite (α-FeO(OH)). For this reason, this site is rich in pollutants, with levels of Zn 2+ at 956 mg/L, Fe 2+ at 227 mg/L, and sulfates at 3697 mg/L, released into the river by oxidation reactions involving the sulfide minerals still present in the ore bodies after flooding of galleries (De Giudici et al 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Metabolomics and lipid profile analysis of Coccomyxa melkonianii SCCA 048

et al. 2021

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With an unsupervised GC–MS metabolomics approach, polar metabolite changes of the microalgae Coccomyxa melkonianii SCCA 048 grown under standard conditions for seven weeks were studied. C. melkonianii was sampled at the Rio Irvi River, in the mining site of Montevecchio-Ingurtosu (Sardinia, Italy), which is severely contaminated by heavy metals and shows high concentrations of sulfates. The partial-least-square (PLS) analysis of the GC–MS data indicated that growth of C. melkonianii was characterized by an increase of the levels of threonic acid, myo-inositol, malic acid, and fumaric acid. Furthermore, at the sixth week of exponential phase the lipid fingerprint of C. melkonianii was studied by LC-QTOF-MS. C. melkonianii lipid extract characterized through an iterative MS/MS analysis showed the following percent levels: 61.34 ± 0.60% for triacylglycerols (TAG); 11.55 ± 0.09% for diacylglyceryltrimethyl homoserines (DGTS), 11.34 ± 0.10% for sulfoquinovosyldiacylglycerols (SQDG) and, 5.29 ± 0.04% for lysodiacylglyceryltrimethyl homoserines (LDGTS). Noteworthy, we were able to annotate different fatty acid ester of hydroxyl fatty acid, such as FAHFA (18:1_20:3), FAHFA (18:2_20:4), FAHFA (18:0_20:2), and FAHFA (18:1_18:0), with relevant biological activity. These approaches can be useful to study the biochemistry of this extremophile algae in the view of its potential exploitation in the phycoremediation of polluted mining areas.

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Application of hydrologic-tracer techniques to the Casargiu adit and Rio Irvi (SW-Sardinia, Italy): Using enhanced natural attenuation to reduce extreme metal loads

Cited by 17 publications

References 42 publications

Geochemical and mineralogical datasets on waters and stream precipitates from an abandoned mining site: Montevecchio-Ingurtosu district, Rio Irvi (SW Sardinia)

Geochemical and mineralogical datasets on waters and stream precipitates from an abandoned mining site: Montevecchio-Ingurtosu district, Rio Irvi (SW Sardinia)

XRD-Thermal Combined Analyses: An Approach to Evaluate the Potential of Phytoremediation, Phytomining, and Biochar Production

Metabolomics and lipid profile analysis of Coccomyxa melkonianii SCCA 048

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